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4250 Area Velocity Flow Meter User Manual

1. Section 2 Programming 4250 Flow Meter ON S SH A UOT eI e5 POO pu aQ uru1em 10117 ON S ON a pm1 40 uuw 10 117 wo SW XXX a qeysuayM Ja Uq ssid J Buneiqued N emased ry UIyeIqN eD Apeaiuaym J91Uq Ssald Hd XXX a qeis Uaym 19447 ssalg uognjossyun XXX Ul aqosd ade q uonnjos 0 01 yd uladejd pueaqoidasu ly A sa uo uq e poo9 gt S uo euq 112 pooy suun XXX epugs yapnpuo gt u7 ON S a 7 pu ao urusem 10117 ON S A A APWAAO BulweMysos sz ON dd wo sw YIM asea d ON en ley asea suun uogeiqie gt Aumonpuos mug H Bugesq yed bunein e Hd XXX aiqeysuaym 37 A uol yeaq 12 gt poo ae sa A PRAP POO uonnjos 0 01 yd ul adejd pueaqoid su iy Hd XX XAS UYM 1g Sad 4 ON S ETET 3 EINT uonNJosS O Z Ud Ul 322jd PUY EqOld asulY APLAAO HulWeM JOI 19 agin A ete Boe v ON SOK A uor ye1q fe POOH VOW XX X Aqeisuaym Ja Uq ssald ON S ON S Buneiqyed APLUBAO Hujusem 1011 9 F To pm ao BUIUIeM JO1 13 A ON v ON HEM seld pe 1 UYM 1937 SS ld Buneiq e gt dnd uoneiqye ulaqoid d A A Hd XxX xX a qeisuaym U7 ssald Hd XX X ApeasueyM 170 Ssolqg WH uonnjos 0 Z yd u dejd pueaqoid suly uonnjos 07 yd ul vejdpue aqoid asury Aqua apnyyye 104 SHUN SO uo euq eD poop EN Uo eq e3 poop pq ON S ON S2 amp SOA uon es qied poop SH uo yaaq Ied poog p
2. 5 Inches 6 Inches 4 Inches Figure 3 7 Methods of Level Measurement However if you do install the sensor in a channel that has a primary measuring device weir or flume install it upstream or downstream from the device not inside the device Primary devices with narrowed passages most flumes change the velocity of the liquid as it passes through the device To min imize this effect install the AV sensor at a point where the stream velocity has returned to normal Install the AV sensor at the prescribed measuring point of a primary measuring device if you only want to measure level In such instances program the flow meter using level to flow rate conversion with a secondary indication of velocity rather than area velocity conversion see Section 2 Information on where to install the sensor is available for most primary measuring devices from the Isco Open Channel Flow Measurement Handbook or from the manufacturer of the device 3 15 4250 Flow Meter Section 3 Installation 3 7 Rectangular and Trapezoidal Channels A flat anchored mounting plate is a common mounting choice for installing sensors in rectangular or trapezoidal channels See the Isco Mounting Rings Installation and Operation Guide for more information Figure 3 8 Isco Rectangular Mounting Plate 3 8 Mounting Rings for 3 16 Circular Channels 3 8 1 Spring Rings Consult your Isco Mounting Rings Installation a
3. 4250 Flow Meter Section 2 Programming This step lets you determine the contents of the reports gen erated by the flow meter The flow meter s report generator is capable of creating two different reports A and B that can be identical or quite different The reason for two reports is to allow the summary of flow meter recording over different time periods For example you might generate report A weekly and report B monthly At this point we are only interested in selecting the items the flow meter will include in each report Press Enter and the following will appear REPORT SETUP e FLOW e e DO PH e YSI 600 e SAMPLE HISTORY e FLOW METER HISTORY is just off the screen to the right If you select FLOW and press Enter the following will appear LEVEL IN REPORT e YES e NO Select YES if you want LEVEL to appear in the report then press Enter The following will appear FLOW RATE IN REPORT e YES e NO Select YES if you want FLOW RATE to appear in the report then press Enter again Then RAINFALL IN REPORT e YES e NO Select YES if you want RAINFALL to appear in the report Note that you must have a rain gauge connected to the flow meter to sense rainfall occurrence Press Enter The following will appear REPORT SETUP e FLOW e e DO PH e e YSI 600 e SAMPLE HISTORY e FLOW METER HISTORY is off the screen to the right Select DO PH Press Enter The following will ap
4. Note The output string for a given flow meter will have values only for those parameters it is currently measuring The order of the fields in this table is subject to change Additional data types may be inserted anywhere in the list Parsing routines for this output string should search by type identifier instead of depending on the position in the string If an active port has an error flag set the serial output will insert ERROR for the value You can enter the command line by connecting the interrogator cable with the interrogator sense line shorted to ground Then send a series of question marks until the flow meter transmits the unit s banner and prompt The number of question marks necessary is a function of the baud rate auto detection At the prompt enter DATA lt CR gt and the flow meter will respond with the appropriate ASCII output string You can send the DATA command as often as you want Type Q to leave the command response interface In addition to the port values the data includes the flow meter s current time the bottle number and time stamp of the three most recent sample events the previous day s rainfall total mid night to midnight the current day s rainfall total since mid night and a rainfall tips counter that rolls over every 255 tips See Rain Gauge The port values appear in a comma sepa rated values format Each data field is preceded by a two or three character typ
5. Maximum Long term Drift 0 033 ft 0 010 m Velocity Measurement Method Doppler Ultrasonic Frequency 500 kHz Transmission Angle 20 from horizontal Typical minimum depth for velocity measurement 1 inch 25 mm Range 5 to 20 ft s 1 5 to 6 1 m s Velocity Accuracy 5 to 5 ft s 1 5 to 1 5 m s 0 1 ft s 0 03 m s 5 to 20 ft s 1 5 to 6 1 m s 2 of reading Velocity accuracy for a uniform velocity profile in water with a speed of sound of 4 850 ft s 4250 Flow Meter Section 1 Introduction Table 1 5 4250 Chart Longevity M Note Report Generator is turned off Chart Speed Inch Hour Time to Empty Roll 4 71 4 Days 2 141 2 Days 1 29 Days 0 5 58 Days Table 1 6 Battery Life Expectancy Flow Meter Settings Minimum Default Maximum Level Reading Interval 1 Minutes 5 Minutes Continuous Velocity Reading Interval 5 Minutes 30 Minutes Continuous Printer Off Off 4 per Hour Report Generator Off Off Every Hour Average Current 14 mA 11 mA 70 mA Nickel Cadmium 10 7 Days 13 6 Days 2 1 Days Lead Acid 17 4 Days 22 1 Days 3 4 Days 1 These values are approximations based on calculations actual times for your flow meter may vary substantially due to factors of battery age charge condition operating temperatures and component differences Minimum settings are those providing the lowest average
6. Temperature Compensation Performed by software inside the flow meter The standard pH Probe contains an integral temperature sensor 4 10 3 Storage and 4 20 Maintenance of pH Probes If you remove the pH probe from operation be careful to keep the glass sensor bulb wet Always store the probe with the rubber cover screwed completely over the threaded end of the sensor Exposure to air causes the glass membrane on the sensor bulb to dry out This makes it very slow to respond in solution Pro longed or repeated dehydration of the bulb will ruin the probe 4 11 Dissolved Oxygen D O Probe 4250 Flow Meter Section 4 Options and Accessories The pH sensitive glass can also become conditioned to its envi ronment especially when it is continuously exposed to high pH 10 and above solutions The glass does have a memory and will respond slowly when exposed to a lower pH solution after having been in a high pH solution for any significant period of time Storage of a pH probe in a 4 0 buffer solution is recommended as this has a regenerative effect on the glass and does not put a memory on it Tap water will work if 4 0 buffer solution is not available Deionized water is good for quick rinses to clean the element but not for prolonged storage of an electrode Con tinuous exposure of the ion sensitive membrane to a wetted but non ionic solution will improperly condition the membrane The reference electrod
7. Check to see that the crystal oscillator is operating and at the proper frequency Check the reset circuitry to see that it is working properly 5 15 4250 Flow Meter Section 5 Maintenance and Service 5 7 Precautions for Most of the circuitry in the 4250 Flow Meter is made up of CMOS Servicing CMOS components Because of the oxide gate structure of these devices Circuitry they are extremely susceptible to destruction caused by the dis charge of static electricity through their inputs Note that many of the driver transistors in the 4250 are power MOS devices they are just as susceptible to static damage as CMOS ICs are Because of this risk certain precautions must be taken when working on these circuits 5 7 1 Hazard of Static The voltage levels present from static buildup due to walking Electricity over carpeted floors movement of woolen or synthetic clothes over chair seats workbenches etc are high enough to destroy CMOS circuitry when performing repair work Ideally all tools soldering irons etc should be grounded and work should be conducted on a grounded metal workbench with grounding straps worn on the wrists of personnel It is recog nized that in most field repair situations such precautions are impractical However certain extreme hazards must be avoided e Never perform any work in a room with a carpeted floor e Always roll up sleeves so that your arms are in contact with the working surface
8. DISSOLVED OXYGEN CALIBRATION D O STANDARDe ABS BAROMETRIC PRESSUREs gt ALTITUDE is just off screen to the right If you select D O STANDARD for the calibration method the following display will appear D O STANDARD 0 00 MG L If you select ABS absolute BAROMETRIC PRESSURE the fol lowing will appear ABS BAROMETRIC PRESSURE X XX mmHg Absolute barometric pressure is barometric pressure not corrected to sea level The barometric pressure published by the U S Weather Bureau is adjusted to sea level If you use their value you must convert it to the absolute pressure for your altitude You should use Weather Bureau barometric pressure only if you are at sea level or are able to correct the Weather Bureau figure to absolute pressure at your location Enter the correct value WRAP D O PROBE IN MOIST CLOTH PRESS ENTER WHEN STABLE X XX MS CM Then the display will advance to the following CALIBRATING PLEASE WAIT If you select ALTITUDE for D O this will appear UNITS FOR ALTITUDE ENTRY eFTeeMe 2 45 4250 Flow Meter Section 2 Programming 2 46 Select the appropriate units and press Enter ALTITUDE ALTITUDE X XX FT or meters Enter the altitude for your location Then WRAP D O PROBE IN MOIST CLOTH PRESS ENTER WHEN STABLE X XXX MG L For more detailed information on the pH and D O probes see Section 4 Returning to step 3 Parameter to Adjust the f
9. This menu lets you select how often the flow meter transmits the ASCII text string Following is an example of a string showing all options In actual practice there are no carriage returns in the text string DE Theresa Street 1ID 0721577657 MO 4250 T1 35317 343715 BV 12 3 LE 0 1000 VE 0 1225 FL 0 001555 VO 2 199325 FV 2 199325 RV 0 000000 SV 2 1955 39 SS 1 B0 35317 307384 B0 35317 269907 B0 35317 2325 93 CS 10819 If you select any of these outputs the flow meter will request that you turn them on or off If you are running on battery and do not need these options select OFF Otherwise select ON After the OPTIONAL OUTPUTS menus have been set press Enter The display will return to the SETUP menu The alarm box also called the High Low Alarm Box allows you to operate control relays to signal alarms when flow rate rises above or falls below a certain set value You can set both the high and low alarm values from 1 to 99 of the controlling con dition See Section 5 for more information about the alarm box If you select any of these outputs the flow meter will request that you turn them on or off If you are running on battery and do not intend to use either of these options select OFF Otherwise select ON After the OPTIONAL OUTPUTS menus have been set press Enter The display will return to the SETUP menu This time select REPORT SETUP with the arrow key Press Enter REPORT SETUP e REPORT A e REPORT Be
10. You can avoid this problem completely by preventing moisture from entering the reference tube in the first place Maintain the desiccators Inspect them frequently and regenerate them when necessary 3 1 3 Opening the Case 3 2 Connection to a Power Source 3 2 1 Low Power Indication 3 2 2 Isco Sampler 4250 Flow Meter Section 3 Installation To access the flow meter controls and plotter you must open the case Unlatch the two catches on the right side of the case and pull open the lid You will need to open the case whenever you change the plotter chart or change the programming with the keypad You can read the display through the window so you can take periodic readings without opening the case Again do not allow the flow meter to operate routinely with the door open The 4250 requires a 12 volt direct current 12 VDC power input This power may come from various sources e Companion Isco sampler e Isco Nickel Cadmium Battery e Isco Lead Acid Battery e Isco AC Power Supply e External 12 VDC battery such as a deep cycle marine or RV type Detailed information on power sources is provided in the Power Products Guide provided with this manual The procedures for connecting various power sources to the flow meter are discussed in the following sections When power to the flow meter falls too low for the unit to operate properly the message POWER LOST LOW BATTERY will appear on the top line of the display When po
11. 0 0 ccc ett 1 8 1 3 Technical Specifications for the Standard AV Sensor 06 1 10 1 4 Technical Specifications for the Low Profile AV Sensor 4 1 11 1 5 4250 Chart Longevity srar mai ces pede te bay a Maw Le te eee sd 1 12 1 6 Battery Life Expectancy 0 0 ccc eee eens 1 12 2 1 ASCH Output Codes s 5 2 50 roi eX parece es ee ee eae eae Ode eR ED 2 22 4 1 4 20 mA Output Interface Specifications 0 cece eee eee 4 5 4 2 Multiple Analog Output Board Specifications 0 0c cece ee eee 4 7 4 3 pH Probe Specifications 0 0 eee nee nee eees 4 20 4 4 D O Probe Specifications snanu seneesa urner n eens 4 25 A 1 Replacement Parts List 0 0 0 cette eens A 4 C l Hazardous Gases ses inesi anaes kaea hie Waly Sng eile 4 OS hoe a eee eR C 6 4250 Flow Meter Table of Contents 4250 Flow Meter Section 1 Introduction This section of the instruction manual provides a general intro duction to the 4250 Area Velocity Flow Meter It includes a description of the flow meter an explanation of how the unit operates and technical specifications Manual Organization This manual provides the information necessary to operate maintain and perform minor service on the 4250 The manual is organized into five sections Section 1 Introduction operation and specifications Section 2 Keypad operation and programming for the flow meter Section 3
12. 3 2 6 External 12 Volt Direct You can also power the flow meter from an external 12 VDC Current Source source such as an automotive motorcycle or marine battery Many people have found that a deep cycle marine RV battery is particularly well suited to this application However you will have to mount batteries of this type externally as they are too large to fit on top of the flow meter Teledyne Isco offers a special optional connect cable to power the flow meter from a separate battery Mount the battery securely in an upright position so it will not inadvertently tip over or be at risk of having its cable pulled off N CAUTION Be sure of proper polarity before attaching clips to the battery Never attach the flow meter to a source of unknown polarity or voltage If in doubt check with a reliable DC voltmeter Never attach the flow meter directly to an AC power source under any circumstances Charge batteries only with compatible equip ment in accordance with manufacturer s instructions 3 6 3 3 Flow Meter Mounting and Installation 3 3 1 Carrying Handle 3 3 2 Location of the Flow Meter 3 3 3 Mounting the 4250 4250 Flow Meter Section 3 Installation The 4250 Flow Meter is a portable device you may install it per manently or temporarily You can suspend the flow meter in tem porary installations such as sewers or mount it permanently in other installations such as treatment plants at your option CAUTI
13. ENTER REPORT B DURATION XX HOURS DAYS or MONTHS could also appear depending on what you selected for the previous step The time selected becomes the time interval that will be covered in the report Then the flow meter will ask you when you want the first report printed PRINT REPORT A AT YR XXXX MONTH XX DAY XX HR XX MIN XX After you have entered the desired date for the first report the program will advance to the following PRINT FLOW METER HISTORY e YES e NO 2 4 13 Flow Meter History Contents 4250 Flow Meter Section 2 Programming The final step on the flow meter is FLOW METER HISTORY This step presents a record of the programming activity on the flow meter that you can have printed on the printer The flow meter keeps a record of certain programming changes and prints them out If you select YES the following will appear PRINT FLOW METER HISTORY e PRINT SINCE LAST PRINT ALL If you select PRINT SINCE LAST the flow meter will only print the changes that have occurred since the last print request If there were no changes there will be no print If you select PRINT ALL the flow meter will print all the changes it has in memory as far back as 50 entries If you selected NO from PRINT FLOW METER HISTORY the flow meter will advance to CLEAR HISTORY YES NO If you select NO again the flow meter will exit programming and return to the normal display If you clea
14. Operating Temperature 32 to 160 F 0 to 71 C Level Measurement Method Submerged pressure transducer mounted in the flow stream Transducer Type Differential linear integrated circuit pressure transducer Level Measurement Range Standard Range Extended Range 0 05 to 10 0 ft 0 015 to 3 05 m 0 05 to 30 0 ft 0 015 to 9 14 m Maximum Allowable level Standard Range Extended Range 20 ft 6 1 m 40 ft 12 2 m Level Measurement Accuracy Standard Range Extended Range 0 033 to 5 0 ft 0 008 ft ft 0 01 to 1 52 m 0 008 m m gt 5 0 ft 0 012 ft ft gt 1 52 m 0 012 m m 0 05 to 15 0 ft 0 03 ft 0 015 to 4 57 m 0 009 m 0 05 to 21 0 ft 0 09 ft 0 015 to 6 40 m 0 027 m 0 05 to 30 0 ft 0 30 ft 0 015 to 9 14 m 0 090 m 77 F 25 C Includes non linearity repeatability and hysteresis Does not include temperature coefficient Compensated Temperature Range 32 to 100 F 0 to 38 C Temperature Coefficient Standard Range Extended Range 0 05 to 4 0 ft 0 005 ft F 0 015 to 1 22 m 0 0027 m C 4 0 to 10 0 ft 0 007 ft F 1 22 to 3 05 m 0 0038 m C 0 05 to 30 0 ft 0 008 ft F 0 015 to 9 14 m 0 0044 m C Maximum error over compensated temperature range per degree of tem perature change Velocity Measurement Method Doppler Ultrasonic Frequency 500 kHz Typical minimum depth for velocity measuremen
15. Ss Safety Information C 1 Scissors Ring 3 18 Serial Output 2 22 4 4 ASCII Codes 2 22 Service and Troubleshooting CMOS Circuitry 5 16 Disassembling the Flow Meter 5 11 Display Warnings 5 13 Fuses 5 12 Getting Help 5 14 Inspection Protocol 5 14 Preliminary Steps 5 14 Software Reset 5 13 Software Flowlink 4 12 Reset 5 13 updates 5 18 T Technical Specifications 4250 1 8 Low Profile Probe 1 11 Standard Probe 1 10 Temperature Probe 4 14 Troubleshooting Steps 5 14 W Wastewater Sampler 3 20 Y YSI 600 Sonde 2 8 4 27 Calibration 2 46 Programming Screens 2 31 Fmhasa SWAT ANaMRee Name and amount of Hazardous Substances or Elements in the product PRA EW ABO BH EZ Bh Hazardous Substances or Elements Component Name in 7K i INE ZRK PRIRA Pb Hg Cd Cr VI PBB PBDE ii X O O O O O Circuit Boards a JR x O O O O O Display Ed O O O O X O Wiring JEA O O O O X O Keypad Bin Bt eis x o o o x o DC Motor EA O O X O O O Connectors FP RhSeSsaSYyRARTSWBMRESHB Name and amount of Hazardous Substances or Elements in the product O RARBZRSRSVREBRAEMASAM A PHS BEST MEMEN REZ RAT O Represent the concentration of the hazardous substance in this component s any homogeneous pieces is lower than the ST standard limitation X RRBASASVRESEZRHINR HRASAHSEEUST MERENREER ALTEA AGES EN EPH KX
16. the month 01 12 the day 01 31 the hour 01 24 and the minute 01 59 If you select SITE ID the following will appear SITE ID XXX You can select any suitable three digit number for the site identi fication If you select MEASUREMENT SETUP the following will appear You will have to use the right arrow key to bring all the options on screen MEASUREMENT SETUP e LEVEL READING INTERVAL VELOCITY READING MEASUREMENT SETUP e MINIMUM DEPTH ZERO LEVEL OFFSET MEASUREMENT SETUP e ZERO FLOW ON ERROR DO PH READING INTER MEASUREMENT SETUP DO PH READING INTERVAL eYSI 600 READING INT LEVEL READING INTERVAL refers to how often the flow meter takes a level reading LEVEL refers to the level in the flow stream 4250 Flow Meter Section 2 Programming DO PH READING INTERVAL refers to the measurement of spe cific aspects of the flow stream other than amount 4250 Flow Meters support measurement of three different characteristics temperature pH the relative acidity or alkalinity of a solution and D O dissolved oxygen M Note If you are using the Isco D O sensor or are sensing D O with the YSI 600 Sonde select as long a measurement interval as is practical for your application The reasoning is that the D O sensor is turned off between measurement intervals and this turned off period prolongs the life of the sensor YSI 600 READING INTERVA
17. 14 Errors in level measurement have a greater effect on flow cal culations at low liquid levels Dimensional errors tend to be more significant at higher levels If you select pH for Parameter to Adjust the following display will appear pH will not appear as an option unless you have selected it in step 1 If you want to measure pH and pH does not appear in this step you must go back to step 1 and select pH instead of NOT MEASURED pH CALIBRATION pH4 amp 7 pH7 amp 10 pH 4 7 amp 10 You can perform a two or three point calibration for pH with the pH sensor Select the calibration that best suits your stream s profile If the pH in your stream in generally below 7 you would 4250 Flow Meter Section 2 Programming probably select pH 4 amp 7 If the pH is generally above 7 you would probably select pH 7 amp 10 If your stream s pH varies a great deal say from 3 to 12 your best choice would be pH 4 7 amp 10 Then RINSE PROBE AND PLACE IN 4 0 pH SOLUTION PRESS ENTER WHEN STABLE X XX pH The flow meter will direct you to repeat this process with the other standard buffers 7 and or 10 to calibrate the pH sensor If the probe fails to provide the correct output with any of the buffer solutions you will receive the following message pH BUFFER PROBE OUT OF RANGE PRESS ENTER TO CONTINUE If you select D O for Parameter to Adjust the following display will appear
18. AAR ARETE AA X Represent the concentration of the hazardous substance in this component s at least one homogeneous piece is higher than the ST standard limitation Manufacturer may give technical reasons to the X marks IMR SA AE The Environmentally Friendly Use Period EFUP was determined through experience EPA REARS WE UREA ES F207 RR 2007 F MAN KFRERA A A BAZA The date of Manufacture is in code within the serial number The first three numbers are the year of manufacture 207 is year 2007 followed by a letter for the month A is January B is February and so on Table Hazmat 4200 Series F M 60 3213 371 Rev Fmhasa SMart ANanReas Name and amount of Hazardous Substances or Elements in the product ABA EW RMIT BEE Hazardous Substances or Elements Component Name ta WK ia INTER ZIRIKA ZRA Pb Hg Cd Cr VD PBB PBDE BBB AR X O O O O O Circuit Boards KBB BS nee o o o o x o External Cables anta RAEMARTRHEARREE Name and amount of Hazardous Substances or Elements in the product O RRBASASVREBR ASRS A EE EST MEMENRBRRAE O Represent the concentration of the hazardous substance in this component s any homogeneous pieces is lower than the ST standard limitation X RRBASASUWREYEBRTHOR HRAMAPHSRRUST ENERE RR AU TEIA REKREI ERPI AR ETRE AA X Represent the concentration of the hazardous substance in this compone
19. Instead use the value that is the largest expected level for your actual situation even if this is less than the published maximum The flow meter s internal resolution and its accuracy are based on the value you enter for Maximum Head The flow meter will display FLOW RATE AT MAXIMUM HEAD X XXX CFS or other units of measure Programming the 4 20 mA Outputs M Note If you do not turn on the 4 20 mA output s in step 1 the menus determining its their operation will not even appear later in the program If you need this function and cannot find the appropriate menus in step 2 return to step 1 Setup and check to see that you have not inadvertently switched the option off If you turn on any of the 4 20 mA outputs ANALOG OUTPUTS in step 1 Setup programming the actual operation of the output appears in step 2 Select Flow Conversion For each 4 20 mA output port turned on the flow meter will request entry of the type of data that will drive the output along with minimum and maximum values Here is an example of what you might see for programming analog output 1 DATA TYPE FOR ANALOG OUTPUT 1 e OFF LEVEL FLOW RATE s VELOCITY pH e TEMPERATURE DISSOLVED OXYGEN CONDUCTIVITY SPECIFIC CONDUCTANCE SALINITY and TOTAL DIS SOLVED SOLIDS may also appear as driving conditions The actual choices available to you will depend on what ports you have turned on previously and what accessories YSI pH DO prob
20. This list does not include all possible screens for the unit but does cover the screens found in a typical programming sequence Some diagnostic and error screens are covered in Section 5 Turn on the machine Wait for the display to settle Then press the Enter Program Step Enter key The following will appear Step 1 If the following menu does not appear press Exit Program then Go To Program Step then press 1 SELECT OPTION e PROGRAM e e SETUP e PROGRAM is always the default If you press Enter the display will automatically advance to the next display which will ask you to select units of measurement If you select SETUP the fol lowing will appear SETUP OPTIONS EXIT TO QUIT e SET CLOCK e SITE ID e MEASUREMENT SETUP e 4250 Flow Meter Section 2 Programming 2 12 If you press the right arrow key the following options will appear in this order on the display SETUP OPTIONS EXIT TO QUIT e STATUS ENABLE ALARM HYSTERESIS e SETUP OPTIONS EXIT TO QUIT e OPTIONAL OUTPUTS e REPORT SETUP e SETUP OPTIONS EXIT TO QUIT e LCD BACKLIGHT LANGUAGE e PROGRAM LOCK e SETUP OPTIONS EXIT TO QUIT e LANGUAGE PROGRAM LOCK e e PROGRAM e US domestic models contain only English plus one other foreign language as ordered If you select SET CLOCK the following will appear YEAR MONTH DAY HOUR MIN XXXX XX XX XX XX Enter the year four digits
21. and F is the power to which H is raised k2 and P are a second constant and power found in some equations If your equation has only one term you should enter 0 for the second constant 4250 Flow Meter Section 2 Programming Returning to Step 2 SELECT FLOW CONVERSION if you select MANNING the following will appear SELECT MANNING TYPE e ROUND PIPE e e U CHANNEL RECTANGULAR e T TRAPEZOIDAL is also available if you move to the right with the right arrow key If you select ROUND PIPE for the Manning flow conversion the following displays will appear MANNING ROUND PIPE SLOPE X XXXXX ROUGH X XXXX Slope is entered as a dimensionless quantity delta Y delta X not as percent slope Or as otherwise expressed AX E Rise AY 5 Run For 1 example 00 01 Roughness coefficients are published in the Isco Open Channel Flow Measurement Handbook You must know the material the pipe is made of The roughness coefficients are published for all common materials in three grades minimum normal and maximum Then MANNING ROUND PIPE DIAMETER X XXX FEET or meters If you select U CHANNEL for the Manning flow conversion the following displays will appear MANNING U CHANNEL SLOPE X XXXXX ROUGH X XXX Slope and roughness are entered as for ROUND PIPE previ ously Then MANNING U CHANNEL WIDTH X XXX FEET or meters If you select RECTANGULA
22. best and remain most reliable if you follow these simple proce dures If you close and latch the lid and cap all the M S connectors on the side of the case tightly you can clean the case by spraying it with a hose or washing it with soapy water Do not use a hose with a nozzle or a high pressure hose and wand Do not immerse the flow meter in a tank of water to wash it The flow meter can usually withstand accidental submersion in water if that should occur but it is not intended for routine submersion From time to time you should inspect the case seal and clean it if necessary The ridge around the edge of the case and the groove on the cabinet door form a seal when the door is closed Keep this seal free of dirt sand etc If it isn t clean it carefully with a damp cloth Also keep the rubber gasket in the lid clean You can clean it with a small brush and a damp cloth If you do any cleaning while the case is open be careful not to let any dirt or debris fall inside the flow meter assembly It is best to work on the flow meter with the case standing upright If you don t maintain the seals properly they may leak causing damage and eventual failure of the components inside To prevent moisture damage to the internal components keep the lid tightly latched at all times except when it is necessary to change the program or change the chart Do not operate the flow meter routinely with the case open This will expose the internal
23. changing or meeting a condition or set of conditions triggers the enabling The conditions that can be used for sampler enabling are similar to those used for sampler pacing level flow rate rainfall temperature dissolved oxygen pH or a combination of these conditions The YSI 600 Sonde provides several measurements at the same time You must have the appropriate sensors for rainfall temperature D O pH and the YSI outputs M Note You must have the optional modem to make use of this pro gram step The menus will not even appear unless the flow meter has a modem installed This feature allows you to program a 4200 Series Flow Meter to signal a remote location through a telephone line The Alarm Dialout is useful if you need to signal a remote location when there is a change of condition in the flow stream that could con stitute an alarm You can program as many as five different eighteen digit telephone numbers into the flow meter in decreasing order of importance The modem is capable of speech DISABLE inhibits this function altogether CONDITIONAL lets you program the flow meter to signal these alarms for a variety of reasons You can use rainfall time level flow rate dis solved oxygen pH rate of change a combination of conditions or define the operation through Flowlink software from another computer STORM lets you set the alarm through a combination of rainfall and time You can also program the interval between ca
24. components to dirt and moisture it will also saturate the des iccant canister inside the case very quickly Inspect this canister periodically and recharge it as necessary as described subse quently It is also important to keep the external connectors clean by keeping the mating connectors or the protective caps tightly screwed down Under severe operating conditions you can spray the threads of the connectors with a cleaner lubricant such as Jif or WD 40 to prevent corrosion Be careful not to spray any of the terminals pins or jacks inside the connectors residue from the sprays could cause intermittent or failed connections 5 1 4250 Flow Meter Section 5 Maintenance and Service 5 2 Reactivation of the The 4250 has a reusable desiccant canister held by a steel clamp Desiccators on the inside of the case lid There is also a tubular desiccant car tridge on the top of the case next to the connectors The canister contains silica gel that adsorbs moisture trapped inside the flow meter s case when it is closed This keeps the inside of the case completely dry during shipment storage and use If you leave the case open the desiccant will quickly absorb moisture from the surrounding air and will soon be saturated It will no longer be able to protect the flow meter Both desiccators use a color indi cator that changes from blue to pink or yellow to green when saturated The external desiccant cartridge vents the reference port of the
25. 0 cece eens 2 55 2 4 11 Step 8 Printer serii seise tech ceeds ah alee ea dee Gite els aa Ss 2 57 2 4 12 Step 9 Reports History 0 0 ccc een eens 2 59 2 4 13 Flow Meter History Contents 0 eens 2 61 Section 3 Installation 3 1 Preparation for Use norae Ter e E A eee ee eA A ts es 3 1 4250 Flow Meter Table of Contents vi 3 1 1 Installing the Desiccant Canister 0 cece eee eee eee 3 1 3 1 2 Installing the External Desiccant Cartridge 000 005 3 1 3 1 3 Opening the Cases scssi s ereden esan eee ene e ene a ei 3 3 3 2 Connection to a Power Source 0 cece cee eee eee eens 3 3 3 2 1 Low Power Indication 0 cee cece teens 3 3 3 2 2 Isco Samplers ove oe aa See aai aE feed aed aghat eed ean bebe eae 3 3 3 2 3 Isco Nickel Cadmium Battery 00 000 cece ee ene 3 4 3 2 4 Isco Lead Acid Battery 0 0 cece eee 3 5 3 2 5 AC Power Supplies 0 0 ete a teen eens 3 5 3 2 6 External 12 Volt Direct Current Source 0 c eee eee eee 3 6 3 3 Flow Meter Mounting and Installation 0 0 0 3 7 3 3 1 Carrying Handle t merries un cece eee E tee i 3 7 3 3 2 Location of the Flow Meter 0 0 cece cece eee eens 3 7 3 3 38 Mounting the 4250 0 eee eee neee 3 7 3 3 4 Vent Hose to Desiccant Cartridge 0 cee 3 8 3 4 Quick Disconnect Box orre hirie mirstot eee eee teen e teens 3 9 3 0 Extension Cabl
26. 1 where units of measure are defined will lock out any mention of the other in the menus for the rest of the program The Parameter Modules themselves plug into the Parameter Probe connector on the flow meter N CAUTION The pH and D O probes require continuous submersion after installation or they will lose sensitivity Prolonged dehydra tion of the sensor bulb may damage or even ruin the pH probe The temperature probe is the simplest of the three consisting of a thermistor inside a metal housing The thermistor changes resistance with an increase or decrease in temperature The flow meter converts this resistance change to a temperature reading and displays it in degrees Celsius or Fahrenheit as chosen by menu selection Figure 4 6 Temperature Probe 4 10 pH Probe 4250 Flow Meter Section 4 Options and Accessories The pH probe measures the acidity or alkalinity of an aqueous solution by determining the relative quantity of dissociated hydrogen ions H actually H30 in the solution A larger quantity of H ions indicates acidity while a smaller quantity of H ions indicates alkalinity The H in pH stands for Hydrogen and the p stands for power The normal scale for pH runs from 0 to 14 with 0 being most acidic and 14 being most alkaline Distilled water at 25 C is neutral at 7 based on the fact that the dissociation constant number of H and OH hydroxyl ions present for pure water at that temperature is 1
27. 13 2000 ae William Foster USA Representative a TELEDYNE ISCO A Teledyne Technologies Company William Foster Director of Engineering Teledyne Isco Inc 4700 Superior Street Lincoln Nebraska 68504 Phone 402 464 0231 Fax 402 464 4543 60 3252 017 Rev A Teledyne Isco One Year Limited Factory Service Warranty This warranty exclusively covers Teledyne Isco instruments providing a one year limited warranty covering parts and labor Any instrument that fails during the warranty period due to faulty parts or workmanship will be repaired at the factory at no charge to the customer Teledyne Isco s exclusive liability is limited to repair or replacement of defective instruments Teledyne Isco is not liable for consequential damages Teledyne Isco will pay surface transportation charges both ways within the 48 contiguous United States if the instrument proves to be defective within 30 days of shipment Throughout the remainder of the warranty period the customer will pay to return the instrument to Teledyne Isco and Teledyne Isco will pay surface transportation to return the repaired instrument to the customer Teledyne Isco will not pay air freight or customer s packing and crating charges This warranty does not cover loss damage or defects resulting from transportation between the customer s facility and the repair facility The warranty for any instrument is the one in effect on
28. 3 fuses to see if they are blown see Figure 5 9 10 11 Check the battery or power supply Proper voltage to the unit should be from 10 5 to 14 5 VDC If the unit is powered from the AC supply make sure the branch circuit is delivering at least 110 VAC to the power supply cord Check the wiring harnesses connectors and solder joints Under normal conditions these should stay in good condi tion However physical stress or operation of the unit with the door open or the desiccator saturated could cause corro sion of the connectors in certain atmospheres Look for physical damage Burnt broken or overly hot components stuck or inopera tive switches or water damage may be apparent if you look closely Look for shorted or open diodes and transistors especially driver transistors Check the voltage regulators The output voltage from the regulators should be within 5 of their rated value Check to see that rated voltages are available at various places on the boards Look for excessive current draw from some or all the cir cuitry This will usually be accompanied by an unusual amount of heat coming from some component or group of components and the voltage on the power rails may well be depressed Check the input signals to the unit and see that they are correct This may require the use of an oscilloscope You may need to consult Customer Service for the proper appearance of wave forms
29. 4 6 Isco Flowlink Software 0 0 00 cee e en eens 4 12 4 7 High Low Alarm Relay Box 0 00 ccc cece tne n enna 4 12 ATV Installation ease 6 09 ain a eaan td Gouna VEO EEA Mian welded EEA 4 13 4 7 2 Wiring to a 4200 Series Flow Meter 0 0 0 cece eee eee ee 4 13 4 8 Parameter Sensing with Isco 4200 Series Flow Meters 04 4 13 4 8 1 Installation of Parameter Probes susnnnnnunn nanne eens 4 13 4 9 Temperature Probe duaise naaa a a a aed a Ged ane a OR E a O Ea O 4 14 410 pH Probe 27 oi odie T a fo to E E er E R Se ee E 4 15 4 10 1 pH Probe Calibration 0 00 ete 4 17 4 10 2 pH Probe Installation Guidelines 0 0 0 cee eee eee eee 4 18 4 10 3 Storage and Maintenance of pH Probes 0 000 ee eee 4 20 4 11 Dissolved Oxygen D O Probe 0 00 ccc eee nee nee 4 21 4 11 1 How the D O Probe Works 0 ccc cece 4 22 4 11 2 Probe Preparation 0 0 00 eiia e o iay EE 4 23 4 11 3 Membrane Thicknesses 0000s 4 23 4 11 4 Probe Installation scitera ina E ete nena 4 24 4 11 5 Probe Operation and Precautions 0 00 cee eee 4 24 4 11 6 Calibrating the D O Probe with a Flow Meter 4 26 4 12 Installation of Parameter Probes in Mounting Rings 5 4 27 4 13 The YSI 600 Multiple Parameter Sonde 4 14 Mechanical Totalizer Section 5 Maintenance and Service 5 1 5 2 5 3 5 4 5 5
30. 5 4250 Side View Showing Connectors and Pin Functions 1 7 1 6 Measuring Flow Meter Current 0 cc cee cece ete eee 1 15 2 1 The YST600 S0nde gt a sss o45 464 ees ends Ge ae bea Me bed as GENE DERE 2 8 2 2 Measuring Minimum Depth 0 ccc cette 2 14 2 3 Measuring Offset Distance 0 0c ccc tenes 2 15 2 4 Measuring Level in Round Pipes 0 0 cece eee ene eens 2 44 2 5 YSI 600 Sonde Calibration Flow Chart 20 0 0 eee nes 2 48 3 1 Battery Installed on Flow Meter 0 0 c cee teen eens 3 4 3 2 Power Pack Installed on Flow Meter 0 cc cee annuo nerne 3 6 3 3 4250 Suspended by Handle handles may vary 0 00 e ee eee eee 3 8 3 4 Quick Disconnect Box for the Area Velocity Sensor 0000 cee eee 3 9 3 5 Cable Connections in the Quick Disconnect Box 0 0c cece eee 3 10 3 6 Assembling a Compression Bushing 0 00 cece cence eens 3 11 3 7 Methods of Level Measurement 0 cece eee eee eens 3 15 3 8 Isco Rectangular Mounting Plate 0 0 0 c ccc eens 3 16 3 9 Sensor Installed on a Spring Ring 0 0 eens 3 17 3 10 Scissors Ring Adjustment 0 e ccc eee eee nee 3 19 4 1 Type F Interface for pacing non Isco equipment 020 ee eee 4 8 4 2 Flow meter with front panel removed 0 0 c cee cece ene ee 4 9 4 3 Removing the lower shield 0 0 cece
31. ADVANCE 2 PLACE EMPTY SPOOL ON REROLL ASSEMBLY AND NEW SPOOL ON SUPPLY ASSEMBLY 5 ADVANCE PAPER SO SEVERAL INCHES EXTEND REPLACE BOTH END CAPS FROM PLOTTER 3 FOLD END OF NEW PAPER AS SHOWN AND 6 REINSTALL REROLL ASSEMBLY AND TAPE REINSTALL SUPPLY ASSEMBLY END OF PAPER TO EMPTY SPOOL Figure 5 6 Changing the Chart Paper 5 4 1 Changing the Roll of To change the chart paper you will need Paper e anew roll of paper e a knife or a pair of scissors e a small piece of tape The printer will shut down when the paper runs out The roll is nearly empty when a 1 inch wide pink band appears on the left side of the chart To remove the used roll 1 Locate the handle on the left side of the take up roll 2 Pull straight out on this handle until the take up roll slips off the printer 3 Remove the paper roll from the take up spool by holding the handle in one hand with your thumb pressed against one of the slots in the white end cap 4 Snap the white end cap free from the two black catches on the end of the spool 5 Pull the paper roll off the spool with your other hand 5 8 6 4250 Flow Meter Section 5 Maintenance and Service Remove the feed spool by pulling on the handle extending from the right side of the printer Snap off the other white end cap as described previously Save the white end caps you will reuse them Remove the empty roll from the spool by holding the han dle in one hand and pulling the ro
32. ALTITUDE ALTITUDE UNITS OF MEASURE FT M Then ENTER ALTITUDE ALTITUDE XXXXX FEET or meters Enter the altitude for your location This is critical to the probe s accuracy The following display will then appear WRAP D O PROBE IN MOIST CLOTH PRESS ENTER WHEN STABLE X XXX MG L The reading is in milligrams of oxygen per liter If you chose PPM in program step 1 for D O units the reading would be in parts per million The parameter probes and their carriers snap onto Isco Spring Rings and the base section of Isco Scissors Mounting Rings You can also install them in other ways with custom hardware as is appropriate for your situation For information on the Spring Rings and the Scissors Mounting Ring refer to Section 3 8 The YSI 600 Sonde is a multi purpose water quality mea surement and data collection system It is intended for use in research assessment and regulatory compliance The YSI 600 Sonde can measure the following water qualities e Dissolved Oxygen e Conductivity pH e Salinity e Total Dissolved Solids e Temperature 4 27 4250 Flow Meter Section 4 Options and Accessories Cover removed Temperature to show sensors Conductivity D O sensor _ Inside End view facing sensors Figure 4 11 The YSI 600 Multiple Sensor Sonde The YSI 600 is ideal for profiling and monitoring water condi tions in industrial and wastewater effluents lakes rivers
33. ERROR the following will appear ZERO FLOW ON ERROR YES e NO When the 4250 flow meter cannot obtain a valid flow mea surement it will report an error This option tells the 4250 how to respond to an error measurement The object is to select the option that gives you the greatest overall accuracy Selection of YES will make the 4250 register zero flow until the next valid measurement can be made Selection of NO will make the flow meter continue to use and display the last valid mea surement prior to the ERROR reading An error measurement does not necessarily mean that there was actually no flow It simply means that the flow meter was unable to obtain a valid measurement This can occur when the velocity drops too low to measure or the probe is buried in sludge ZERO FLOW ON ERROR will report errors if the level is below minimum depth Selection of YES or NO depends on your situation If you are running a sampler with the flow meter and velocity is at times so low as to be almost non existent you would probably select YES set flow to zero to prevent the flow meter from tallying unreal istic flow totals to prevent the sampler from taking unrepresen 2 15 4250 Flow Meter Section 2 Programming 2 16 tative samples However if your stream shows continuous flow and the sensor detects an error you would probably select NO use previous reading If you select DO PH READING INTERVAL the following will appear DO P
34. Flow Meter Teledyne Isco cannot guarantee the accuracy of the data Specific questions regarding the use and handling of the products should be directed to the manufacturer listed on the MSDS D 1 4250 Flow Meter Appendix D Material Safety Data Sheets D 2 Distributed by Rainbow Technology Corp 1 800 637 6047 or 205 733 0333 Page 1of3 Product 79355 AAN MATERIAL SAFETY DATA SHEET MULTISORB Effective Date February 14 2009 NY Multieord Technologies Inc MSDS Number M75 Section 1 Product and Company Information Product Name Silica gel indicating Product Use Desiccant absorbent Grades Silica gel indicating Synonyms Amorphous silica gel SiO silicon dioxide amorphous Company Multisorb Technologies Inc Street Address 325 Harlem Road City State Zip Country Buffalo NY 14224 1893 USA Telephone Number 716 824 8900 USA Monday Friday 8 00 5 00 EDT Fax Number 716 824 4091 USA Website E Mail multisorb com Section 2 Hazard Identification Emergency Overview A blue to pink granular material that poses little or no immediate hazard This material is not combustible Potential Health Effects Eyes Dust and or product may cause eye discomfort and irritation seen as tearing and reddening Skin The product dust may cause drying of the skin Silica gel may get hot enough to burn skin when it adsorbs moisture rapidly Use an excess of water to cool the silic
35. If you select CONDUCTIVITY for the parameter to calibrate the following display will appear CONDUCTIVITY CALIBRATION UNITS e MS CM PPT MS CM is milli siemens per centimeter The siemen is the S I Syst me Internationale name for the unit of conductance which is also the reciprocal of the ohm The siemen was formerly called the mho ohm spelled backwards and that term may be more familiar to some PPT is parts per thousand Select the standard most suitable for your application CONDUCTIVITY STANDARD X XX MS CM Then PLACE PROBE IN X XX MS CM PRESS ENTER WHEN STABLE X XX MS CM Then CALIBRATING PLEASE WAIT If you select PPT for the conductivity standard CONDUCTIVITY STANDARD X XX PPT Then PLACE PROBE IN X XX PPT PRESS ENTER WHEN STABLE X XX MS CM Then CALIBRATING PLEASE WAIT There is no need to calibrate the YSI 600 temperature sensor as it is self calibrating 2 47 Sa uol er qijed poog
36. L e NOT MEASURED e If you wish to make use of the YSI 600 sonde s D O measurement capability select MG L Otherwise select NOT MEASURED YSI 600 CONDUCTIVITY PARAMETER eYSI SP CONDe YSI SALINITY YSI CONDUCTIVITY gt For any of the YSI CONDUCTIVITY options if you press Enter the following display will appear TEMPERATURE COEFFICIENT 1 91 This value is provided because conductivity rises 2 C with temperature The default setting is 1 91 This value is the tem perature coefficient for pure KCl potassium chloride in water For other salts this value will be somewhat inaccurate but it does provide a close approximation for solutions of many common salts such as NaCl sodium chloride NH Cl ammonium 2 4 4 Step 2 Flow Conversion Area Velocity Only 4250 Flow Meter Section 2 Programming chloride and sea water If you use the value of 1 91 in most cases you will be able to identify that gross changes are occurring in the ionic content of the stream If you move with the right arrow the following options will appear on the display YSI 600 CONDUCTIVITY PARAMETER e YSI T D S e e NOT MEASURED e T D S stands for total dissolved solids T D S are measured in parts per thousand ppt TDS SCALE FACTOR 0 75 Total dissolved solids are estimated by multiplying conductivity by an empirical factor This factor can vary between 0 55 and
37. These three levels are described in the sample alerts below N CAUTION Cautions identify a potential hazard which if not avoided may result in minor or moderate injury This category can also warn you of unsafe practices or conditions that may cause property damage N WARNING Warnings identify a potentially hazardous condition which if not avoided could result in death or serious injury N DANGER DANGER limited to the most extreme situations to identify an imminent hazard which if not avoided will result in death or serious injury 4250 Flow Meter Safety Hazard Symbols Warnings and Cautions gt gt The equipment and this manual use symbols used to warn of hazards The symbols are explained below Hazard Symbols The exclamation point within the triangle is a warning sign alerting you of important instructions in the instrument s technical reference manual The lightning flash and arrowhead within the triangle is a warning sign alert ing you of dangerous voltage inside the product Symboles de s curit Ce symbole signale l existence d instructions importantes relatives au produit dans ce manuel A AN Ce symbole signale la pr sence d un danger d lectocution Warnungen und Vorsichtshinweise Das Ausrufezeichen in Dreieck ist ein Warnzeichen das Sie darauf aufmerksam macht daB wichtige Anleitungen zu diesem Handbuch geh ren gt gt Advertencias y P
38. a manhole is safe just because there is no odor or the manhole has been entered previously 4 Entering Manholes Since the top of the manhole is usually flush with the surrounding surface there may not be anything for the person who is entering the manhole to grab on to steady himself Persons who are entering manholes should not be per mitted to carry anything in their hands as they enter the manhole to ensure that their hands will be free to hold on or grab if they slip A good method for entering a manhole is to sit on the surface facing the manhole steps or ladder with the feet in the hole and the arms straddling the opening for support As the body slides forward and downward the feet can engage a rung and the back can rest against the opposite side of the opening If there is any doubt about the soundness of the manhole steps a portable ladder should be used A person should never enter a manhole unless he is wearing per sonal safety equipment including a safety harness and a hard hat Two persons should be stationed at the surface continuously while anyone is working inside a manhole to lift him out if he is overcome or injured One man cannot lift an unconscious man out of a manhole The persons stationed at the surface should also function as guards to keep people and vehicles away from 4250 Flow Meter Appendix C General Safety Procedures the manhole opening To avoid a serious injury a person should not be lifted
39. a reserve factor Calculating current draw for a 4250 Flow Meter is somewhat more difficult than calculating the battery capacity You cannot simply measure the idle current of the unit unless the printer and report generator are turned off in the program These func tions require power periodically but not all the time If the figures given in the previous table are not satisfactory for your application you can use the following procedure shown in Figure 1 6 to measure the actual current draw Do not attempt this procedure unless you have the proper equipment available and know how to make electrical mea surements To measure current for a varying load requires a more sophisti cated type of multimeter one that is capable of averaging high and low readings over a period of time The Fluke 87 Multi meter is one example of this type of meter You should set the meter on MIN MAX and let it run with your program for several hours or more Other manufacturers meters are also acceptable but only if they are capable of averaging current draw For a more representative test the area velocity sensor should be attached and submerged in water You should run the test for at least eight hours longer if necessary or until the flow meter has exer cised the entire program The longer you run the test the more accurate the average will be 4250 Flow Meter Section 1 Introduction Fluke 87 or other current averaging meter
40. accordance with the manufacturer s directions may cause interference with radio and television reception There is no guarantee that interference will not occur in a particular installation If this equipment does cause inter ference to radio or television reception which can be determined by turning equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient the receiving antenna on the televi sion e Relocate the unit with respect to the receiver e Plug the unit into a different outlet so the unit and receiver are on different branch circuits e If necessary consult the manufacturer or an experienced radio television technician for additional suggestions You may find the following booklet prepared by the FCC helpful How to Identify and Resolve Radio TV Interference Problems This book is available from the U S Government Printing Office Washington D C 20402 Stock No 004 00 00345 4 4 3 4250 Flow Meter Section 4 Options and Accessories 4 2 Connection to Teledyne Isco offers two serial outputs from 4200 series flow External Serial Device meters There is a software enabled output that is transmitted on the RAIN GAUGE connector This signal also appears on the INTERROGATOR connector This feature lets the flow meter transmit the most recent values for all currently enabled ports as ASCII text You can select the baud rate and the frequency of
41. accurate measurement of the level in the flow stream 4250 Flow Meter Section 2 Programming at the calibration point are essential for accurate flow calculation by the flow meter If you select WEIR the following display will appear SELECT TYPE OF WEIR e V NOTCH e RECTANGULAR e CIPOLLETTI e If you select V NOTCH the following will appear SELECT V NOTCH WEIR ANGLE IN DEGREES 225ee30 e45 060 e 90 120 If you select RECTANGULAR the following will appear END CONTRACTIONS ON RECTANGULAR WEIR e YES e NO e If you select YES the following will appear RECTANGULAR WEIR WITH END CONTRACTIONS ENTER CREST LENGTH XX XXX FEET or meters If you select CIPOLLETTI the following will appear CIPOLLETTI WEIR ENTER CREST LENGTH XX XXX FEET or meters If you selected FLUME for the type of standard device the fol lowing display will appear SELECT TYPE OF FLUME e PARSHALL e PALMER BOWLUS e e LEOPOLD LAGCO e Also available with the arrow key SELECT TYPE OF FLUME e HS ee Hee HL e TRAPEZOIDAL e If you select PARSHALL the following will appear SELECT PARSHALL SIZE ofr ee 2 eo3 eeG ee9Q eo 1 0 eo 15 e 20 e If you press the right arrow key several times the sizes shown below will move onto the screen SELECT PARSHALL SIZE eJeefoebdiceGieeGiece ieee If you select PALMER BOWLUS this will appear SELECT PALMER BOWLUS SIZE egreeG
42. and Accessories telephone company will provide advance notice in order for you to make the necessary modifications in order to maintain uninterrupted service If trouble is experienced with this equipment please contact the Teledyne Isco Customer Service Department 800 228 4373 or outside the U S A call 402 464 0231 for repair and or warranty information If the trouble is causing harm to the telephone network the telephone company may request you remove the equipment from the network until the problem is resolved The following repairs can be done by the customer None This equipment cannot be used on telephone company provided coin service Connection to Party Line Service is subject to state tariffs When programming and or making test calls to emer gency numbers Remain on the line and briefly explain to the dispatcher the reason for making the call Perform such activities in the off peak hours such as the early morning or late evenings The 4200T Modem is compatible with standard telephone lines and comes with a 12 foot cable The cable connects the flow meter s Modem connector to a standard telephone jack type USOC RJ11C supplied by the phone company You must mount the flow meter within 12 feet of this jack We are required by the FCC to provide the following notice This equipment generates and uses radio frequency energy and if not installed and used properly in strict
43. and then immediately starts over again plotting on the left side This step lets you program the flow meter to print out regular reports on the internal printer The reports the flow meter prints are a summary of activity the unit records over a period of time Typically included are such items as maximum and minimum flow rates the time they were reached sample records etc The flow meter lets you create two separate reports and lets you define what appears on them to a great extent Note that the con tents of the reports are defined in Setup in step 1 Step 9 merely lets you turn them off and on and set the timing You can define the start time the interval between reports and other aspects of the report History provides a record of changes made to the flow meter s program or operation events As many as 50 changes can be stored in the flow meter s memory at a time The memory can store up to 50 history items and 200 sample events at a time Following are the program screens as they appear on the display of a 4250 Flow Meter Explanations of most of the screens will be provided Some items that appear in the menus have parentheses around them This means that the item may or may not appear on your flow meter Choices made from the beginning of the program will make some options unavailable later An example of this is the pH D O option Selection of one in Step 1 will keep the other from appearing in all following menus
44. both the external con verter and the internal board you can have a total of four current loops controlled by the same flow meter The internal current loops are brought out to a 6 pin M S connector in the slot where the Modem connector is usually mounted 2 19 4250 Flow Meter Section 2 Programming 2 20 To activate the internal analog output s return to the main screen and press 4 2 0 ANALOG CAPABLE 0 TO DISABLE OUTPUTS 38 EXIT PROGRAM WHEN DONE Additional information for the internal analog output board including specifications for the loops is found in Section Additional information for the internal analog output board including specifications for the loops is found in Section 4 3 2 N CAUTION Each 4 20 mA output represents a constant drain on the flow meter of at least 16 mA whether activated or not While 4 20 mA applications are generally made in installations with com mercial power available Teledyne Isco suggests the following for those who have a 4 20 mA output in a battery powered installation Use with battery powered flow meters only e lf the battery is continuously on charge for example with a Solar Panel Battery Charger e If the battery is very large such as a deep cycle or marine type battery or an Isco 55 Ampere hour lead acid battery e Use only one 4 20 mA output e Keep in mind that programming choices also affect power consumption Use minimum settings on t
45. but installed in an environment where the lighting is poor CONTINUOUS will cause the backlight to be lit continuously Where the flow meter is powered by an AC power supply battery life considerations do not intervene If the backlight makes the display easier to read use it Do not use CONTINUOUS in any installation that is battery powered as it will cause rapid dis charge of the battery OFF will keep the backlight feature turned off under all circum stances Select this option for maximum battery life in installa tions where there is sufficient ambient light to read the display without the backlight feature Press Enter The SETUP menu will return This time move the flashing cursor from LCD BACKLIGHT to LANGUAGE When LANGUAGE appears on your display you may select an alternate language for programming The other language depends on how the flow meter was ordered The following display will appear LANGUAGE e ENGLISH second language as ordered e Select the language appropriate for your application The menus and the printed reports will appear in the selected language Press Enter The SETUP menu will reappear This time select PROGRAM LOCK from the menu Press Enter PROGRAM LOCK ONe OFF PROGRAM LOCK keeps the program from being changed Select OFF while you are programming and then go back and select ON if you need to lock the program At that we suggest using the lock only if there are compelling secu
46. cause it to give false readings In such cases you may need to remove the probe and clean it Low Profile Sensor Figure 1 3 Low Profile Area Velocity Probe lt O gt q lt Area Velocity Particles or Sensor Air Bubbles N Flow A e E Figure 1 4 Operation of the Area Velocity Sensor 1 5 4250 Flow Meter Section 1 Introduction 1 6 Software Upgrades 1 7 Controls Indicators and Connectors 1 8 Technical Specifications CAUTION If you disassemble the AV sensor for cleaning do not touch the exposed metal diaphragm inside the probe with either tools or your fingers The diaphragm is very fragile Deforming it even slightly may place a permanent offset on the transducer ruin ing it and the rest of the sensor Use only gently running water to clean the probe See Section 5 for information on cleaning the pressure trans ducer The velocity sensing circuitry is sealed inside the housing and is not serviceable 4200 Series Flow Meters can be upgraded without being returned to the factory or having the EPROM replaced With Flash memory software updates can easily be installed in the field with a disk a computer and a cable Flash update instruc tions can be found in Section 5 Maintenance For more infor mation about installing software upgrades in the 4250 Flow Meter contact your Teledyne Isco representative or call the factory The controls indicators and connectors of the 4250 Flow Me
47. current draw Maximum settings are those requiring the highest current draw Your program should draw somewhere between the two It is not possible to calculate the current draw for every possible program com bination 2 The default settings are the program entered at the factory You can reset the flow meter to the default program at any time by pressing the 1 and CLEAR ENTRY keys at the same time 3 The nickel cadmium battery has a capacity of 4 0 ampere hours at room temperature 20 C 4 The lead acid battery has a capacity of 6 5 ampere hours at room tem perature 20 C Both batteries are assumed to be fully charged with at least 95 of rated capacity and in good condition These calcula tions also assume a 5 safety factor at the end of discharge Lead acid batteries should never be completely discharged 5 All fractional times are rounded down 1 9 How to Make Battery Calculations 4250 Flow Meter Section 1 Introduction To calculate battery life expectancy for an installation you must know two things e The capacity of the battery you are using e The average current draw of the flow meter or other device powered Battery capacity is expressed in ampere hours The battery man ufacturer provides this information for each battery This value is the product of a load current times an arbitrary time period ten hours for nickel cadmium batteries and twenty hours for lead acid types The termina
48. date of shipment The warranty period begins on the shipping date unless Teledyne Isco agrees in writing to a different date Excluded from this warranty are normal wear expendable items such as pH sensors charts ribbon lamps tubing and glassware fittings and wetted parts of valves and damage due to corrosion misuse accident or lack of proper maintenance This warranty does not cover products not sold under the Teledyne Isco trademark or for which any other warranty is specifically stated No item may be returned for warranty service without a return authorization number issued by Teledyne Isco This warranty is expressly in lieu of all other warranties and obligations and Teledyne Isco specifically disclaims any warranty of merchantability or fitness for a particular purpose The warrantor is Teledyne Isco 4700 Superior Lincoln NE 68504 U S A This warranty applies to the USA and countries where Teledyne Isco does not have an authorized dealer Customers in countries outside the USA where Teledyne Isco has an authorized dealer should contact their Teledyne Isco dealer for warranty service Before returning any instrument for repair please call fax or e mail the Teledyne Isco Service Department for instructions Many problems can often be diagnosed and corrected over the phone or by e mail without returning the instrument to the factory Instruments needing factory repair should be packed carefully and shipped t
49. een eens 4 10 4 4 Type E modification 0 0 cee nents 4 10 4 5 674 Tipping Bucket Rain Gauge 0 0 ccc teens 4 11 4 6 Temperature Probe lt isa sich ee ied Sabie la ea baie oes Bea a aira 4 15 4 7 pH Probe with protective cap 0 0 ce eee eens 4 16 4 8 pH Parameter Module 0 0 cece een tenes 4 19 4 9 The D O Probe risu nesnenin maea via RE elas aia dank ide E EE DR 4 22 4 10 D O Parameter Module 0 0 cece eee eens 4 26 4 11 The YSI 600 Multiple Sensor Sonde 0 0 cece tenes 4 28 5 1 Location of the Desiccant Cartridge 0 0 cece teens 5 3 5 2 Standard AV Probe with Mounting Plate 0 0 0 cece cee eee 5 6 5 3 Standard AV Probe Protective Disk Exposed 0 0 00 e cee nnne 5 6 5 4 Low Profile AV Probe Without Mounting Plate 0 0 0 0 eee eee 5 6 5 5 Low Profile Probe With Transducer Housing Revealed 055 5 7 5 6 Changing the Chart Paper 0 c cece cee e nee n eens 5 8 5 7 Changing the Ink Ribbon 0 cette ene 5 10 5 8 Lifting the Flow Meter from the Case 0 0 cee tenes 5 12 5 9 Location of the Three Fuses 0 0 cece eee ence eee 5 13 5 10 Open the software update program 0 ccc eects 5 18 4250 Flow Meter Table of Contents List of Tables 1 1 4250 Controls Indicators and Connectors 0 00 cece eee eee 1 8 1 2 4250 Technical Specifications
50. extend the distance to 50 feet 15 3 m if you use the optional 25 Foot Extension Cable Connecting two extensions together lets you increase the distance to 75 feet 22 8 m Do not exceed 75 feet with the extensions this will slow the response of the sensor to level and atmospheric changes For distances from 75 to 1 000 feet 304 8 m use the optional Quick Disconnect Box Distances greater than 1 000 feet are not recommended Details on the extension cable and Quick Dis connect Box can be found in Section 4 The 4250 does not have any special requirements for mounting You can locate it on any relatively flat surface either horizontally supported by the two mounting pads and the stainless steel mounting bracket or vertically supported by the two plastic rails on the bottom of the case 3 7 4250 Flow Meter Section 3 Installation You can also panel mount the flow meter using the mounting bracket on the top rear of the case or suspend it from a ladder rung using the optional suspension bracket To use the bracket the carrying handle should first be installed on the flow meter as described above Then slip the handle through the suspension bracket Figure 3 3 4250 Suspended by Handle handles may vary 3 8 3 3 4 Vent Hose to Desiccant Cartridge If you suspend the flow meter above the flow stream and there is any possibility of accidental submersion attach several feet of vinyl tubing to the open vent on the end of t
51. flow meter will turn the sampler off and on repeatedly causing a condition known as chattering that would result in very erratic operation of the sampler With hysteresis you can enter a value that will keep the flow meter from responding to insignificant changes in the enabling condition You should select a value for hysteresis that is narrow enough to allow the flow meter to respond to any serious change but broad enough to ignore minor changes that could cause chat tering Press Enter and the following will appear VELOCITY ENABLE ALARM HYSTERESIS XX XXX FT S or meters second Press Enter again and the following will appear FLOW RATE ENABLE ALARM HYSTERESIS XX XXX CFS or other units of measure The next three menus may or may not appear depending on other selections you make in Program They concern alarm enable hysteresis set points for parameter sensing tem perature pH D O and the YSI 600 Sonde outputs If you want to set hysteresis for any of these items you should enable them when you work through the program section then re enter the Setup section Hysteresis and they will appear Note that you can have temperature alone or temperature with either pH or D O but you must have temperature with either pH or D O You cannot have pH and D O at the same time and selection of one will prevent the other from appearing on the menus later The following will appear if you are measuring temper
52. for the rest of the program and you will not be able to activate that process or function later on unless you reprogram step 1 If there is a feature or option you need that does not appear on your display when the manual says it should return to step 1 and make sure you have not inadvertently left it turned off in either the Program or Setup menus Note that selecting some features automatically excludes oth ers For example selection of pH or D O excludes the other parameter unless you use the YSI 600 Multi Parameter Sonde which measures pH D O and conductivity at the same time Step 1 Operating Mode determines how you set up the flow meter In this step there are two choices Program and Setup Program advances you to step 2 and from there on you cor relate the flow meter to the flow stream Setup selects various basic housekeeping features for the flow meter Here you determine the internal clock site identification measurement setup hysteresis report contents operation of the display back light and program lock In Program you select the units of measure the flow meter will use for the display calculations and reports This method keeps program size manageable and makes pro gramming more efficient By turning off unneeded features of the program early you do not have to keep de selecting those fea tures over and over as you work through the program Consequently you should choose carefully from the first
53. four Phillips screws on the front panel Care fully pull the panel away from the case to access the inte rior 2 Remove the lower metal shield by sliding it downward freeing the tabs from their slots This exposes the power supply PCB Figure 4 2 Flow meter with front panel removed 4 9 4250 Flow Meter Section 4 Options and Accessories Figure 4 3 Removing the lower shield 3 In the lower right hand corner of the power supply PCB disconnect the red wire s spade connector from J3 and con nect it to J1 A rr Connect to J1 Disconnect from J3 Figure 4 4 Type E modification 4 Replace the metal shield and carefully reattach the front panel to the flow meter case 4 10 4250 Flow Meter Section 4 Options and Accessories 4 5 Tipping Bucket Rain A Tipping Bucket Rain Gauge is available from Teledyne Isco for Gauge use with 4200 Series Flow Meters The gauge connects to the flow meter by a cable terminated in an M S connector This con nector plugs into the Remote Printer Rain Gauge connector on the case A Y connect cable is available that allows use of both the rain gauge and a YSI 600 Multi Parameter Sonde at the same time You can connect extra cable user supplied between the rain gauge and the factory supplied cable as long as you do not exceed a maximum total length of 1 000 feet Use 18 AWG wire or larger Do not cut the M S connector from the cable The rain gauge is factory
54. meter s capability of managing associated equipment through a 4 20 mA current loop The 4 20 mA current loop is a common method used to control industrial processes that are variable rather than just fully off or on At the lower value 4 mA the control is turned off 0 at 20 mA the control is completely turned on 100 In between rates range from 1 to 99 A typical application is a chlorinator which must vary in application of the chlorine gas as the amount of water passing through the system increases or decreases Current ranges other than 4 20 mA are also in use although they are less common than 4 20 mA Examples are 0 20 mA sup ported by the flow meter on the internal card only and for longer current loops 10 50 mA not supported by the flow meter Teledyne Isco offers two different arrangements for the 4 20 mA control circuit You can have either or both with the same flow meter One arrangement requires the use of an external accessory the 4 20 mA Output Interface see Section 4 This module connects to the flow meter and a source of AC power and contains the circuitry necessary to create the 4 20 mA current loop This accessory connects to the flow meter through the Interrogator connector The other 4 20 mA option is a board installed inside the flow meter that contains circuitry for up to three separate isolated 4 20 mA current loops This option can also be ordered with one or two current loops supplied If you use
55. meter accessory package Remove the canister from the flow meter by pulling outward on the spring clamp releasing its hold on the canister Remove the canister and heat it in a vented oven in a well venti lated room at 300 F 150 C for about three hours or until the blue or yellow color returns Do not use a microwave oven the metal case of the canister could cause arcing After cooling rein stall the canister in the flow meter Make sure the window on the side of the canister remains visible Figure 5 1 Location of the Desiccant Cartridge MSDS Material Safety Data Sheets for these chemicals are pro vided at the back of this manual 5 3 4250 Flow Meter Section 5 Maintenance and Service 5 4 CAUTION There have been reports of irritating fumes coming from the desiccant during regeneration While our attempts to duplicate the problem have been unsuccessful we still urge you to use caution e Use a vented oven in a well ventilated room e Do not remain in the room while the regeneration is taking place To regenerate the desiccant cartridge 1 Carefully snap it out of its bracket 2 Pull the silicone tubing from the end of the cartridge 3 Remove one of the end caps from the cartridge by twisting and pour the saturated desiccant into a metal ceramic or other heat resistant container 4 Identify the desiccant and heat it at the proper tempera ture two to three hours or until the blue or yellow color
56. meter history Printer Recording Modes Plotted Linear Data Level flow rate rainfall temperature velocity pH or D O includes totalized flow sampler events 3 different linear plots can be printed at the same time Flowlink Data Storage and Retrieval System Memory Partitions Maximum of 6 user defined memory partitions for level or event storage Data Storage Rate of data storage user selected in 1 2 5 10 15 30 60 or 120 minute intervals Baud Rates Serial connection 300 1200 2400 4800 or 9600 baud Serial connection with the optional internal modem 2400 baud Storage 80 000 bytes apportioned per reading as follows flow 4 bytes level 2 bytes sample 4 bytes pH or D O 1 byte Level Data Level readings are stored as a 16 bit number representing 1mm 0 0394 inch effec tive range is 0 65279 meters 1 9 4250 Flow Meter Section 1 Introduction Table 1 3 Technical Specifications for the Standard AV Sensor Weight Standard Range Extended Range 2 1 Ibs 96 kg 3 9 Ibs 1 8 kg Sensor Dimensions Length 6 6 inches 6 8 cm Width 1 6 inches 4 1 cm Height 1 2 inches 3 0 cm Nose Angle 35 from horizontal Cable Length Standard Range Extended Range 25 ft 7 6 m 50 ft 15 2 m Materials Sensor Polybutadiene based polyurethane stainless steel Cable Polyvinyl chloride PVC chlorinated polyvinyl chloride CPVC
57. mono electrode and the solution slowing or halting the response altogether The pH Sensor operates satisfactorily mounted either horizon tally or vertically in the stream However horizontal mounting is more secure and presents less of a debris trap e Simple suspension of the probe is not recommended particularly in streams of high velocity or those that carry debris If you mount the pH probe vertically mount it securely Do not just hang it from the top of the pipe by its cable Suspending the probe in the stream is not stable For horizontal mounting the probe fastens to a sensor carrier that snap fits to an Isco mounting ring The mounting rings fit various diameters of round pipes 15 diameter and smaller For larger pipes use the Isco Universal Mounting Ring For installation details refer to the instruction sheet supplied with the mounting ring 4 18 4250 Flow Meter Section 4 Options and Accessories The mounting rings are held in place by the outward force of spring pressure in the smaller sizes and by a screw arrangement in the larger sizes After mounting the probe in the ring or strap route the cable out of the stream so it will not trap debris that could clog the sewer Mount the pH Module within 25 feet of the probe but in a location higher than the highest anticipated level for the flow stream The amplifier box is sealed and will withstand tem porary submersion but this should be avoided M Note Do
58. more metal strips that lock together with tabs to form a single assembly There is a base section where the sensors are mounted one or more extension sections usually and a scissors section at the top that expands the entire assembly and tightens it inside the pipe The scissors mechanism includes a long screw that increases the width as it is tightened The assembled rings fit pipe diameters from 16 to 80 Secure the unit in place by tightening the scissors mechanism with a s socket wrench or other suitable tool Ring sections are 040 thick half hard 301 stainless steel sheet All other parts are also stainless steel except for the plastic cable ties in the hardware kit Each extension 1 2 3 and 4 adds 9 0 21 5 31 5 or 41 5 respectively to the circumference of the ring Used alone the base section fits pipe that is approximately 16 to 18 in diameter The 9 0 the smallest extension exists so that in larger pipe sizes where large variations in circumference can occur you can use one or two of these extensions to take up or remove slack to bring the scissors mechanism into a position where it can be effectively tightened 4250 Flow Meter Section 3 Installation Scissors Assembly Base Section Tightening the scissors assembly expands the ring to press firmly against the pipe wall securing the ring Figure 3 10 Scissors Ring Adjustment 3 8 3 Completing the AV Sensor Installation Mounting ring kits
59. piece of tape to attach the end of the new paper to the cardboard tube from the old roll Roll some of the paper onto the spool so that it will wind clockwise facing away from you Then reinstall the take up roll into the top of the printer Be careful to push it all the way back in so that the take up gear on the end of the spool assembly will reen gage When the take up spool is back in place push the Paper Reroll key this will remove any slackness in the paper 5 9 4250 Flow Meter Section 5 Maintenance and Service SPOOL Figure 5 7 Changing the Ink Ribbon 5 10 5 4 2 Ink Ribbon Replacement DETECTING LEVER SPOOL SHAFT PRINT HEAD Ribbon life will vary greatly from one installation to another depending on how often the printer has to print When the char acters on the chart become difficult to read you should replace the ribbon If possible try to replace the ribbon at the same time you change the paper roll as it is easier to replace the ribbon when the roll of paper is out of the way To replace the ribbon 1 2 Turn the unit off If there is paper in the unit pull out the take up spool and unroll enough paper to get it out of the way so you can clearly see the two ribbon spools Each spool has a rib bon detecting lever pressing against the ribbon Note the direction the ribbon leaves the left spool and how it winds onto the right spool Take hold of one of the spools and rotate
60. product and its components are not listed on the NTP or OSHA Carcinogen lists Animal Toxicology Tests for DOT Hazard classification Tests Conducted on finely ground silica gel 1 hour LCso rat gt 2 mg 1 48 hour oral LDs rat est gt 31 600 mg kg 48 hour dermal LDs rabbit est gt 2 000 mg kg Considered an ocular irritant 4250 Flow Meter Appendix D Material Safety Data Sheets Multisorb Technologies Inc Silica gel Indicating February 14 2009 Page 4 of 5 Human Toxicology Silica gel is a synthetic amorphous silica not to be confused with crystalline silica Epidemiological studies indicate low potential for adverse health effects In the activated form silica gel acts as a desiccant and can cause a drying irritation of the mucous membranes and skin in cases of severe exposure Multisorb Technologies Inc knows of no medical conditions that are abnormally aggravated by exposure to silica gel The primary route of entry is inhalation of dust Section 12 Ecological Information Not known to have any adverse effect on the aquatic environment Silica gel is insoluble and non toxic Section 13 Disposal Information Disposal Information If this product as supplied becomes a waste it does not meet the criteria of a hazardous waste as defined under the Resource Conservation and Recovery Act RCRA 40 CFR 261 Materials of a hazardous nature that contact the product during normal use
61. record the totalized flow volume that passes by GAL gallons MGAL millions of gallons CF cubic feet L liters M3 cubic meters AF acre feet VELOCITY UNITS e FT S e M S e NOT MEASURED This step determines the units the flow meter uses to record velocity FT S is feet per second M S is meters per second If you do not want to use this feature you would select NOT MEA SURED For the next several substeps you must have the appropriate sensor attached to the flow meter s Parameter Port or Rain Gauge Port for the Rain Gauge or YSI 600 Sonde to take advantage of the capabilities You can only have D O temper ature pH temperature or temperature alone on a given flow meter unless you use the YSI 600 Sonde The YSI 600 Sonde pro vides multiple outputs simultaneously You can use the Rain Gauge with the YSI 600 sonde if you use a Y connect cable The pH or D O probes do not attach directly to the flow meter as their output signals are very low You must also have the appro priate amplifier box connected between the probes and the flow meter The 270 D O module has been discontinued Probes service kits and accessories are still available to maintain existing field units Remember that programming for one type of sensor will prevent the display of any references to the other in later program steps All sensors but the rain gauge are mounted fully submerged in the flow stream The pH and D O pro
62. reports of all recorded activity at regular intervals The contents of these reports are defined in step 1 If you set up the report generator you can have a report printed anytime by pressing this key The report will cover the time from the last scheduled report up to when you press this key The flow meter will print its next report at the next scheduled time Note that if power fails for five minutes or more the flow meter will print a report when power is restored that will cover the interval between the last report and the time that the power failed The next report will cover the time from the power failure to next scheduled report time Chart Advance Pressing this key causes the paper chart to advance through the printer at the fastest possible speed Nothing will be printed while you are holding this key Chart Reroll It is possible to unroll the chart from the take up roll on the flow meter by pulling it out with your hands Pressing this key lets you rewind the chart onto the take up roll Number keys These keys let you enter numeric values into the flow meter when programming Decimal Point This key lets you enter a decimal point into a numeric value when programming On flow meters equipped with the optional modem only you can use this character as a comma delay when entering dialout numbers Arrow keys These keys referred to as the left and right arrow keys let you select a programming option by moving acros
63. shipped with a small folder containing several replacement mem branes Steps for installing a new membrane 1 Secure the probe body so it is in an upright position You can use a vise adjustable wrench or locking pliers etc whatever is satisfactory Do not apply too much force to the probe body or you will crack it 2 Fill the cavity around the silver anode with electrolyte to the point where any more electrolyte would spill over The liquid should be free of bubbles and should completely cover the tip of the sensor 3 Lightly lay the membrane across the top of the probe If you do this carefully there will be no bubbles under the membrane M Note Handle the membrane material with care touching it at the ends only 4 Place the O ring on top of the membrane generally con forming to the circumference edge of the probe 5 Place the thumb and index finger from both hands opposite each other on the O ring at equal distances 6 Roll the O ring down over the end of the probe being care ful not to touch the membrane where it covers the probe 7 Trim off excess membrane with scissors or a sharp knife Check to see that the stainless steel rod thermistor pro truding below the liquid cup is not covered by extra mem brane M Note There must be no bubbles under the membrane and no creases in it for the probe to function correctly 8 Shake any excess KCI solution from the probe Reinstall the sensor guard K
64. single power source for a flow meter sampler combination always install the power supply on the sampler Teledyne Isco offers a 4 ampere hour 12 volt rechargeable nickel cadmium battery pack to power the flow meter Teledyne Isco packages this battery specifically for use with Isco flow meters and samplers Refer to the Power Products Guide accom panying this manual for detailed information about this battery and the procedure for charging it Attaching the Nickel Cadmium Battery Install the battery on the top of the flow meter case and attach its connector to the 12 VDC connector on the side of the flow meter Place the battery with its cable pointing toward the right side of the cabinet Secure the battery by stretching the two rubber draw catches on top of the flow meter until they slip over the two metal U brackets on the ends of the battery case Then screw the battery connector into the top mating connector on the right side of the flow meter case Figure 3 1 Battery Installed on Flow Meter 3 4 3 2 4 Isco Lead Acid Battery 3 2 5 AC Power Supplies 4250 Flow Meter Section 3 Installation Teledyne Isco also offers a 6 5 ampere hour 12 volt rechargeable lead acid battery to power the flow meter This battery is similar in size to the nickel cadmium battery except somewhat larger reflecting its 50 greater capacity Operation and maintenance of these batteries differs somewhat from that of the nickel cadmium batter
65. the Flow Meter Software Appendix A Replacement Parts and Accessories A l A 2 Replacement Parts 0 0 0 c eects Accessory Options Parts List 0 00 e cence Appendix B Programming Worksheets B 1 B 2 B 3 B 4 B 5 B 6 B 7 B 8 B 9 Setup dy a a eked eG ate eg alee ae ed wees Flow Conversion Area Velocity 000 cee aes Flow Conversion Level to Flow Rate Parameter to Adjust 0 0 0 0 0 cee cee eens Reset Totalizers v si c adie acta oie boner eit Sampler Pacing 0 0c cece cents Sampler Enable 0 0 cc cee cee eee Alarm Dialout Mode 0 0 c ce eee eee Printer Sea hice 2A A SN ee ae eh a Geen B 10 Reports History Appendix C General Safety Procedures C 1 C 2 C 3 Practical Safety Precautions 00000 eee Lethal Atmospheres in Sewers 0 00000 ee eeee Hazardous Gases 00 eee eee eee eee 4250 Flow Meter Table of Contents vii 4250 Flow Meter Table of Contents viii Appendix D Material Safety Data Sheets D OVERVIEW sa ssa aae a a A BeBe be board GRAS Re hudba aa EN D 1 List of Figures 1 1 The 4250 Area Velocity Flow Meter 0 00 cece eect enn 1 1 1 2 Standard Area Velocity Probe 0 0c ccc cette eens 1 4 1 3 Low Profile Area Velocity Probe 0 0 ccc cette eens 1 5 1 4 Operation of the Area Velocity Sensor 0 0 c cece cece eee eee 1 5 1
66. the highest pH value you expect to see in your flow stream Selection depends on the range you would normally see If your stream varies from 6 to 8 pH units you would not want to enter 0 and 14 as limits Chart resolution would be poor You could enter 5 and 9 pH and still have good resolution if there were sharp deviations because of the availability of over ranges Selection of OFF from the INPUT FOR PRINTER LINE menu will leave this line blank Selection of conditions other than pH D O TEMPERATURE or YSI functions will result in a request 2 4 12 Step 9 Reports History 4250 Flow Meter Section 2 Programming that you enter the full scale value for the condition being plotted For example if you selected LEVEL as a condition the following would appear PRINTER LINE A FULL SCALE X XXXX FEET or other units of measure as selected The flow meter automatically goes into over range if the data goes higher than the full scale value you have selected You can easily recognize over range operation by the plotted line running off the right side of the chart and then immediately reappearing on the left side of the chart Because of the over range feature you can set a full scale value that gives you good resolution on the chart At the same time the automatic over range will prevent the loss of recorded data if the plotted line rises past the full scale point For the other conditions the full scale units will be appropria
67. transmission You can then write a simple program to retrieve this data periodically or you can do it interactively using a ter minal program This option SERIAL OUTPUT is discussed in detail in Section 2 Teledyne Isco offers a 300 baud output on the RAIN GAUGE con nector This port provides ASCII level and flow rate data for remote transmission to any ASCII compatible equipment Every 15 seconds the flow meter transmits a line of data which includes level units of level measurement percentage of maximum flow rate maximum flow rate a total flow value units of flow sample number bottle number text time and date If you are using the flow meter with an Isco sampler the data line also includes an indication of a sampling event You can transmit this data line to a computer or to a locally con nected within 250 feet device capable of interpreting serial data such as a video display terminal or a printer The specifica tions for this serial data output are as follows 300 baud 7 data bits 2 stop bits even parity The printed or displayed line con tains 110 characters and will appear similar to the following 01 409F 100 00 2 500 0 CFS 0001533 40CF 0000 90 DEGREE V NOTCH WEIR 000 0 90 04 04 02 31 48 The last two characters not displayed are a CR carriage return and a LF line feed The large gaps between some of the words indicate extra character spaces which are not used in this particular text b
68. values shown on the flow meter Signal Strength Spectrum Strength Velocity Enable Alarm Hysteresis Ft S or Meters Second Level Enable Alarm Hysteresis Feet Or Meters Flow Rate Enable Alarm Hysteresis Units Temperature Enable Alarm Hysteresis Deg F C pH Enable Alarm Hysteresis pH units D O Enable Alarm Hysteresis ss ppm YSI pH Enable Alarm Hysteresis pH units YSI D O Enable Alarm Hysteresis ppm mg L YSI Conductivity Enable Alarm Hysteresis mS cm YSI Temperature Enable Alarm Hysteresis Deg Optional Outputs 4 20 Ma Output Serial Output Alarm Box Mechanical Totalizer Report Setup Report A Flow D O pH YSI 600 Sample History Flow Meter History Level In Report Yes No Velocity In Report Yes No Flow Rate In Report Yes No Rainfall In Report Yes No pH or D O In Report Yes No Temperature In Report Yes No YSI 600 Data in Report Yes No Sample History In Report Yes No Flow Meter History In Report Yes No Report Setup Report B Flow D O pH YSI 600 Sample History Flow Meter History Level In Report Yes No Velocity In Report Yes No Flow Rate In Report Yes No Rainfall In Report Yes No pH or D O In Report Yes No Temperature In Report Yes No YSI 600 Data in Report Yes No B 2 Flow Conversion Area Velocity 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 4250 Flow Meter Appendix B Programming Worksheets Sample Hist
69. vidual circumstances you are in Additional safety consider ations other than those discussed here may be required The following procedures are those used by Black amp Veatch a respected consulting firm and are published here by permission Field personnel must keep safety uppermost in their minds at all times When working above ground rules of common sense and safety prevail However when entering manholes strict safety procedures must be observed Failure to do so could jeop ardize not only your own life but also the lives of other crew members 1 Hazards There are many hazards connected with entering manholes Some of the most common hazards are Adverse Atmosphere The manhole may contain flammable or poisonous gases or the atmosphere may be deficient in oxygen Forced ventilation may be necessary Deteriorated Rungs Manhole steps may be corroded and not strong enough to support a man It may be difficult to inspect the rungs because of poor lighting Traffic Whenever manholes are located in the traveled way barricades and warning devices are essential to direct traffic away from an open manhole Falling Object Items placed near the manhole opening may fall and injure a worker in the manhole Sharp Edges Sharp edges of items in or near a manhole may cause cuts or bruises 4250 Flow Meter Appendix C General Safety Procedures C 2 Lifting Injuries Unless proper tools are used t
70. wet lands estuaries coastal waters and monitoring wells It can be left unattended for weeks at a time with measurement param eters sampled at your selected interval and data transmitted to the flow meter You can use the YSI 600 as deep as 200 feet below the surface or in as little as a few inches of water The fast sensor response of the YSI 600 makes it ideal for vertical profiling Its small size means it can fit inside two inch diameter monitoring wells A Rapid Pulse Dissolved Oxygen Sensor eliminates the need for stirring providing accurate results without an expensive and bulky stirrer Because no stirring is required no supplemental power supply or battery is needed and sensor drift caused by passive fouling is minimized The YSI 600 communicates with any 4200 Series flow meter equipped with suitable hardware and software Data can be exported through Flowlink software for further processing The YSI 600 connects to a modified 9 pin Rain Gauge Terminal on any 4200 Series Flow Meter Operation of the Rain Gauge with YSI 600 is still possible with a special Y connect cable Mod ification of older 4200 Series Flow Meters is possible with changes in connectors and boards For additional information contact Teledyne Isco The YSI 600 is available with a cable 25 feet long to connect to the flow meter The cables are waterproof at the sonde and can be used in lab or field Information about programming the flow meter to use t
71. you enter the telephone numbers for the remote alarms There are five possible telephone numbers in decreasing order of importance You can enter as many as eighteen digits for each phone so the remote targets need not necessarily be local ALARM DIALOUT NUMBERS e DONE e e NUM 1 NUM 2 NUM 3 NUM 4 NUM 5 If you select DONE the flow meter will advance to the next step If you select one of the NUM entries such as NUM 1 the fol lowing will appear FIRST PHONE NUMBER XXXXXXXXXXXXXXXXXX You can enter the phone numbers as straight seven or ten digit numbers or you can use the key to enter a dash You can use the decimal key to enter a comma If you want to signal more than one remote number at a time the numbers are arranged in decreasing priority NUM 1 carries the highest pri ority followed by NUM 2 and so on After you have entered the numbers the flow meter will request DELAY BETWEEN DIALOUTS XX MINUTES This is the time delay between calling the first number and calling the second etc This option gives you time to respond to an alarm before the flow meter dials the next number Select a value between 1 and 99 minutes Then the display will advance to the following CALLBACK TO DISABLE ALARM e YES e NO e Select YES if you want to be able to acknowledge the alarm con dition in the flow meter by calling back No message is spoken on this callback When the fl
72. 0 The dissociation constant is a number indicating the degree of ionic dissociation for a substance after it is dissolved in water Dissociation constants vary widely for substances depending on the nature of the substance s chemical bonds Ionic salts tend to have higher constants Each number on the pH scale between 7 and 0 equals a tenfold increase in H ion Each number between 7 and 14 equals a tenfold decrease of H ion pH measurements of wastewater are commonly made to monitor the effect of treatment chemicals added to raise or lower the pH Water that has been used for various industrial processes may deviate substantially from 7 Chemicals are often added to the water to bring the pH close to that of neutral water which is 7 For example if the effluent has a concentration of heavy metal ions they must be removed before discharge Raising the pH of solutions containing transition metal ions will cause them to pre cipitate where they can easily be removed as sludge The resultant solution will be high in pH and will require acid to neu tralize it 4 15 4250 Flow Meter Section 4 Options and Accessories Figure 4 7 pH Probe with protective cap 4 16 The pH probe is a combination of two electrochemical half cells Together they provide a low voltage signal that corresponds to the hydrogen ion concentration of a solution If you look at the pH probe you will see a glass bulb on one end This is called the gla
73. 0 9 depending on the solubility of the ions in the water and its tem perature YSI 600 TEMPERATURE UNITS e F e e C e e NOT MEASURED e Select the appropriate temperature units Flow conversion is the method the flow meter uses to calculate flow rate from the measurement of the area and velocity of the flow stream Accurate measurements of both area and level are essential for accurate flow compilation See Section 3 6 Area Velocity Sensor Installation The 4250 can calculate flow either through area velocity mea surements and area velocity data points or through level to flow rate conversions using a standard primary measuring device or level to flow rate data points If you wish to use the 4250 with a primary measuring device skip to Step 2 Flow Conversion Level to Flow Rate fol lowing this section FLOW CALCULATION e AREA VELOCITY e LEVEL TO FLOW RATE e If you select Area Velocity the following will appear AREA VELOCITY CALCULATION e CHANNEL SHAPE DATA POINTS e CHANNEL SHAPE uses the shape of the channel to calculate the flow rate DATA POINTS allows you to enter your own mea surements of area and velocity and the flow meter will calculate flow rate based on your data For now select CHANNEL SHAPE 2 33 4250 Flow Meter Section 2 Programming 2 34 After you press Enter the following display will appear AREA VELOCITY CHANNEL SHAPE e ROUND PIPEe eU CHANNEL
74. 009 Bulkhead Nut 49 60 3223 010 Bulkhead Fitting 51 60 31 13 034 Latch Pin 54 60 3233 139 External Desiccant Tube 60 60 3253 022 Case Top Label 61 60 321 3 060 Printer Label 62 60 3253 023 Connector Label 63 68 4250 007 Replacement Door 64 60 3213 260 Window Gasket 65 60 3213 261 Door Gasket 4250 Flow Meter Appendix A Replacement Parts and Accessories Table A 1 Replacement Parts List Continued No Part Number Complete Parts Description 66 202 4001 14 O Ring Silicone 114 0 61ID x 0 1 W 67 202 4001 18 O Ring Silicone 118 0 86 ID x 0 1 W 68 202 4001 20 O Ring Silicone 120 0 99 ID x 0 1 W 69 60 3214 141 Case Latch Assy 75 109 0605 03 Draw Latch Assy Small 76 109 0609 00 Cabinet Catch Nylatch Model 135 77 142 2001 00 Component Holder 3 4 x 11 4 78 142 2003 00 Component Clip 3y 79 149 1000 00 Amp Dust Cover 9760 10 80 149 1001 00 Amp Dust Cover MS9760 14 81 149 1001 01 Amp Dust Cover 9760 16 85 202 1000 14 O Ring 014 88 209 0166 65 Elbow Nylon 1 8 NPT to 1 4 ID 115 239 0416 32 Sheet Edge Fastener 6 32 116 231 0197 04 SST MS 10 32 x 1 4 PH Self Seal 118 60 1704 017 Strap Assy 119 099 0012 00 Dri Can Desiccant Canister Not Shown A 5 4250 Flow Meter Appendix A Replacement Parts and Accessories A 2 Accessory Options Parts List 4250 Flow Meter Basic Unit 68 4250 001 Includes Area Velocity Sensor 10 range 25 cable ccccc
75. 1 If Serious Problems Occur 5 6 2 Inspection Protocol 4 While still pressing the 4 and Exit Program keys turn the flow meter on again Wait until the display reappears before releasing the keys Pressing 4 and Exit Program may leave some values pro grammed into the flow meter s computer If you want to remove all programmed entries hold down 1 and Clear Entry while powering up the flow meter The following messages describe serious internal problems indi cating service is required ROM CHECKSUM ERROR or FOUND BAD RAM CALL CUSTOMER SERVICE If these messages appear call the Teledyne Isco Customer Service Department at 800 228 4373 N CAUTION Do not attempt to disassemble or repair the 4250 Flow Meter other than changing fuses unless you are skilled in the evalu ation and repair of microprocessor based circuitry Teledyne Isco recommends no attempt be made to disassemble or repair the printer mechanism or display module The electronic circuitry of the 4250 is solid state and its reli ability is high If the unit should fail to operate properly the problem is most likely a mechanical failure Items such as a broken or intermittent connections in the power cable or wiring harness or rarely poor electrical connection through keypad switches should be suspected If you suspect an electronic problem Teledyne Isco recommends that you contact the Technical Service Department Contact information can be found o
76. 2 5 3 4 5 HS Flume Size 0 4 0 5 0 6 0 8 1 0 HL Flume Size 2 0 2 5 3 0 3 5 4 0 Leopold Lagco Flume Size 4 6 8 10 12 15 18 21 24 30 Enter Equation Units Q __ _ H H Q kH kHP 2 B 4 Parameter to Adjust 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 4250 Flow Meter Appendix B Programming Worksheets If your equation does not have a second term kH just enter 0 zero for it Manning Types Round Pipe U channel Rectangular Trapezoid Mann Round Pipe Slope _ ____Rough _ Mann Round Pipe Diameter _ __ Feet or meters Mann U channel Slope _ Rough __ Mann U channel Width __ _ Feet or meters Mann Rectangular Slope _ _ Ss Rough __ Mann Rectangular Width __ __ Feet or meters Mann Trapezoid Slope __ __ Rough _ Mann Trapezoid Top Width __ __ Feet or meters Mann Trapez Bottom Width __ __ Feet or meters Select Data Set One Two Three Four None Level Units For Data Point Entry Ft In M Mm Flow Rate Units GPM GPS MGD CFS CFM MS M H M D LPS CFD GPH AFD CFH CFM MM Set __ 1 4 0 Points Entered Add Point units Set 1 Data Point 1 Enter _ level units _ units of volume Enter data points in the table below If you have multiple data point sets photocopy this table Data Point Set Enter Maximum Hea
77. 4250 Area Velocity Flow Meter Installation and Operation Guide M N TELEDYNE ISCO Everywhereyoulook Part 60 3253 042 of Assembly 60 3254 012 Copyright 1994 All rights reserved Teledyne Isco Revision BB October 11 2013 Foreword This instruction manual is designed to help you gain a thorough understanding of the operation of the equipment Teledyne Isco recommends that you read this manual completely before placing the equipment in service Although Teledyne Isco designs reliability into all equipment there is always the possi bility of a malfunction This manual may help in diagnosing and repairing the malfunc tion If the problem persists call or e mail the Teledyne Isco Technical Service Department for assistance Simple difficulties can often be diagnosed over the phone If it is necessary to return the equipment to the factory for service please follow the shipping instructions provided by the Customer Service Department including the use of the Return Authorization Number specified Be sure to include a note describing the malfunction This will aid in the prompt repair and return of the equipment Teledyne Isco welcomes suggestions that would improve the information presented in this manual or enhance the operation of the equipment itself Teledyne Isco is continually improving its products and reserves the right to change product specifications replacement parts schematics and instruc tions without n
78. 5 6 5 7 5 8 Routine Maintenance and Minor Service 5 1 1 Care of the Flow Meter Case 5 1 2 Care of the Case Seal 0 2 eee eee 5 1 3 Preventing Moisture Damage Reactivation of the Desiccators 0 000 e eee eee 5 2 1 When to Recharge the Desiccant in the Tubes 5 2 2 Regenerating the Desiccant Canister Care of the AV Sensor and Cables 00055 5 3 1 Low Maintenance 0 eee eee 5 3 2 Cleaning the Standard AV Probe 5 3 3 Cleaning the Low Profile AV Probe 5 3 4 Cable Inspection 0 00 e eee eee Maintenance of the Printer 0 0 00 e eee eee 5 4 1 Changing the Roll of Paper 04 5 4 2 Ink Ribbon Replacement 2 000005 5 4 3 Do Not Disassemble or Lubricate the Printer Servicing And Troubleshooting 20055 5 5 1 Disassembling the Flow Meter 5 5 2 Fuse Replacement 0 00 nunne eee 5 5 3 Display Warnings 0 00 c eee eens 5 5 4 System Reset 0 0 cece eens Preliminary Troubleshooting Steps 000 5 6 1 If Serious Problems Occur 00000 5 6 2 Inspection Protocol 0 0 00 eee Precautions for Servicing CMOS Circuitry 5 7 1 Hazard of Static Electricity 04 Software Updates 0 ccc eee nen eee 5 8 1 Updating
79. A A A pi N gt 4 5 75 OF 2 54 II Aire CO UC CR Te On CS Gk Cn 62 A 2 4250 Flow Meter Appendix A Replacement Parts and Accessories ies D gt NG 76 A 3 4250 Flow Meter Appendix A Replacement Parts and Accessories Table A 1 Replacement Parts List A 4 No Part Number Complete Parts Description 1 60 3214 139 Motor Assy Chart Drive 4200 4 60 3214 093 LCD Module Assy B L 5 60 3224 070 Case Bottom Sub Assembly 8 60 3214 098 Keyboard PCB Assembly 9 60 3254 024 4250 CPU CBA w Software 10 60 3254 014 PCB Assembly 4250 Parameter CPU 11 60 3214 120 Harness Assy 12 VDC Sampler 12 60 3214 122 Harness Assy Interrogator 13 60 3214 140 Wiring Assy Rain Gauge Com 1 14 60 3214 125 Harness Assy Parameter 15 60 3254 017 Harness Assy Area Velocity 16 60 3234 022 Supply Spool Assembly 17 60 3234 023 Reroll Spool Assembly 18 60 1874 024 Desiccant Cartridge Assy 28 60 3213 098 Printer Mod 37 60 3213 229 Spool End Cap 39 60 3213 255 Wall Mount 40 60 321 3 259 Window 41 60 9003 031 Connector Hole Plug 42 60 3233 099 Hinge Pin 43 60 3233 106 Desiccant Can Holder 44 60 3233 115 Connector Clip 688 Dia 45 60 3233 116 Connector Clip 813 Dia 46 60 3233 117 Connector Clip 938 Dia 47 60 3253 040 Conn Clip 938 Dia Narrow 48 60 3223
80. BS plastic EPR rubber stainless steel epoxy polyetherimide and the polyurethane cable covering e For correct probe operation the gold cathode must always be bright If it is tarnished which can result from contact with certain gases or plated with silver 4 24 4250 Flow Meter Section 4 Options and Accessories which can result from extended use with a loose or wrinkled membrane you need to restore its surface You can return it to Teledyne Isco or clean it yourself with a probe reconditioning kit This kit is available from Teledyne Isco Never use chemicals or any abrasive not supplied with this kit It is also possible for the silver anode to become contaminated which will prevent successful calibration Try soaking the probe overnight in a 3 ammonia solution then rinse with deionized water recharge with electrolyte and install a new membrane If you are still unable to recalibrate the probe after several hours return the probe to Teledyne Isco for service e Ifthe sensor O ring is worn or loose you should replace it The probe comes with a kit of O rings and replacement membranes Additional replacement O rings are available from Teledyne Isco in an O ring replacement pack e Ifthe probe is not going to be in constant use you should store it in the plastic bottle provided in shipping To keep the electrolyte from drying out place a small piece of moist towel or sponge in the bottle and insert the probe into th
81. FLUKE 87 TRUE AMS MULTIMETER Cc E CC Oo Maca Flow Meter gt E 00 Connect Cable 60 1394 023 or you can make your own Battery 12 Volt 0000 clip A good quality adjustable regulated DC power supply can be substituted for the 12 volt battery The power supply should have at least 3 Amperes output prefer ably more and capable of overcurrent surges Figure 1 6 Measuring Flow Meter Current More information about batteries used to power Isco equipment is available from the Isco Power Products Guide which is shipped with this manual and any flow meter order 4250 Flow Meter Section 1 Introduction 4250 Flow Meter Section 2 Programming 2 1 Getting Started 2 1 1 Operation of the Display You must program the 4250 Flow Meter to accurately monitor a flow stream You must also install the area velocity sensor The 4250 will usually also need a primary measuring device a structure placed across a stream that regulates flow This section describes programming the flow meter with the aid of the keypad and display There are nine program steps that control all aspects of the flow meter s operation Teledyne Isco ships the flow meter with a program already installed that is called the default program You can use this program as an example to see the flow meter s capabilities Note that the default program is just for testing the unit at the factory The flow meter s internal
82. Functions 1 7 4250 Flow Meter Section 1 Introduction Table 1 1 4250 Controls Indicators and Connectors CONTROLS SETTINGS FUNCTION ON OFF On Off Turns the flow meter on and off Internal memory is protected with a standby battery See Section 2 Keypad Momentary 24 key 4 column matrix Program flow meter through series of keystrokes Switches prompted by messages on the display Certain keys perform specific functions printing reports or entering program choices into memory Arrow keys move through menus Number keys enter numeric values See Section 2 INDICATORS READING FUNCTION Display Multi function 2 line 40 characters per line liquid crystal display LCD Prompts you through program procedure displays total flow present flow rate and level May also display parameter readings if sensors present Internal Plotter Various Provides hard copy of total flow level or flow rate variation over time provides sampling information and a printout of the program Prints reports Generates up to 3 different linear data plots Chart characters and plots are generated on plain paper roll with an ink ribbon CONNECTOR TYPE FUNCTION 12 VDC 2 pin male M S Connects 12 VDC power to flow meter Sampler 6 pin male M S Connects flow meter to sampler Provides 12V flow pulse to sampler pulse width 78 ms Receives sampler bottle number composite sample and event mark signal Rain Gauge 9 p
83. H READING INTERVAL e CONTINUOUS 15 SEC 30 SEC 1 MINe 2 MIN 5 MIN 9 Again this selection is offered as a means of saving battery power After selecting the appropriate parameter reading interval press Enter The Setup menu will reappear This time select YSI 600 READING INTERVAL from the menu The fol lowing display will appear YSI 600 READING INTERVAL CONTINUOQUS 15 SEC e30 SECee1 MINee2 MINeeS MINe After selecting the appropriate parameter reading interval press Enter The Setup menu will reappear This time select STATUS from the Setup menu Press Enter The following will appear MODEL 4250 HW REV XXXXXX SW REV X XX ID XXXXXXXXXXX HW REV refers to the hardware revision number SW REV refers to the software revision number ID is an identification number for the flow meter If you press Enter again you will see the following display SIGNAL STRENGTH X SPECTRUM STRENGTH X This value indicates the functioning of the area velocity sensor The flow meter goes into the continuous reading mode whenever this screen is displayed This display exists primarily as a diagnostic tool for telephone troubleshooting There is no magic number you should expect to see If the flow meter is displaying valid level flow readings you do not need to worry much about the numbers The numbers become important when you cannot get valid level flow readings You can
84. ITE J ORANGE AMS INN Figure 3 5 Cable Connections in the Quick Disconnect Box 3 10 The wire colors shown are for the Teledyne Isco supplied custom cable You must use the Isco cable because the connector at the flow meter end of the cable is special and not available else where When you wire the cable inside the Quick Disconnect Box attach each wire to the terminal that has the same color wire soldered to it Mount the Quick Disconnect Box with screws through the holes in the stainless steel backplate The connector on the AV sensor cable connects to the mating connector on the side of the Quick Disconnect Box If you use the cable without conduit you must install a com pression bushing on the cable to make a water tight connection A picture of the compression bushing is on the next page If you run the wiring inside conduit liquid tight fittings are needed To min imize the effects of corrosion we suggest the use of non metallic conduit if permissible The desiccant cartridge on the bottom of the Quick Disconnect Box provides the atmospheric reference to the sensor s pressure transducer If there is any chance of submersion of the Quick Dis connect Box attach vinyl tubing to the desiccant cartridge and route it to a place well above the maximum expected liquid level When you have completed the wiring inside the box replace the cover and tighten the screws that hold the cover securely to prevent the possibility of any
85. Installation and options application specific to the 4250 Section 4 Options and accessories available for all 4200 Series Flow Meters Section 5 Routine maintenance and minor service Following Section 5 are appendices covering replacement parts and accessories programming worksheets safety information and material safety data sheets Figure 1 1 The 4250 Area Velocity Flow Meter 1 1 4250 Flow Meter Section 1 Introduction 1 1 Description The 4250 Area Velocity Flow Meter uses a sensor with two dif ferent sensor systems submerged in the flow stream This probe is called the area velocity or AV probe It contains a pressure transducer to measure level and a pair of ultrasonic transducers to measure velocity The flow meter then calculates flow based on the cross sectional area of the flow stream and its velocity You need only enter the dimensions of the flow channel If you want you can also use the 4250 with a primary measuring device as it has built in standard level to flow conversions that cover most open channel flow measurement situations You can enter an equation or sets of data points that plot a user derived flow profile for a flow stream You can enter either velocity data points or level flow rate data points The 4250 supports Flowlink Teledyne Isco s data acquisition storage and retrieval software Using Flowlink the 4250 has enough memory to store 40 000 data readings The optional 4200T Modem with sp
86. L refers to the YSI 600 Sonde The flow meter can measure several different aspects of the stream at the same time including pH D O temperature plus conduc tivity If you select LEVEL READING INTERVAL the following will appear LEVEL READING INTERVAL e CONTINUOUS 15 SEC 30 SEC 1 MINe 2 MIN 5 MIN 9 The LEVEL READING INTERVAL option is a way to conserve power in battery powered installations If your installation is AC powered you can simply select CONTINUOUS Consid erable power is expended in generating the ultrasonic pulses in the level sensor Select the longest acceptable interval between readings if oper ating on battery power If you need a faster response time select one of the shorter intervals If operating on battery power you may have to seek a compromise between short reading intervals and battery life expectancy If you select VELOCITY READING INTERVAL the following will appear VELOCITY READING INTERVAL e CONTINUOUS 2 MIN 5 MIN e 15 MINe 30 MIN Returning to the MEASUREMENTS menu if you select MINIMUM DEPTH the following will appear MINIMUM DEPTH FOR VELOCITY MEASUREMENT e 2 IN 50 MMe e 3 IN 75 MMe e 4 IN 100MMe Standard and Extended Range Sensors Three selections are available for the minimum depth for velocity measurements 2 3 or 4 inches 50 75 or 100 mm The Minimum Depth is the minimum amount of water above the bottom of the se
87. LESS THAN RATE OF CHANGE e After you select one of these options the flow meter will request that you enter a value for example if you selected GREATER THAN LEVEL GREATER THAN X XX FEET or other units of measure Enter a maximum value for the selected condition which if exceeded will enable the sampler If you select LESS THAN the flow meter will ask you to enter a minimum value for the selected condition If the condition falls below that value later the flow meter will enable the sampler If you select RATE OF CHANGE the flow meter will ask you to enter two values one for the condition and the other for a period of time over which the change occurs 2 53 4250 Flow Meter Section 2 Programming 2 54 After you have determined what condition will signal the sampler and under what circumstances the following menu will appear SELECT OPERATOR e DONE OR e AND This step allows you to trigger the sampler from a single con dition or from two conditions Suppose you wanted to trigger the sampler from only one condition and that condition was level You would select level as the condition and then identify what change in level would be the trigger Then you would select DONE for the SELECT OPERATOR step Selection of DONE will advance the flow meter to the next program step Selection of OR or AND will allow you to select another condition and then determine whether both conditions are nec
88. LOW METER HISTORY to appear in the report FLOW METER HISTORY is a list of the changes that have been made to the flow meter s program Press Exit to leave the program Then press Enter and reselect SETUP The Setup menu will reappear SETUP OPTIONS EXIT TO QUIT e STATUS REPORT SETUP e e LCD BACKLIGHT e SET CLOCK SITE ID MEASUREMENT SETUP PROGRAM LOCK PROGRAM are off screen and can be reached with the arrow keys Select LCD BACKLIGHT with the arrow key Press Enter The following will appear LCD BACKLIGHT MODE e KEYPRESS TIMEOUT e e CONTINUOUS OFF e 4250 Flow Meter Section 2 Programming KEYPRESS TIMEOUT will cause the backlight to be turned on whenever you press a key on the keypad other than On and Off An internal timer is started that will keep the backlight on for approximately two minutes after you press a key Each time you press a key the timer is restarted so the backlight will never go off as long as you continue to program the flow meter with keystrokes coming less than two minutes apart At the end of programming the backlight will go out and will stay out until you start to program again This feature is designed to conserve battery power by de ener gizing the backlight when it is not needed The backlight is still available if it is necessary to program in a dark environment such as a manhole We recommend using this selection if the flow meter is battery powered
89. M the flow meter will request definitions similar to those for STORM in sampler enable The following will appear LEVEL GREATER THAN X XXX FT or other units of measure Then RAINFALL AMOUNT X XX INCHES or other units of measure Then RAINFALL TIME PERIOD 15MIN 30 MINee1 HRe 2HRe 4HRe If you press the right arrow key several times the following times will appear RAINFALL TIME PERIOD 6HR e S8HRee 12HRe 24 HR 48 HRe 72 HRe 2 55 4250 Flow Meter Section 2 Programming 2 56 The intervals above are the periods of time over which the rainfall occurs The amount of rain entered in the previous step and detected by the rain gauge must fall during the time interval chosen from this menu before the flow meter recognizes the event as a storm The next menu defines the interval that must pass between storm events TIME SINCE LAST RAINFALL DAYS X allowable entry of 1 7 If you select CONDITIONAL for alarm dialout the following will appear CONDITION e LEVEL VELOCITY FLOW RATE D O pH TEMPERATURE RAINFALL YSI pH YSI DO YSI CONDUCTIVITY and YSI TEMP may also appear As men tioned previously some of these menu options may not appear depending on selections you made earlier in the program At least one of the options will be available to you As mentioned for other program steps some of these menu options may not app
90. O Model String Tl Time since 1900 Days BV _ Battery Voltage Volts LE Level Meters LSI Level Signal Strength 0 100 FL Flow Cubic meters per second VO Volume Cubic meters FV Forward volume Cubic meters RV Reverse volume Cubic meters SV___ Sampler Enabled Volume Cubic Meters RA Rain rolls over every 255 tips Tips CR Current day s rain tips since Tips midnight PR Previous day s rain tips since Tips midnight PH pH pH units DO Dissolved Oxygen Milligrams per liter TE Temperature Degrees Celsius YPH YSI 600 pH pH units YDO YSI Dissolved Oxygen Milligrams per liters YCO YSI 600 Conductivity Millisiemens per centimeter YSP YSI 600 Specific Conductance Millisiemens per centimeter YSA YSI 600 Salinity Parts per thousand YTD YSI 600 Total Dissolved Solids Milligrams per liter 4250 Flow Meter Section 2 Programming Table 2 1 ASCII Output Codes Continued Code Parameter Units YTE YSI 600Temperature Degrees Celsius YSP YSI 600 Specific Conductance Millisiemens per centimeter YCO YSI 600 Conductance Millisiemens per centimeter YSA YSI 600 Total Salinity Parts per thousand YTD YSI 600 Total Dissolved Solids Milligrams per liter YTE YSI 600 Sonde Temperature Degrees Celsius SS Sampler Enable Status Logical B Bottle Number and Time Days CS Check sum does not include Unsigned long the check sum carriage return and line feed
91. OF LEVEL MEASUREMENT e FT o N e M o e MM e NOT MEASURED e Selection of feet inches meters or mm depends on your situ ation You would select NOT MEASURED if you were using the flow meter for some other form of sensing only such as pH or temperature Press Enter The following will appear You will have to press the right arrow key several times to see all of the options displayed in the following menu FLOW RATE UNITS OF MEASURE e GPS GPM GPH MGD CFS CFM CF Pressing the right arrow key several times will move other units onto the display FLOW RATE UNITS OF MEASURE e eCFH CFD LPS M3S e M3M M3H M3D AFD 4 NOT MEASURED will also appear if you keep moving with the right arrow key This step establishes the units of measure the flow meter will use in all subsequent displays and calculations 4250 Flow Meter Section 2 Programming GPS gallons per second GPM gallons per minute GPH gallons per hour MGD millions of gallons per day CFS cubic feet per second CFM cubic feet per minute CFH cubic feet per hour CFD cubic feet per day LPS liters per second M3S cubic meters per second M3M cubic meters per minute M3H cubic meters per hour M3D cubic meters per day AFD acre feet per day TOTALIZED VOLUME UNITS GAL MGAL CFeeLe M3eeAFe This step determines the units value the flow meter will use to
92. ON Before any flow meter is installed the proper safety precau tions must be taken The discussions of safety procedures pro vided in the back of this manual are only general guidelines Each situation in which you install a flow meter varies You must take into account the individual circumstances of your installation Additional safety considerations other than those discussed may be required To help carry or suspend the flow meter a handle is provided in the accessory package To use the handle clip the hooks at both ends onto the two metal brackets at the top of both side of the case Because the flow meter uses an AV sensor for flow measurement you do not have to install it directly above the measurement point or even particularly close to the flow stream You can install the flow meter in a convenient protected location and route the AV sensor cable to the place where the level sensor is mounted For example you can install the flow meter above ground for protection and easy accessibility and then you only need to enter the manhole for sensor installation and calibration and occasionally thereafter for maintenance and inspection You will need to mount the unit within 25 feet 7 6 m or 50 feet 15 3 m with the 30 foot sensor if you connect the sensor directly to the flow meter WARNING The 4250 Flow Meter has not been approved for use in hazardous locations as defined by the National Electrical Code You can
93. R for the Manning flow conversion the following displays will appear MANNING RECTANGULAR SLOPE X XXXXX ROUGH X XXX 2 39 4250 Flow Meter Section 2 Programming 2 40 Slope and roughness are entered the same as for ROUND PIPE previously Then MANNING RECTANGULAR WIDTH X XXX FEET or meters If you select TRAPEZOID for the Manning flow conversion the following displays will appear MANNING TRAPEZOID SLOPE X XXXXX ROUGH X XXX Slope and roughness are entered as for ROUND PIPE previ ously Then MANNING TRAPEZOID TOP WIDTH X XXX FEET or meters Then MANNING TRAPEZOID BOTTOM WIDTH X XXX FEET or meters Returning to Step 2 FLOW CONVERSION TYPE if you select DATA POINTS the following will appear SELECT DATA SET e ONE TWO e THREE e e FOUR e e NONE Then LEVEL UNITS FOR DATA POINT ENTRY eFTeeiINeeMeeMMe This allows you to enter data points that are in different units than what you are using Then FLOW RATE UNITS e GPM e GPS e e MGD e CFS e e CFM M3S e M3H M3D If you press the right arrow key several times the following units will appear on the display FLOW RATE UNITS LPS CFD GPH AFD CFH CFM M3M GPM gallons per minute GPS gallons per second MGD million gallons per day CFS cubic feet per second CFM cubic feet per minute M3S cubic mete
94. RECTANGULAR e gt You will have to use the arrow key to bring TRAPEZOIDAL onto the screen Select ROUND PIPE Where the program requests the dimension of a channel mea sure the channel for accuracy Do not rely on nominal dimen sions or specifications Press Enter The following will appear VELOCITY ROUND PIPE DIAMETER X XXX FT or meters If you select U CHANNEL the following will appear VELOCITY U CHANNEL WIDTH X XXX FT or meters If you select RECTANGULAR this will appear VELOCITY RECTANGULAR WIDTH X XXX FT or meters If you select TRAPEZOIDAL this will appear VELOCITY TRAPEZOID TOP WIDTH X XXX FT or meters Press Enter The following display will appear VELOCITY TRAPEZOID BOTTOM WIDTH X XXX FT or meters Exit the program Re enter and advance to the AREA VELOCITY menu as follows AREA VELOCITY CALCULATION e VELOCITY e DATA POINTS e This time select DATA POINTS Press Enter The following display will appear DATA POINT SET e ONE e e TWO e THREE e FOUR e e NONE In general the option of NONE will not show up on the display For the 4250 you can define the four sets of data points as either level to flow rate data points or level to area data points Level to area data points are used in 4250 applications where the channel has an unusual or non standard shape If for example you had defined all four
95. ROBE AND PLACE IN 7 0 pH SOLUTION PRESS ENTER WHEN STABLE X XX pH When you have entered this second value the pH probe calibration is complete You can then install the probe in the flow stream M Note An asterisk may occasionally appear next to the pH reading for approximately 30 seconds during which time the most recent reading will be displayed This may be normal flow meter operation due to other internal functions or could inicate pH fluctuation in the stream 4 10 2 pH Probe Installation Installation of the pH probe is similar to the submerged level Guidelines sensor and other parameter probes e Install the probe only in streams that have continuous flow The sensing end of the probe must always remain wet e For proper operation there must also be enough flow to submerge the sensing end of the probe completely If flow in the stream is intermittent dry for periods of time the pH sensing bulb will dry out and its response time will slow This is a problem in situations where pH changes rapidly If the probe is dry long enough it will first lose sensitivity then be slow to respond and finally stop working Never let the sensing end of the probe dry out completely e Installation in streams with high grease content will result in poor performance and require frequent cleaning and recalibration Greasy substances being nonconductors of electricity weaken the electrical potentials formed between the glass
96. Velocity data points may be either level to flow or level to area Level Units For Data Point Entry Ft In M MM Flow Rate Units GPM GPS MGD CFS CFM M3S M3H M8D LPS CFD GPH AFD CFH CFM M3M Set 1 4 0 Points Entered Add Point units Set 1 Data Point 1 Enter _ _ level units __ ___ units of volume B 3 4250 Flow Meter Appendix B Programming Worksheets B 3 Flow Conversion B 4 Level to Flow Rate 15 Set 1 4 1 50 Points Entered Use Edit Point Add Point Clear Print 16 Set 1 4 Data Point 1 50 Enter _ __ level units __ __ units of volume Data Point Set 1 Flow Conversion Type Weir flume Equation Manning Data Points 2 Type Of Device Weir Flume 3 Select Type Of Weir V notch Rectangular Cipolletti Select V notch Weir Angle In Degrees 22 5 30 45 60 90 120 5 End Contractions On Rectangular Weir Yes No 10 11 12 13 14 15 16 Rect Weir With End Contractions Enter Crest Length Feet or meters Cipolletti Weir Enter Crest Length___ Feet or meters Type Of Flume Palmer Bowlus Parshall Trapezoidal H HS HL Leopold Lagco Palmer Bowlus Size 4 6 8 9 10 12 15 18 21 24 27 30 48 Parshall Size 1 2 3 6 9 1 0 1 5 2 0 3 4 5 6 8 10 12 Trapez Size LG 60 V 2 45 WSC 45 SRCRC XL 60 Flume Size 5 75 1 2
97. a 10 derating factor You can use the same method to calculate for lead acid batteries except the current will be 6 500 mA and the period correspond ingly longer in this case a little over 16 days You can run the full number of days calculated without derating if your batteries are new and at 100 capacity but you will leave yourself no safety factor if you are in error on either of these assumptions Remember if the battery fails there will be a period of time during which no measurements will be taken and no data stored if you are also using FLOWLINK software 4250 Flow Meter Section 1 Introduction 1 9 1 Calculating Current Draw Batteries lose capacity as they age Capacity also drops off as temperature falls Low temperatures make less capacity available due to the slowing of the chemical reactions while high temperatures accelerate the deterioration of battery plate sepa rators particularly if they are aged Nickel cadmium batteries show fairly rapid rates of self discharge A battery that is fully charged and then placed in storage will lose some capacity each day In a week this could easily be 5 or more When using lead acid batteries you must be careful to avoid complete discharge as this may cause cell reversal which will ruin the battery Also complete discharge in low temperature ambients may cause the battery to freeze which can deform the plates or even crack the case Always operate these batteries with
98. a flow meter will not need both the analog and modem boards If your installation does however you should contact the factory The analog board terminates in a 6 pin male M S connector on the flow meter case Flow meters built with the analog board option are also supplied with an output cable This cable connects to the wiring that runs to the equipment controlled by the 4 20 mA current loop and to the 6 pin M S connector on the flow meter The cable has a 6 pin female M S connector and is pro vided with stripped pigtail ends for convenient wiring 4 6 4250 Flow Meter Section 4 Options and Accessories Table 4 2 Multiple Analog Output Board Specifications Operating Temperature 0 to 140 F 18 to 60 C Output Accuracy 0 5 of full scale Resolution 0 1 of full scale 0 20 mA Electrical Isolation Isolated from each other and from the flow meter Calibration Factory calibrated no further adjustments necessary Maximum output distance 1500 feet 457 3 m using 18 AWG wire Current Range per loop 0 to 20 mA Maximum Load per loop 750 ohms Analog Output 1 Terminations Pin A Red wire Pin C White wire Analog Output 2 Terminations PinD Brown wire Pin F Blue wire Analog Output 3 Terminations Pin E Black wire PinB Green wire Note If you must strip the cable further back to facilitate wiring you will expose an orange yellow and purple wire You may disregard these wires a
99. a gel Ingestion Material is not toxic and will pass through the body normally Inhalation Slight irritation is possible but none is expected Medical Effects Generally Aggravated by Exposure Respiratory ailments Chronic Effects Carcinogenicity May cause eye skin and mucous membrane irritation and drying Section 3 Composition Information on Ingredients Component Name CAS Number by Weight Synthetic amorphous silica gel SiO2 112926 00 8 100 Cobalt Chloride 7646 79 9 5 While this material is not classified as hazardous under OSHA regulations this MSDS contains valuable information critical to the safe handling and proper use of this product This MSDS should be retained and available for employees and other users of this product Section 4 First Aid Measures Eyes Rinse eyes well with water while lifting eye lids If irritation persists consult a physician Skin Wash affected area with soap and water Ingestion Ingestion is unlikely this material will pass through the body normally Inhalation Remove the affected person to fresh air and get medical attention if necessary 4250 Flow Meter Appendix D Material Safety Data Sheets Multisorb Technologies Inc Silica gel Indicating February 14 2009 Page 2 of 5 Notes to Physician Not applicable Section 5 Fire Fighting Measures Flammable Properties Not flammable Flash Point Not applicable Method Not applicable Fla
100. abilization time reaches 5 minutes You can mount the probe facing either upstream or downstream but Teledyne Isco recommends facing upstream as there is a stop on the sensor carrier that is not effective when the probe is facing downstream Remember to unscrew the rubber guard cap from the sensing end of the probe when you install it or the probe will be unable to sense the flow stream The guard cap is to protect the probe during shipment and storage and to keep the glass membrane and liquid junction from drying out If you remove the probe for any reason clean it and replace the cap after filling with 4 0 buffer solution Never store the probe dry or without the cap in place The Isco amplifier box extends the allowable distance between the probe and the flow meter The probe has a 25 foot cable so you must mount the amplifier within this distance The maximum distance between the amplifier box and the flow meter is 1 000 feet Table 4 3 pH Probe Specifications Description Size Submersible horizontal mounting probe with combination type electrodes Porous Teflon liquid junction to resist fouling and coat ing Steam sterilized glass hemi bulb for long term stability 6 long x 3 4 NPT Body Material Stainless Steel pH Range 0 to 14 pH units Temperature 32 to 176 F 0 to 80 C pH Accuracy 0 1 pH units over the full range pH Electrode Junctions Double porous junction
101. able Totalizer CF or other units se OAA Reset Sampler Enable Totalizer Yes No Sampler Pacing Disable Volume Flowlink Conditional Sampler Pacing Enter Pacing Volume _ CF Condition Level Flow Rate Rainfall D O pH Tempera ture YSI pH YSI D O YSI Conductivity YSI Tempera ture Condition Greater Than Less Than Rate Of Change Select Operator Done Or And Condition True Pacing Interval Pace Every Minutes Condition False Pacing Interval Pace Every Min utes Sampler Enable Mode Disable Enable Conditional Storm Flowlink 2 Level Greater Than _ Feet or meters Rainfall Amount _ Inches other units 4 Rainfall Time Period 15 Min 30 Min 1 Hr 2 Hr 4 Hr 6 Hr 8 Hr 12 Hr 24 Hr 48 Hr 72 Hr Time Since Last Rainfall Days enter 1 to 7 Condition Level Flow Rate D O pH Temperature Rain fall YSI pH YSI D O YSI Conductivity YSI Temperature B 8 Alarm Dialout Mode B 9 Printer B 10 Reports History 4250 Flow Meter Appendix B Programming Worksheets 7 Level Greater Than Less Than Rate Of Change 8 Level Greater Than _ Feet or meters 9 10 11 12 13 Select Operator Done Or And Flow Rate Greater Than Less Than Rate Of Change When Enable Condition Is No Longer Met Disable Sam pler Keep Enabled Enable Currently Latched Reset No Yes Printer On off With Enable Yes No You must have a modem i
102. able is securely fastened along the back downstream edge of the ring Otherwise the sensor may provide inaccurate level readings under conditions of high velocity Do not overtighten the plastic cable ties they should be tight ened just enough to secure the cable in place without greatly indenting the cable Overtightening the plastic ties may col lapse the reference tube in the cable blocking it The spring ring may need anchoring Under conditions of high velocity greater than 5 feet per second or 1 5 meters per second the ring may not have sufficient outward spring force to maintain a tight fit inside the pipe The ring may start to lift off the bottom of the pipe in a waving fashion or may even be carried downstream This problem is more prevalent in the larger diameter pipes 10 12 and 15 and in pipes with smooth inside surfaces such as plastic pipes If any of these conditions are present or if movement of the mounting ring is detected or suspected you must anchor the ring in place You can do this by setting screws through the ring into the pipe or by other appropriate means If there is a problem with the smaller diameter rings it may be suf ficient to simply increase the outward spring force of the ring by bending it into a less round configuration For pipes larger than 15 in diameter Teledyne Isco offers the adjustable Scissors Ring also known as the Universal Mounting Ring This device consists of two or
103. apply the following explanations to the values displayed Signal Spectrum Explanation Strength Strength 0 0 Unit is approximating velocity Appears when level is below minimum velocity depth 0 ERR Not enough reflective particles ERR ERR Not working call factory 4250 Flow Meter Section 2 Programming If there is a number greater than zero displayed for signal strength the following is generally indicated 1 a very weak return signal 100 a very strong return signal Numbers from 10 to 90 are normal and numbers of 50 to 90 are typical for sewers If there is a number greater than zero displayed for spectrum strength the following is generally indicated Below 25 the area velocity return signal is very noisy A number near 100 indi cates the return signal is very clear The typical range in most installations is from 40 to 100 There are two important things to remember when interpreting these numbers e Is the current velocity value on the display accurate e Are these two numbers fairly consistent from one reading to the next If the level flow readings are valid you can assume the system is working and the signal and spectrum percentage values dis played here should be adequate The values should not change more than 25 from one reading to the next By contrast numbers that vary widely from one reading interval to the next are indications of an unstable installation and you sh
104. ardous Materials Identification System HMIS Rating Health 1 Flammability 0 Physical 0 The HMIS rating information is intended solely for the use of individuals trained in the use of the HMIS rating system The NPCA specifically recommends that prepares of MSDSs should not place HMIS PPE designation codes on the MSDSs or labels that leave the facility as it is not known the conditions under which the customer will use this product This MSDS was prepared by George E Mckedy Senior Applications Development Specialist Multisorb Technologies Inc This data and recommendations presented in this data sheet concerning the use of our product and the materials contained therein are believed to be correct but does not purport to be all inclusive and shall be used only as a guide However the customer should determine the suitability of such materials for his purpose before adopting them on a commercial scale Since the use of our products is beyond our control no guarantee expressed or implied is made and no responsibility assumed for the use of this material or the results to be obtained therefrom Information on this form is furnished for the purpose of compliance with Government Health and Safety Regulations and shall not be used for any other purposes Moreover the recommendations contained in this data sheet are not to be construed as a license to operate under or a recommendation to infringe any existing patents nor should they
105. are available for different pipe sizes A kit is also available for partial pipe applications consult your Isco Mounting Rings Installation and Operation Guide For a listing of part numbers and ordering information see Appendix A The AV sensor installation is finished by coiling any excess sensor cable and securing it using cable clamps or other means The reference tube inside the cable can be restricted or blocked if the cable is kinked sharply bent or otherwise pinched The sensor cable should be handled and mounted with care Also if there is any appreciable distance between the point where the sensor cable leaves the mounting apparatus and the location of the flow meter be sure to attach the cable to the flow stream wall to prevent it from vibrating moving around tangling or possibly collecting debris CAUTION Under no circumstances should you leave any extra length of sensor cable dangling freely in the flow stream where it could trap debris or become tangled Use gloves and eye protection when assembling and installing the rings in a pipe Though deburred the edges of the stain less steel can cut if improperly handled Please read the infor mation on how best to install this device Observe general safety procedures when entering any man hole See General Safety Procedures in the back of the man ual for more information on general hazards and necessary precautions 3 19 4250 Flow Meter Section 3 Install
106. at the mem brane You must use the Isco Temperature Probe with the D O Probe to provide temperature compensation Wrap both the D O Probe and Temperature Probe in a damp cloth Wait ten minutes for it to stabilize then proceed Go to step 1 on the flow meter Select PROGRAM then step through the units of measure with Enter until you reach the menu for pH measurement Select NOT MEASURED Press Enter Then D O UNITS will appear Select either MG L or PPM Press Enter Exit the program and re enter going to step 3 You must select measurement of D O in step 1 or the D O menu will not appear in step 3 If you cannot get the D O menu to appear in step 3 recheck your selections in step 1 Remember that you must select NOT MEASURED for pH in step 1 or D O will not appear on the menu for the rest of the program SELECT PARAMETER TO ADJUST NONE LEVEL D O Select D O Press Enter This display will appear D O CALIBRATION D O STANDARD ABS BAROMETRIC PRESSURE 4 12 Installation of Parameter Probes in Mounting Rings 4 13 The YSI 600 Multiple Parameter Sonde 4250 Flow Meter Section 4 Options and Accessories Altitude is just off the screen You can select D O STANDARD if this calibration medium is available to you Do not select ABS absolute BAROMETRIC PRESSURE unless you are at sea level or know how to correct for this value The barometric pressure provided from the Weather Bureau is corrected for altitude Select
107. ation 3 9 Sampler Interface 3 20 One of the uses of the 4250 Flow Meter is to control a sampler in a flow paced sampling mode Flow paced sampling means that the flow meter is programmed to signal the sampler to take a sample after a specific volume of flow has passed through the flow stream rather than after a particular period of time In this mode the sampler and flow meter will be able to compensate for varying flow rates The 4250 Flow Meter may be used with any of the Isco Wastewater Samplers listed in Section 1 An optional 25 foot 7 6 m long connect cable is available to connect the flow meter to the sampler Attach the six pin female connector on the cable to the Sampler connector on the side of the flow meter This is the second connector from the top Attach the connector on the other end of the cable to the Flow Meter socket on the sampler The flow meter will then be connected to the sampler s power supply and the sampler will be able to receive flow proportional signals from the flow meter Refer to the sampler manual for further details 4250 Flow Meter Section 4 Options and Accessories 4 1 4200T Modem 4 1 1 How it Works This section describes accessories available for use with 4200 Series Flow Meters There are two groups of accessories One group of options you can use with any of the 4200 Series The other group are accessories for a specific type of level sensing and can only be used with one flow me
108. ature TEMPERATURE ENABLE ALARM HYSTERESIS XX XXX DEG F or C The following will appear if you are measuring pH pH ENABLE ALARM HYSTERESIS X XXX pH The following will appear if you are measuring D O DO ENABLE ALARM HYSTERESIS X XXX PPM or mg l depending on units selected in Program 2 4 2 Optional Outputs 4250 Flow Meter Section 2 Programming A set of menus similar to those shown above for pH D O and temperature will then appear for the YSI 600 Sonde if you have selected it You can set hysteresis for YSI pH YSI D O YSI Con ductivity and YSI temperature if these parameters have been turned on in previous program selections After all the HYSTERESIS menus have been set press Enter The display will return to the Setup menu This time select OPTIONAL OUTPUTS with the arrow key Press Enter OPTIONAL OUTPUTS e ANALOG OUTPUT e SERIAL OUTPUT ALARM BOX ALARM BOX refers to an external accessory used to signal alarms from flow meter measurements See Section 5 for more information about the Alarm Box Note that choice of SERIAL OUTPUT will eliminate ALARM BOX as an option Likewise choice of ALARM BOX will eliminate SERIAL OUTPUT as an option If you select any of these OPTIONAL OUTPUTS the flow meter will request that you turn them on or off If you are running on battery select OFF for all unused outputs ANALOG OUTPUT refers to the flow
109. be confused with state municipal or insurance requirements or with national safety codes 4250 Flow Meter Appendix D Material Safety Data Sheets D 7 4250 Flow Meter Appendix D Material Safety Data Sheets D 8 4250 Flow Meter Index Numerics 4 20 mA Output 2 19 4 4 Programming 2 42 4200T Modem 4 1 A Accessory Options Parts List A 6 Accidental Submersion 3 8 Alarm Box 2 24 4 12 Analog Output 2 19 4 4 Programming 2 42 Area Velocity Sensor Cleaning 5 5 Maintenance 5 5 Operating Principles 1 3 Battery Life Expectancy 1 12 Calculating 1 13 Calculating Current Draw 1 14 Flow Meter Settings 1 12 Cc Chart Paper Replacement 5 8 Compatible Equipment 1 2 Connectors 1 8 Controls 1 8 Current Draw 1 14 D Display 2 1 Dissolved Oxygen Probe 4 21 F Flow Conversion Area Velocity 2 33 Data Points 2 40 Equation 2 38 Manning 2 39 Weir Flume 2 36 Flow Conversion Types 2 5 Flowlink Software 4 12 H High Low Alarm Box 2 24 4 12 I Indicators 1 8 Installation AV Sensor 3 12 Desiccant Canister 3 1 Desiccant Cartridge 3 1 Flow Meter 3 7 Maximum Distance 3 9 Parameter Probes 4 13 K Keypad Functions 2 2 L Language 2 27 Level Measurement Open Channel 3 13 Low Power 3 3 Maintenance Cable Inspection 5 7 Case 5 1 Desiccators 5 2 Moisture Damage 5 1 Printer 5 8 Probe and Cables 5 5 Software updates 5 18 Material Safety Data She
110. begun a set SET 1 DATA POINT 1 EXIT TO QUIT ENTER 0 00 FT 0 000 FT2 Other units of measure may appear depending on what you chose previously Enter values appropriate for what you have measured When you have entered all the points for a data set press Exit The fol lowing will appear SET 1 X POINTS ENTERED e USE EDIT POINT e CLEAR e e PRINT SAVE e USE will not appear until you have entered at least four points USE EDIT POINT CLEAR PRINT and SAVE all let you manipulate the data points you have entered USE tells the flow meter to generate a flow profile based on the data set you have entered You need at least four data points in one set for the flow meter to calculate a valid flow profile for the stream EDIT POINT allows you to change the value of a data point you have already entered 2 35 4250 Flow Meter Section 2 Programming 2 36 2 4 5 Step 2 Flow Conversion Level to Flow Rate CLEAR erases an entire data point set from the flow meter s memory PRINT allows you to print the entire contents of a data point set you have entered on the flow meter s internal printer SAVE instructs the flow meter to save a set of data points as you have entered it If you select EDIT POINT the flow meter will display the fol lowing ENTER POINT NUMBER TO EDIT POINT NUMBER TO EDIT X Enter the number of the data point you want to change not the value of it Pr
111. bes must be kept con stantly wet or they can be damaged Their use in streams with intermittent flow such as storm drainage is not recommended Note that the pH probe is a con sumable item and will eventually need replacement in any case 2 29 4250 Flow Meter Section 2 Programming 2 30 RAIN GAUGE e INCHES e MM e e NOT MEASURED e You must have an Isco 674 Rain Gauge or approved equiv alent connected to the flow meter through the Rain Gauge Port to sense rainfall MM millimeters The rain gauge is factory calibrated See Section 4 for more information about the rain gauge If you are not using a rain gauge you would select NOT MEASURED for this step pH UNITS OF MEASURE e pH e NOT MEASURED e pH measurement determines the relative acidity or alkalinity of a solution You must have an Isco pH Probe or approved equiv alent connected to the flow meter through the parameter port to sense pH pH measurements range from 0 to 14 pH units with solutions below 7 considered acidic and solutions above 7 alkaline Pure water has a pH of 7 These devices require periodic recalibration for accurate sensing of pH See Section 4 for more information about the pH probe If you are not using a pH probe you would select NOT MEASURED for this step e Ifyou choose NOT MEASURED for pH no more refer ences to pH will appear for the rest of the program e Ifyou select pH you will be unable to measure D O an
112. calibrated to provide a contact closure to the flow meter for every hundredth of an inch 0 01 or 0 1 mm of rainfall Software in the flow meter stores this infor mation in memory and prints the accumulated data as a text line on the printer chart It also allows the printout to be expressed in metric You may if you wish provide a rain gauge of your own choice but to ensure compatibility with the flow meter s oper ating environment it must conform to the following specification e It must provide an isolated dry contact closure e It must be a normally open contact configuration e It must close for 100 ms 25 ms 150 ms with less than 2 ms contact bounce e It must provide a contact closure for every 0 01 or 0 1 mm of rainfall A cable assembly is available to connect a user supplied rain gauge to the flow meter More information about the rain gauge is available from the factory or the Rain Gauge Manual MUULTHLTTLLL ALA ALAA 674 Rain Gauge Figure 4 5 674 Tipping Bucket Rain Gauge 4250 Flow Meter Section 4 Options and Accessories 4 6 Isco Flowlink Software Teledyne Isco offers a proprietary software system for data acqui sition storage retrieval and analysis This software system Flowlink contains programs that allow 4200 series flow meters to store blocks of level and other data readings in the flow meter s memory You retrieve this stored data with either a laptop computer or central compute
113. cant Dust may damage the printer mechanism Water or dirt drawn into the reference port can block the tubing preventing the pressure transducer from sensing atmospheric pressure Symptoms of a clogged reference port on the AV sensor are varied Noticeable drift in measured level when you know the level is essentially constant or an oscillation in the level corre sponding to changes in barometric pressure are two indicators of clogging in the reference port tube If dirt and or moisture block the reference tube between the des iccant cartridge and the AV sensor connector on the flow meter you may be able to clear the blockage from the tube by applying compressed air Likewise if the blockage is inside an extension cable for the AV sensor you can try to clear it with air In these cases both ends of the tube are accessible However if the blockage is inside the AV sensor s cable the sensor may be ruined The cable is sealed where it enters the AV sensor and the sensor itself is a sealed unit Consequently you cannot push air through the tube Applying pressure to the con nector will only drive the water further into the line and may destroy the transducer inside the probe If you suspect blockage in the AV sensor s reference tube return the probe to Teledyne Isco The repair department may be able to vacuum the water or blockage from the line however water may cause permanent internal damage and not all blockages are removable
114. ces Alternate versions designed for operation from 240 Volts AC 50 60 Hz are also available and are intended pri marily for export Both are supplied with a line cord for conve nient attachment to the AC power source They are both capable of operating the flow meter The Battery Backed Power Pack provides 12 VDC at 5 Amperes and is backed up by a 1 2 Ampere hour nickel cadmium battery This is built in a package the same size as the standard power supply and is intended for use where short term power interruptions are frequent but unacceptable for flow meter operation M Note The battery in the Battery Backed Power Supply is of limited capacity It is intended for short term backup duty only With one fourth of the capacity of a standard battery it can only power the flow meter for a limited period of time approximately one day 3 5 4250 Flow Meter Section 3 Installation Attaching the Power Supply Mount the power supply on top of the flow meter cabinet the same as described for the batteries Secure the power supply with the two rubber draw catches pulled over the brackets on the ends of the power supply Attach the short cable with the smaller connector to the top connector on the right side of the flow meter case Connect the longer cord with the plug on it to an unswitched AC outlet Refer to Power Products Guide for details about charging batteries with the power pack Figure 3 2 Power Pack Installed on Flow Meter
115. cesssscecesssssececeessesaeccsseeeeaeceeseeeseecsseseeaeeeess 60 3704 081 Special Y Cable without diodes c ccccccsscsccesssssccecessesececeesseeeeeceeseeseeceseseeaeeessseeeseeesseeeaaeeees 60 5314 278 Reference Port Tubing 10 x 1 4 ID Vinyl provides an extension to the desiccant tube 60 2703 111 Reference Port Tubing 25 x Ya ID Vimy v cecccccccscecscssssessesesscssssessssesssstsacsessesessssesatsesatseeaneaes 60 2703 112 Compression Bushing for non conduit wiring to Quick Disconnect Box 37 44 dia cable ccccccccccccceccsessessnnecceeeseceeeesesenssasaaececeeeeeseeseses 209 0076 06 Chart Roller seccsissccsvsicaseesssaacecceseetssatecs bain ahseestsagsceess beak sbevestdancebescge SE A E 60 3004 156 Printer TibDOMs Plack a 26s6ac sect os Genaea is sedan ses essevaeusnesweeestas a shcewtubnslah E E 250 0200 00 Plotter paper roll 58 ft stciciedht sels tiaiiadiek een elena aeons 60 2313 019 Spreader Bar siscecesatiereeiisscgeessadscesesinascdecksadascohevadaugegssdagdacdcedsadadegeerasgienesbanglaces sGlalaceeebbabasccebiss 60 3004 110 Optional Equipment High Low Alarm Relay Box cccccccssssscessssncceecesseacececesesaececcsesaeececssesaeeeccsesaaesecesesseeesensaaees 60 3404 028 4 20 mA Outputs ntertace sicc icssstvectsssitsenetisaterensasssgeeeshagsaeaetisdiessttiasidsvsbesiaaisvecssadaseeesteaidbesseits 60 1784 039 614 Rain Gauge 0 01 lt sscccecccascecdcigeaseviheonecaccusnctaatedsaps
116. cissors Ring Assemblies will require a base and scissors section for all sizes Sizes from 21 to 80 will also require two or more extension sections A 7 4250 Flow Meter Appendix A Replacement Parts and Accessories A 8 B 1 Setup 4250 Flow Meter Appendix B Programming Worksheets Use this form to make a hard copy of the program you use in your 4250 Most program steps can be completed in the shop without the flow meter being installed or at the job site However please note the following Year Month Day Hour Min Site I D Any three digit number Measurement Setup Level Reading Interval Velocity Do not attempt to fill out this sheet without first studying the manual especially Section 2 This section describes the program in detail and offers reasons you might choose one option over another This is particu larly so for those using the flow meter for the first time Keep this chart as a record For steps where a space is not provided on the sheet underline or circle your choices Some of the menus shown on this sheet may not appear on your flow meter The reason is that you must make choices from the first step forward that will prevent you from choosing other options later on Options can appear at several points of the program However menus pertaining to the options not chosen early on will not appear later An example is the alarm dial out feature This step requires your flow meter to have the optio
117. computer must always have something programmed into the unit so that becomes the default program Your flow situation will usually require other programming choices The text provided with each screen explains the reasons for the various menu options The display is a two line forty character per line liquid crystal LCD It has a backlight feature for easy viewing in low light sit uations The display has three different operating modes normal programming and messages In the normal mode the display shows such things as level flow rate total flow parameter measurement etc In the programming mode the top line of the display shows each step as you work through the program while the bottom line shows the choices available for that step In the message mode the display provides instruc tional information such as how to leave programming or what to do if you have entered a number that is out of range Following is a normal display on the flow meter This is typical of what the flow meter will display when it is in the normal oper ating mode and you are not programming it 0000004 78 CF 1 13 FT 16 NOV 02 1 03 CFS XX 8 25 37 An interpretation of the numbers on this display would be as follows Time and date will be replaced by pH D O and temper ature if you are using parameter sensing The X X to the right of the time indicates letters that may appear from time to time on the 4250 Flow Meter The letter C will appea
118. cture shows you how D d h devel to measure level You then enter this value with the number keys Note that D LEVEL ADJUST must be done at the job site while most other programming can be done in the shop Figure 2 4 Measuring Level in Round Pipes 2 44 You should remove the sensor and mounting ring to measure the level if either of the following occur e Ifitis not possible to measure the level upstream when the sensor is installed cramped quarters inside smaller pipes e Ifthe sensor and its mounting ring create a visible jump in the stream This jump would be any noticeable disturbance on the surface of the flow stream where it passes over the sensor and mounting ring and is typical of lower flows See Section 3 6 for more infor mation Enter this value with the number keys LEVEL ADJUST must be done at the job site while most other programming can be done in the shop Unless you have reliable information about the size of the channel you should measure that also M Note It is very important to enter accurate measurements for both the level in the stream and the dimension s of the channel as all calculations of flow will be based on these measurements If the values entered are incorrect even by relatively small amounts all subsequent flow calculations will also be incor rect For example an error of only 14 for a 3 level and la fora 10 diameter round pipe can result in a combined error of over
119. d 32 1 2 Maximum Flow ___ units of measure Parameter To Adjust None Level pH D O YSI 600 Job Site only Enter Current Level _ ____ Ft or M Note Installations generally use either the Teledyne Isco parameter probes or the YSI 600 Sonde but not both Use the following menus for either the Teledyne Isco probes or B 5 4250 Flow Meter Appendix B Programming Worksheets B 5 Reset Totalizer B 6 Sampler Pacing B 7 Sampler Enable B 6 10 11 12 the YSI 600 Sonde Steps 3 4 and 5 can be used for both 2 and 3 point pH calibrations Rinse Probe And Place In 4 0 pH Solution Press Enter When Stable _ pH job site only Rinse Probe And Place In 7 0 pH Solution Press Enter When Stable _ pH job site only Rinse Probe And Place In 10 0 pH Solution Press Enter When Stable _ pH job site only YSI 600 D O Calibration only D O Standard Absolute Barometric Pressure Altitude Altitude Units Of Measure Ft M D O probe only ___ job site only D O only Enter Altitude Altitude Feet or meters at job site only Wrap D O Probe In Moist Cloth Press Enter When Stable a MG L at job site only Conductivity Calibration Units Ms cm Ppt Place Probe In Ms cm or ppt Press Enter When Stable Ms cm at job site only YSI 600 Dissolved Oxygen Calibration D O Standard Absolute Barometric Pressure Altitude 1 Reset Totalizer Yes No 2 En
120. d references to D O will not appear on the rest of the program e If your situation requires the measurement of both parameters pH and D O at the same time or if you also need to measure conductivity you should use the YSI 600 Multi Parameter Sonde If you select NOT MEASURED and press Enter the following will appear D O UNITS e MG L e PPM e NOT MEASURED e Measurement of dissolved oxygen is conducted in studies of water quality in lakes and streams Some dissolved oxygen is necessary for the survival of aquatic life in these waters You must have an Isco Dissolved Oxygen Probe or approved equivalent to sense dissolved oxygen The probe attaches to the Parameter Port These devices require periodic calibration for accurate sensing See Section 4 for more information about the dissolved oxygen probe PPM parts per million MG L milli grams per liter If you are not using the D O probe you would select NOT MEA SURED for this step Selection of PPM or MG L will keep references to pH from showing up on subsequent menus 4250 Flow Meter Section 2 Programming TEMPERATURE UNITS DEG Fe DEG C e NOT MEASURED This step sets up measurement of the temperature of the flow stream You must have an Isco Temperature Probe or approved equivalent attached to the flow meter s Parameter Port The temperature probe contains a thermistor and needs no further calibration Measurement is in degree
121. d by changes in baro metric pressure This tube is vented through the connector into the cabinet of the 4250 From there it is vented to the atmo sphere through a desiccant cartridge mounted on the side of either the flow meter or the Quick Disconnect Box 4250 Flow Meter Section 3 Installation 3 6 Area Velocity Sensor 3 12 Installation Before installing the AV sensor please consider the following e Exact dimensions for the channel and the correct level of the flow stream are essential for accurate results The importance of accurate measurements for both area and level cannot be overstated The 4250 makes all subsequent calculations based on these measure ments Errors in level measurement are more significant at low flows while dimensional errors become significant at higher flows Even minor errors in measurement will have a signif icant and cumulative effect For example in a nominal 10 diameter pipe with a 3 liquid level a measurement error of only 1 4 in the diameter of the pipe and 1 4 in the level will result in a cumulative flow error of more than 14 Damage to the pressure transducer ultrasonic trans ducers electronics or cable will ruin the sensor Handle the sensor with reasonable care when installing Do not drop or hit it The pressure transducer is sensitive to shock The sensor is encapsulated in a plastic potting compound and if damaged cannot be opened for repair The stan
122. d you want to achieve maximum life for the paper roll select a lower speed for chart advance If there is a great deal of activity in your stream and you need to use all three data lines selection of a faster chart speed will produce a chart more easily read and interpreted After you select the printer speed the flow meter will ask you to define what you want depicted by LINE A The printer can print as many as three separate lines at the same time The following will appear INPUT FOR PRINTER LINE A e LEVEL VELOCITY FLOW RATE pH OFF e TEMPERATURE YSI pH YSI D O YSI CONDUC TIVITY and YSI TEMP can also appear Remember that menus in parentheses may not appear due to previous program selections Either pH or D O may appear but not both The various YSI options will only appear if you enabled the YSI 600 in step 1 You must have the appropriate probes to sense these conditions Select OFF if you do not need this line If you select pH D O TEMPERATURE or any of the YSI options the flow meter will request that you set limits that will serve as the bottom of the chart and the chart full scale PRINTER LINE A BOTTOM SCALE X XX pH or other condition as selected previously You would enter here the lowest pH value you expect to see in your flow stream PRINTER LINE A FULL SCALE X XX pH or other condition as selected previously Enter here
123. dard AV sensor accurately detects levels above approximately 0 1 foot 30 mm and velocities for streams with a minimum depth of 2 4 inches 50 100 mm This value is selected in programming See Measuring Minimum Depth on page 2 14 Below the minimum depth velocities are approximated based on previous measure ments Although the standard sensor can measure levels less than 0 1 foot about one inch or 25 mm accuracy in this range is not guaranteed Shallower streams should be measured using the low profile AV sensor Streams that run consistently below one inch are not a good application for the 4250 Velocity measurements depend on the presence of some particles in the water either air bubbles or suspended solids If the flow stream is so clear that there are neither air bubbles nor suspended solids the velocity sensor cannot function properly and will not be able to read velocity In such cases it may be necessary to aerate the water upstream from the sensor with a small pump or other apparatus to ensure there is something to reflect the ultrasonic waves When installing the AV sensor in a pipe or invert mount the sensor upstream from the outfall For the most reliable readings place the sensor at the bottom center of the flow stream 4250 Flow Meter Section 3 Installation Although the sensor is easiest to calibrate when located at the bottom of the stream you can locate it off center in a larger pipe if there are g
124. de later in the program If no communication has been confirmed the following display will appear YSI COMMUNICATIONS CHECK e YES NO NO is the default If you select YES the following display will appear WARNING DO NOT DISCONNECT POWER YSI COMMUNICATION CHECK PLEASE WAIT 2 31 4250 Flow Meter Section 2 Programming 2 32 CAUTION Do not disconnect either sonde or flow meter power during a communications check The memory in the sonde can be dam aged by a power failure during an update If the communication check is bad the following display will appear COMMUNICATIONS CHECK FAILED PRESS ENTER TO CONTINUE The flow meter cannot communicate at 600 baud If your sonde has been set up for 600 baud you will get a communi cations failure Consult the YSI 600 Manual for what to do in this case If the communications check is good the following display will appear COMMUNICATIONS RATE SET AT 2400 BAUD PRESS ENTER TO CONTINUE After you press Enter the flow meter will advance to the fol lowing display YSI 600 pH UNITS OF MEASURE e pH e NOT MEASURED e e Selection of NOT MEASURED from any of the YSI menus will prevent you from activating that function later in the program If you wish to make use of the YSI 600 sondes pH measurement capability select pH If you do not select NOT MEASURED YSI 600 D O UNITS OF MEASURE e MG
125. dies over a period of nearly 50 years in the field of the control of hydrogen sulfide and other odors in sewers and treatment plants He has personally worked in a great many functioning sewers In the earlier years he did so he admits with little knowledge of the grave hazards to which he exposed himself It is gratifying that the subject of hazards to people working in sewers is receiving much more attention than in past years and good safety procedures are prescribed in various publications on this subject It is essential that people know and use correct pro cedures It is less important to know just what the hazardous compo nents of sewer atmospheres are as safety precautions should in general be broadly applicable but there should be a reasonable understanding of this subject It is disturbing to see statements in print that do not reflect true conditions One of the most common errors is the assumption that people have died from a lack of oxygen The human body is able to function very well with substantially reduced oxygen concentra tions No one worries about going to Santa Fe New Mexico elev 2 100 meters where the partial pressure of oxygen is equal to 16 2 a normal atmosphere is about 21 oxygen When first going there a person may experience a little shortness of breath following exercise People in good health are not afraid to drive over the high passes in the Rocky Mountains At Loveland Pass ox
126. ds and the cover lifted by straightening the legs which have been slightly bent at the knees 8 Other Precautions Other precautions which should be taken when entering a manhole are e Wear a hard hat e Wear coveralls or removable outer garment that can be readily removed when the work is completed e Wear boots or nonsparking safety shoes e Wear rubberized or waterproof gloves e Wear a safety harness with a stout rope attached e Do not smoke e Avoid touching yourself above the collar until you have cleaned your hands 9 Emergencies Every member of the crew should be instructed on procedures to be followed in cases of an emergency It is the duty of each crew chief to have a list of emergency phone numbers including the nearest hospital and ambulance service police precinct fire station and rescue or general emergency number C 3 4250 Flow Meter Appendix C General Safety Procedures C 2 Lethal Atmospheres in C 4 Sewers 10 Field Equipment The following equipment will be available for use Blowers Gloves Traffic cones Breathing apparatus Hard Hats Coveralls Harnesses First aid kits Manhole irons Emergency flashers Pick axes Flashlights Rain slickers Mirrors Ropes Gas detectors Safety vests Gas masks Waders The following is an article written by Dr Richard D Pomeroy and published in the October 1980 issue of Deeds amp Data of the WPCEF Dr Pomeroy is particularly well known for his stu
127. e Bisulfide when pure color ous cide gas indicator less anesthetic irritating vom Poisonous iting convulsions psychic distur bance Carbon CO Asphyxiant Col 1 53 Cannot be 40 000 5 000 At bottom Products Oxygen Dioxide orless odorless endured at 10 to when heated of com deficiency When breathed more than a 60 000 may stratify bustion indicator in large quanti few minutes at points sewer gas ties may cause even if subject above bottom sludge acid taste is at rest and Also issues Non flammable oxygen content from car Not generally is normal Acts bona present in dan on respiratory ceous gerous amounts nerves strata unless an oxygen deficiency exists 4250 Flow Meter Appendix C General Safety Procedures Table C 1 Hazardous Gases Continued Specific Explosive Likely 4 Max Max Safe 2 Simplest and Chemical Common ay Physiological Safe 60 8 Hour HN by pean niet Cheapest Formula Properties p Effect Min Exposure Exposure ae i Safe Method Density Limits Highest Sources N Air 1 RED ppm lower upper Concentration onresting Carbon Chemical 0 97 Combines with 400 50 12 5 74 0 Near top espe Manufac CO ampoules Monox asphyxiant Col hemoglobin of cially if present tured gas ide orless odorless blood Uncon with illuminat flue gas tasteless sciousness in ing gas products Flammable 30 min at 0 2 of com Poisonous to 0 25 Fatal bustion in 4 hours at moto
128. e pores You must usually replace both the electrolyte and the membrane to get an accurate reading In severe cases of fouling it may be necessary to change the membrane very frequently even as often as every other day A thin permeable membrane stretched over the sensor isolates the electrodes from the environment but allows gases to enter When a polarizing voltage is applied across the sensor oxygen that has passed through the membrane reacts at the cathode causing a current to flow The membrane passes oxygen at a rate proportional to the pressure difference across it Since oxygen is rapidly consumed at the cathode it can be assumed that the oxygen pressure inside the membrane is zero Hence the force causing the oxygen to diffuse through the membrane is propor tional to the absolute pressure of oxygen outside the membrane As the oxygen partial pressure varies both the oxygen diffusion through the membrane and the probe current change propor tionally 4 11 2 Probe Preparation 4 11 3 Membrane Thicknesses 4250 Flow Meter Section 4 Options and Accessories The following describes how to prepare a new probe for use or how to change membranes on an existing probe First unscrew the sensor guard remove the O ring and membrane then thor oughly rinse the sensor with distilled water Prepare the KC electrolyte according to the directions on the bottle Use distilled water only You install the membranes by hand The probe is
129. e Avoid using a work surface made of an extremely good insulator Plastic and glass are good insulators and should be avoided A metal surface is best a wood surface is acceptable Conductive grounding mats are available for work stations and are worthwhile if much repair is to be done e The degree of hazard depends on the level of humidity Be particularly careful if the work area is extremely dry or if the work is being done in cold seasons when indoor forced heating and outdoor low temperatures cause the relative humidity level to be very low e Keep yourself grounded when handling disassembled equipment After a unit has been opened for repair always touch the metal chassis before touching any of the circuit compo nents e Be especially careful handling the CMOS integrated circuits when they are removed from the rest of the circuitry Simply being connected to the rest of the circuitry provides some protection Most of the circuitry is well protected from damage caused by static discharge when the unit is powered up However an IC should never be replaced when the unit is turned on e Individual CMOS semiconductors and built up printed circuit boards should always be transported in conductive packaging Foil is satisfactory metallized plastic bags work well Ordinary plastic bags and pink poly are not satisfactory 5 16 4250 Flow Meter Section 5 Maintenance and Service unless the legs or leads are also stuck into a b
130. e disk exposes the delicate paper thin metal diaphragm of the pressure transducer Do not touch the diaphragm with fingers or tools Gently flush with water without training the stream directly into the cavity Forcing water or air directly against the diaphragm can ruin the probe Figure 5 2 Standard AV Probe with Mounting Plate Protective Disk Figure 5 3 Standard AV Probe Protective Disk Exposed 5 3 3 Cleaning the Low Profile AV Probe The low profile AV sensor is cleaned in the same manner as the standard AV sensor However the transducer is encased in stainless steel Nevertheless do not insert anything into the vent holes when cleaning the transducer area Figure 5 4 Low Profile AV Probe Without Mounting Plate 5 6 4250 Flow Meter Section 5 Maintenance and Service Figure 5 5 Low Profile Probe With Transducer Housing Revealed 5 3 4 Cable Inspection Periodically inspect the AV sensor cable for wear caused by abuse or exposure to the elements Damaged cables can affect the oper ation of the probe particularly if the reference port vent tube inside the cable is collapsed or blocked Unless the damage is very close to the connector which can be replaced a probe with a damaged cable is not repairable Keep connectors clean and dry Although connectors are sealed if moisture penetrated a loose connection or uncapped connector the connector and or probe could be ruined In permanent instal lation
131. e flow meter with level and other information In this step you set the level that the flow meter measures First you measure as accurately as possible the level in the flow stream Then you enter this value with the numeric keys Accuracy is important The level measurement and channel dimensions that you enter into the flow meter provide the basis for all subsequent flow calculations The flow meter also has an input port for measurements other than level This is the Parameter Port Here you can measure such variables in the flow stream as temperature pH the acidity 2 7 4250 Flow Meter Section 2 Programming Figure 2 1 The YSI 600 Sonde 2 8 2 3 4 Step 4 Reset Totalizer or alkalinity of a solution and D O dissolved oxygen in the flow stream You can have either pH with temperature D O with temperature or temperature alone The port is not dedicated to a particular sensor except through programming You can change the sensor For example you can change from a pH probe to a D O sensor if you change the programming Selection of one parameter will keep the other from showing up on the menus Note however that it is possible to measure several different stream conditions including pH and D O at the same time with the YSI 600 Sonde The YSI 600 Sonde The YSI 600 Sonde is a multi purpose water quality mea surement device It is intended for use in research assessment and regulatory compliance The sonde attache
132. e identifier The table lists the type identi fiers Note that the flow meter s current time and the sample event time stamp appear as a number in standard spreadsheet format days since 1900 The supported baud rates are 9600 4800 2400 and 1200 no parity eight bits and one stop bit Periodic Output Use a special RAIN GAUGE connector cable contact the factory for assistance The periodic output will ter minate during phone connection and when the interrogator cable is connected It is important to use CHECKSUM if you plan to use internal modems or the interrogator The UART is shared with these devices 2 23 4250 Flow Meter Section 2 Programming 2 24 If you select SERIAL OUTPUT from the OPTIONAL OUTPUTS menu the following display will appear PERIODIC SERIAL OUTPUT ON OFF Selection of OFF from this menu will disable this feature and there will be no further references to it The Serial Output data appears on the Interrogator connector of the flow meter You should not use a standard interrogator cable for this application as the sense line in the standard cable is shorted to ground Selection of ON from this menu will enable the feature and cause the following display to appear SELECT BAUD RATE N81 e 9600 4800 2400 e 1200 After you select the appropriate baud rate the program will advance to the following menu SERIAL OUTPUT INTERVAL e15 SEC e e1 MINe 5MINe 15 MIN
133. e is also adversely affected when allowed to dry out Salt crystals from the electrolyte or precipitates of the solution measured will form salt bridges either within or on the surfaces of the liquid junction causing the reference to be less conductive and resulting in a higher reference impedance This condition will typically worsen until the unit no longer func tions Soaking the reference electrode in a 4 0 pH solution or tap water if the buffer is not readily available may bring the ref erence back to life Boiling the electrode in 4 0 buffer solution or tap water could revive the electrode in more severe situations If none of these solutions work it may be necessary to replace the probe This probe measures the amount of oxygen dissolved in a stream or waterway Oxygen dissolved in water is necessary for many forms of life that dwell in lakes and streams Inadequate supplies of dissolved oxygen will cause fish and other aquatic life that depend on them as a food source to die off or be sharply dimin ished in numbers The measurement of dissolved oxygen content is of interest to those monitoring the condition of lakes and streams Fish must have a certain minimum concentration of dis solved oxygen to thrive typically 4 to 6 mg l Various types of pollution can cause the amount of oxygen dis solved in water to drop sharply placing the aquatic life forms at serious risk The D O probe measures the amount of oxygen dis solved in
134. e open end If you need service for your D O probe Teledyne Isco recommends returning the unit for evaluation In addition to servicing the probe we can also provide advice on product applications and you can also purchase other accessories for use with the D O probe Use only 2 mil membranes with D O probes connected to Isco flow meters Table 4 4 D O Probe Specifications Cathode Gold Anode Silver Membrane FEP Teflon 2 mil standard Electrolyte Half saturated KCI Potassium Chloride Temp Range 0 to 45 C Polarizing Voltage 0 8 Volts Nominal Probe Current in Air at 30 C 19 microamps nominal Probe Current in Nitrogen at 30 C 0 15 microamps or less Connection 12 ft 3 2 m cable with 5 pin male M S connector Response Time Typical response for dissolved oxygen using supplied membranes is 90 in 20 seconds Response at low dissolved oxy gen levels is typically 90 in 60 seconds 4 25 4250 Flow Meter Section 4 Options and Accessories Figure 4 10 D O Parameter Module 4 11 6 Calibrating the D O 4 26 Probe with a Flow Meter ya A Dissolved Oxygen Module You must use the Isco 270 D O Module box between the probe and flow meter this extends the distance between the probe and the flow meter to 1 000 feet Prepare the probe as described above if this has not already been done fill the probe cavity with electrolyte and se
135. e programming procedure and practice working through the program on the flow meter to become comfortable with programming You can program the unit in the shop rather than at the job site with the exception of the level adjustment if you want This will minimize the possi bility of dirt and moisture getting inside the flow meter at the installation If the unit is new at this time you can install the desiccant can ister It is provided in the accessory package and looks like a small flat can with little holes in it Open the flow meter case lid Note the small clamp that resembles a bottle cap opener located near the bottom right hand corner of the case lid Install the des iccant canister by pressing it under this bracket with its viewing window lined up with the circular hole in the bracket Make sure the clamp is fully engaged over the canister The par ticles inside the desiccant window should be blue If the particles are pink the desiccant is saturated and you need to regenerate it before using it If the unit has been in use and has been returned for reprogramming clean it and inspect it as outlined in Section 5 of this manual You can also install the external desiccant car tridge which provides pressure equalization for the AV sensor pressure transducer Snap the external desiccant cartridge into the clamps mounted on the top of the cabinet Then attach the silicone tubing between the top of the desiccant cartridge and the b
136. e start of the test Exiting from the MAN UAL CONTROL menu at the end of the test will return all active 4 20 mA ports to normal operation Programming for the conditions and values that determine the operation of the 4 20 mA loop or loops is done in Programming Step 2 following the entry of FLOW RATE AT MAXIMUM HEAD 2 21 4250 Flow Meter Section 2 Programming 2 22 M Note The information in the following section is provided for those who can write their own software programs to process the data transmitted from the Serial Output port Special cables may be required Contact Teledyne Isco technical support for more information Serial Output Returning to the OPTIONAL OUTPUTS menu you will see the SERIAL OUTPUt option This feature lets the flow meter transmit the most recent values for all currently enabled ports as ASCII text You can then write a simple program to retrieve this data periodically or you can do it inter actively using a terminal program Command Line Use the INTERROGATOR connector The lines of text contain the port values for each port that is turned on The DATA command will use a special command response protocol The following table provides the ASCII codes for port types and standard units of measure Table 2 1 ASCII Output Codes Code Parameter Units DE Description String ID Unit specific identifier Unsigned long M
137. e weekly and monthly reports You can choose the content of the reports by working through the menus in step 1 2 59 4250 Flow Meter Section 2 Programming 2 60 If you select OFF the program will advance to the next step and there will be no report A generated If you select YES the fol lowing will appear REPORT A DURATION TO BE IN e HOURS DAYS MONTHS After you select the units of time this will appear ENTER REPORT A DURATION XX HOURS DAYS or MONTHS could also appear depending on what you selected for the previous step The time selected becomes the time interval that will be covered in the report Then the flow meter will ask you when you want the first report printed PRINT REPORT A AT YR XXXX MONTH XX DAY XX HR XX MIN XX Then REPORT GENERATOR B e ON OFF PRINT The second report generator lets you program the flow meter to print two independent reports at different intervals for example This is useful for those who need both a weekly and a monthly summary of activity on the flow meter If you select OFF for this step the program will advance to the next step and there will be no report B generated If you select YES the following will appear REPORT B DURATION TO BE IN e HOURS DAYS MONTHS Select the appropriate interval for this second report After you select the units of time the following will appear
138. ear depending on the flow meter you have and choices you made earlier in the program D O pH TEMPERATURE and RAINFALL all require activation in step 1 and connection of the appropriate sensor to the flow meter D O and pH will never appear together as only one can be used at a time When you have selected the condition you want the display will advance to the following CONDITION e GREATER THAN LESS THAN e RATE OF CHANGE e For these conditions you enter an amount which if exceeded GREATER THAN or if dropped below LESS THAN or if changed too quickly RATE OF CHANGE will activate the alarm dialout For RATE OF CHANGE you enter two values amount and time over which change occurs Then the display will advance to the following SELECT OPERATOR e DONE OR e e AND As described for sampler enabling previously this step allows you to combine conditions to produce an alarm dialout signal Select DONE if you don t need more than one condition to trigger the alarm If you want either of two conditions to trigger an alarm select OR If you want both of two conditions to be met before signalling an alarm select AND Selection of DONE will advance you to the next display menu Selection of OR or AND will return you to the CONDITION menu to select the other condition 2 4 11 Step 8 Printer 4250 Flow Meter Section 2 Programming The flow meter will then request that
139. ed safety device that is unreliable is worse than none at all Remember that the nose fails too when it comes to sensing dan gerous concentrations of HoS Various other toxic gases have been mentioned in some publica tions It is unlikely that any person has been asphyxiated in a sewer by any of those other gases except possibly chlorine The vapor of gasoline and other hydrocarbons is sometimes present in amounts that could cause discomfort and illness but under that condition the explosion hazard would be far more serious The explosimeter tests as well as the sense of smell would warn of the danger Pipelines in chemical plants might contain any C 5 4250 Flow Meter Appendix C General Safety Procedures C 3 Hazardous Gases Chemical Formula Common Properties Specific Gravity or Vapor Density Air 1 number of harmful vapors They too are sensed by smell and explosimeter tests if they get into the public sewer Such occur rences are rare The attempt to instill a sense of urgency about real hazards is diluted if a man is told to give attention to a long list of things that in fact are irrelevant Be very careful to avoid high H S concentrations flammable atmospheres and hazards of physical injuries Remember that much H S may be released by the stirring up of sludge in the bottom of a structure Obey your senses in respect to irritating gases such as chlorine unconsciousness comes suddenly
140. eech capability is available to transmit stored data over telephone lines 1 2 Compatible The 4250 Flow Meter may be used with the following equipment Equipment Manufactured by Teledyne Isco e 3700 Series Sequential Composite and Refrigerated Samplers e 6700 Series Portable and Refrigerated Samplers e GLS Compact Portable Sampler e 4 20 mA Output Interface e Tipping Bucket Rain Gauge e High Low Alarm Relay Box Non Isco Equipment e IBM Personal Computer or compatible clone with Isco Flowlink software e Laptop Computer with Isco software e YSI600 Multi Parameter Sonde Optional Accessories e 4200T Modem Speech capable with connector and cable e D O dissolved oxygen pH and temperature parameter probes e Extension Cable Vented for the AV sensor length of 25 feet Maximum distance between sensor and flow meter with extension cables is 75 feet e Quick Disconnect Box for AV sensor Increases maximum distance between flow meter and sensor to 1000 feet e Isco Flowlink Software for data acquisition storage and management e Mounting rings for the AV sensor 1 3 Flow Meter Operation 1 4 Area Velocity Sensor Operation 1 4 1 Velocity Measurement 4250 Flow Meter Section 1 Introduction When measuring flow rate the 4250 is normally used with an open channel and calculates flow rate from a combination of mea sured level stream velocity and channel cross sectional area This is the only method of flow measur
141. eep the sensor in a humid environment when not in use and between measurements The plastic bottle that was placed over the end of the sensor when it was shipped is ideal for this purpose Place a piece of moist tissue inside the bottle and slide the bottle over the probe Teledyne Isco supplies a 2 mil 002 thick membrane for use with the D O probe This membrane is recommended for long term monitoring situations only typical of our users appli 4250 Flow Meter Section 4 Options and Accessories cations Use only this thickness membrane with D O probes con nected to Isco flow meters Do not use other thickness of membranes as the Parameter Module used with the probe is cali brated only for the 2 mil membrane and cannot be recalibrated in the field Do not use other membrane thicknesses or inac curacy will result Besides the thinner membranes are very fragile and difficult to install 4 11 4 Probe Installation The D O probe attaches to a sensor carrier bracket that snaps into an Isco mounting ring Use the specific size mounting ring for pipes less than 15 in diameter and the universal mounting ring for pipe sizes greater than 15 diameter Refer to the instruction sheet supplied with the mounting ring M Note When installing the D O probe and its sensor carrier bracket make sure the mounting slots on the sensor carrier are com pletely pressed into the mating tabs on the ring The probe relies on a full engagement bet
142. elected condition which if exceeded will trigger the flow pulse If you select LESS THAN the flow meter will ask you to enter a minimum value for the selected condition If the condition falls below that value later the flow meter will send a flow pulse to the sampler If you select RATE OF CHANGE the flow meter will ask for two values one for the condition and the other for the time interval over which the change occurs After you have determined what condition will signal the sampler and under what circumstances the following menu will appear SELECT OPERATOR e DONE OR e AND SELECT OPERATOR allows you to trigger the sampler from a single condition or from two conditions Suppose you wanted to trigger the sampler from only one condition and that condition was LEVEL You would select level as the condition and then identify what change in LEVEL would be the trigger Then you would select DONE for the SELECT OPERATOR step Selection of DONE will advance the flow meter to the next program step However suppose you wanted to select two conditions either of which would trigger the sampler In such a case you would select OR for the SELECT OPERATOR step The menu will return to the one listing the conditions This will let you define the second condition Now the flow meter will trigger the sampler when either condition changes Finally suppose you had a situation where you wanted changes in t
143. ement that can measure submerged full pipe surcharged and reverse flows and it renders a primary measuring device unnecessary The flow meter provides standard or optional flow related output signals to be used for e Flow proportional sampler pacing and enabling e Transmitting level and flow data to an external device on a serial communications loop e Data transfer to a remote location through a modem e Control of an external 4 20 mA device e Data transfer by a laptop computer The 4250 contains microprocessor controlled circuitry to cal culate level and flow rates from the output produced by the area velocity sensor store user programming instructions operate the display and drive the internal plotter An alphanu meric liquid crystal display LCD shows current total flow level and flow rate information It also prompts you during initial setup or subsequent program changes An internal plotter pro vides a hard copy printout of the information computed plots level or flow rate and generates reports Connectors for other equipment used with the 4250 are on the right side of the flow meter s case The AV sensor is mounted beneath the surface of the flow stream and measures liquid level by responding to changes in hydro static pressure against a solid state pressure transducer It mea sures average velocity ultrasonically by using the Doppler effect This principle states that the frequency of a sound or other wave passed
144. ems convert the data into tones and transmit them over phone lines The equipment on the other end of the line answers with tones through its modem The first modem converts these tones back to digital data and interprets it The 4200T Modem is full duplex and works in the auto answer 4 1 4250 Flow Meter Section 4 Options and Accessories mode It operates at 300 1200 2400 baud This modem has speech and tone capabilities and comes with a connect cable to attach to the telephone line The modem is disabled when an interrogator cable is con nected to the flow meter s interrogator port It cannot receive incoming calls and the alarm dialout will be rendered inopera ble while this cable is connected Disconnect the interroga tor cable in order to use the 4200T Modem 4 1 2 Modems and Flowlink The 4200T Modem communicates with Teledyne Isco s Flowlink Software data storage and acquisition software setting up the flow meter to collect blocks of data Flowlink allows storage and interpre tation of flow meter data Other Flowlink software packages can write reports with this collected data 4 1 3 Connection toa The FCC Federal Communications Commission governs com Telephone Line munications over telephone lines Your local telephone company will provide you with the line between the flow meter and the computer Call them for connection information The FCC requires the following information be published for connecting the modem to t
145. ent baseline compatible with your equipment internal 4 20 mA board only If you select SMOOTHING from the ANALOG OUTPUT menu the following will appear SMOOTHING e NONE e 15 SEC e e 30 SEC 1 MIN The SMOOTHING option lets you stabilize operation of the outputs by preventing a rapid reaction to sudden sharp changes in the condition being monitored that quickly return to normal transients Selection of a smoothing interval will prevent the equipment controlled by the 4 20 mA loop from reacting too quickly too much or operating erratically A low pass filter algo rithm is incorporated in the software If you select the MANUAL CONTROL option from the ANALOG OUTPUT menu the following will appear MANUAL CONTROL OUTPUT 0 EXTERNAL OUTPUT 0 0 0 MA This option lets you control the operation of a 4 20 mA loop to check the operation of equipment controlled by the loop at any level from 0 to 100 After connecting a 4 20 mA output to a con trolled device you can program the flow meter to put a specified current on a specific analog output If you are using the external 4 20 mA converter the Analog Output number will be zero M Note Selecting the MANUAL CONTROL option and programming any one of the ports will prevent the values transmitted by the other active 4 20 mA ports from being updated until the test is completed The other ports will continue to transmit whatever value they held at th
146. equirements of the Canadian Interference Causing Equipment Regulations Ce g n rateur de fr quence radio ISM respecte toutes les exigences du R glement sur le materiel brouilleur du Canada DECLARATION OF CONFORMITY ISM1 A Application of Council Directive 89 336 EEC The EMC Directive 73 23 EEC The Low Voltage Directive Manufacturer s Name Teledyne Isco Inc Manufacturer s Address 4700 Superior Lincoln Nebraska 68504 USA Mailing Address P O Box 82531 Lincoln NE 68501 Equipment Type Environment Laboratory Equipment for Light Industrial Commercial Environments Trade Name Model No Model 4250 Area Velocity Flow Meter Year of Issue 2000 Standards to which Conformity is Declared EN 50082 1 Generic Immunity for Commercial Light Industrial Environment EN 61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Standard Description Severity Applied Performance Criteria IEC 801 2 Electrostatic Discharge Level 2 4kV contact discharge B Level 3 8kV air discharge B IEC 801 3 Radiated RF Immunity 27 MHz to 500MHz A Level 2 3 V m IEC 801 4 Electrical Fast Transient Level 2 1kV on ac lines B CISPR11 RF Emissions Group 1 Class A Industrial Scientific EN 55011 and Medical Equipment We the undersigned hereby declare that the design of the equipment specified above conforms to the above Directive s and Standards as of September
147. er repeated recharging it eventually requires replacement Both desiccants anhydrous calcium sulfate and silica gel are regenerated in the same way but require different tempera tures Calcium sulfate requires temperatures of 400 to 450 F silica gel requires temperatures of 212 to 350 F Either chemical may produce irritating fumes when heated See Appendix D Material Safety Data Sheets for silica gel des iccant information To regenerate all desiccators safely follow these guidelines Always use a vented circulating forced air convection oven in a 5 2 4250 Flow Meter Section 5 Maintenance and Service well ventilated room DO NOT use a microwave oven to recharge the desiccant car tridge Heating the metal cartridge case in a microwave oven will damage the oven Leave the room while heating the desiccant Avoid heating the desiccant longer than necessary Use the recommended temperature Avoid heating the desic cant at higher than recommended temperatures Do not heat the plastic desiccant tube It will melt in the oven 5 2 2 Regenerating the Look at the desiccant canister each time you open the case The Desiccant Canister canister has a window on its side that appears blue or yellow when the desiccant is dry As the desiccant absorbs moisture the window will turn pale pink or green When the window is pink or green you need to regenerate the desiccant or replace it with the spare canister provided in the flow
148. es rain gauge etc you are using with your flow meter After you select one of the choices available to you the flow meter will request that you enter minimum and maximum values for that choice ANALOG OUTPUT PORT 1 4 MA X X units Note that 4 MA in the second line of the display could also be 0 MA if that is what you selected for the current loop minimum in Setup The units are the units of measure appropriate for the option you selected for example feet or meters for level degrees F 2 4 6 Step 3 Parameter to Adjust 4250 Flow Meter Section 2 Programming or C for temperature mg L for dissolved oxygen etc After you have set the minimum value for the port the flow meter will request you to enter a value for full scale or 100 ANALOG OUTPUT PORT 1 20 MA X X units This value causes the port to transmit 100 or 20 mA For example if the data type selected for this output were level and the unit is measuring level in a four foot pipe you would enter a full scale value of four feet If the actual level reading is cur rently two feet the analog output would read 12 mA 50 if the 4 20 mA current range is selected or 10 mA 50 if the 0 20 mA current range is selected The flow meter will then request that you repeat the process of defining the data type and setting the minimum and maximum values for any of the other analog ports you activated previously in Setup This step lets you enter the measu
149. es cires oere guste ds Goo sh a ga G oe E a Qe ea a wend wee ee 3 11 3 6 Area Velocity Sensor Installation 0 0 0 0 0 00 ccc eens 3 12 3 6 1 Level Measurement in Open Channels No Primary Device 3 13 3 7 Rectangular and Trapezoidal Channels 0 00 cece eee eens 3 16 3 8 Mounting Rings for Circular Channels 0 0 e cece eee eee eee 3 16 3 8 1 Spring Rings 2 cme fees eed eee Pte said es eee Pa Pa eed 3 16 3 8 2 Scissors Rings 0 0 cc eee eee nen eens 3 18 3 8 3 Completing the AV Sensor Installation 0 0 0 0 c cee eens 3 19 3 9 Sampler Interface eere dene oe ee eee oe ee ea ee ge eee 3 20 Section 4 Options and Accessories 4 1 A200T Modem ni rie tea desea os Sok wk Wess CR eae ee Td Se Sa re Dd 4 1 4 1 1 How it Works Sica scene Vad teed near E eens awe Saree date 4 1 4 1 2 Modems and Flowlink Software 0 cece eens 4 2 4 1 3 Connection to a Telephone Line 0 c cece eens 4 2 4 1 4 Types of Service srias 2 eee ikon E E a Ps ik Be ae 4 3 4 2 Connection to External Serial Device 20 0c cece eee 4 4 4 3 4 20 mA Analog Outputs External and Internal 0 00000 4 4 4 3 1 External 4 20 mA Output Interface 0 ccc eee 4 5 4 3 2 Internal Multiple Analog Output Board 0 0 00 cece eens 4 6 4 4 Pacing Non Isco Equipment 0 cece eee eee eens 4 8 4 5 Tipping Bucket Rain Gauge 0 ccc teen eee 4 11
150. ess Enter The following display will appear SET X DATA POINT X EXIT TO QUIT ENTER X XX level units X XX area units After you have entered all the data points the flow meter will request that you enter a value for MAXIMUM HEAD and MAXIMUM FLOW The flow meter uses this value to calculate the flow profile for the stream You must know what the maximum head for your flow stream is You should enter a value that is reasonable for your own application rather than the largest value possible The flow calculation is based on this value Use this flow conversion only if you do not wish to calculate flow from area and velocity Normally the 4250 is used in area velocity installations This selection allows you to use the 4250 with a primary measuring device Manning applications a custom flow equation or data points FLOW CONVERSION TYPE e WEIR FLUME EQUATION e e MANNING DATA POINTS e WEIR FLUME weir or flume EQUATION equation MANNING Manning DATA POINTS data points If you select WEIR FLUME the following will appear TYPE OF DEVICE e WEIR ee FLUME e For detailed information on weirs and flumes refer to the Isco Flow Measurement Handbook Consulting the manufacturer of the specific weir or flume is also worthwhile Note that for weirs and flumes there is a preferred location for installing the level measuring device Proper mounting of the level measurement device and
151. essary for enabling AND or whether either condition will enable the sampler OR If you select FLOW RATE FLOW RATE e GREATER THAN LESS THAN RATE OF CHANGE e You would select one of these options and then enter a value as for LEVEL previously The rest of the menus will appear the same as they did for LEVEL and FLOW RATE D O pH TEMPERATURE and RAINFALL all require activation in step 1 and use of the appro priate sensor Only one parameter condition pH D O can be measured by the flow meter at a time pH and D O will not appear on the display at the same time It is possible to program the sampler enable option so that it operates in two different modes latching and non latching To explain this in the non latching mode the sampler will be enabled only as long as the condition that caused the enabling remains outside of normal If the enabling condition returns to normal the sampler enable will turn off until the next time the condition goes outside of normal In the latching mode the sampler will be enabled the first time the condition goes outside of normal and the sampler will stay enabled regardless of any later changes to the enabling condition If this is the case the following menu will allow you to reset the sampler enable feature Note that this menu will not appear unless the condition necessary to enable the sampler has been met and the sampler is currentl
152. eter Current consumption in standby condition is approximately 10 mA In alarm current increases to 190 mA You can connect as many as four alarm boxes to a flow meter if the flow meter is powered from the AC line Do not use the alarm box if your flow meter has a modem or uses Flowlink software through either a modem or laptop computer Use the alarm box with caution in battery powered installa tions as it will significantly increase power consumption In standby condition an alarm box consumes about one ampere hour of battery capacity in four days or reduces capacity approximately 25 In alarm condition one alarm box will com pletely discharge a fresh 4 Ah battery in 21 hours Teledyne Isco recommends using only one alarm box in a battery powered installation and you can expect to change the battery more often 4 12 4 7 1 Installation 4 7 2 Wiring to a 4200 Series Flow Meter 4 8 Parameter Sensing with Isco 4200 Series Flow Meters 4 8 1 Installation of Parameter Probes 4250 Flow Meter Section 4 Options and Accessories The High Low Alarm Relay Box is enclosed in a high strength plastic box and is easily installed Mount the unit with cor rosion resistant hardware through the 2 holes in the stainless steel mounting plate attached to the case Two threaded holes in the case allow the use of either 2 conduit fittings or com pression bushings While the alarm box is suitable for use in damp locations do n
153. ets D 1 Maximum Head 2 42 Measuring Flow Meter Current 1 15 Modem 4 1 Mounting Rings Universal Mounting Ring 3 18 MSDS D 1 Oo Operating Mode 2 11 Operating Principles 4250 1 3 AV Sensor 1 3 Optional Equipment Alarm Box 2 19 Extension Cables 3 11 External Analog Output Interface 4 5 Flowlink 4 12 Internal Multi Analog Output Board 4 6 Mechanical Totalizer 4 29 Modem 4 1 Index 1 4250 Flow Meter Index Index 2 Quick Disconnect Box 3 9 Rain Gauge 4 11 Type E Interface 4 8 Wastewater Sampler 3 20 Optional Outputs Analog 2 19 4 4 Serial 2 22 4 4 P pacing non Isco equipment 4 8 Parameter Probes 4 13 D O Dissolved Oxygen 4 21 pH Probe 4 15 Temperature Probe 4 14 YSI 600 Sonde 4 27 Parameter Sensing 4 13 pH Probe 4 15 Power Sources 3 3 AC 3 5 External 12VDC 3 6 Isco Sampler 3 3 Lead Acid Battery 3 5 Nickel Cadmium Battery 3 4 Programming 2 3 Programming Screens 2 11 Programming Steps Description 2 5 Step 1 Program 2 28 Step 2 Flow Conversion Area Velocity 2 33 Step 2 Flow Conversion Level to Flow Rate 2 36 Step 3 Parameter to Adjust 2 43 Step 4 Reset Totalizer 2 49 Step 5 Sampler Pacing 2 49 Step 6 Sampler Enable 2 52 Step 7 Alarm Dialout 2 55 Step 8 Printer 2 57 Step 9 Reports History 2 59 Programming Worksheets B 1 R Rain Gauge 4 11 Replacement Parts A 1 Reports 2 24 Ribbon Replacement 5 10
154. f dissolved sulfide and at a pH of 7 0 can produce in a chamber with high turbulence a concentration of 300 PPM H S in the air This is considered to be a lethal concentration Many people have died from H3S not only in sewers and industries but also from swamps and from hot springs In one resort area at least five persons died from HS poisoning before the people were ready to admit that HS is not a therapeutic agent Hardly a year passes in the U S without a sewer fatality from H S as well as deaths elsewhere in the world The presence of H S in a sewer atmosphere is easily deter mined A bellows and ampoule type of tester is very satisfactory for the purpose even though it is only crudely quantitative When using a tester of this type do not bring the air to the ampoule by way of a tube as this may change the H S concen tration Hang the ampoule in the air to be tested with a suction tube to the bulb or bellows Lead acetate paper is very useful as a qualitative indicator It cannot be used to estimate the amount of sulfide but it will quickly turn black in an atmosphere containing only a tenth of a lethal concentration Electrodes or other similar electrical indicating devices for HS in air have been marketed Some of them are known to be unre liable and we know of none that have proved dependable Do not use one unless you check it at frequent intervals against air con taining known H S concentrations A suppos
155. ffect Min Exposure Exposure ee i Safe Method Density Limits Highest Sources Air 1 ppm ppm lower upper Concentration GES Sulfur Colorless pun Inflammation of At bottom can Industrial Detectable Dioxide gent odor Suffo the eyes 400 to combine with waste taste and odor cating corrosive 500 ppm imme 100 water to form combus at low concen poisonous diately fatal sulfurous acid tion com tration non flammable mon air pollutant Toluene C5Hy2 Colorless ben 3 14 At 200 500 ppm 200 100 1 27 7 0 At bottom Solvent Combustible to zene like odor headache nau gas indicator CoH 29 sea bad taste lassitude Turpentine CyoHig Colorless Char 4 84 Eye irritation 100 At bottom Solvent 1 Detectable acteristic odor Headache diz usedin odor at low ziness nausea paint concentration irritation of the s kidneys 2 Combustible gas indica tor Xylene CgHi9 Colorless flam 3 66 Narcotic in high 100 ur 7 0 At bottom Solvent Combustible gas indicator Percentages shown represent volume of gas in air For concentration over 0 3 Mostly methane and carbon dioxide with small amounts of hydrogen nitrogen hydrogen sulfide and oxygen occasionally traces of carbon monoxide C 9 4250 Flow Meter Appendix C General Safety Procedures 4250 Flow Meter Appendix D Material Safety Data Sheets D 1 Overview This appendix provides Material Safety Data Sheets for the des iccant used by the 4250
156. from breathing too much Be cautious about strange odors Do not determine percent oxygen in the air There is a danger that the result will influence a man s thinking about the seriousness of the real hazards Most important use ample ventilation and do not enter a potentially hazardous structure except in a good safety harness with two men at the top who can lift you out The following table contains information on the properties of hazardous gases Table C 1 Hazardous Gases Explosive Likely Physiological Effect Max Safe 60 Min Exposure ppm Max Safe 8 Hour Exposure ppm Range by vol in air Limits lower upper Location of Highest Concentration Most Common Sources Simplest and Cheapest Safe Method of Testing C 6 Ammonia NH3 Irritant and 0 60 Causes throat 85 16 25 Near top Sewers Detectable poisonous Col and Concentrates chemical odor at low orless eye irritation at in closed up feed concentrations with characteris 0 05 cough per spaces rooms tic ing odor at 0 17 Short exposure at 0 5 to 1 fatal Benzene CgHg Irritant colorless 2 77 Slight symp 3 000 25 1 3 7 1 At bottom Industrial Combustible anesthetic toms to wastes gas indicator after several 5 000 varnish hours solvents exposure at 0 16 to 0 32 2 rapidly fatal Carbon CS2 Nearly odorless 2 64 Very poison 15 1 3 44 0 At bottom An insecti Combustibl
157. from one body to another is relative to both their motions As the two approach each other the frequency increases as they recede the frequency decreases The motion of the bodies relative to each other is added to or subtracted from the frequency of the wave A familiar example is this You are in a car at a railroad crossing waiting for a train As the train approaches it sounds its whistle in warning The whistle sounds a certain pitch to you As the train passes through the crossing the pitch drops noticeably The transmitted frequency of course is always the same but the Doppler effect will make it seem higher or lower to you because of the movement of the train toward or away from you The probe s ultrasonic transducer transmits a high frequency pulse into the flow stream Bubbles and particles carried by the stream reflect the pulse back to the receiving transducer The reflected pulse will have a different frequency depending on whether the bubbles or particles are moving away from or toward the sensor 1 3 4250 Flow Meter Section 1 Introduction 1 4 2 Pressure Transducer Operation 1 5 Three Sensors Available Standard and Extended Range Sensors This frequency difference is converted by the flow meter into a velocity reading and the reading can indicate either forward or reverse flow The pressure transducer in the area velocity sensor contains a resistance bridge on a silicon diaphragm Pressure against one
158. h cases make sure you measure depth at a point inside the cone In large channels you may have to measure several feet upstream from the sensor Measure the diameter of the pipe Then measure from the top center of the pipe to the liquid surface and subtract this distance from the pipe diameter to get the level If the stream is not calm average the measurements from the crest and the trough of the waves Measure some distance upstream from the installed AV sensor We suggest using a distance equal to the depth of the flow stream For example if the flow stream is one foot deep you would measure level at a point one foot upstream from the sensor Do not measure right at the sensor as the profile of the sensor and the mounting strap may cause a jump or localized rise in the level If you cannot measure upstream after instal lation of the sensor and strap measure the level before installing the sensor Do not measure downstream from the sensor wees Jump in stream over sensor A V Sensor lt i _ E gt gt Side view of channel If the level is low enough that you can see a visible jump or dis turbance in the liquid surface where it flows over the sensor and mounting ring you should measure the level with the sensor and ring out of the stream Changes in channel shape that affect the stability of the flow such as elbows outfalls inverts etc should be considered when locating the sensor Avoid installation in a
159. he External 4 20 mA Output Interface has its own case and AC power supply Commercial power 120 VAC must be available for this device Battery operation 12 VDC is not feasible due to voltage and current demands It comes with a line cord con nectors and two interconnect cables One cable has 6 pin M S connectors on both ends This cable connects the input of the 4 20 mA Output Interface to the flow meter Interrogator connector The other cable has a three pin plug on it that connects to the output connector of the 4 20 mA Output Interface This cable ends in three pigtailed wires you connect to the equipment you want to control with the 4 20 mA Output Interface Table 4 1 4 20 mA Output Interface Specifications Power 120 VAC 8 Amp Output Connector 3 pin male plug Pin A current out Pin B current out Pin C not used Output Accuracy At 72 F 22 C 0 25 of full scale Full Oper Range 0 5 of full scale Operating Temperature Range 0 to 140 F 18 to 60 C Resolution 0 1 of full scale Input Connector 6 pin male M S Pin B pulse input Pin F pulse input Pins A C D E NC Isolation Output current optically isolated from flow meter T Fusing Amp internal on AC line Adjustments Calibration Factory calibrated when used within range no adjustment needed Maximum Distance 1 500 ft 457 3 m using 18 AWG wire 4 5 4250 Flow Meter Section 4 Options and Acces
160. he YSI 600 is found in Section 2 of this manual Information about the YSI 600 Sonde is found in the YSI manual 4 28 4250 Flow Meter Section 4 Options and Accessories 4 14 Mechanical Totalizer A mechanical totalizer is available for the 4250 that consists of a seven digit non resettable mechanical counter mounted in the front panel It must be ordered with the flow meter The totalizer advances according to program selections for units of measure and the maximum flow of the primary device used The totalizer is internally set to advance at 400 of the rate of the display totalizer Consequently you must multiply the number shown on the mechanical totalizer by 100 to determine the actual value for total flow 4 29 4250 Flow Meter Section 4 Options and Accessories 4 30 4250 Flow Meter Section 5 Maintenance and Service 5 1 Routine Maintenance and Minor Service 5 1 1 Care of the Flow Meter Case 5 1 2 Care of the Case Seal 5 1 3 Preventing Moisture Damage The following sections provide routine maintenance and ser vicing instructions Included are sections on cleaning the flow meter reactivating the desiccators maintaining the bubble line servicing the internal printer elementary troubleshooting and servicing CMOS circuitry Teledyne Isco recommends that you become familiar with the maintenance procedures presented here While the 4250 is rug gedly built to withstand severe field conditions it will function
161. he external desiccant cartridge You should route this tubing to a place higher than the maximum possible level of the flow stream This will prevent any water from entering the vent tube of the AV sensor in case of accidental submersion of the flow meter Vinyl tubing can be pur chased locally or from Teledyne Isco If you use the Quick Disconnect Box to extend the distance between the flow meter and the sensor attach the vinyl tubing to the desiccator cartridge vent on the Quick Disconnect Box rather than the vent on the flow meter Presumably the flow meter is mounted safely away from the flow stream if you are using the Quick Disconnect Box If you cannot mount the Quick Dis connect Box far enough above the flow stream to ensure against accidental submersion when the flow stream is high you should protect the desiccator and the reference port by venting them with vinyl tubing to a point the water cannot possibly reach Remember that water or other blockage inside the sensor s vent tube can ruin the sensor It is even more important to protect the Quick Disconnect Box than the flow meter because the AV sensor will be directly attached to the Quick Disconnect Box When connecting the sensor to the flow meter you may use an extension cable which would offer some protection to the sensor 4250 Flow Meter Section 3 Installation 3 4 Quick Disconnect Box You can install the flow meter as far as 1 000 feet from the AV sensor if you use
162. he flow meter wher ever possible See Section 1 Table 1 6 Even with these circumstances you may expect significantly shorter charge life from your battery To determine the effect of this extra current draw on battery life please refer to the sec tion How to Make Battery Calculations at the end of Section 1 The following menus determine the behavior of the 4 20 mA current outputs If you select ANALOG OUTPUT another term for the 4 20 mA Output and the flow meter is equipped with the optional internal board or the 4 20 mA external accessory has been turned on RANGE SMOOTHING and MANUAL CONTROL will appear ANALOG OUTPUT e EXTERNAL 4 20 MA e RANGE e SMOOTHING N CAUTION If you do not have the proper hardware installed and you press 4 2 0 and the number of analog outputs is not zero the external 4 20 mA converter will not work properly If this occurs return to the 4 2 0 option and at the prompt enter 0 for the number of outputs activated This will restore the exter nal 4 20 mA converter capability 4250 Flow Meter Section 2 Programming MANUAL CONTROL will appear if you continue moving to the right RANGE will appear with the ANALOG OUTPUT menu if the optional internal 4 20 mA converter is present in the flow meter If you select RANGE the following will appear OUTPUT RANGE e 0 20 MA 4 20 MA This menu lets you select the current value for zero perc
163. he phone line This equipment complies with part 68 of the FCC rules On the case of this equipment is a label that contains among other information the FCC registration number and ringer equivalence number for this equipment If requested this information must be provided to the tele phone company This equipment uses the following USOC jacks USOC RJ11C The REN is used to determine the quantity of devices that may be connected to the telephone line Excessive REN s on the telephone line may result in the devices not ringing in response to an incoming call In most but not all areas the sum of REN s should not exceed five 5 0 To be certain of the number of devices that may be con nected to the line as determined by the total REN s contact the telephone company to determine the maximum REN for the calling area If this equipment causes harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required If advance notice isn t practical the telephone company will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary The telephone company may make changes in its facil ities equipment operations or procedures that could affect the operation of the equipment If this happens the 4 2 4 1 4 Types of Service 4250 Flow Meter Section 4 Options
164. hen the plastic catch re engages the cover 4250 Flow Meter Section 5 Maintenance and Service Figure 5 9 Location of the Three Fuses 5 5 3 Display Warnings 5 5 4 System Reset The LCD will show various warnings and error messages to warn of problems in the program or difficulties inside the flow meter Some messages request routine maintenance others point out programming errors still others indicate serious internal diffi culties Following are typical warning messages displayed by the LCD CHECK PRINTER FUSE PRINTER JAMMED PAPER OUT If the flow meter does not appear to be operating normally you can try to restart the processor by turning the unit off waiting a few minutes and then turning the unit back on If that doesn t work you can reset the software N CAUTION This procedure will cause most programmed entries and accu mulated data stored in the 4250 to be lost and the flow meter will revert to factory default settings If this operation is per formed it will be necessary for you to reprogram the unit to meet the specifications of your installation Use Print Program to keep a record of how you programmed the unit To reset the 4250 software 1 Press Print Program for a record of your program setup 2 Turn the flow meter off 3 Hold down the 4 and Exit Program keys simultaneously 5 13 4250 Flow Meter Section 5 Maintenance and Service 5 6 Preliminary 5 14 Troubleshooting Steps 5 6
165. hen you select or advance to step 6 the following display will appear SAMPLER ENABLE MODE e DISABLE e ENABLE e CONDITIONAL e STORM Flowlink may also appear The Flowlink menu option will not appear unless Flowlink software is installed DISABLE means that the sampler will be permanently inhibited by the flow meter This condition will remain until you change it in this program step or if you are using Flowlink until it is over ridden by a command from Flowlink Select the DISABLE option with care it will make the sampler appear to be inoperative and that could easily be misinterpreted as an equipment failure ENABLE means that the sampler is permanently enabled free to run its own program without any control from the flow meter This condition will remain until you change this menu option or until it is overridden by a command from Flowlink The STORM option will not appear unless you turned on rainfall measurement in step 1 STORM selection is what you use when you want to monitor storm water runoff STORM enabling is really a combination of conditions First enter a value for LEVEL in the flow stream Second enter a value for RAINFALL Third enter an amount of time over which the rainfall occurs Finally you enter a time since the last rainfall You must have an Isco 674 Rain Gauge or approved equal to measure rainfall The following menus are the STORM sequence LEVEL GREATER THAN X XXX FT
166. hly humid Fumes lead acetate tions Exposure Death in few from blast solution for 2 to 15 min at minutes at ing under 0 01 impairs 0 2 Exposure some con sense of smell to 0 07 to 0 1 ditions Odor not evident rapidly causes Sludge gas at high concen acute poison trations Color ing Paralyzes less Flammable respiratory center Methane CH4 Simple asphyxi 0 55 Acts mechani Probably no limit 5 0 15 0 At top increas Natural 1 Combustible ant cally to deprive provided oxygen ing to certain gas sludge gas indicator Colorless odor tissues of oxy percent age is suf depth gas manu less tasteless gen Doesnot ficient for life factured 2 Oxygen defi flammable support life gas sewer ciency indica gas Strata tor of sedi mentary origin In swamps or marshes Nitrogen No Simple asphyxi 0 97 Physiologically Near top but Sewer gas Oxygen ant Colorless inert may be found sludge gas deficiency tasteless near bottom Also issues indicator Non flammable from some Principal constit rock strata uent of air about 79 Nitrogen NO Colorless 1 04 60 to 150 ppm 50 10 Near bottom Industrial NO detector Oxides cause irritation wastes tube N20 Colorless and coughing Common sweet odor 1 53 air pollut Asphyxiant ant NO Reddish brown 1 58 Irritating odor 100 ppm dan Deadly poison gerous 200 ppm fatal Oxygen O2 Colorless odor 111 Normal air c
167. iece Bree QQ ee lt ee D ce 5 ee 18 o o 21 o 2 37 4250 Flow Meter Section 2 Programming 2 38 If you press the right arrow key several times the sizes shown below will move onto the screen SELECT PALMER BOWLUS SIZE e 24 ee 27 ee 30 ee 48 e If you select LEOPOLD LAGCO this will appear LEOPOLD LAGCO FLUME SIZE ogreeGiece Bree Oreo DM ee 5 ee QB eeD oe If you press the right arrow key several times the sizes shown below will move onto the screen LEOPOLD LAGCO FLUME SIZE e 24 ee 30 e If you select HS the following display will appear HS FLUME SIZE 0 4 0 5 990 6 990 8 9 1 0 s If you select H the following will appear H FLUME SIZE eD eoe Thee fieeDeeD DieoZiced die If you select HL the following will appear HL FLUME SIZE e 2 0 e e 2 5 e e 3 0 e e 3 5 e e 4 0 If you select TRAPEZOIDAL this will appear TRAPEZOIDAL SIZE e LG 60 V 2 45 WSC 12 45 SRCRC e This completes the section on WEIR FLUME flow conversions Returning to Step 2 SELECT FLOW CONVERSION If you select EQUATION the following will appear ENTER EQUATION UNITS Q XXX XXXH X XX XXX XXXH X XX This step allows you to enter an equation that is appropriate for your flow situation The equation is expressed in the general form of Q k1H k2H where Q flow rate k1 a constant H level or head
168. in female M S Connects flow meter to a Isco Rain Gauge or YSI 600 Multi Parameter Sonde YSI 600 Sonde Also provides output to High Low Alarm Relay Box Custom Interrogator 6 pin female M S Provides serial data in out and power Can also be used with 4 20 mA Output Interface Modem 5 pin male M S Connects flow meter to telephone line for remote data transmission This con optional nector will only be present on units that have the optional modem installed Provides analog data output from the flow meter to external non Isco control 6 pin male M S and recording devices Analog Output optional Parameter 7 pin female M S Connects flow meter to parameter sensor temperature pH or D O Note that you can only have temperature and one parameter pH or D O at the same time Area Velocity Sensor 9 pin custom spe cial connector Connects flow meter to area velocity sensor Also provides connection for inter nal vent tube from sensor Table 1 2 4250 Technical Specifications Physical and Electrical Size 16 high x 111 2 wide x 101 2 deep 40 6 x 29 2 x 26 7 cm without power source attached Weight 17 Ib 4 oz 7 8 kg Material High impact molded polystyrene structural foam Type Self certified NEMA 4X Enclosure 1 8 4250 Flow Meter Section 1 Introduction Table 1 2 4250 Technical Specifications Display Type 2 line 40 character line alphanumeric dot matrix l
169. iquid crystal Power 12 to 14 VDC 14 mA average at 12 5 VDC printer set at 1 per hour 1 minute level reading interval 5 minute velocity reading interval Typical Battery Life Standard 4 Ampere hour nickel cadmium battery 8 to 11 days with printer set at 1 per hour 1 minute level reading interval 5 minute velocity reading interval 15 days with printer turned off Operating Temperature 0 to 140 F 18 to 60 C Storage Temperature 40 to 140 F 40 to 60 C Additional Power Required for Optional Equipment Modem 60 mA maximum during operation 0 1 mA maximum standby High Low Alarm Relay Box 10 mA standby typical 190 mA both relays operated Internal Printer Chart Speeds Ribbon Operating Speed Off 1 2 1 2 or 4 inches per hour See Table 1 5 for longevity in days 19 7 ft 6 m black nylon replaceable 1 5 lines per second at 68 F 20 C Character Size 0 09 high x 0 07 wide 2 4mm x 1 7 mm 12 pitch Printer Recording Span Chart Resolution Display Resolution Paper User selected from 1 4 ft 3 6 cm to over 30 ft 9 1 m with multiple over ranges 1 240 of selected recording span 0 001 ft 0 3 mm 4 5 wide x 58 ft 11 4 cm x 17 7 m plain white paper replaceable Printer Reliability 2 5 million lines MCBF mean cycles before failure Reports Printed Program selections interval activity reports flow
170. it slightly loosen ing the ribbon Hold the detecting lever away from the spool while gently pulling the spool until it comes free from its shaft Do the same with the other spool Lift the chart and take up spool out of the way and remove the ink ribbon from the printer mechanism noting how it threads through the unit Thread the new ink ribbon through the printer mecha nism 5 4 3 Do Not Disassemble or Lubricate the Printer 5 5 Servicing And Troubleshooting 5 5 1 Disassembling the Flow Meter 4250 Flow Meter Section 5 Maintenance and Service 7 Locate the three small pins on each spool of the ink ribbon and turn the spools so the pins face the gears on the two ribbon shafts 8 Replace the two spools on their respective shafts pushing the detector levers out of the way so the spools will easily re engage their gears 9 Gently rotate each spool to tighten the ink ribbon Rein stall the paper take up roll if necessary You do not need to oil the printer mechanism As long as you keep the lid closed keep the inside of the cabinet clean and do not abuse the printer in any way it should function normally Teledyne Isco recommends you make no attempt to oil or disas semble the mechanism if it malfunctions Oil attracts dirt some oils can become gummy over time and may cause parts to bind or stick Do not attempt to disassemble the printer mechanism as you may bend or distort the frame or com pone
171. itions are met The probe must be properly submerged in solution and there must be no air trapped under the probe membrane or the reading may become incorrect and or erratic Do not touch the probe until after you have performed step 6 To calibrate the pH probe with the flow meter 1 Go to program Step 1 PROGRAM SETUP and select PROGRAM 2 Step through the units of measure with the Enter key until you reach the menu that says pH UNITS NOT MEASURED pH Select pH You must do this in step 1 or the pH menu will not appear later 3 Now go to step 3 PARAMETER TO ADJUST NONE LEVEL pH other selections may appear and select pH If the pH menu does not appear in step 3 go back to step 1 to make sure you have turned it on Then the pH selection of calibrations will appear 4 Place the pH probe in the appropriate buffer solution until the stainless steel body is one inch beneath the surface 5 If you select 4 amp 7 the following screen will appear Cali bration with the other menu options 7 amp 10 or 4 7 amp 10 is essentially the same as shown below For the other menus see Section 2 RINSE PROBE AND PLACE IN 4 0 pH SOLUTION PRESS ENTER WHEN STABLE X XX pH 6 Wait for the reading to stabilize this may take from 30 sec onds up to 5 minutes When the probe has stabilized press Enter and the following display will appear 4 17 4250 Flow Meter Section 4 Options and Accessories RINSE P
172. l voltage of the battery at the end of this time period is the discharged cell voltage 10 volts for nickel cadmium and 10 5 volts for lead acid types Batteries are fully discharged well before the terminal voltage drops to zero volts Isco batteries are rated at 4 ampere hours for the nickel cadmium and 6 5 ampere hours for lead acid types Convert the battery current capacity into milliamperes and then divide this figure by the average current drawn by the unit This will give you a number in hours Divide that figure by 24 and you will have the number of days The published ampere hour figures do not mean that you can expect to draw 4 amperes from the nickel cadmium battery or 6 5 amperes from the lead acid battery for one hour At the one hour rate discharges are typically less than half the ten or twenty hour rate To convert ampere hours to milliamperes multiply by 1 000 Examples 4 ampere hours x 1 000 4 000 mAh 6 5 ampere hours x 1 000 6 500 mAh If you divide this figure by the average current of the flow meter say 15 mA you will have 4 000 15 266 67 hours Divide this number by twenty four to get days 266 67 hours 24 11 1 days For considerations of safety we suggest you subtract 10 from this number 100 5 for 95 capacity and 5 for a reserve at the end of discharge 11 1 1 1 10 days This is the battery expectancy for a nickel cadmium battery with a 15 mA continuous average drain with
173. lack plastic elbow fitting mounted on the side of the case near the top This desiccator keeps moisture out of the AV sensor s reference port This port connects to a tiny tube that goes through the case and the sensor cable all the way to the transducer Like the case desiccant canister the external desiccant cartridge should be colored blue If it is violet or pinkish you need to regenerate it 3 1 4250 Flow Meter Section 3 Installation 3 2 You will need to remove the particles from the cartridge for regeneration you cannot regenerate the cartridge like the case desiccant canister The cartridge is plastic and will melt See Section 5 for details on regenerating the desiccant cartridge N CAUTION Be sure to remove the red plastic cap from the desiccator car tridge when you install the flow meter If you do not the AV sensor will be unable to reference to atmospheric pressure and inaccurate level measurements will result Many flow meters are installed in damp environments in atmo spheres containing corrosive fumes These fumes can form weak acids with moisture Keeping the desiccators active and the door closed will prevent these fumes from damaging the flow meter Keep the lid closed and latched except when you are installing the unit or changing the program Do not operate the flow meter with the door open or the desic cators saturated If you leave the door open moisture in the air will quickly saturate the desic
174. ll as other Isco probes such as the submerged probe and area velocity probe require complete con tinuous submersion in the flow stream for proper operation Dry operation can damage the pH and D O probes The YSI Sonde only may be suspended vertically in the stream Teledyne Isco offers a series of rings that provide mounting for the probes in round pipes e Each probe snap mounts to a specialized sensor carrier e The sensor carrier then attaches to the rings or mounting straps 4 13 4250 Flow Meter Section 4 Options and Accessories 4 9 Temperature Probe 4 14 e The probe cable is carefully routed out of the stream e Only the temperature probe can connect directly to the flow meter s parameter probe connector e The pH and D O probes both connect to parameter modules amplifiers The pH probe connects to the 201 pH Module and the D O probe connects to the 270 D O Module The modules are not interchangeable M Note The 270 D O module has been discontinued Probes service kits and accessories are still available to maintain existing field units Isco flow meters are built with one parameter sensing port and can only sense temperature plus one parameter at a time unless you use the YSI Sonde You must select temperature D O with temperature or pH with temperature If you want to change probes later you can but you will need to reprogram the flow meter Note that selection of either pH or D O in step
175. ll from the spool with the other To install the new chart paper After you remove the empty roll 1 10 11 12 13 14 15 Slide the new roll onto the feed spool so it unrolls from the back side facing away from you Line up the slots in the cardboard tube with the raised guides on the spool Reattach the white end cap by wedging the two catches on the end of the spool into the two slots on the white end cap Peel the paper back gently so it will unroll freely Using the knife or scissors cut off the end of the roll if it is torn Fold the paper over on itself so the end is straight and stiffer than a single layer of paper would be Unroll a few inches of the paper and set the roll on top of the cabinet Use your fingers to feed the paper down the back of the internal printer to where it touches the roller Make sure the paper gets past the lever for the paper sensing switch Press the Chart Advance key and hold it until the paper comes through the printer mechanism When the paper comes through reinstall the feed spool with the new roll on it by snapping it into the printer assembly Run a few inches through the printer using the Chart Advance key then unfold the end Put the cardboard tube from the empty roll on the take up spindle and reattach the white end cap by wedging the catches on the end of the spool into the two slots on the white end cap Use the
176. lled and pacing has been downloaded from Flowlink If you select DISABLE for sampler pacing the flow meter will be effectively disconnected from the sampler The sampler will run its program as if there were no flow meter Selection of DISABLE 2 49 4250 Flow Meter Section 2 Programming 2 50 will also cause the flow meter to advance to the next Program step If you select VOLUME for sampler pacing the following will appear SAMPLER PACING ENTER PACING VOLUME XX XXXX CF e Other units of measure may appear here The range for pacing is max flow divided by 100 minimum or 10 000 times max flow maximum If Flowlink appears for sampler pacing the operation of sampler pacing has been determined by choices made in Flowlink Isco s proprietary data acquisition and storage software Flowlink con trols the flow meter remotely via phone lines and a modem or locally with a laptop computer and cable In any event if the sampler pacing definition is controlled by Flowlink it can only be changed through Flowlink If you select CONDITIONAL for sampler pacing the following will appear CONDITION e LEVEL VELOCITY FLOW RATE RAINFALL DO pH TEMPERATURE YSI pH YSI DO YSI CON DUCTIVITY and YSI TEMP may also appear Note that all the conditions shown above are in parentheses Which ones actually appear depends on your previous programming selections At least one of these op
177. lls and set up the system to reset the alarm condition by dialing back from the remote telephone All 4250 Flow Meters have a built in printer The printer is more than just a printer as it is capable of plotting linear data along with printing alphanumeric letters and numbers messages In this step you set the speed for the chart to advance from 1 2 to 4 per hour Chart speed is set according to the amount of resolution you want to see on the chart If there is much activity on the chart you would generally choose a faster speed so the marks are more spread out and are easier to interpret If there is little activity on the chart and you want the flow meter to run for long periods without having to change the chart paper roll you would probably pick a slower speed The flow meter is capable of plotting three separate data lines on the chart in addition to the alphanumeric messages These lines may indicate various things such as level flow rate pH dis solved oxygen or temperature Note that you must have the appropriate sensors for pH DO and temperature to make use of these plots Rainfall is printed as a bar graph The printer is capable of plotting over ranges for the data lines it plots You can 2 3 9 Step 9 Reports History 2 4 Interpreting the Program Screens 2 4 1 Operating Mode 4250 Flow Meter Section 2 Programming tell when the printer is in over range if a data line goes off the chart on the right side
178. lock of black conductive foam If purchased replacement compo nents do not come in marked protective packaging do not use them They may already be destroyed Once assembled and soldered printed circuit boards are easily damaged by improper repair procedures Do not attempt to remove components particularly ICs from printed circuit boards unless skilled at this procedure After a defective component is replaced the unit still may not work if excessive heat or pressure has broken the foil traces or pulled the cores from holes on the board 5 17 4250 Flow Meter Section 5 Maintenance and Service 5 8 Software Updates 5 8 1 Updating the Flow Meter Software Update Isco Instrument Software installs software in Isco instru ments and modules This application will transfer a binary file from your PC to the instrument s flash memory Updated binary files are available from Teledyne Isco when enhancements have been made to the instrument software Contact the factory for help with obtaining these files N CAUTION Updating the instrument software or resetting the instru ment may completely erase readings and reports stored in the instrument s memory Collect the data from the instru ment before proceeding The flow meter should be powered and turned on Connect your computer to the flow meter using the Computer Connect Cable Interrogator Cable and start the program Update Isco Instrument Software A Update Isco In
179. low meter with an Isco Automatic Waste water Sampler Typically the flow meter signals the sampler to take a sample after a certain volume has passed It might also occur after a certain condition or set of conditions has either changed or been met This step allows you to determine that control There are several possible options DISABLE CONDI TIONAL VOLUME and FLOWLINK DISABLE will keep the sampler from receiving a flow pulse from the flow meter VOLUME allows the flow meter to signal the sampler whenever a specific flow volume has passed by Flowlink this option will only appear if you are using Flowlink software allows the sampler to be signalled from the flow meter as a result of condi tions determined by Flowlink Flowlink is Teledyne Isco s proprietary data acquisition and management software Flowlink works with personal computers modems and laptop computers to monitor flow meters from a distance Consult the factory for more details about Flowlink VOLUME makes the flow meter pace the sampler after a spe cific volume passes through the stream CONDITIONAL allows pacing of the sampler by the flow meter when a particular condition has been met or has changed Among these conditions are changes in level flow rate temper ature rainfall if you are using the optional rain gauge sensor D O dissolved oxygen or pH You can also use a pair of condi tions or if you are using the YSI 600 sonde you can select mul ti
180. ls a ee 2 2 2 2 Programming Procedure 000 eee en een e ene 2 3 2 3 Description of Program Steps 0 20 0 cee eee eens 2 5 2 3 1 Step 1 Operating Mode 0 teen eens 2 5 2 3 2 Step 2 Flow Conversion Type 0 e cece cece eee eens 2 5 2 3 3 Step 3 Adjust Level Parameters 000 e cece eee ens 2 7 2 3 4 Step 4 Reset Totalizer 0 cette 2 8 2 3 5 Step 5 Sampler Pacing 0 0 ccc eee eens 2 9 2 3 6 Step 6 Sampler Enable 0 ccc een eens 2 9 2 3 7 Step 7 Alarm Dialout Mode 0 ccc eee enna 2 10 2 38 Step 8 Printer gt nsen eats Ate ana a e ed A boda decd Sebastes Gas 2 10 2 3 9 Step 9 Reports History 0 0 ccc cette eas 2 11 2 4 Interpreting the Program Screens 0 ccc teens 2 11 2 4 1 Operating Mode 64 2654 9g e ep ceeds Swed ha Be Sop E eee Stee eed ted 2 11 2 4 2 Optional Outputs seo sese ee eae ce tenes 2 19 24 3 Step L Program co ost 2 shah OL A Sie ee heh Ese 2 28 2 4 4 Step 2 Flow Conversion Area Velocity Only 0 000 2 33 2 4 5 Step 2 Flow Conversion Level to Flow Rate 008 2 36 2 4 6 Step 3 Parameter to Adjust 0 0 0 ccc eens 2 43 2 4 7 Step 4 Reset Totalizer 0 0 0 teens 2 49 2 4 8 Step 5 Sampler Pacing 0 ccc cette nas 2 49 2 4 9 Step 6 Sampler Enable 0 0 tenes 2 52 2 4 10 Step 7 Alarm Dialout Mode 20
181. m ao Hujulem 10117 APLWAAG uruiem 10117 ON ON ON S N S p uano Buruseny10113 apluang Bulwem jso1s3 PN V BW XxX Xa qeIsuaym U7 SS ld N VOW XXX q2s u ym1 7U7 SS 4d Hd XX X IqLIsu yM 7U SS 4d Hd XXX 2iqeisuaym 1U SS Jd Buneaq ep Buneiqyed uonnjos O y yd uladejd pueagoid asury uolnjos O y yd ul adejdpue aqoid asuly Ly A A Kpe 1 UayM W7UF Ssald Apeauaym 1977 SS Ad OLHd 8 ZH pH OL Hd ZH ZHd 9 pH dnd uoleiqije gt ulaqoid a2e q uonnjos JW XXX Ul aqold Jd uonesqie gt Ud 009 I SA z A 5 OG MINIDNPUOD Yd UON BHww XXX V5W XXX gt ayesqujey OLsayewuesed 009 ISA ainssaig DUJaWOIeg sqy pepueis o a x A A O d yd 009 ISA PA2 SUON apni y ednsseid JUZAW eg sqy pe pues O A asnfpy oL Bjaweleg uolesql e gt O q 009 ISA A SHBWeIed JaAa7 ysn p Y E d s weiboid o q AIPNPUOD Yd DUON gt ayeique OLsayawesed 009 ISA Figure 2 5 YSI 600 Sonde Calibration Flow Chart 2 48 2 4 7 Step 4 Reset Totalizer 2 4 8 Step 5 Sampler Pacing 4250 Flow Meter Section 2 Programming If you select step 4 the following will appear RESET TOTALIZER e YES e NO This step allows you to reset the flow meter s internal flow total izers All models have the capability of maintaining a separate totalizer for the time the sampler is enabled through the sampler enabling feature step 6 The 4250 flow meter because it can measure for
182. may be retained on the product The user of the product must identify the hazards associated with the retained material in order to assess the waste disposal options Dispose according to federal state and local regulations Section 14 Transportation Information U S Department of Transportation Shipping Name Not classified as a hazardous material Not regulated Transport Canada Product Identification Not classified as a hazardous material Not regulated Number Section 15 Regulatory Information Not meant to be all inclusive selected regulations represented TSCA Listed Yes OSHA See section 8 above NIOSH See section 8 above Animal tests conducted in 1976 1978 18 month exposure at 15 mg m showed silica deposition in respiratory macrophages and lymph nodes minimum lung impairment no silicosis ACGIH See section 8 above DOT Not classified as a hazardous material Canadian Hazardous Products Act This product is not classified as a controlled product under the regulations pursuant to the Federal Hazardous Product Act e g WHMIS Canadian Environmental Protection Act All ingredients of this product are notified to CEPA and on the DSL Domestic Substances List Section 16 Other Information D 5 4250 Flow Meter Appendix D Material Safety Data Sheets D 6 Multisorb Technologies Inc Silica gel Indicating February 14 2009 Page 5 of 5 HMIS Haz
183. mmable Limits Not flammable Lower Flammability Limit Not applicable Upper Flammability Limit Not applicable Auto ignition Temperature Not applicable Hazardous Combustion Products Not applicable Extinguishing Media Use extinguishing media that is appropriate for the surrounding fire Silica gel is not combustible Fire Fighting Instructions Not combustible Unusual Fire and Explosion Hazards None Explosion Data Not sensitive to statistic discharge Not sensitive to mechanical impact Section 6 Accidental Release Measures Spill Sweep or vacuum up and place the spilled material in a waste disposal container Avoid raising dust Wash with soap and water after handling Section 7 Handling and Storage Handling Avoid raising dust and minimize the contact between worker and the material Practice good hygienic work practices Storage Store in a cool dry location Keep in sealed containers away from moisture The silica gel will readily adsorb moisture Section 8 Exposure Controls Personal Protection Engineering Controls Use exhaust ventilation to keep the airborne concentrations below the exposure limits Respiratory Protection Use NIOSH approved respirator when the air quality levels exceed the TLV s Skin Protection Light cotton gloves will protest against abrasion and drying of the skin Eye Protection Safety glasses Exposure Limits D 3 4250 Flow Mete
184. moisture entering the case 4250 Flow Meter Section 3 Installation 3 5 Extension Cables The 10 foot range and low profile AV sensors are provided with 25 feet of cable The 30 foot range AV sensor is provided with 50 feet of cable If these lengths are insufficient it is possible to connect an extension cable between the flow meter and the AV sensor Teledyne Isco provides a 25 foot extension cable for either sensor CAUTION The AV sensor extension cables and the AV sensor cable can not be cut for any reason or they will be ruined The connec tors are factory sealed and neither the cable nor the vent tube inside can be satisfactorily spliced in the field Teledyne Isco does not recommend connecting more than two extension cables together to exceed the 75 foot limit 100 ft for the 30 ft sensor Increasing the length of the vent tube beyond 75 feet slows the response of the pressure transducer and this may cause measurement errors For greater distances use the Quick Disconnect Box and a custom built cable CABLE NUT __ CASE WASHER BUSHING BODY RUBBER BUSHING WASHER OUTER NUT Figure 3 6 Assembling a Compression Bushing The AV sensor uses a differential pressure transducer and two ultrasonic transducers The cable connecting the AV sensor to the flow meter contains a small tube that references the pressure transducer to atmospheric pressure This allows a true differ ential pressure measurement unaffecte
185. n the Warranty page at the back of this manual Our Technical Service Department has trained technicians and specially designed equipment necessary for timely efficient repair of the 4250 Flow Meter If you still wish to attempt repairs the Customer Service Department is available to provide additional advice and information on ser vicing When attempting to isolate problems within the unit you should assume that the CPU and memory are working properly until attempts to find problems in the peripheral circuitry have been exhausted This is for two reasons e The likelihood of failure is far greater on transistor drive circuits heavier currents are handled here than on the CPU or memory e The CPU and memory are not serviceable and must be replaced if found to be faulty 4250 Flow Meter Section 5 Maintenance and Service Following are suggested areas to check before attempting to service the 4250 s circuitry Telephone consultation with Cus tomer Service is strongly recommended Look for the following 1 Verify that the problem is in the flow meter and not caused by the area velocity probe probe cable Quick Disconnect Box power supply or other equipment connected to the flow meter The flow meter could be all right and will appear to mal function because of clogged or leaking tubes or other com ponents check these first Pay particular attention to the connectors and cable from the submerged probe 2 Check all
186. n the hydro static conditions on which the level measurements and level to area conversions are based The sensor was designed to expose a small frontal area and a streamlined profile to the flow and that reduces the possibility of accumulating deposits of solid materials Rarely organic materials may become jammed inside the AV sensor s liquid ports If this material swells as it becomes satu rated with water it may cause inaccurate pressure transmission to the level sensor In the unlikely event that both entrance ports in the AV sensor become blocked with material that does not permit the pressure above the probe to be transmitted to the pressure transducer you can clean the sensor with the following procedure 1 Remove the AV sensor from the flow stream 2 Scrape any accumulated solids from the exterior of the sen sor body with a brush 3 Remove the three screws holding the sensor carrier plate to the bottom of the probe Be careful not to lose the small 5 5 4250 Flow Meter Section 5 Maintenance and Service spacer disk between the the sensor mounting plate and the screw at the front of the sensor Flush the underside of the sensor with water Do not remove the protective disk and round gasket from the level sensor unless you can see that the ports are blocked with solids If the ports are clogged and do not clear with the running water you may have to carefully remove the disk and gas ket Removing th
187. nal modem If you do not have the modem no menus concerning dialout will appear If after filling out this chart you cannot make some menus appear that you need recheck your early steps to see that you have not accidentally locked yourself out of a path by an incorrect early selection If you only need to program the flow meter once you can write on this sheet If you are doing temporary surveys or expect the program to change make copies of these sheets and write on the copies Select Option Program Setup First choose Setup and work through the following menus Reading Minimum Depth Zero Level Offset Zero Flow on Error D O pH Reading Interval YSI 600 Reading Interval Level Reading Interval Continuous 15 Sec 30 Sec 1 Min 2 Min 5 Min Velocity Reading Interval Continuous 2 Min 5 Min 15 Min 30 Min Minimum Depth for Velocity Measurement 2 IN 50MM 3 IN 75MM 4 IN 100MM B 1 4250 Flow Meter Appendix B Programming Worksheets B 2 8 Zero Level Offset Feet or Meters 9 Zero Flow on Error Yes No 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 D O ph Reading Interval Continuous 15 Sec 30 Sec 1Min 2 Min 5 Min YSI 600 Reading Interval Continuous 15 Sec 30 Sec 1 Min 2 Min 5 Min For reference only after installation copy the
188. ncbcuknesaateetion Lived a a a a e ai 60 3284 001 674 Metric Rain Gauge 0 1 MM ecccesseccssssscecesssseeeccessseeeesesseeeeeceseseeeeeceseseeaaeceseeeaaeeess 60 3280 001 Area Velocity Quick Disconnect BOX cccccccccccecceeeseeessenseceececececceeeessessaauecaecesecsecsessesersaaaaas 60 3254 004 Type E Inter ienne uane EEA TAE AEE A E A E EN iE 60 1784 024 Flowlink Software vnin iii oana ieda a aie ie e a aeae aaia a aa aain 68 2540 200 Call factory for additional information pH Probe and Model 201 pH Module 25 ft cable standard cccccccccessecceeeeneeeeeeeeeeeees 68 4200 002 Includes probe built in temperature sensor A 6 4250 Flow Meter Appendix A Replacement Parts and Accessories PH Probe Only ecni iii Ee AOE EEEE TEN AEN EAEE AEE aad rasan 60 9004 126 DO Probe omlyurnon wei a E EN S 472 0000 00 D O Membrane Kit edi fcc rentenieren cuvted eihcuctelesdaavecdedvdedunte cocssdedisededun detects 479 0020 02 Includes 30 0 002 membranes electrolyte sanding tool and disks O Ring Kit for D O Probe nrnna ee E Rea E Eae EEE EAEE ETE TE EERIE N t 479 0020 00 Temperature Prope onl yenes n ra a NE A E EE E A 60 3214 130 YSI 600 Sonde with pH D O conductivity temperature sensors and 25 cable 68 0600 110 Note Item 68 0600 110 includes a YSI to Isco 4200 6700 adapter cable calibration transport cup 1 stainless steel nose weight and YSI instruction manual Many other configu
189. nd Oper ation Guide for detailed hardware information The following sections describe sensor installation using the two options available for mounting the Sensor in pipes or round bot tomed flow streams For pipes up to 15 38 1 cm in diameter stainless steel self expanding mounting rings Spring Rings are available For pipes larger than 15 in diameter Teledyne Isco offers the Scissor Rings Universal Mounting Rings Area velocity sensors can also be installed using primary measuring devices To install a spring ring you compress the ring slip it inside the pipe and then allow it to spring out to contact the inside diameter of the pipe The inherent outward spring force of the ring firmly secures it in place A typical self expanding mounting ring with a probe mounted on it is shown in Figure 3 9 These mounting rings are available for use in pipes with inside diameters of 6 15 2 cm 8 20 3 cm 10 25 4 cm 12 30 5 cm and 15 38 1 cm The Teledyne Isco part numbers for the various size mounting rings available are listed in Appendix B These part numbers include not only the ring but also the mis cellaneous hardware necessary to mount the sensor on the ring N CAUTION Always wear leather gloves when handling the rings either type The metal is finished but there is still a possibility of cut ting your hands on the edges 4250 Flow Meter Section 3 Installation Compress ring into gap to install in pi
190. ng descriptive material and is available from Teledyne Isco If your installation uses a nonstandard primary device you should consult the manufacturer of the device for flow rates at given levels The flow meter will then calculate a flow conversion for such a device on the basis of the manufacturers data you enter as data points or an equation In some instances a non standard primary device could be supplied with a flow equation you can enter that equation into the flow meter and the flow meter will calculate the flow rate from that equation Area velocity flow conversion is the customary flow con version used with the 4250 The area velocity sensor measures both the level of the flow stream and the velocity at which the liquid is moving It uses ultrasonic reflection to measure the velocity and a pressure transducer to measure the level you provide the third dimension of the flow cross section by entering the width or diameter of the pipe or channel The 4250 uses this combination of measured level velocity and the dimension of the channel to calculate flow This method is unique because it is the only flow conversion that can measure all of these different types of flow submerged full pipe surcharged and reverse Standard non area velocity Flow Conversion The 4250 normally calculates flow based on the velocity of the flow stream the cross sectional shape of the channel and the measured level However you can also configu
191. not connect an Isco pH probe and temperature probe to the 201 module at the same time The Temperature Probe input on the 201 module is for use ONLY with non Isco pH probes that do not have built in temperature sensing The Isco pH probe contains its own integral temperature sensor which if connected in parallel with a separate temperature probe will cause erroneous readings Figure 4 8 pH Parameter Module M Note When installing the pH probe and its sensor carrier make sure the mounting slots on the carrier are completely pressed into the mating tabs on the ring The probe relies on a full engage ment between tabs and slots for secure mounting If the slots are loose against the tabs the probe may be swept away by the force of the stream Always mount the probe in an easily accessible location because you will need to clean it from time to time Also all pH probes are consumable items meaning that they will eventually fail and have to be replaced The probe is due for replacement when you 4 19 4250 Flow Meter Section 4 Options and Accessories can no longer calibrate it after cleaning to 0 2 pH with the standard buffers of 4 7 and or 10 Another indication of end of life is when the probe calibrates satisfactorily but takes too long to stabilize more than 10 minutes Such a probe could not possibly respond to rapidly changing pH If your situation requires fast response you should consider replacement when st
192. nsor that is required to obtain a velocity reading This depth varies with the velocity of the flow stream at higher velocities the depth is greater 2 13 4250 Flow Meter Section 2 Programming When the level of the flow stream falls below the Minimum Depth the flow meter approximates the velocity readings using velocity readings taken earlier when depths were greater than the minimum Under these conditions the flow meter will not be able to detect the direction of the flow in the channel Determine the correct selection for the Minimum Depth by testing the flow meter for a period of time with the default selection 3 inches In most installations this will be the optimum selection If after examining the velocity data you see a sharp decrease in velocity as the level readings approach 3 inches increase the minimum depth to 4 inches You can use the 2 inch option when the channel produces flows of very low velocity Low Profile A V Sensors These sensors do not have a program selection for minimum depths Low profile sensors attempt to measure velocity regardless of depth Typically a low profile sensor provides error free velocity readings to depths as low as 1 inch 25 mm M Note The MINIMUM DEPTH setting will only appear if you are using a standard 10 ft or 30 ft AV probe This setting will not appear if you are using a low profile AV probe The standard probe cannot sense velocities below two inches of dep
193. nstalled in the flow meter for any of these menus to appear 1 Alarm Dialout Disable Conditional Storm Flowlink 2 Level Greater Than _ __ Feet 3 Rainfall Amount _ __ Inches other units 4 Rainfall Time Period 15 Min 30 Min 1 Hr 2 Hr 4 Hr 6 Hr 8 Hr 12 Hr 24 Hr 48 Hr 72 Hr 5 Time Since Last Rainfall Days allowable 1 7 6 Condition Level Flow Rate D O pH Temperature Rain fall YSI pH YSI DO YSI Conductivity YSI Temperature 7 Condition Greater Than Less Than Rate Of Change 8 Select Operator Done Or And 10 11 12 13 14 15 16 Alarm Dial out Numbers Done Num 1 Num 2 Num 3 Num 4 Num 5 First Phone Number Second Phone Number Third Phone Number Fourth Phone Number Fifth Phone Number Delay Between Dialouts Minutes Callback To Disable Alarm Yes No 1 Enter Printer Speed Off le hy 1 hr 2 hr 4 hr Input For Printer Line A None Level Velocity Flow Rate pH D O Temp YSI pH YSI D O YSI Cond YSI Temp Printer Line A Bottom Scale __ units 4 Printer Line A Full Scale _ units Input For Printer Line B None Level Velocity Flow Rate pH D O Temp YSI pH YSI D O YSI Cond YSI Temp Input For Printer Line C None Level Velocity Flow Rate pH D O Temp YSI pH YSI D O YSI Cond YSI Temp Plot Rainfall On Chart No Yes Report Generator A On Off Print Report A Duration To Be In Ho
194. nt s at least one homogeneous piece is higher than the ST standard limitation Manufacturer may give technical reasons to the X marks IDR EFA BA A TE The Environmentally Friendly Use Period EFUP was determined through experience EP AREAS WH URSA ES F207 KR 2007 F BAN TFRRRAB AAA BAZA The date of Manufacture is in code within the serial number The first three numbers are the year of manufacture 207 is year 2007 followed by a letter for the month A is January B is February and so on Table Hazmat Sensors 60 2003 552 Rev NOTICE Disregard the following Declaration of Conformity and Radio Interference Statement if your instrument does not have a CE label on its rear panel Radio Interference Statement FCC This equipment has been tested and found to comply with the limits for a class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equip ment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which the user will be required to correct the interference at his own expense Canada This ISM apparatus meets all r
195. nt parts This will certainly cause malfunction Do not force any part of the mechanism with tools or probes If you disassemble the flow meter do not lift the chassis from the case by holding on to any part of the printer The internal printer contains no user serviceable parts other than the paper and the ribbon If the printer needs service Teledyne Isco recommends you return the flow meter to the factory The remainder of this section provides servicing information and a general troubleshooting guide This information will help you decide whether to attempt to repair the flow meter yourself or return it to the factory Included are sections on removing the flow meter chassis and fuse replacement There are also general comments on servicing electronic equipment with special consideration of CMOS cir cuitry You can remove the flow meter chassis from the cabinet for inspection and servicing Unscrew the four screws two at the top and two at the bottom that hold the flow meter chassis in the cabinet You can then lift the chassis out by inserting the thumb or index finger from each hand into the upper right and lower left corners of the opening for the internal printer Do not try to lift the flow meter out of its case by holding on to any part of the printer mechanism This could bend or distort part of the printer possibly damaging it Once the chassis has cleared the case you can hold onto the edges with both hands and lift it f
196. o remove manhole covers back injuries or injuries to hands or feet may result 2 Planning Advance planning should include arrangements for test equipment tools ventilating equipment protective clothing traffic warning devices ladders safety harness and adequate number of personnel Hasty actions may result in serious injuries Time spent in the manhole should be kept to a minimum 3 Adverse Atmosphere Refer to Table C 1 Hazardous Gases at the end of this appendix Before workers enter a manhole tests should be made for explosive atmosphere presence of hydrogen sulfide and oxygen deficiency Combustible or toxic vapors may be heavier than air so the tests on the atmo sphere must be run at least 3 4 of the way down the manhole Whenever adverse atmosphere is encountered forced venti lation must be used to create safe conditions After the venti lating equipment has been operated for a few minutes the atmosphere in the manhole should be retested before anyone enters the manhole When explosive conditions are encountered the ventilating blower should be placed upwind to prevent igniting any gas that is emerging from the opening When a gasoline engine blower is used it must be located so that exhaust fumes cannot enter the manhole If testing equipment is not available the manhole should be assumed to contain an unsafe atmosphere and forced ventilation must be provided It should never be assumed that
197. o the attention of the service department Small non fragile items can be sent by insured parcel post PLEASE BE SURE TO ENCLOSE A NOTE EXPLAINING THE PROBLEM Shipping Address Teledyne Isco Attention Repair Service 4700 Superior Street Lincoln NE 68504 USA Mailing Address Teledyne Isco PO Box 82531 Lincoln NE 68501 USA 800 775 2965 lab instruments 866 298 6174 samplers amp flow meters Sales amp General Information 800 228 4373 USA amp Canada Phone Repair service Fax 402 465 3001 Email October 11 2013 P N 60 1002 040 Rev H IscoService teledyne com 4 TELEDYNE ISCO Everywhereyoulook
198. o the surface of the membrane The electrical charge on the ions creates a potential difference across the barrier between the solution and the membrane This potential or voltage difference is proportional to the activity of the ions in the solution The potential when read by a sensitive voltmeter translates into a reading of pH With an Isco flow meter the voltage is sent first to a preamplifier inside the probe to reduce the impedance of the circuit and improve the signal to noise ratio and then on to the 4 10 1 pH Probe Calibration 4250 Flow Meter Section 4 Options and Accessories parameter module to allow greater operating distance from the flow meter The flow meter determines the pH value and displays it The 4250 provides a two or three point calibration for the pH probes with commercially prepared calibrated buffer solutions Calibrations of 4 and 7 7 and 10 and 4 7 and 10 are all possible For accurate readings you must clean and re calibrate the probe on a regular basis How often you need to do this depends on the condition of your flow stream Flow streams with a high grease content will coat the sensing surfaces of the probe quickly clogging them and slowing the response time or stopping it altogether Installation in very greasy flow streams is not recom mended M Note For pH probe calibration Teledyne Isco recommends that you use a glass container for the buffer solutions to ensure that the following cond
199. ollowing display will appear PARAMETER TO ADJUST e NONE LEVEL pH DO YSI 600 If you are using the YSI Sonde and YSI 600 does not appear on your display return to step 1 Program and make sure you have selected YES from the YSI CONNECTED menu If you select YSI 600 the following will appear YSI 600 PARAMETER TO CALIBRATE e NONE pH e DO e CONDUCTIVITY If you select pH for the parameter to calibrate the following display will appear YSI 600 pH CALIBRATION pH4 amp 7 pH7 amp 10 pH 4 7 amp 10 You can perform a two or three point calibration for pH with the YSI sonde The menus that follow are similar to those in the pre ceding section for the Isco pH sensor Select the calibration that best suits your stream s profile When you complete the pH cali bration successfully the following display will appear CALIBRATING PRESS ENTER TO CONTINUE Returning to the YSI menu if you select D O YSI 600 DISSOLVED OXYGEN CALIBRATION D O STANDARD eABS BAROMETRIC PRESSURE gt ALTITUDE is just off screen to the right Programming for YSI 600 D O is essentially the same as that described for the Isco D O sensor on the preceding section with the exception that you always place the sensor in a cup rather than wrap a moist cloth around it as is done for the Isco D O sensor 4250 Flow Meter Section 2 Programming
200. on Variable at dif Oxygen Oxygen defi less tasteless tains 20 8 of ferent levels depletion ciency indica Supports com O3 Man can tol from poor tor bustion erate down to ventila 12 Minimum tion and safe 8 hour absorp exposure 14 to tion or 16 Below 10 chemical dangerous to consump life Below 5 to tion of 7 probably oxygen fatal Ozone O3 Irritant and poi 1 66 Max naturally 0 08 0 04 Near bottom Where Detectable sonous Strong occurring level ozone is odor electrical odor is 0 04 ppm used for at 0 015 ppm Strong oxidizer 0 05 ppm disinfec Colorless At 1 causes irrita tion ppm strong sul tion of eyes and fur like odor nose 1 to 10 ppm causes headache nau sea can cause coma Symp toms similar to radiation dam age Sludge Mostly a simple Variable Will not support No data Would 53 19 3 Near top of From See compo Gas asphyxiant May life vary widely with composition structure digestion nents be practically of sludge odorless taste less C 8 Table C 1 Hazardous Gases Continued Explosive 4250 Flow Meter Appendix C General Safety Procedures Likely mable concentrations less toxic than benzene SpecIic Max Max Safe Simplest and i A Chemical Common aya Physiological Safe 60 8 Hour EA by pean Piet Cheapest Formula Properties p E
201. on for mounting probes upstream in small PipeS ccccccccessssseceeeeseeeees 68 3200 012 Probe Carrier for Low Profile Area Velocity Semsor cccccscsesssssseceeeeseceeceesensensssaeeeseeeeees 60 3204 029 Spring Rings Probe Mounting Ring for 6 pipe ccccccsssssscessssececceeseseeeceecseesecesseeeeaecescsneaeeseseeeaaeceseeenaaess 68 3200 007 Probe Mounting Ring for 8 pipe c cccccsssscccessssececcesseeeeeceesseseeccssseeeeeceseseeaeeesseseaeesesseenaaees 68 3200 008 Probe Mounting Ring for 10 pipe ccccssscccesssseecesesseceeceseseeeeceeeseeeeeceseeeeeecesseeeaaecesesenaaees 68 3200 009 Probe Mounting Ring for 12 pipe ccccsscccsssssececeseseeeeeceseseeeeceesseeeeecescseeeeseseseeaaeseseeeaaaees 68 3200 010 Probe Mounting Ring for 15 pipe cccccccscccesssscecesesseeeeceseseeeeccseseeeeeceseseeaecesseeeaeeeeseeeaaaees 68 3200 011 Universal Mounting Ring Scissors Ring for Pipes 16 diameter and larger Base Section with tabs for mounting up to five ProbeS cccceesseccecesenseceeceenaeeeeceenaaees 60 3004 171 Scissors Assembl ye sfc eisciaws eiaste eee ecdsnies Wome eda ed ea A a 60 3004 170 Extension 1 9 08 ne iarere ear a EENE a Ee A a A a A E EE E ASN S 60 3004 172 Ezt ension 2 215 rion es a eiee estan a aE a bund AEE a A a a aeea 60 3004 173 Extension g 8 Lo iare n E SE EE EE E ance REA SN 60 3004 174 Extension AATE r E E E A E E AE E E EE E RE 60 3004 175 S
202. ood reasons to do so Streams that have large amounts of silt would be suitable for this You can still calibrate the level accurately by using the offset distance to set the zero level in the program see Page 2 14 M Note For installations where the sensor is mounted off center you must always have enough flow above the sensor to meet the minimum measurement depth The AV sensor cannot mea sure either level or velocity if the flow stream falls below the sensor 3 6 1 Level Measurementin When measuring level to calibrate an area velocity installation Open Channels No keep in mind the following Primary Device e Make the measurement as accurately as possible e Measure the level at a point inside the ultrasonic cone extending upstream from the AV sensor e Measure level in an area of stable flow This may affect sensor location A V Sensor Ultrasonic Cone Top view of channel Ultrasonic Cone A V Sensor Side view of channel The sensor may be installed at a point offset from the bottom center line of the channel in cases where silting is a problem However typical installations are at the bottom center Note how offset mounting of the sensor will change the dispersal of the ultrasonic cone 3 13 4250 Flow Meter Section 3 Installation 3 14 A V Sensor Ultrasonic Cone Channel center line Effect of offset mounting of sensor Top view of channel In suc
203. or other units of measure Then RAINFALL AMOUNT X XX INCHES or other units of measure Then RAINFALL TIME PERIOD 15MIN 30 MINee1 HRe 2HRe 4HRe 4250 Flow Meter Section 2 Programming If you press the right arrow key several times the following times will appear RAINFALL TIME PERIOD 6HR e 8HRee 12HRe 24HR 48HRe 72 HRe The intervals above are the periods of time over which the rainfall occurs The amount of rain entered in the previous step and detected by the rain gauge must fall during the time interval chosen from this menu before the flow meter recognizes the event as a storm The next menu defines the interval that must pass between storm events TIME SINCE LAST RAINFALL DAYS X allowable entry of 1 7 If you select CONDITION from SAMPLER ENABLE the fol lowing will appear CONDITION e LEVEL FLOW RATE VELOCITY D O pH e TEMPERATURE RAINFALL YSI pH YSI DO YSI CONDUCTIVITY and YSI TEMP may also appear The above conditions are all shown in parentheses because they may not be available to you by the time you reach this menu The menus that do appear will depend on programming selections made earlier in the program At least one of the conditions will be available to you Operation of the conditions is the same as for step 5 Sampler Pacing If you select LEVEL from CONDITION the following will appear LEVEL e GREATER THAN
204. ory In Report Yes No Setup Options Status Report Setup LCD Backlight LCD Backlight Mode Time out Continuous Off Language English French German Spanish Program Lock On Off Select Option Program Setup This time select Program and do the following Program Section Units Of Level Measure Ft In M mm Not Measured Flow Rate Units of Measure GPS GPM GPH MGD CFS CFM CFH CFD LPS M3S M3M M3H M3D AFD Totalized Volume Units GAL MGAL CF L M3 AF Rain Gauge Inches MM Not Measured pH Units Of Measure pH Not Measured D O Units MG L PPM Not Measured Temperature Units Deg F Deg C Not Measured YSI pH Units Of Measure pH Not Measured YSI D O Units MG L PPM Not Measured YSI Conductivity Parameter Specific Conductivity Salin ity Conductivity T D S Units Coeff YSI Temperature Deg F Deg C Not Measured 1 Flow Calculation Area Velocity N Area Velocity Calculation Velocity Data Points 3 Area Velocity Channel Shape Round Pipe U Channel OAA 11 12 13 14 Rectangular Trapezoidal Velocity Round Pipe Diameter Ft or meters Velocity U Channel Width Ft or meters Velocity Rectangular Width Ft or meters Velocity Trapezoidal Top Width Ft or meters Velocity Trapezoidal Bottom Width __ Ft or meters Area Velocity Calculation Velocity Data Points 10 Data Point Set One Two Three Four None
205. ot install it where there is any possibility of submersion Where temperatures are expected to fall below freezing Teledyne Isco recommends installation of the alarm box indoors or in a heated location as the manufacturer of the micro processor does not specify its operation below 32 F 0 C DANGER Hazard of electric shock Use the relay contacts for low voltage 24 V pilot duty only Do not wire 120 VAC or higher voltages to the relay contacts Connecting the High Low Alarm Relay Box to a 4200 Series Flow Meter requires a cable and an M S connector A special cable 25 feet long is available from Teledyne Isco On one end of the cable is a 4 pin male M S connector Plug this connector into the Remote Printer Rain Gauge connector on the flow meter The other end of the cable has 3 stripped wires Attach them to the alarm box according to the instructions in the alarm box instruction manual BLACK 12 VDC GREEN 12 VDC WHITE DATA Isco 4200 Series Flow Meters have the capability of displaying recording and if Flowlink software is used storing data pro vided from parameter sensors The parameter sensors available for the Isco flow meters are for temperature dissolved oxygen DO pH concerned with the acidity or alkalinity of a solution and the YSI 600 Multi Parameter Sonde See Section 2 for information on the YSI 600 Sonde This section covers the Isco pH D O and temperature sensors The parameter probes as we
206. otice Contact Information Customer Service Phone 800 228 4373 USA Canada Mexico 402 464 0231 Outside North America Fax 402 465 3022 Email IscoCSR teledyne com Technical Support Phone Toll Free 866 298 6174 Samplers and Flow Meters Toll Free 800 775 2965 Syringe Pumps and Liquid Chromatography Email IscoService teledyne com Return equipment to 4700 Superior Street Lincoln NE 68504 1398 Other Correspondence Mail to P O Box 82531 Lincoln NE 68501 2531 Email IscoInfo teledyne com Revised September 2012 General Warnings Hazard Severity Levels 4250 Flow Meter Safety Before installing operating or maintaining this equipment it is imperative that all hazards and preventive measures are fully understood For information about general safety practices turn to Appendix C General Safety Procedures While specific hazards may vary according to location and application take heed of the following general warnings WARNING Avoid hazardous practices If you use this instrument in any way not specified in this manual the protection provided by the instrument may be impaired AVERTISSEMENT Eviter les usages p rilleux Si vous utilisez cet instrument d une mani re autre que celles qui sont specifi es dans ce manuel la protection fournie de l instrument peut tre affaiblie cela augmentera votre risque de blessure This manual applies Hazard Severity Levels to the safety alerts
207. ould recheck the level flow measurement If you press Enter again the flow meter will display the system voltage SUPPLY VOLTAGE XX_X This value should be from 10 5 to 13 5 volts DC Note that if you do not press Enter after the first diagnostic menu appears the flow meter will automatically advance the display through the next two screens and finally revert to the Setup menu after a short time out YSI SOFTWARE REV XX_X Return to the Setup menu if the unit has not already done so This time select ENABLE ALARM HYSTERESIS from the menu Press Enter The following will appear LEVEL ENABLE ALARM HYSTERESIS X XXX FT or other units of measure The HYSTERESIS menu lets you set the range over which the level or other condition can vary before the flow meter responds to the change In the PROGRAM section of the software there are several steps that require a change in a condition to make the flow meter carry out certain actions For example step 6 programs the flow meter to enable activate a sampler In that step you select a 2 17 4250 Flow Meter Section 2 Programming 2 18 condition or set of conditions that must occur before the sampler is enabled You enter a value level is an example that must be met before the enabling occurs But what if this value is met and then falls away It is possible for a condition to vary rapidly over a narrow range Without hys teresis the
208. out of a manhole by his arm unless it is a dire emer gency When more than one person must enter a manhole the first person should reach the bottom and step off the ladder before the next one starts down When two men climb at the same time the upper one can cause the lower one to fall by slipping or stepping on his fingers 5 Traffic Protection In addition to traffic cones markers warning signs and barricades a vehicle or a heavy piece of equipment should be placed between the working area and oncoming traffic Flashing warning signals should be used to alert drivers and pedestrians Orange safety vests should be worn by personnel stationed at the surface when the manhole is located in a vehicular traffic area 6 Falling Object All loose items should be kept away from the manhole opening This applies to hand tools as well as stones gravel and other objects 7 Removing the Covers Manhole covers should be removed with a properly designed hook Use of a pick ax screwdriver or small pry bar may result in injury A suitable tool can be made from 4 inch round or hex stock Two inches of one end should be bent at a right angle and the other end should be formed into a D handle wide enough to accommodate both hands Even with this tool care must be exercised to prevent the cover from being dropped on the toes The 2 inch projection should be inserted into one of the holes in the cover the handle grasped with both han
209. ow meter s modem detects the ring it will answer and automatically reset the alarm If there is no one available to answer an alarm you can have the flow meter dial a paging service and then someone with a pager can call back to acknowledge the alarm To acknowledge an alarm from a touch tone phone wait for the spoken message to complete then press X X X The X X X is the three digits of the site ID number This step sets up the operation of the flow meter s internal printer This printer also functions as a plotter The printer plotter is capable of printing alphanumeric information words and numbers and at the same time plotting linear data like flow level pH etc The unit can print as many as three dif ferent data lines at the same time it regularly records other printed information routinely supplied from the flow meter 2 57 4250 Flow Meter Section 2 Programming 2 58 Program selections made in this step will determine the appearance of the printer printer s chart The first menu will request the speed of the chart ENTER PRINTER SPEED e OFF 1 2 HR 1 HR e 2 HR 4 HR If you select OFF the printer will be disabled No data will be printed The flow meter will however still print reports if you activate that in step 9 The choice made from the other speeds depends on the amount of data you need to record If you are recording from a stable situation and are using only one data line an
210. pe then outward force of ring against pipe wall holds ring in place inside pipe Figure 3 9 Sensor Installed on a Spring Ring Completing the assembly CAUTION Make sure the slots on the sensor are completely pressed onto the tabs on the ring This is particularly important where there is any possibility of reverse flows or where flows are of high velocity If the sensor is not fully pressed onto the mounting ring tabs it might come loose in the stream and could possibly be damaged or lost To complete the sensor spring ring assembly procedure attach the sensor cable to the downstream edge of the ring Follow the cable routing shown in Figure 3 9 Other routing directions may affect measurement accuracy The cable can actually create a stilling well downstream from the sensor causing the level to read low Use the self locking plastic ties supplied with the ring Install the ring in the pipe by compressing it Press inward on both sides and slide the ring into the pipe Route the sensor cable out of the stream and secure it in position by placing the ties through the holes in the mounting ring and then locking them around the cable as shown To prevent debris from catching on the cable it is important to attach the cable to the mounting ring so it offers as little resistance to the flow as possible 3 17 4250 Flow Meter Section 3 Installation 3 18 3 8 2 Scissors Rings CAUTION Make sure the sensor c
211. pear PH OR DO IN REPORT e YES e NO Select YES if you want DO PH to appear in the report Note that you must have the appropriate sensor connected to the flow meter to sense parameters the flow meter is capable of sensing temperature pH and temperature and D O dissolved oxygen and temperature Press Enter The following will appear TEMPERATURE IN REPORT e YES e NO 2 25 4250 Flow Meter Section 2 Programming 2 26 Select YES if you want TEMPERATURE to appear in the report Press Enter again and the display will return to the REPORT SETUP menu REPORT SETUP e FLOW e e DO PH e e YSI 600 e SAMPLE HISTORY e FLOW METER HISTORY is just off the screen Now select YSI 600 The following display will appear YSI DATA IN REPORT e YES NOe Press Enter again and the display will return to the REPORT SETUP menu REPORT SETUP e FLOW e DO PH e e YSI 600 e SAMPLE HISTORY e This time select SAMPLE HISTORY Press Enter The following display will appear SAMPLE HISTORY IN REPORT e YES e NO Select YES if you want SAMPLE HISTORY to appear in the report Press Enter again and the display will return to the REPORT SETUP menu REPORT SETUP e DO PH e SAMPLE HISTORY YSI 600 e FLOW METER This time select FLOW METER HISTORY Press Enter The fol lowing will appear FLOW METER HISTORY IN REPORT e YES NO Select YES if you want F
212. ple conditions from its sensors If you choose CONDITIONAL for sampler pacing and it doesn t seem to work properly for you read the section on hysteresis Then check the hysteresis setpoints for your conditions The defaults are all zero You must have the appropriate sensors attached to the flow meter to measure temperature D O pH conductivity etc the flow meter cannot do this by itself nor does it occur automati cally Sampler Enable means that in a combination flow meter sampler pair the flow meter controls the sampler s ability to run its own program The difference between step 5 sampler pacing and step 6 sampler enable is that in sampler pacing the flow meter merely sends flow pulses to the sampler from time to time The sampler counts these flow pulses to determine when to take a sample according to its own programming With sampler pacing the sampler is always enabled With sampler enabling the flow meter can actually stop operation of the sampler The sampler is still set up to run its own program but the inhibit enable line from the flow meter will determine when and whether the sampler runs its program This feature is useful for storm water runoff monitoring applications where it may be necessary for the flow meter sampler pair to have to wait a long time between storm intervals 2 9 4250 Flow Meter Section 2 Programming 2 10 2 3 7 Step 7 Alarm Dialout Mode 2 3 8 Step 8 Printer Again
213. pressure transducer 5 2 1 When to Recharge the Both the 4250 and the optional Quick Disconnect Box dry the Desiccant inthe Tubes probe s vent tube with a desiccant tube Inspect the desiccant tube frequently Exposed to humid air constantly the desiccant will become saturated quickly If the desiccant is unable to dry the vent tube and the tube becomes blocked with moisture the level readings will be unreliable and the probe can suffer per manent internal damage Teledyne Isco uses silica gel SiO9 in the desiccant tubes and canisters e One looks like small beads or pellets that are blue black when dry pale pink to transparent when saturated e The other looks like coarse sand yellow when dry dark green when saturated Regenerate silica gel before all the desiccant in the tube turns pink or green by heating Another type of desiccant may be used in the tubes anhydrous calcium sulfate CaSO Calcium sulfate looks like rough chips of tinted plaster and changes from blue when dry to rose red when saturated Regenerate the calcium sulfate desiccant before all the desiccant in the tube turns rose red Do not put calcium sulfate in the metal desiccant cartridge The filters in the ends of the desiccant tube prevent desiccant particles from entering the vent line When they become soiled replace them with cotton balls The desiccant in the tube requires periodic recharging to dry it after it becomes saturated with moisture Aft
214. r 0 1 Head exhausts ache in few Fires of hours at 0 02 almost any kind Carbon CCly Heavy ethereal 5 3 Intestinal 1 000 100 At bottom Industrial Detectable Tetra Chl odor upset loss of to wastes odor oride consciousness 1 500 solvent at low concen possible renal cleaning trations damage respi ratory failure Chlorine Clo Irritant Yel 2 49 Irritates respi 4 1 At bottom Chlorine Detectable low green color ratory tract cylinder odor at low Choking odor Kills most ani and feed concentra detectable in very mals in a very line leaks tions low concentra short time at tions Non flam 0 1 mable Formal CH20 Colorless pun 1 07 Irritating to the 10 7 0 73 0 Near bottom Incom Detectable dehyde gent suffocating nose plete com odor odor bustion of organics Common air pollut ant fungi cide Gasoline C5H12 Volatile solvent 3 0 Anesthetic 4 000 1 000 13 6 0 At bottom Service 1 Combusti to Colorless Odor to effects when to stations ble gas indi CgH9 noticeable at 4 0 inhaled Rap 7 000 garages cator 0 03 Flamma idly fatal at storage ble 2 4 Danger tanks 2 Oxygen ous for short houses deficiency exposure at 1 1 indicator to 2 2 Hydrogen H2 Simple asphyxi 0 07 Acts mechani 4 0 74 0 At top Manufac Combustible ant Colorless cally to deprive tured gas gas indicator odorless taste tissues of oxy sludge less Flammable gen Does not digestion s
215. r Appendix D Material Safety Data Sheets D 4 Multisorb Technologies Inc Silica gel Indicating February 14 2009 Page 3 of 5 Component Name OSHA ACGIH Other Recommended PEL TLV Limits Silica gel TWA 20 mppef Not Applicable NIOSH REL 80 mg m SiO TWA 6 mg m IDLH 3000 mg m Cobalt chloride TWA 1 mg m TWA 02 mg m as NIOSH REL cobalt metal fume amp dust cobalt TWA 05 mg m Cobalt metal dust and fume as cobalt IDLH 20 mg m as metal dust amp fume as Co Section 9 Physical and Chemical Properties Appearance Pink to blue granules Vapor Density Not applicable Odor None Boiling Point 4046 F 2230 C Physical State Solid granule Melting Point 3110 F 1710 C PH Not applicable Solubility Insoluble in water Vapor Pressure Not applicable Specific Gravity 2 1 Evaporation Rate Not applicable Odor Threshold Not applicable Coefficient of water Not applicable Auto ignition Not applicable oil distribution Point Flammable Not applicable Flammable Not applicable Limits Flash Point Not applicable Section 10 Stability and Reactivity Stability Stable Conditions to avoid Incompatibility Hazardous Decomposition Products Hazardous Polymerization Moisture and high humidity environments None Will not occur Water fluorine oxygen difluoride chlorine trifluoride Section 11 Toxicological Information This
216. r connected to the flow meter by modem You can use other programs in the package to process the retrieved data for further analysis In addition to storing data this software makes it possible to divide part of the flow meter s memory into partitions These partitions may be for matted in rollover or slate mode of data storage You can also set up the flow meter to store data as a result of some sort of triggering event such as level rising to a predetermined point the passage of a predetermined time interval or the occurrence of a storm event such as rainfall Consult the Factory A detailed explanation of the Flowlink software is beyond the scope of this manual Information on Flowlink Software is available from its manual or from the factory 4 7 High Low Alarm Relay Teledyne Isco offers a control box that monitors flow rate data Box available from any 4200 Series Flow Meter Alarm relays trip when the flow rate exceeds or falls below pre selected limits High and low set points are user set and range from 0 to 99 in 1 increments Output from the unit is the switching of form C SPDT relay contacts The unit has 2 relays one for high alarm and the other for low The availability of form C contacts both NO normally open and NC normally closed contacts means you can switch loads either on or off Relay contacts are rated 3 Amperes at 24 volts AC or DC The alarm box operates on 12 VDC supplied from the flow m
217. r the memory previous programming changes will be erased but the flow meter will again begin keeping track of changes the next time you change the program D O ADJUSTED pH ADJUSTED LEVEL ADJUSTED FLOW CONVERSION CHANGED PLOTTER SPEED CHANGED PLOTTER TURNED ON PLOTTER TURNED OFF TIME CHANGE FROM TIME CHANGE TO REPORT A CHANGED REPORT B CHANGED REPORT A TURNED ON REPORT B TURNED ON REPORT A TURNED OFF REPORT B TURNED OFF TOTALIZER RESET INTERROGATED SAMPLER ENABLED SAMPLER DISABLED ALARM ACKED BY X ALARM NOT ACKNOWLEDGED YSI pH ADJUSTED YSI D O ADJUSTED YSI CONDUCTIVITY ADJUSTED 2 61 4250 Flow Meter Section 2 Programming 2 62 4250 Flow Meter Section 3 Installation 3 1 Preparation for Use 3 1 1 Installing the Desiccant Canister 3 1 2 Installing the External Desiccant Cartridge This section of the manual contains information on installing the 4250 Flow Meter Included are sections on power sources mounting methods interconnection wiring installation of the AV sensor and setup procedure for the unit The flow meter is shipped with a roll of paper installed and a standard program in the system memory called the default program This program exists to test the flow meter at the factory and also because the computer must always have some thing programmed You will usually program the flow meter dif ferently for your installation You should familiarize yourself with th
218. r when the flow meter is communicating with a remote computer Flowlink applications only The letters E or D will appear Enable or Disable when the sampler enable function step 6 is programmed by condition Programmed by 2 1 4250 Flow Meter Section 2 Programming 2 2 2 1 2 Keypad Functions condition means that the flow meter will enable the sampler only when a certain condition or set of conditions sensed by the flow meter are met Total Flow Current Level Date or pH D O Flow Rate Time temperature Following is a typical programming display on the flow meter One of the items in the second line will be flashing The item flashing is the selection currently held in memory TOTALIZED VOLUME UNITS CFe GALe M3 AFe Le MGAL Following is a typical display providing instructional infor mation CHANGES HAVE BEEN MADE IN STEP PRESS 0 TO CONTINUE PRESS 1 TO DISCARD If you stop programming for more than two minutes the flow meter will time out and whatever is on the display message or program step will revert to the normal display shown previ ously The program consists of steps and substeps The steps are listed on the flow meter front panel Most steps contain several sub steps Generally you need to complete all the substeps before stopping or the flow meter will reject the changes you made for that step after it times out There are some excep
219. rations of the YSI 600 Sonde are available without either the pH and or D O sensors or supplied with 50 100 or 200 cables Also available is a low ionic strength pH sensor for use in streams with very low conduc tivity 10umhos cm or less Call the factory for more information D O Sensor Maintenance Supplies D O Probe membrane and electrolyte kit 30 membranes 30 mL KCI soln 2 O rings 60 0603 205 D O Probe reconditioning kit Instructions and sanding disks cccsccccesseseeeeeeeeenenees 60 0603 206 Miscellaneous for use with the YSI Sonde YSE600 Instruction Manual i lt cecci sisiccchasiecctecscuabicvcekenss dads a a ia a e aai 60 0603 218 YSI 600 to Isco 4200 6700 Adapter Cable ccccccsccccccsssscceceessseeeessesseeeeeseseeeeesesseeeeeeseea 60 0604 001 YSI 600 and Isco 674 Rain Gauge Y Connect Cable ccccccccssssceccessssececeseseeeecesesseeeeenenaas 60 0604 002 This cable allows use of the YSI 600 Sonde and the Isco 674 Rain Gauge at the same time Use the following with Isco Mounting Rings in Round Pipe Installations Probe Carrier for Temperature probe ccccccccesssssceseseneceeeccsesaeceeceeaaaeseccssesaeseceseaaeeeseneeaaees 60 3204 010 Probe Carrier for pH probe with internal temperature SeNSOL ccccccssscesesetteeeeessseeeees 60 3208 001 Probe Carrier for D O probe and separate Temperature probe ccccccsccccessessneceeesseeeees 60 3204 006 Probe Extensi
220. re the 4250 for level to flow con version rather than area velocity The conversion types are Weir Flume Manning Data Points and Equation You use Weir Flume flow conversion when your primary mea suring device is a weir or a flume A weir is a wall or dam across the flow stream Water must rise to the point where it flows over the top of the wall The measured level upstream behind the wall is used to calculate the flow rate Flumes differ from weirs in that there is no wall or barrier but instead a restriction typically a sharp narrowing or change in the slope of the channel that restricts the flow Again the measured level of the stream at some point ahead of the restriction is used by the flow meter to 2 3 3 Step 3 Adjust Level Parameters 4250 Flow Meter Section 2 Programming calculate flow In this flow conversion mode the flow meter uses internal look up tables for many common primary measuring devices An Equation is used when you have a non standard primary device or want to use different values from those programmed into the look up tables of the flow meter Equation uses the standard flow equation Q k1H 4 k2HP Where Q equals flow rate k1 and k2 are constants H is level or head and P1 and P2 are the powers to which the two H terms are raised Your equation may not have the second term in which case you would enter 0 for the second constant k2 Most common primary devices are supported in the flow me
221. reas where such changes in channel shape nearby make the flow turbulent Instead install where the flow has stabilized e You do not have to install the sensor with a primary measuring device The flow in this 10 round pipe is uni form The ideal level measurement point is always within the ultrasonic cone point C but it is not easily accessible In this example level mea surement at point A is acceptable due to the uniform flow Note Not drawn to scale Depths in all three examples are to show flow char acteristics of each channel The flow in this 10 round pipe is not uniform due to the low liquid level and the disturbance caused by the sen sor At point B the level rises as the liquid passes over the sensor and mounting ring Measure level at C If the flow becomes uniform when the sensor and ring are removed take a level measurement close to the sensor location The flow at the a v sensor is not uni form The level drops sharply into the lower outfall Similar effects would be noted in the case of an elbow or bend in the channel In this example the sensor should be moved forward to the uniform flow between points C and D Take the level measurement within the uniform flow It might also be nec essary to average several level mea surements 4250 Flow Meter Section 3 Installation Sensor Cable Note routing Sensor 2 6 Inches 2 Inches 2 Inches 2 Inches
222. recauciones Der gepfeilte Blitz im Dreieck ist ein Warnzeichen das Sei vor gefahrlichen Spannungen im Inneren des Produkts warnt Esta se al le advierte sobre la importancia de las instrucciones del manual que acompa an a este producto gt gt Esta se al alerta sobre la presencia de alto voltaje en el interior del producto 4250 Flow Meter Table of Contents Section 1 Introduction LV Descriptio sad ette anid teil a beatana tho inet Licata a aati chal eset eS 1 2 1 2 Compatible Equipment 0 0 ccc ene n eens 1 2 1 3 Flow Meter Operation 0 0 0 ccc cece enn eee 1 3 1 4 Area Velocity Sensor Operation sesanan cece ee 1 3 1 4 1 Velocity Measurement 0 0c ccc cee eee nes 1 3 1 4 2 Pressure Transducer Operation 0 00 cece cence eens 1 4 1 5 Three Sensors Available 0 0 0 eee nen tenes 1 4 1 6 Software Upgrades chis tenta sa a na e tte tenet nen eee 1 6 1 7 Controls Indicators and Connectors 00 ccc eee eee eens 1 6 1 8 Technical Specifications 0 asuneen enere reee rrer 1 6 1 9 How to Make Battery Calculations 0 0 0 0 cece een eens 1 13 1 9 1 Calculating Current Draw 0 0 sennen ennnen eenen 1 14 Section 2 Programming 251Getting Started n aee aere hei oa se ee eee Gan ie 2 1 2 1 1 Operation of the Display 0 0 ccc eee eens 2 1 2 1 2 Keypad Functions aee Accesses etd Bond oe eee e
223. red level in the flow stream It also lets you calibrate the pH acidity or alkalinity D O dis solved oxygen parameter sensors and the YSI 600 Multiple Parameter Sonde Note that there is no calibration step for the temperature sensor because it does not need calibration When you select step 3 the following will appear PARAMETER TO ADJUST e NONE LEVEL pH D O YSI 600 LEVEL will not show up if you are using the flow meter only for parameter sensing Likewise pH and or D O and YSI 600 will not show up on the display if you have locked them out by pro gramming selections you made in step 1 Remember that selection of either pH or D O in step 1 will keep the other from appearing on the display in this or subsequent programming steps If the parameter you want does not appear in this menu exit the program and return to Setup Check to see that you have not accidentally locked your choice out with selec tions you made in the early section of the program If you select NONE the flow meter will advance to the next step If you select LEVEL the following will appear ENTER CURRENT LEVEL X XXX FEET or meters First measure the level in the flow stream This is usually done with either a measuring stick Generally you should measure the level upstream from the AV sensor The sensor should be installed in an area of stable flow 2 43 4250 Flow Meter Section 2 Programming This pi
224. ree of the case 4250 Flow Meter Section 5 Maintenance and Service M Note If you disassemble the flow meter for servicing you will also remove the aluminum chassis covers to access the circuitry Always replace these covers when repairs have been com pleted The covers protect the circuit boards and also reduce signal emissions that could interfere with the operation of nearby electronic equipment For the same reason do not remove any of the ferrite beads or alter the wiring harnesses inside the cabinet in any way Figure 5 8 Lifting the Flow Meter from the Case 5 12 5 5 2 Fuse Replacement With the flow meter chassis out of the cabinet you can locate and change fuses The fuses are located on the printed circuit board directly behind the keypad There is an aluminum cover over this board Remove the cover by pressing against its surface with the palm of your hand and then pulling downward on it with your fingers A plastic catch under the cover holds it in place The fuses are labeled F1 F2 and F3 The proper size for each of these fuses is F1 5 amp fast blow F2 5 amp fast blow F3 2 1 2 amp fast blow Always replace a blown fuse with one of the same value Using a larger value fuse could cause serious damage to the flow meter or to its power supply Replace the protective cover making sure the two ears on top of the cover slide into the mating slots on the chassis There should be a noticeable snap w
225. returns 5 Do not try to regenerate the desiccant inside the cartridge the cartridge is plastic and will melt 6 Refill the cartridge with the regenerated desiccant or with the extra desiccant provided in the accessory package 7 Replace the end caps Notice the foam filters in the end caps they keep small pieces of the desiccant material from falling out of the cartridge You can clean these filters from time to time using ordinary dish soap and water then allow to dry Regeneration of the desiccators is extremely important Saturated desiccators let the flow meter draw moisture inside exposing both mechanical and electronic components to water and or chemical contamination The air in many installations contains fumes that will form acids in the presence of moisture These acids may corrode electrical components particularly connectors and circuit boards Moisture drawn into the area velocity probe s reference port vent tube will disable the probe Unseen damage caused by moisture will eventually ruin the flow meter For maximum equipment life and reliability inspect the desiccators regularly and regenerate them when neces sary 5 3 Care of the AV Sensor and Cables 5 3 1 Low Maintenance 5 3 2 Cleaning the Standard AV Probe 4250 Flow Meter Section 5 Maintenance and Service The area velocity sensor and its cable require little periodic maintenance unless there is a great deal of debris in your flow stream Cer
226. rity reasons Further changes will require entry of the password which is the model number of the flow meter 4250 If you select ON there is a time out before the lock engages 2 27 4250 Flow Meter Section 2 Programming 2 4 3 Step 1 Program 2 28 If you continue to work through the rest of the program the lock will not engage until you are done But if you stop programming longer than two minutes the lock will engage and you will not be able to make any further program changes Press Enter and the SETUP menu will reappear SELECT OPTION e PROGRAM e e SETUP e PROGRAM will flash PROGRAM is always the default choice That is because you are more likely to need to make changes in the PROGRAM section of the software than in the SETUP section If you choose NOT MEASURED for any selection the flow meter will make no further reference to that function for the rest of the program and you will be unable to activate that function later If there is a feature you need that does not appear when the manual says it should return to step 1 and make sure you have not accidentally left it turned off If you program a parameter value as a condition for sampler enabling pacing dialout etc and then turn that parameter sensor off the flow meter will also remove that condition from the program Consider all aspects of your program before you make any changes Press Enter The following will appear UNITS
227. rs per second M3M cubic meters per minute M3H cubic meters per hour M3D cubic meters per day LPS liters per second CFD cubic feet per day GPH gallons per hour AFD acre feet per day CFH cubic feet per hour 4250 Flow Meter Section 2 Programming DATA POINT flow conversion allows you to enter measured level and flow rate values for a number of different points The 4250 Flow Meter can accept up to four sets of data points with each set containing as many as fifty points The flow meter then performs a three point interpolation to cal culate a flow rate appropriate for the data entered The common use of data point flow conversion is with unusual primary mea suring devices specifically devices that the 4250 does not support in the WEIR FLUME flow conversion set The level to flow rate data for such devices is usually available from the manufacturer From this data the flow meter can create a flow conversion based on the relationship between the level and flow rate After the FLOW RATE UNITS menu has appeared the next menu is SET X 1 4 0 POINTS ENTERED e ADD POINT UNITS Then SET 1 DATA POINT 1 ENTER 0 00 level units 0 000 units of volume After you have entered the data point set the following will appear SET X 1 4 XX 1 50 POINTS ENTERED e USE EDIT POINT ADD POINT CLEAR PRINT UNITS SAVE will also appear if you move the flashing cursor wi
228. s After reaching the furthest option the arrow will move to the left side of the display indicating that there are options unseen to the left These will be the options you started with If you want to go back to one of them use the left arrow key until the option you need reappears When the desired selection is flashing just press Enter The display will then automatically advance to the next step of the program All of the program steps contain substeps that must be com pleted before you advance to the next step Some steps like Reset Totalizer contain only a few substeps Some steps require the entry of a numeric value Program these steps by using the number and decimal keys to enter the value Note that it is possible to program the flow meter in the shop rather than at the job site with the exception of step 3 Adjust Level Parameters To set level you must make an accurate mea surement of the level in the flow stream and then enter that value This can only be done at the job site If you are programming the flow meter for the first time gen erally you will press Enter start with step 1 and go on from there If the flow meter has been in use and you need to change only certain aspects of the program you would more likely use the Go To Program Step key With this key you can go directly to the program step you need to change which saves time If you change an entry and do not like it you can make the display revert
229. s install the cables so they are not at risk of damage result ing from other activity taking place in the area In temporary installations do not leave cables lying around where they may be run over by heavy equipment Do not leave extra cable loose in the flow stream where it can tangle and trap debris In permanent installations cables repeatedly subjected to rough environments will fail and should be installed in conduit for pro tection The conduit will have to be large enough to pass the con nector N CAUTION Avoid putting heavy pressure on the probe cable or making sharp bends in it when installing or servicing the probe Exces sive pressure may collapse the cable crushing the reference vent tube Sharp bends may cause the cable to kink also blocking the vent When securing the cable with plastic cable ties tighten them only enough to secure the cable do not tighten them so much that the cable jacket is visibly deformed 5 7 4250 Flow Meter Section 5 Maintenance and Service 5 4 Maintenance of the The internal printer needs little maintenance beyond changing Printer the chart roll and the ink ribbon Refer to the pictures provided for each section Also refer to the label inside the cabinet END CAP REROLL SPOOL ASSEMBLY SUPPLY SPOOL END CAP ASSEMBLY 1 REMOVE REROLL AND SUPPLY ASSEMBLIES 4 INSERT PAPER END INTO PLOTTER ENTRANCE AND REMOVE WHITE CAPS MARKED BY ARROW ON PLOTTER AND PRESS CHART
230. s Celsius or degrees Fahr enheit If you are not using the temperature probe you would select NOT MEASURED for this step Note that if you are using either the pH or D O probe temper ature must be measured the NOT MEASURED option will not even appear YSI Sonde The following series of menus concerns the use of the YSI 600 Multi Parameter Sonde This probe allows you to measure several different characteristics of a flow stream at the same time The YSI 600 Sonde attaches to the Rain Gauge con nector on the 4250 This connector must be a special modified connector with nine pins 4250 Flow Meters with 4 pin Rain Gauge connectors cannot support the YSI 600 It is necessary to return the flow meter to the factory for modifications if you wish to use a YSI 600 Sonde In addition to the connector there are significant inter nal modifications to the flow meter s electronics and software You can use both the YSI Sonde and a Rain Gauge on flow meters that support the YSI with a special Y connect cable Note that the YSI 600 Sonde differs from the previously mentioned pH and D O probes The YSI 600 can measure pH and D O at the same time as well as temperature and conductivity If you are not using the YSI 600 sonde select NO in the following display and the flow meter will advance to the next step Otherwise select YES YSI 600 CONNECTED e YES e NO e Ifyou select NO you will be unable to activate the YSI Son
231. s the menus shown on the second line of the display key This key lets you enter a plus or minus to a quantity entered Its most common use is in entering values for the equation a method of flow conversion On flow meters equipped with the optional modem only you can use this character as a dash when entering dialout numbers To start programming turn on the flow meter and wait for the display to settle Then either press the Enter Program Step key generally referred to as Enter or the Go To Program Step key The display will change to two lines of text the first line describes the step you are programming and the second line shows the choices available One choice shown will be flashing The flashing indicates that this is the current one held in the memory If you are satisfied with this choice just press Enter and the flow meter will advance to the next step 2 3 4250 Flow Meter Section 2 Programming 2 4 If you want a different choice from the one that is flashing you can move across the display by using the left and right arrow keys Each time you press the right arrow key the flashing selection will move one position to the right This will continue until the flashing cursor is over the last display You may notice an arrow pointing to the edge of the display This indicates additional choices are available beyond what you can see By continuing to press the right arrow key you can view these unseen menu option
232. s they are not connected in this application 4 7 4250 Flow Meter Section 4 Options and Accessories 4 4 Pacing Non Isco For applications requiring the conversion of the flow meter s flow Equipment proportional output signal to a fixed duration contact closure Teledyne Isco offers the Type E Interface Figure 4 1 Type E Interface for pacing non Isco equipment To allow connection to a second device simultaneously you must connect using the special Isco Y cable part 60 5314 278 A con nected sampler must have its own external power NEVER connect the sampler and flow meter to the same power source CAUTION Do not use the standard Isco Y cable 60 3704 081 with the Type E Interface This cable is designed for Isco sampler con nection only Use of this device requires a factory modification to the flow meter If you are connecting the Type E Interface to a previously purchased flow meter prepare the unit by performing the steps described in this section or contact the factory to return the unit for modification by Technical Service DANGER Risk of electrocution Disconnect the flow meter from power before performing any modification or repair 4 8 4250 Flow Meter Section 4 Options and Accessories CAUTION Always protect your equipment by observing anti static precau tions when exposing internal components Turn to Section 5 7 1 for recommended precautions 1 Remove the
233. s to the modified RAIN GAUGE connector on the 4250 Flow meters having only a 4 pin rain gauge connector will not support the YSI Sonde If you wish to upgrade your flow meter to use this system contact the factory Note that you can have both the YSI 600 Sonde and the Rain Gauge connected to the flow meter at the same time by using a special Y connect cable The YSI 600 Sonde can measure the following water qualities dissolved oxygen D O conductivity temperature and pH Conductivity measurements made by the sonde can be used to calculate specific conductivity salinity and total dissolved solids A brief description and specifications for the YSI 600 are printed in Section 4 You may also contact the factory or your Teledyne Isco representative More information on the sonde is found in the YSI 600 Manual shipped with each YSI 600 Sonde Assembled Sonde Conductivity inside pH glass sensor pH reference Cover Removed Temperature D O sensor In this step you decide whether to reset the flow meter s internal flow totalizers If the installation is permanent you generally won t reset the totalizer If you are using the flow meter as a por table recording unit and move it from site to site you would gen erally reset the totalizer between sites 2 3 5 Step 5 Sampler Pacing 2 3 6 Step 6 Sampler Enable 4250 Flow Meter Section 2 Programming It is common to use a f
234. sets as level to flow rate sets and then wanted to define a set as level to area NONE would appear to tell you that no sets were available to define as level to area data points 4250 Flow Meter Section 2 Programming To get out of this situation you would have to exit and then go back to the menu where you defined the data points as level to flow rate data points When you reach that menu you would select CLEAR to erase the set in the flow meter s memory Then you could redefine the data set as a level to area set After you select ONE and press Enter the following display will appear if you have not previously entered any data points to the set LEVEL UNITS FOR DATA POINT ENTRY eFTeeINeeMee MMe Select one Press Enter The next display requests selection of units of measure for flow rate FLOW RATE UNITS GPMe GPS MGD CFS e CFM M3S e M3H M3D If you press the right arrow key several times the following units will appear on the display FLOW RATE UNITS e LPS e CFD GPH AFD e CFH e CFM e M3M Make your selection Then SET 1 0 POINTS ENTERED e ADD POINT UNITS if the set is empty Only ADD POINT and UNITS will appear if you have not entered any points into a data set Once you have defined UNITS and added some points the UNITS option will disappear from the screen You cannot change the units of measure after you have
235. side of this diaphragm causes it to flex slightly The other side of the bridge is referenced through a small tube to atmospheric pressure Flexing the chip causes the resistors on one side of the bridge to stretch while the resistors on the other side compress The result is an unbalance in the current across the bridge that is proportional to the increase in pressure caused by a rising level in the flow stream This bridge is fed from a con stant voltage source so any change in its output is a result of hydrostatic pressure against the transducer Teledyne Isco offers three types of AV sensor for use with the 4250 The 10 foot standard unit is intended for operation in depths from 1 inch to 10 feet maximum The 30 foot standard unit is capable of operation to depths as great as 30 feet The dif ference is in the sensitivity of the pressure transducer used inside The two are not interchangeable You must select the appropriate unit based on the maximum anticipated depth in your flow stream Figure 1 2 Standard Area Velocity Probe 4250 Flow Meter Section 1 Introduction The third type of area velocity sensor is the low profile probe This probe is streamlined for use in shallow flows and small pipes in depths as low as 1 inch 25 mm The area velocity sensor is designed to avoid accumulating debris that could affect readings In rare instances however debris may accumulate inside the opening containing the pressure transducer and
236. sories 4 3 2 Internal Multiple For those needing more than one analog output Teledyne Isco Analog Output Board offers the Multiple Analog Output Board which is installed inside the flow meter This board provides three isolated analog outputs The board is compatible with the existing external 4 20 mA output box 60 1784 039 A flow meter can use either the internal board the external box or both for a maximum number of four analog outputs If your flow meter has both the multiple analog output board and the external analog converter the internal ports will be designated Analog Outputs 1 2 and 3 The external converter will be designated either External or Analog Output 0 The Multiple Analog Output Board consumes a minimum of 16 mA per output consequently the flow meter should be AC powered If you must use battery power you should consider the following to extend battery life e Use a Solar Panel Battery Charger e Use a larger battery either a commercial deep cycle marine type or an Isco 55 Ampere hour lead acid battery e Order only one analog output e Flow meter program choices also affect power consumption Use minimum settings if possible See Section 1 Table 1 6 and Section 5 The outputs from the analog output board are electrically iso lated from the flow meter and from each other by internal DC DC converters The board uses the opening for the modem connector for its outputs Normally
237. ss mono electrode The glass is of special composition sensitive only to hydrogen ions and is exposed to the solution to be measured The specific sensitivity to hydrogen ions prevents interference from other ions that may be present in the solution It is essential to prevent grease fouling of this membrane The glass membrane produces an electrical potential proportional to hydrogen ion activity The other electrode called the reference electrode completes the circuit between the glass electrode and the solution The Isco pH probe combines both electrodes in a single housing and also contains an amplifier to reduce the extremely high impedance of the circuit This improves the reaction of the probe to stray capacitance and reduces interference caused by electrical noise in the vicinity pH measurement is affected significantly by temperature like any other chemical reaction Consequently temperature compen sation is provided in the flow meter The Isco pH probe has a built in temperature sensor that is exposed for faster response The pH probe connects to a Parameter Module that plugs into the Parameter Port on the flow meter The probe has a 25 ft 7 6 m cable For greater distances contact the factory The maximum distance between the module and the flow meter is 1 000 ft 804 8 m When the ion selective electrode and the reference electrode are connected to a high impedance voltmeter and submerged in a solution ions move t
238. sssccccessssececcssssececesesececcsssaaeeecesesaeeeeeseaaees 60 3254 001 4250 Blow Mettete a i ee seces Sallaacds a cies col cba duc ona aedine a AE r E aE E ean 60 3254 009 ACCESSOPY PACKAGE anaa e a AE E KEATEN ET OEE A E A 60 3254 011 Instruction Manual e er e Seta EEE TE EEA EEE A E A TSA EAS 60 3254 012 Pocket Guidea no iei E e E E E A A E A E 60 3253 020 CAUTION TA eraa a a a sad aa Lee nate cea eae TM AU he a a ia 60 3003 256 Dri Can Desiccants enne e eae ik Sak nei te em ah ees eee 099 0012 00 Flow Data Handbooks ma neeaaeia coisa vaadeua tes N A E chee sdavecaus N e 60 3003 041 4250 Accessories Area Velocity Sensor 10 Range 25 cable ccccsscccccessssececesesseceecssssseeecssesseeecesssaseeeenseaaes 60 3254 001 Area Velocity Sensor 30 Range 50 cable ccccsscccccessssececesesseceecsessaeeecnsessececesesaaessenseaaes 60 3254 003 Area Velocity Sensor Low Profile 257 cable cccccccccesssseccecsenneeeceeeaeceeceeaaeeeecnsaaeeeeneaes 60 3254 021 25 Extension Cable for the Area Velocity Probe ccccccccsssseessnseccececeececceeesesensnssaeeeeeees 60 3254 005 Flow Meter to Sampler Connect Cable cccccssssccesssscecceeseeceecceeseneeeceseseeaecesseeeeaeseseeenaaees 60 3004 107 Interrogator Cable FPN s c co cscceccicnes heck etc Ree AART OEE E NA 60 2544 044 Interrogator Cable 25 pith senose nanan a a A A EAE TA i 60 2544 040 Standard Y Cable for Isco Samplers cccccccsssse
239. step We suggest you study the program first then fill out the Pro gramming Worksheets in the back of this manual and program the flow meter last if you are unfamiliar with the unit Step 2 Flow Conversion Type determines how the flow meter calculates flow rate and total flow In general flow is calcu lated for the 4250 from measured level the size and shape of the 2 5 4250 Flow Meter Section 2 Programming 2 6 channel and the velocity of the flow stream Occasionally the 4250 may be used with a primary measuring device In such cases the area velocity sensor will function as a level only mea suring device with velocity as a secondary indicator A primary measuring device is a structure placed across a flow stream through which the entire stream must flow These devices are made in a number of styles and sizes but they all have one thing in common For any type of primary measuring device there is a known relationship between the level in the flow stream ahead of the device and flow rate through the device Consequently after you measure level with the flow meter it can calculate flow rate and total flow from the measured level by consulting built in look up tables Detailed information about many commonly used primary mea suring devices is provided in the Isco Open Channel Flow Mea surement Handbook This book provides formulas flow rates at various levels and values for maximum head as well as much interesti
240. strument Software Model Rev NOT LOGGED ON Com port Instrument type 1 v 4100 4200 6700 C 2100 4700 Path to files Select List of program files Available operations Login to Instrument Login to Module Reset Instrument Hep About esses Exit I Perform Manual Update Progress Idle Figure 5 10 Open the software update program 5 18 Click the Help button and follow the steps listed under Update Instrument Software Do not disturb the connection or stop the update while the file transfer is taking place When the transfer is complete the program displays an Operation successful message Click OK and close the program Your flow meter s software is now updated and ready for oper ation 4250 Flow Meter Appendix A Replacement Parts and Accessories A 1 Replacement Parts The following section contains illustrations and corresponding tables of 4250 Flow Meter replacement parts A list of accessories and optional equipment can be found at the end of this section Replacement parts can be purchased by contacting Teledyne Isco s Customer Service Department Teledyne Isco Inc Customer Service Department P O Box 82531 Lincoln NE 68501 USA Phone 800 228 4373 402 464 0231 FAX 402 465 3022 E mail IscoInfo teledyne com A 1 Appendix A Replacement Parts and Accessories 4250 Flow Meter f 79 80 OF 4 A 74 OF 6 4 9 AQ
241. t Range 0 25 ft 75 mm 5 to 20 ft s 1 5 to 6 1 m s 4250 Flow Meter Section 1 Introduction Table 1 4 Technical Specifications for the Low Profile AV Sensor Weight 2 1 Ibs 95 kg including cable and connector Sensor Dimensions Length 6 00 inches 15 2 cm Width 1 31 inches 3 3 cm Height 0 75 inches 1 9 cm Nose Angle 110 from horizontal Wetted Sensor Material Epoxy chlorinated polyvinyl chloride CPVC Stainless steel Cable Material Polyvinyl chloride PVC chlorinated polyvinyl chloride CPVC Cable Length 25 ft 7 6 m Maximum Distance between sensor and module 75 ft 22 8 m with optional extension cables The distance can be extended up to 1000 ft 300 m with the optional Quick Disconnect Box Operating Temperature 32 to 122 F 0 to 50 C Storage Temperature 40 to 160 F 40 to 71 Level Measurement Range 0 033 to 10 0 ft 0 01 to 3 05 m Maximum Allowable level 20 ft 6 1 m Level Measurement Accuracy 0 033 to 5 0 ft 0 008 ft ft 0 01 to 1 52 m 0 008 m m gt 5 0 ft 0 012 ft ft gt 1 52 m 0 012 m m Accuracy per foot of change from calibrated depth 77 F 25 C Includes non linearity and hysteresis Temperature Coefficient 0 0023 ft F 0 0013 m C Maximum error within operating temperature range at zero pressure per degree of change from calibration temperature
242. tain materials that swell when wet such as sawdust can clog the ports of the probe blocking the hydrostatic pressure of the stream from reaching the transducer The pressure transducer is on the bottom of the probe If you remove the mounting plate from the probe body you will see a protective plate attached with two screws The pressure trans ducer is behind this disk In general it should not be necessary to remove this disk and Teledyne Isco strongly recommends that you do not In the standard AV sensors removing the plate will expose the paper thin diaphragm of the transducer Read the fol lowing sections carefully before attempting to disassemble the probe N CAUTION If you disassemble the AV sensor for cleaning do not touch the stainless steel diaphragm with your fingers or tools The dia phragm is very thin lt 0 003 and easily bent The slightest deformation may result in damage to the trans ducer or the placing of a permanent offset on it In either case the AV sensor will be ruined Do not drop the assembly or sub ject it to any physical abuse The pressure transducer the ultrasonic transducers and the electronic components of the area velocity sensor are encapsu lated in plastic resin and are not user serviceable If any part of the sensor fails contact the Teledyne Isco Service Department It may be beneficial to periodically clean the flow stream up and downstream from the area velocity sensor to maintai
243. te for what is being measured D O pH temper ature etc The flow meter is capable of multiple over ranges INPUT FOR PRINTER LINE B LEVEL FLOW RATE VELOCITY pH OFF TEMPERATURE YSI pH YSI D O YSI SALINITY and YSI TEMP may also appear Again as for line A you can select another condition to plot on the chart The flow meter will again request a full scale value The full scale value can be different from that of line A INPUT FOR PRINTER LINE C e NONE LEVEL FLOW RATE pH D O TEMPERATURE YSI pH YSI D O YSI SALINITY and YSI TEMP may also appear For line C you can select yet another condition to plot on the chart The flow meter will again request entry of a full scale or bottom and full scale value PLOT RAINFALL ON CHART e NO e YES o You must have an Isco Rain Gauge or equivalent connected to the flow meter to measure rainfall Output is recorded in either inches or millimeters There is only one over range for rainfall Go to step 9 and the following display will appear REPORT GENERATOR A ON OFF PRINT This step lets you set up the flow meter to print periodic reports The typical report contains such information as the period of time covered in the report maximum and minimum levels and when they occurred You can define two different reports in this step For example this is used to provid
244. ter s software so generally you will not need this option But it is available for those needing to enter their own values or for those who have a nonstandard primary device for which an equation can correlate level and flow MANNING Flow Conversion uses the Manning formula to cal culate flow in open or closed non pressurized gravity flow situa tions based on slope diameter and roughness of the pipe The Manning formula is named for its developer Robert Manning a 19th century Irish civil engineer There is no primary measuring device as such Instead the pipe with considerations for its slope and internal roughness serves as the primary device The 4250 Flow Meter can calculate flow in round pipes rectangular U shaped or trapezoidal channels based on this formula Data Point Flow Conversion DATA POINTS calculates flow based on a set of user entered data points for a flow stream Data consist of correlated level and flow measurements for the stream Like the Equation method of flow conversion this flow con version is most commonly used where the primary measuring device is nonstandard but where tables of level and flow rate data are available from the device manufacturer The 4250 Flow Meter has space for four sets of data with as many as fifty points per set The flow meter then calculates flow from these data tables using a three point interpolation Adjust Level Parameters calibrates the measuring sensors that provide th
245. ter are listed in Table 1 1 and their functions are briefly described Refer to Figure 1 5 for a view of the connectors and their pin functions The technical specifications for the 4250 Flow Meter are found in Tables 1 2 1 3 and 1 4 The anticipated longevity for a roll of paper used in the internal plotter is shown for various chart speeds in Table 1 5 M Note Various options and accessories used with the 4250 are described throughout the manual For convenience the part numbers for these items are listed on the Accessory Parts List found at the back of Appendix A Replacement Parts List Part numbers for equipment not listed on this sheet are available from the factory 4250 Flow Meter Section 1 Introduction Pin Function A Ground B 12V 12V Ground Flow Pulse Output Bottle Number Input Event Mark Input Inhibit Enable Output tango gt e 12V Ground SDO Rain Gauge Input Sane 12V Ground Sense Line SDO SDI Analog Output Pulse Wn mmga Nma ies Tip C Ring Aneng Oe A Channel 1 Red B Channel 3 Green C Channel 1 White ae D Channel 2 Brown Parameter E Channel 3 Black F Channel 2 Blue 12V Ground Input Signal Temp Temp Switched 12V Input Signal 12V Ground Level Level Rev Rev Xmit Xmit Area Velocity Probe TOAAMDORS OAMOORS Figure 1 5 4250 Side View Showing Connectors and Pin
246. ter of the series This section covers the accessories that are usable with any 4200 Series Flow Meter Application specific options are covered in the Installation sections of each type of flow meter Teledyne Isco offers the following options for use with all 4200 series flow meters e 4200T Modems e 4 20 mA Outputs Internal and External e Model 674 Tipping Bucket Rain Gauge e Flowlink Software used with the modem or a laptop computer e Parameter Probes Temperature pH acidity alkalinity and D O dissolved oxygen e Mechanical Totalizer e High Low Alarm Relay Box e YSI600 Multi Parameter Sonde The 4 20 mA Output Interface alarm box rain gauge and parameter probes are options you can field install any time The modems require factory modification to the flow meter and you should specify these options when you order If you want to add any of these later you will need to return the flow meter to the factory The 4200T Modem is a circuit board installed inside the flow meter that transmits flow meter data over standard telephone lines The modem also makes it possible for the flow meter to receive data from compatible equipment at the other end of the phone line Modems allow digital equipment to talk and listen to other remotely located digital equipment over telephone lines The analog phone system cannot transmit digital signals through repeaters digital machines cannot communicate directly over phone lines Mod
247. th Measure ments below the minimum depth are approximations based on the velocity characteristics of the stream and previous mea surements at other levels Measure from bottom of sensor when determining minimum depth setting Area Velocity Channel Bottom Sensor Figure 2 2 Measuring Minimum Depth 2 14 If you select ZERO LEVEL OFFSET the following will appear ZERO LEVEL OFFSET OFFSET 0 00FT This option lets you mount the probe somewhere other than at the bottom of the channel This is useful when there is a problem with silt or sludge in the center of the channel 4250 Flow Meter Section 2 Programming Enter a value for the vertical distance the probe is installed above the true zero level of the flow stream For example if the probe is mounted on the side of the pipe at a point one foot higher than the true zero level at the bottom of the pipe the zero level offset is one foot See Figure 2 3 Area Velocity Sensor True Zero Point of Channel DEPP eeeeenag Offset Distance W Circumferential Distance Figure 2 3 Measuring Offset Distance M Note Do not confuse the circumferential distance between true zero and the location of the probe with the vertical difference height If you install the probe at the true zero level of the pipe or channel you would enter 0 for the offset Refer also to the installation section for the area velocity sensor If you select ZERO FLOW ON
248. th the right arrow key USE will only appear after four points have been entered USE tells the flow meter that the set is com plete and can be used for the flow rate calculation Select EDIT POINT if you need to change either the level or the flow value for a particular data point Select ADD POINT if you want to add another point to a data set CLEAR will erase an entire set of data points from the flow meter s memory PRINT will make the flow meter print out the entire data set UNITS allows you to set or change the units of measure used in the data set Note that you can only set UNITS if the set is empty or you have cleared it You cannot change the units once you have entered data points into a set unless you clear it and start over SAVE tells the flow meter to save the data set as it is If you select either EDIT POINT or ADD POINT the following display will appear SET X 1 4 DATA POINT XX 1 50 ENTER XX XX level units XXX XXX volume 2 41 4250 Flow Meter Section 2 Programming 2 42 Enter Maximum Head Before advancing from step 2 Flow Conversion to step 3 Adjust Parameters the flow meter will request that you enter a value for Maximum Head Level for the device or flow con version you are using For most standard measuring devices this information is pub lished or is available from the device manufacturer Note that you should not arbitrarily use the largest value available
249. the Quick Disconnect Box Otherwise you must locate the flow meter within 75 feet of the 10 foot AV sensor 100 feet for the 30 foot AV sensor as this is the maximum length of cable available to connect the AV sensor to the flow meter 25 or 50 feet supplied with either AV sensor plus 50 feet maximum with two of the AV sensor extension cables Do not try to add more extension cords If you need greater lengths use the Quick Disconnect Box Figure 3 4 Quick Disconnect Box for the Area Velocity Sensor To use the Quick Disconnect box you will need a cable of the correct length with an M S connector to plug into the flow meter Teledyne Isco will build the cable with the proper connector on one end and stripped wires on the other end as a special order You should power the flow meter from AC if you must use the Quick Disconnect Box especially if you need to run the full 1 000 feet You can install the cable in conduit and connect the conduit to the Quick Disconnect Box or you can run the cable in the open to the Quick Disconnect Box and attach it with a waterproof com pression bushing available from Teledyne Isco If you use conduit use a liquid tight fitting and a washer at the Quick Dis connect Box Wire Color Terminal Number Red 1 Green White Black Orange White Orange Blue IN IOIA JOJN Blue White 3 9 4250 Flow Meter Section 3 Installation J ORANGE WH
250. tions The flow meter keeps in memory any changes that you made for the finished steps all substeps completed before stopping Most steps not finished when you stop will return to the previous selection Programming is done on the flow meter s keypad with prompts from the display The following sections describe the function of each key OFF and ON These two keys turn the flow meter off and on Go To Program Step Pressing this key lets you go directly to a particular program step without passing through all the steps of the entire program The display will ask you to enter the number of the step you want to program Enter the number by pressing one of the number keys There are nine program steps so numbers from one to nine are valid Exit Program Press this key when you want to leave the pro gramming mode and return to the normal operating mode Clear Entry This key lets you return to the previous entry for a program step if you have changed the entry but not yet pressed Enter Enter Program Step This key has two functions One is to enter a program selection into the flow meter s memory Enter The other is to step through the program Program Step 2 2 Programming Procedure 4250 Flow Meter Section 2 Programming Print Program Pressing this key will make the flow meter print out a complete list of the current program choices retained in memory Print Report One function of the flow meter is to print
251. tions will be available to you Pressing the right arrow key may be necessary to bring all items onto the display provided they are available for use LEVEL will only appear if the flow meter is set up to measure level or flow RAINFALL D O pH and TEMPERATURE measurement require the appropriate sensor probe be used with the flow meter Remember that only one parameter condition D O or pH can be measured by the flow meter at a time unless you use the YSI 600 Sonde RAINFALL can appear if you have a rain gauge attached to the flow meter TEMPERATURE can be measured alone or with either parameter D O and or pH may not appear on the menu depending on selections made in step 1 If you do not see the item you need return to step 1 and recheck your programming If you did not make the proper selections there certain menu options will not appear here as they would have been locked out The YSI 600 conditions of pH DO CONDUCTIVITY and TEM PERATURE will only appear on the menu if you have turned them on in steps 1 and 3 4250 Flow Meter Section 2 Programming For any of these conditions you can set the point at which change in the selected condition causes the flow meter to send a flow pulse to the sampler The following menu will appear Selected CONDITION e GREATER THAN LESS THAN RATE OF CHANGE e If you select GREATER THAN the flow meter will ask you to enter a maximum value for the s
252. to the original entry by pressing Clear Entry If you have already pressed Enter however the new value will be in memory To change it press Exit Program If you are in the middle of a program step with multiple substeps the flow meter will display Changes have been made in step press 0 to con tinue or 1 to discard If you press 1 the display will return to normal and the last step you were working on will revert to its previous selection Any program step you completely change before exiting will remain changed You can re enter the program with either Enter or the Go To Program Step keys If you become confused while pro gramming the best suggestion is to press Exit Program and start over Also remember that you can have the flow meter print a complete list of your program choices by exiting the program and by pressing the Print Program key as soon as the display returns to the normal operating condition displaying level and total flow etc 2 3 Description of Program Steps 2 3 1 Step 1 Operating Mode 2 3 2 Step 2 Flow Conversion Type 4250 Flow Meter Section 2 Programming The Program Steps for the 4250 are 1 Operating Mode Flow Conversion Adjust Level Parameters Reset Totalizer Sampler Pacing Sampler Enable Alarm Dialout Printer OMNA AA WD Reports History M Note If you choose NOT MEASURED for any selection the flow meter will make no further reference to that value or function
253. upport life tank gas electroly sis of water Rarely from rock strata Hydrogen HCN Faint odor of bit 0 93 Slight symp 10 6 0 40 0 Near top Insecti Detector tube Cyanide ter almonds toms appear cide and Colorless gas upon exposure rodenti to 0 002 to cide 0 004 0 3 rapidly fatal Gas Chemical Common Specific Physiological Max Max Explosive Range Likely Most Simplest and Formula Properties Gravity or _ _ Effect Safe Safe by vol Location Common ___ Cheapest Vapor 60 Min 8 Hour lin air lof Sources Safe Method Density Exposure Exposure Limits Highest lof Testing Air 1 ppm ppm lower upper Concentration C 7 4250 Flow Meter Appendix C General Safety Procedures Table C 1 Hazardous Gases Continued Specific Gravity Explosive Likely Range by Location Most or Vapor vol in air of Common Density Limits Highest Sources Air 1 PBD ppm lower upper Concentration Max Max Safe Physiological Safe 60 8 Hour Effect Min Exposure Exposure Simplest and Cheapest Safe Method of Testing Chemical Common Formula Properties Hydro HS Irritant and poi Impairs sense i Near bottom Coal gas 1 HS gen Sul sonous volatile of smell rap to but may be petro Ampoule fide compound Rot idly as concen 300 45 0 above bottom if leum ten egg odor in tration airisheatedand sewer gas 2 5 by weight small concentra increases hig
254. urs Days Months B 7 4250 Flow Meter Appendix B Programming Worksheets B 8 Enter Report A Duration Hours 4 Print Report A at Yr Month ___Day ___Hr OIA MH 10 Min Report Generator B On Off Print Report B Duration To Be In Hours Days Months Enter Report B Duration __ Hours Print Report B at Yr ___ Month ___Day ___ Hr Min Print Flow Meter History Yes No Print Flow Meter History Print Since Last Print All NOTES Additional table for Data Point Entry Data Point Set 2 4250 Flow Meter Appendix C General Safety Procedures C 1 Practical Safety Precautions In field installations of 4250 Flow Meters and associated equipment the safety of the personnel involved should be the foremost consideration The following sections provide safety pro cedures for working in and around manholes and sewers the first section offers general safety advice The second section deals with the special problem of hazardous gases found in sewers WARNING The 4250 Flow Meter has not been approved for use in hazardous locations as defined by the National Electrical Code CAUTION Before any flow meter is installed the proper safety precau tions must be taken The following discussions of safety proce dures are only general guidelines Each situation in which you install a flow meter varies You must take into account the indi
255. ut which are available for use if needed You cannot use both serial outputs at the same time You must select one or the other The serial output is paralleled with the Interrogator Port and the Internal Modem Use of either the Interrogator Port or the Internal Modem will cause non standard data to be transmit ted 4 3 4 20 mA Analog These outputs provide connection between a 4250 Flow Meter Outputs External and and non Isco process control equipment such as chlorinators or Internal any other type of equipment that you can control with a 4 20 mil liampere current loop Analog outputs convert digital infor mation from the flow meter to a variable analog output current ranging from 4 to 20 milliamperes When a condition measured by the flow meter is converted into an analog output 4 mA becomes the 0 or baseline for the condition while 20 mA becomes the 100 or full scale of the condition Teledyne Isco offers two different arrangements for providing the 4 20 mA 4 4 4 3 1 External 4 20 mA Output Interface 4250 Flow Meter Section 4 Options and Accessories outputs One is an external box that converts the signals from the flow meter to a 4 20 mA current loop The other is an internal circuit board containing three separate analog output circuits on the same board The 4 to 20 mA current is an industrial standard current loop for process control equipment that must respond to changing condi tions by varying output rates T
256. ward and reverse flows maintains three separate totalizers a separate totalizer for each direction and a totalizer for the difference between forward and reverse flows If you select NO the flow meter will advance to the next step If you select YES the flow meter will reset the internal totalizer to Zero FLOW TOTALIZER XX CF FORWARD XX REVERSE XCF Then if you have sampler enabling turned on step 6 the flow meter will ask you whether you want to reset the totalizer for the total flow during the time the sampler was enabled See step 6 for an explanation of sampler enabling ENABLE TOTALIZER XX CF or other units of measure PRESS ENTER Then RESET SAMPLER ENABLE TOTALIZER e YES e NO If you select step 5 the following will appear SAMPLER PACING e DISABLE VOLUME FLOWLINK e CONDITIONAL This step determines how the flow meter will signal an asso ciated automatic wastewater sampler to take a sample The flow meter and sampler must be connected together with a cable The flow meter sends flow pulses to the sampler The sampler uses these flow pulses as counts When an appropriate number of flow pulses has been received by the sampler it will take a sample VOLUME will not appear if the flow meter is measuring level only or is only being used for parameter monitoring The Flowlink menu option will not appear unless Flowlink software is insta
257. water in a range from 0 to 20 mg l Note that the flow meter can display D O in either mg l milligrams per liter or ppm parts per million depending on your choice in pro gramming M Note The D O module has been discontinued Probes service kits and accessories are still available to maintain existing field units 4 21 4250 Flow Meter Section 4 Options and Accessories Figure 4 9 The D O Probe 4 11 1 How the D O Probe 4 22 Works For effective use of the D O Probe please read and con sider the following before making the installation e The D O Probe requires constantly moving water The probe consumes oxygen during operation this will deplete the oxygen available from stagnant or stratified waters resulting in an inaccurate reading Do not install it in a stilling well or in any location where water movement is intermittent or very low As a guideline a minimum velocity of one foot per second is suggested e Frequent maintenance is necessary when the probe is installed in flows with grease or solids content Tests conducted by Teledyne Isco with probes installed in various waste streams have indicated that greases and solids quickly coat the probe s membrane making it impossible for oxygen to enter the reaction chamber This will result in an abnormally low reading or no reading at all e Cleaning the membrane is generally not effective as it tends to drive the solids further into the membran
258. ween tabs and slots for secure mounting If the slots are loose against the tabs the probe may be swept away by the force of the stream 4 11 5 Probe Operation and The following factors determine the life of the D O probe and the Precautions frequency of service e Membrane life depends on use Membranes will last longer if installed properly and treated with care during use Contents of the flow stream are also important as some substances will foul the membrane very quickly Erratic readings will result from loose wrinkled or fouled membranes or from large bubbles in the electrolyte reservoir If erratic readings or evidence of membrane damage occur you should replace the membrane and the KCI electrolyte e In environments where the membrane becomes rapidly coated with oxygen consuming or oxygen evolving organisms erroneous readings may occur Chlorine sulfur dioxide nitric oxide and nitrous oxide can affect readings by reacting like oxygen at the probe If your readings seem unreasonable you may need to perform analysis to determine whether these gases are the cause Long term use as for monitoring can magnify the effect of these factors in some applications e Avoid any environment containing substances that may attack any of the probe s materials Some of these substances are concentrated acids caustics and strong solvents The probe materials that come into contact with the sample include FEP Teflon acrylic plastic A
259. wer is lost or falls below operating limits the flow meter will stop measuring level the display will go blank and the internal printer will not be able to print However the internal battery backed RAM will retain your program selections and stored data in memory if there is any Note that you must be using FLOWLINK software for any data to accumulate in memory If you combine a 4250 Flow Meter with an Isco Wastewater Sampler in a flow paced sampling system you can power the flow meter from the sampler s power supply Connect the flow meter to the sampler with the Isco flow meter to sampler cable This cable attaches to the Sampler connector on the flow meter and the Flow Meter connector on the sampler The flow meter will then receive power from the sampler Keep in mind that under certain conditions such as a fast setting on the chart speed the flow meter will draw a significant amount of power from the sampler s battery In such cases it is better for the flow meter to have its own battery 3 3 4250 Flow Meter Section 3 Installation 3 2 3 Isco Nickel Cadmium Battery M Note Do not attempt to run a sampler from a power source installed on the flow meter While a flow meter will operate satisfactorily with a power source installed on a sampler the reverse is not true The sampler s pump draws heavy current particularly on start up The flow meter to sampler connect cable cannot carry such currents If you are using a
260. wo conditions to occur before you signalled the sampler In that case you would select AND for the SELECT OPERATOR step Then you would define the second condition Now the flow meter will signal the sampler only after both conditions have changed The next screen on the flow meter after you have established the conditions for sampler pacing will request the following Entering 0 sends no pulses CONDITION TRUE PACING INTERVAL PACE EVERY X MINUTES This option allows you to send flow pulses periodically to the sampler during the time the conditions you established for sampler pacing are being met 2 51 4250 Flow Meter Section 2 Programming 2 52 2 4 9 Step 6 Sampler Enable Then CONDITION FALSE PACING INTERVAL PACE EVERY X MINUTES This option allows you to send flow pulses periodically to the sampler during the time the conditions you established for sampler pacing are not being met Again entering 0 sends no pulses The operation of step 6 Sampler Enable is similar to step 5 Sampler Pacing The menus and options are similar The dif ference is that where sampler pacing only causes the flow meter to send a momentary signal flow pulse to the sampler sampler enabling actually controls an inhibit line to the sampler that can keep the sampler from running its program Sampler enabling is useful where the sampler needs to remain idle for long periods of time such as storm water runoff applications W
261. y e Fewer charge discharge cycles are possible and a single deep discharge can ruin a battery if it discharges all the way to cell reversal e There is a linear voltage decrease as the battery discharges while nickel cadmium batteries show essen tially the same voltage throughout discharge e Failure to recharge promptly and low temperature operation can also ruin the battery Proper operation and maintenance are necessary for normal service life For detailed information on these batteries refer to the Power Products Guide Please read that manual if you intend to use lead acid batteries on your flow meter Attaching the Isco Lead Acid Battery The lead acid battery connects the same way as the nickel cadmium battery Place the battery on top of the case and secure it with the rubber draw catches Attach the connector to the flow meter If your flow meter is permanently installed you may need to allow extra clearance above the flow meter for the slightly greater height of this battery CAUTION Do not test either lead acid or nickel cadmium batteries for the condition of charge by sparking the output shorting the ter minals together with a wire screwdriver or other tool Teledyne Isco also offers two different AC power supplies the High Capacity Power Pack and the Battery Backed Power Pack to power the flow meter These power supplies are designed for operation from 120 Volts AC 50 60 Hz commercial power sour
262. y enabled WHEN ENABLE CONDITION IS NO LONGER MET e DISABLE SAMPLER e e KEEP ENABLED e Or ENABLE CURRENTLY LATCHED RESET e NO e YES 2 4 10 Step 7 Alarm Dialout Mode 4250 Flow Meter Section 2 Programming Select YES to reset the sampler enable feature select NO to leave the sampler enabled PRINTER ON OFF WITH ENABLE e YES e NO This selection allows you to turn the flow meter s internal printer on or off when the sampler is enabled from the flow meter This allows you to conserve battery power and only print a chart when the sampler is enabled This feature is useful for monitoring storm water runoff This step lets you signal an alarm to a remote location from the flow meter The conditions that can cause an alarm are the same as described previously for sampler enabling M Note You must have the optional internal modem installed and con nected to a telephone network to make use of this feature This menu will not even appear if you do not have a modem The flow meter will automatically advance to the next step More information about the modem can be found in Section 4 If you have the modem installed and select step 7 the following will appear ALARM DIAL OUT e DISABLE e CONDITIONAL e e STORM e FLOWLINK e If you select DISABLE this option will be inactivated until you change the selection later The program will advance to the next step If you select STOR
263. ygen pressure is 13 2 of a normal atmosphere At the top of Mt Whitney oxygen is equal to 12 2 t Many hikers go there and to higher peaks as well After adequate acclimation they may climb to the top of Mt Everest where oxygen is equal to only 6 7 The lowest oxygen concentrations that I have observed in a sewer atmosphere was 13 percent It was in a sealed chamber near sea level upstream from an inverted siphon on a metro politan trunk A man would be foolish to enter the chamber Without ventilation he might die but not from lack of oxygen 4250 Flow Meter Appendix C General Safety Procedures It seems unlikely that anyone has ever died in a sewer from suf focation that is a lack of oxygen Deaths have often been attributed to asphyxiation This is a word which according to the dictionary is used to mean death from an atmosphere that does not support life The word has sometimes been misinter preted as meaning suffocation which is only one kind of asphyxi ation In nearly all cases of death in sewers the real killer is hydrogen sulfide It is important that this fact be recognized Many cities diligently test for explosive gases which is very important and they may measure the oxygen concentration which usually is unimportant but they rarely measure H S Death has occurred where it is unlikely that there was any measurable reduction in the oxygen concentration Waste water containing 2 mg per liter o

4250 Area Velocity Flow Meter User Manual

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