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90-FLMV Multi-Parameter Field Logger, v7.2

1. is shown in place of the decimal point until a successful calibration has been performed see section 5 4 5 2 Setting the TDS calibration standard The factory default for this item is 36 00 ppK If this is satisfactory go directly to section 5 3 1 Select the TDS Standard entry gt F4 Setup gt F1 Standards gt F2 TDS The following screen is now displayed 2 Type in the value of the TDS standard that is to be used for calibration including the decimal point Use the e key to make any corrections 3 Press to save the value of the standard solution Alternatively press V7 to quit without changing the current setting 4 The 90 FLMV will now ask you to enter the units for the TDS standard Press to set the TDS Standard as ppM parts per Million Press to set the TDS Standard as ppK parts per Thousand 5 The TDS standard is now programmed for use at calibration 22 5 3 Setting the TDS sensor k factor The 90 FLMV automatically recognises a k 10 sensor If a k 10 sensor is being used go directly to section 5 4 The 90 FLMV does not automatically recognise k 0 1 or k 1 sensors When a k 0 1 or k 1 sensor is used the 90 FLMV must be set to the correct k factor before use To select a k 0 1 or k 1 sensor 1 Select k factor entry e gt F4 Setup gt F4 k factor 2 The k factor entry screen is now displayed The arrow indicates the current selection Press if a k 0
2. will not be removed after a zero calibration Standard Calibration 7 Place the TDS sensor into a sample of TDS standard Ensure that it is immersed correctly as per the diagram below DO NOT place the sensor directly into the bottle of standard Discard the used sample of standard after use O O Y Plastic body k 10 Plastic body k 0 1 Glass body k 0 1 and k 1 Sensors Sensor Sensor 8 Select TDS Calibration e gt Fl Calibrate gt F2 TDS The calibration screen will be displayed with the TDS standard to be used For example 9 When the reading has stabilised press to calibrate The will now be replaced by a decimal point if calibration was successful 10 The 90 FLMV is now calibrated for TDS and is ready for use in this mode Ensure that the sensor is immersed at least as deeply as per the diagram in step 7 for all sample measurements 24 5 5 1 TDS Calibration Notes A Zero calibration should be performed at least monthly In low TDS applications where a zero error is particularly significant a zero calibration may have to be done weekly 2 A Standard calibration should be performed at least weekly Of course more frequent calibration will result in greater confidence in results 3 Conductivity and TDS calibration data is stored separately in memory Ensure that the 90 FLMV has been correctly calibrated for the mode in which it will be used The 90 FLMV does not require re calibration when alternat
3. 1 Switch the meter on Measure the temperature of the sample 2 3 Select Temperature Calibration 9 5 Fl Calibrate gt F2 Temperature 4 The current temperature setting is now displayed For example 5 Enter the temperature of the sample using the Numeric Keypad Press to save the new value Alternatively press V7 to quit and retain the current setting 6 When returning to normal measurement mode note the M in the temperature readout indicating that Manual Temperature Compensation is in use For example 33 9 Good Laboratory Practices GLP The 90 FLMV keeps a record of the date and time of the last calibrations for all parameters as part of GLP guidelines 9 1 To recall GLP information on the display 1 Switch the meter on 2 Select the GLP menu e gt F4 Setup gt F2 GLP 3 Select F1 Recall from the menu 4 The instrument model firmware version number and instrument serial number are displayed along with a prompt describing how to scroll through the GLP information 90FLMVm V6 0 S1234 31 12 00 12 00 F4 Next The m after the model name is displayed when the Dissolved Oxygen stirrer is enabled 5 Press the key to sequentially scroll through the GLP information for all parameters Press the key to scroll back to previous data The sequence of information displayed is shown below Press to abort at any time GLP Display sequence 90FLMVm V6 0 S1234 31 12 0
4. F1 Recall F3 Print F4 Initialise Meter F1 A Pond No B F2 A Pond B Data F3 A Data NoB F4 A amp B Data F5 OFF Fl k 1 F2 k 1 F1 OFF F2 5 minutes F3 1 hour F1 300 F2 9600 F3 19200 12 3 Dissolved Oxygen Mode 3 1 Selecting Dissolved Oxygen Mode 1 2 Select Dissolved Mode e gt F2 Mode gt Fi1 Oxygen The Dissolved Oxygen readout units selection screen is now displayed The arrow indicates the current selection Press to select Dissolved Oxygen readout in ppm units This selection will not apply Salinity correction to the displayed readings Press 2 to select Dissolved Oxygen readout in Salinity corrected ppM units This selection will use the Conductivity or TDS reading for automatic salinity correction Press to select Dissolved Oxygen readout in Saturation units Press Y to select Dissolved Oxygen readout in Gaseous units Press Y to quit without changing the current setting 3 2 Dissolved Oxygen Calibration 1 2 3 4 5 Plug the Dissolved Oxygen sensor into the Oxygen socket Switch the meter on Select the Dissolved Oxygen readout mode to be used as detailed in section 3 1 Ensure that the Temperature readout has been calibrated see section 8 1 or manually set see section 8 4 when calibrating either of the ppM modes Rinse the Dissolved Oxygen sensor in distilled water and bl
5. If you have any doubts about any of these steps then you should consider returning the electrode to the factory The cost of replatinising is quite low and you will be guaranteed of the best possible result Sensor Connector 66 18 3 pH pH electrodes are generally combination electrodes where the pH sensing membrane and the reference system are contained in a single body The sensing membrane is the round or spear shaped bulb at the tip of the electrode This produces a voltage that changes with the pH of the Solution This voltage is measured with respect to the reference section The reference section makes contact with the sample solution using a salt bridge which is referred to as the reference junction A saturated solution of KCl is used to make contact with the sample It is vital that the KCI solution has an adequate flow rate in order to obtain stable accurate pH measurements 18 3 1 Asymmetry of a pH or Specific Electrode An ideal pH electrode produces 0 mV output at 7 00 pH In practice pH electrodes generally produce 0 mV output at slightly above or below 7 00 pH The amount of variance from 7 00 pH is called the asymmetry Figure 18 1 illustrates how asymmetry is expressed for a pH electrode Response of pH Electrode as a Function of Asymmetry 1 00 pH Asymmetry 0 00 pH Asymmetry 1 00 pH Asymmetry Figure 18 1 67 18 3 2 Slope of a pH Electrode As mentioned above a pH electrode p
6. Readings are low or near zero Sensor may have a build up of dirt or oily material on electrode plates Sensor is not immersed correctly Sensor is faulty Faulty instrument Clean sensor as per the instructions detailed in section 18 2 1 Immerse sensor correctly as per diagrams in section 4 4 Return sensor to factory for repair or replacement Return to factory for repair 17 4 pH and Redox Troubleshooting 59 Unit fails to calibrate even with new pH probe Calibration settings outside of allowable limits due to previous failed calibration 1 Point calibration fails pH asymmetry is greater than 1 00 pH Reference junction blocked Reference electrolyte contaminated 2 Point calibration fails pH slope is less than 85 0 pH Buffers not correctly set pH glass bulb not clean Electrode is aged Connector is damp pH Buffers are inaccurate Unstable readings Reference Electrolyte chamber needs to be refilled Reference junction blocked pH glass bulb or Redox platinum tip not clean Bubble in pH glass bulb Faulty connection to meter Reference junction not immersed KCl crystals around reference junction inside the electrolyte chamber Inaccurate readings even when calibration is successful Reference junction blocked Displays constant reading Electrical short in connector around pH7 00 or 0 mV for all solutions Displays 4 5 pH for all
7. 3 The 90 FLMV now proceeds to the A data entry screen Use the numeric keypad to key in up to four characters for the A data item The decimal point is available Press to record the A data item or press to quit Quitting at this point records Zero s as the A and B data items 4 The 90 FLMV now proceeds to the B data entry screen Use the numeric keypad to key in up to four characters for the B data item The decimal point is available Press to record the B data item or press E to quit Quitting at this point records a Zero as B data item 5 Repeat steps 1 to 4 as often as required The maximum number of readings that can be stored in the Logger with this A amp B Data Input setting is 5950 40 10 3 Automatic Datalogging The 90 FLMV can automatically log records into the Logger There are three automatic datalogging modes to choose from 1 Rate Per Day Logs from 1 to 288 readings per day evenly spaced throughout each 24 hour period Unit is dormant between readings and wakes up when a reading is due Dissolved Oxygen stirrer is switched on for 40 seconds before each reading is logged 1f Dissolved Oxygen stirrer output is enabled Unit continues to log until automatic datalogging is disabled or until the memory is full 2 Time of Day Logs at up to12 discrete times of the day which can be unevenly spaced throughout each 24 hour period Unit is dorma
8. 31 02 2001 the 90 FLMV displays the message Invalid Date then returns to the date setting screen so that the correct date can be entered 4 The 90 FLMV also tests for leap years 53 13 Initialising the 90 FLMV If the calibration settings of the 90 FLMV exceed the allowable limits the unit may need to be initialised to factory default values This action may be required if a sensor is replaced or if the memory is corrupted To initialise the 90 FLMV l 2 3 14 Select the GLP menu e gt F4 Setup gt F2 GLP Select FA Initialise Meter from the menu The 90 FLMV will now ask if you are sure that you wish to initialise the unit Press to initialise the 90 FLMV and reset all calibration data and erase all logged readings Press to quit and retain the current calibration settings and logged readings If F1 Yes was selected above the 90 FLMV will display the number of logged readings in memory and provide an additional warning that these will be erased For example Press to initialise the 90 FLMV and reset all calibration data and erase all logged readings Press to quit and retain the current calibration settings and logged readings If F1 Yes was selected above the 90 FLMV will display the following messages to indicated that the unit has been successfully initialised The meter then goes back to the GLP menu When returning to display mode later note that each of the
9. All readings are converted to uS cm to ensure that the data is logical when analysed with other programs PpM for parts per Million TDS readout All readings are converted to ppM to ensure that the data is logical when analysed with other programs is pH data 5 characters right justified is the pH unit description sent as pH is mV data 5 characters right justified is the mV unit description sent as mV is Temperature data 5 characters right justified is the Temperature unit description Sent as oC for measured temperature data or oM for manual temperature data is the Low Battery indicator Sent as L when the battery is below 5 60 volts Caution Data recorded with a low battery may be unreliable The 90 FLMV sends a space when the battery is above 5 60 volts Continued over the page 49 Data format continued aaaa A Data input 4 characters left justified A A Data input identifier Sent as A for A Data or P for Pond number See section 10 1 for further details on the A and B Data input function bbbb B Data input 4 characters left justified B B Data input identifier Sent as B See section 10 1 for further details on the A and B Data input function Notes 1 The aaaaA and bbbbB sections of the data string are not sent at all when the A and B data input function is switched off see section 10 1 2 When requeste
10. appreciably higher flow rates 5 litres minute Fluctuations in readings due to air bubbles passing through the membrane are a different matter however With the type of electrode to be used with this instrument very little change in diffusion current is caused by altering the pH of the external environment Pressure changes over a moderate range exerted on the membrane also cause no change The EDYSI has a pressure compensation diaphragm to allow submersion to 60 metres 64 18 2 Conductivity TDS 18 2 1 Care Cleaning and Maintenance of Conductivity Sensors Care of Conductivity sensors The conductivity section of the sensor supplied with your 90 FEMV consists of two platinum plates that are plated with a layer of platinum black This is quite a soft layer and is required for stable accurate measurements In time the platinum black layer may wear off in some applications at which time the sensor will require replatinising see detail later in this section You can help to maintain the platinum black layer by following these simple rules l 2 NEVER touch or rub the electrode plates with your fingers cloth etc Avoid using the sensor in solutions that contain a high concentration of suspended solids such as sand or soil which can abrade the electrode plates Filter these types of solutions first if possible Avoid concentrated acids If you must measure acids remove the sensor immediately after taking the measurement an
11. g s 2 REIR te ice dba dsc 28 FEM ds DI Ic iaa 29 7 1 Millivolt Measurements 2 c crit ie e telle HE O 29 8 Temperature Mode 1iccuie caue cuenu cc entum aun onum idc magum dd dn aun non Yan idc NAE 30 8 1 Temperature Calibration iie ieri ettet ei thee Ee at aei 30 8 2 Temperature Calibration Notes ner P ne E et e i diia 31 8 3 Calibration Messages ic enr a apti dern eee et ei e Pei Ee ER HE CER HL EXE FEE RH neas dele 31 8 4 Manual Temperature Setting eiie tert Herten p sane call eee Ee Ee PREDA oiia 32 9 Good Laboratory Practices GLP cocinan 33 9 1 To recall GLP information on the display seen nennen 33 9 2 Failed Calibracion roda italia 35 9 3 Printing GLP Information to the RS232 Port esses neret rennen nennen nennen nenne 35 9 4 Instrument Serial Number coe reete e e e bedi o eee te euadere 36 9 5 Additional GEP Beatutes octets retro ere reo dictada 36 10 ricirneetem 37 10 1 Setting the A amp B Data Input Function eee cesecsseceseceseeeseeseeeeeaeeeaeeeaeecaaecaaecsaeseeesseeeeneeees 37 10 2 Manually Recording Readings into the Logger oo eee eese eene emen 37 10 3 Automatic Datalos SIMS caricia a eaaet tp das eati eat eo ates ade accio adas 40 10 4 Recalling Readings from the Logger eeeeeeeeeeeeeeeeeeeeennen nennen ener nennen 44
12. back into the bottle and re fit the bottle onto the rear cover of the instrument Re fit the rear cover onto the instrument ensuring that is the correct way around The cover has locating lugs in two of the corners to make correct fitment simple 56 17 Troubleshooting 17 1 General Errors Factory Calibration Data Failure EEPROM Write Failure Return to Factory for Service Flashing Meter displays the word OFF and switches off Meter will not turn on Battery does not charge up when charger is connected The EEPROM chip which contains the factory calibration information has failed User calibration settings have been lost or corrupted Battery is below 5 60 volts Battery is below 5 10 volts Battery is exhausted 1 Faulty battery charger 2 Faulty battery The unit must be returned to TPS for service Switch the meter OFF and switch back ON If the problem persists return the unit to TPS for service Recharge the battery A full charge will take approximately 18 hours Note that the unit will switch itself off when the battery falls below 5 10 volts Data obtained while the s flashing may be unreliable Do not take readings or calibrate while the Recharge the battery Tf this fails check the charger If charger is OK replace the battery Recharge the battery for approximately 18 hours If this fails check the charger If charger is OK replace the battery Conne
13. decimal points has been replaced with a to indicate that each parameter requires re calibration Instrument firmware version number If you need to phone or fax TPS for any further technical assistance the version number of your 90 FLMV firmware may of benefit to us The version number is displayed by the 90 FLMV at turn on 54 15 Battery Saver Function The 90 FLMV is equipped with a battery saver function If no button has been pressed for 5 minutes or 1 hour the unit beeps and flashes the display for 20 seconds and then shuts off This function can also be switched off for continuous use To program the battery saver function 1 Select Battery Saver menu e gt F5 System gt Fl Bat Saver 2 The battery saver menu is now displayed The arrow indicates the current selection 3 Press to disable the battery saver function for continuous use Press to set the battery saver function to 5 minutes The meter will switch itself off if no key has been pressed for five minutes Press to set the battery saver function to 1 hour The meter will switch itself off 1f no key has been pressed for 1 hour Press V7 to quit the battery saver menu and retain the current setting Notes 1 The symbol flashes when the battery volts drops below 5 60 volts At approximately 5 10 volts the meter turns itself off 2 The accuracy of the data degrades when the B symbol is flashing The 90 FLMV should not be
14. for repair in perfect working order This can occur where batteries simply require replacement or re charging or where the electrode simply requires cleaning or replacement TPS Pty Ltd has a fine reputation for prompt and efficient service In just a few days our factory service engineers and technicians will examine and repair your equipment to your full satisfaction To obtain this service please follow this procedure Return the instrument AND ALL SENSORS to TPS freight pre paid and insured in its original packing or suitable equivalent INSIST on a proof of delivery receipt from the carrier for your protection in the case of shipping claims for transit loss or damage It is your responsibility as the sender to ensure that TPS receives the unit Please check that the following is enclosed with your equipment e Your Name and daytime phone number e Your company name ORDER number and return street address e A description of the fault Please be SPECIFIC Note Please Repair does NOT describe a fault Your equipment will be repaired and returned to you by air express where possible For out of warranty units a repair cost will be calculated from parts and labour costs If payment is not received for the additional charges within 30 days or if you decline to have the equipment repaired the complete unit will be returned to you freight paid not repaired For full account customers the repair charges will be debited to your
15. half that of pH6 88 buffer and is therefore much less stable pH9 23 and pH10 06 buffers are highly unstable Avoid using these buffers if possible Discard immediately after use If you wish to use a pH buffer other than one of those listed above its value can be keyed in during calibration Make sure that you have pH versus Temperature data for the buffer 26 6 2 pH Calibration l Plug the pH sensor into the pH socket and the Conductivity TDS or Temperature sensor into the COND SAL socket Switch the meter on Ensure that temperature has already been calibrated see section 8 1 or manually set see section 8 4 NOTE The decimal point in the Temperature reading is shown by a when the temperature readout is not calibrated Remove the wetting cap from the pH sensor Rinse the pH and Conductivity TDS or Temperature sensors in distilled water and blot them dry Ensure that the primary and secondary buffers to be used have been correctly selected for automatic buffer recognition See section 6 1 Place both electrodes into a small sample of primary buffer pH6 88 or 7 00 so that the bulb and reference junction are both covered as per the diagram below Use either the Conductivity TDS or lt Temperature sensor depending on which is connected A narrow gt calibration vessel reduces pH buffer consumption The pH bulb UY must be kept clean at all times Constant gentle st
16. menu 6 gt F3 Logger gt F2 Erase The 90 FLMV now displays the Erase menu for example The number of readings stored in the Logger is displayed See the 100 in the example above Press to erase all of the readings stored in the Logger Press to erase the last recorded reading only Press V7 to quit without erasing any records 10 6 Printing Records from the Logger to the RS232 Port 1 2 Connect one end of the RS232 cable to the Charger socket of the 90 FLMV Connect the other end of the RS232 cable to an RS232 Printer or to the COMI or COM2 ports of a PC Ensure that the baud rate for the printer or PC and the 90 FLMV are the same If necessary alter the baud rate of the 90 FLMV see section 11 1 The 90 FLMV uses XON XOFF protocol Ensure that the printer is set accordingly Select the Logger menu e gt F3 Logger Select F3 Print Log from the menu or press Print Printing starts as soon as E or is pressed The display shows the word Printing until printing is completed 46 11 RS232 Port 11 1 Setting the Baud Rate 1 Select the Baud Rate menu e gt F5 System gt F3 Baud Rate 2 The available baud rates are listed along with the RS232 port configuration The arrow indicates the current selection 3 Press to select 300 baud Press to select 9600 baud Press to select 19200 baud Press Y to quit and retain the current setting 11 2 Sending Readings to the
17. of conductive material such as salt Sensor is faulty Faulty instrument Sensor may have a build up of dirt or oily material on electrode plates Platinum black coating has worn off Check that the k factor is set correctly when not using a TPS k 10 sensor Initialise the unit See section 13 Thoroughly rinse sensor in distilled water and allow to completely dry in air before attempting zero calibration DO NOT rub the platinised electrode surfaces If instrument does not calibrate at Zero with sensor disconnected then the instrument is faulty Immerse sensor correctly as per diagrams in section 4 4 Clean sensor as per the instructions detailed in section 18 2 1 Sensor requires replatinization as per section 18 2 1 Alternatively return to the factory for replatinization Replace standard solution Return sensor to factory for repair or replacement Return to factory for repair Replace standard solution Clean sensor as per the instructions detailed in section 18 2 1 Return sensor to factory for repair or replacement Return to factory for repair Clean sensor as per the instructions detailed in section 18 2 1 Sensor requires replatinization as per section 18 2 1 Alternatively return to the factory for replatinization Readings drift Clean sensor as per the instructions detailed in section 18 2 1 Sensor may have a build up of dirt or oily material on electrode plates
18. of precision is required 7 When a second point calibration is being performed the 90 FLMV will now display the second calibration screen Please note that the sensor must now be placed into a container of water that is at least 10 oc higher or lower than the first calibration point An insulated container with around 1 Litre or more of water will provide a stable environment to do the second point Temperature calibration The Temperature of the water in a small uninsulated container will change too rapidly making a successful second point calibration virtually impossible 8 3 1 31 The current reading from the sensor is displayed on the far right of the top line When this reading has stabilised use the Numeric Keypad to enter the same temperature as measured by the mercury thermometer Press the key to calibrate the temperature readout Alternatively press the V7 key to abort the second point temperature calibration The first point calibration settings will still be preserved The 90 FLMV is now Temperature calibrated and is ready for use in this mode The full 0 2 C accuracy specification will apply after a successful 2 point calibration Temperature Calibration Notes Temperature calibration information is retained in memory when the 90 FLMV is switched off This information can be recalled later using the GLP function see section 9 Temperature does not need to be re calibrated unless the Conductivity TDS or T
19. to 1000 ppM to T0 3 ppK k 10 Sensor ppM 0 5 of full scale of ppM selected range at 25 C ppK ppK Note Ranges are automatically selected Exact auto ranging points and full scales are subject to sensor performance Sensor Type casei trente Ryton plastic body with two platinised platinum plates with in built ATC Temperature Compensation Automatic 0 to 100 9C standard Conductivity sensor is limited to 60 C Calibration esee Automatic zero and span calibration Sensor Span Range 25 of nominal k factor 1 10 4 pH Sensor Type se Glass bulb pH sensor combination or half cell Input Impedance gt 3 x 10 Ohms Temperature Compensation Automatic 0 to 100 9C Calibration eitis Automatic asymmetry and slope calibration Automatic Buffer Recognition pH4 00 pH6 88 pH7 00 pH9 23 amp pH10 06 Any other can be entered during calibration Sensor Asymmetry Range 1 00 to 1 00 pH Sensor Slope Range 85 0 to 105 0 1 10 5 Millivolts Sensor Type uiis ino T Platinum tip ORP sensor combination or half cell Ion Selective Electrodes can also be used in this mode Input Impedance eee gt 3 x 10 Ohms 1 10 6 Temperature Note When using Conductivity TDS sensor for T
20. used to take readings or calibrate while the 3 is flashing 55 16 Moisture Protection 16 1 Silica Gel Pack Due to the size of the 90 FLMV enclosure it tends to expand in hot environments and contract in cold environments This process can cause moist air to be drawn into the enclosure which would then cause corrosion damage to the circuit To avoid this problem TPS has mounted a breathing system inside the enclosure This system consists of a long thin tube which is vented to the atmosphere at one end and into a bottle of Silica gel at the other end This ensures that the 90 FLMV breathes dry air In humid environments the Silica gel pack should be regularly checked To check the Silica gel pack l Ze Undo the 4 plastic screws on the rear of the unit Inspect the bottle of Silica gel Blue indicates that the Silica gel is still dry proceed to step 5 Pink indicates that the Silica gel is moist proceed to step 3 Empty the Silica gel into a microwave proof dish and place it into a microwave oven Place approximately 100mL water in a microwave proof cup into the microwave oven This will absorb some of the microwave energy and stop the Silica gel balls bursting Turn the microwave oven ON using a moderate setting for approximately 1 minute or until the Silica gel turns blue CAUTION THE SILICA GEL MAY BE VERY HOT AT THIS POINT Remove the Silica gel from the microwave oven and allow to cool Pour the Silica gel
21. 0 12 00 F4 Next Oxygen Zero 0 1 31712700 12 00 Oxygen Calibrated F2 Back F4 Next Oxygen Span 100 0 31 12 00 12 10 Oxygen Calibrated F2 Back F4 Next Cond Zero 0 01uS 31 12 00 12 20 Cond Calibrated F2 Back F4 Next Cond k 10 1 31 12 00 12 40 Cond Calibrated F2 Back F4 Next TDS Zero 0 01ppM 31 12 00 12 50 TDS Calibrated F2 Back F4 Next Continued over the page 34 GLP Display sequence continued 35 9 2 Failed Calibration If calibration has failed the GLP function will reset the date and time for the failed parameter to zero The 90 FLMV still shows the results for the last successful calibration as shown in the following example of a failed pH calibration 9 3 Printing GLP Information to the RS232 Port The GLP information stored in the instrument s memory can be sent to a printer or PC via the RS232 port 1 Switch the meter on 2 Connect one end of the RS232 cable to the Charger socket of the 90 FLMV The battery charger optional battery adaptor or optional solar panel may be connected to the in line socket on the RS232 cable 1f required 3 Connect the other end of the RS232 cable to an RS232 Printer or to the COMI or COM2 ports of a PC 4 Send the GLP information to the RS232 port gt F4 Setup gt F2 GLP gt F3 Print or Print The message Printing GLP Data is displayed while sending the data to the RS232 port 5 The GLP information is sent to the RS232 port in formatted ASC
22. 1 sensor is being used Press if a k 1 sensor is being used Press V7 to quit without changing the current setting Notes 1 The manual k factor selection is kept in memory when the meter is switched off 2 The manual k factor selection is reset to k 1 during initialisation 3 The 90 FLMV will always automatically recognise a k 10 sensor regardless of the manual k factor selection 4 Calibration settings for k 0 1 k 1 and k 10 sensors are NOT stored separately The 90 FLMV requires re calibration when a new k factor sensor is connected 23 5 4 TDS Calibration Before attempting a TDS calibration ensure that the 90 FLMV has been set up correctly according to sections 5 1 to 5 3 1 2 Plug the TDS sensor into the Cond Sal socket Rinse the TDS sensor in distilled water Shake off as much water as possible Blot the outside of the sensor dry DO NOT BLOT THE ELECTRODE PLATES Zero Calibration 3 Let the sensor dry in air 4 Select TDS Calibration e gt Fl Calibrate gt F2 TDS 5 The 90 FLMV will recognise the low TDS signal and attempt a Zero calibration For example 6 When the reading has stabilised at or near zero press to calibrate or V to quit The x
23. 10 5 Erasing Records from the Logger eese nennen eren nenne 45 10 6 X Printing Records from the Logger to the RS232 Port eessssesseseeseeereeee nennen 45 11 RAP prs 46 11 1 Setting the Baud Rate io biete race A 46 11 2 Sending Readings to the RS232 Dort eee setae teen a tei ep ibas Ee ede ida 46 11 3 RS232 Contigurations iii onore ebd bieten idee esaet ope b ea ee hae labeo idas 46 11 4 Communication and Statistical Software esses 46 WDD EE A ve elven cesdee aut cave veesdtce ouasuncsavieldesasdesusevasssanessaecbuavebedieeedvayeatenentveneanlevstvody 46 MAG Data Fomati NON 48 1L7 SI O 49 11 8 Importing Data into Microsoft Excel enne nee rennen rennen 50 12 Sen g ME CLOG vctus 52 13 Initialising the QO FLIMV e eere seas snes sae eseeedenedaeesanedsuenseeeseeeseoessenseeessnesones 53 14 Instrument firmware version number eese eene nnn nnnm rara ana 53 15 Battery Saver FUNCION 54 16 Moisture Protection 55 16 1 Silica Gel iC cr O 55 17 Troubleshooting nians AEEA AAEE A AAA AEA ARARE 56 17 1 SC UOCE DELE 56 17 2 Dissolved Oxygen Troubleshooting eese nennen en ren rennen 57 17 3 Conductivity TDS Troubleshooting essent nennen enn enr eterne nnne 58 17 4 pH and Redox Troubleshooting esee ene
24. 3 The 90 FLMV will always automatically recognise a k 10 sensor regardless of the manual k factor selection 4 Calibration settings for k 0 1 k 1 and k 10 sensors are NOT stored separately The 90 FLMV requires re calibration when a new k factor sensor is connected 19 4 4 Conductivity Calibration Before attempting a Conductivity calibration ensure that the 90 FLMV has been set up correctly according to sections 4 1 to 4 3 l Ze Plug the Conductivity sensor into the Cond Sal socket Rinse the Conductivity sensor in distilled water Shake off as much water as possible Blot the outside of the sensor dry DO NOT BLOT THE ELECTRODE WIRES Zero Calibration 3 Let the sensor dry in air 4 Select Conductivity Calibration eJ gt Fl Calibrate gt F2 Conductivity 5 The 90 FLMV will recognise the low conductivity signal and attempt a Zero calibration For example 6 When the reading has stabilised at or near zero press to calibrate or V to quit The x will not be removed after a zero calibration Standard Calibration 7 Place the Conductivity sensor into a sample of Conductivity standard Ensure that it is immersed correctly as per the diagram below DO NOT place the
25. 3 minutes before the next reading is due to ensure that the Dissolved Oxygen sensor is fully polarised The unit will therefore not automatically log any readings for at least 3 minutes after it has been switched OFF even if a reading is due during that time 43 10 3 3 Sampling Period and Duration Datalogging Programming Sampling Period and Duration Datalogging 1 Select the Logger Program menu e gt F3 Logger F5 Program 2 SelectF3 Sampling Period and Duration from the menu 3 The 90 FLMV now prompts you to enter the sampling period in seconds The current sampling period is displayed Use the Numeric Keypad to set the 90 FLMV to log a reading every 1 to 300 seconds Press to save the new sampling period and move to setting the duration Press V7 to retain the previous sampling period and move to setting the duration 4 The 90 FLMV now prompts you to enter the duration in minutes The current duration is displayed Use the Numeric Keypad to set the total duration for which the 90 FLMV will log readings into memory from 1 to 720 minutes Alternatively enter O to log continuously until logging is stopped by the user or the memory is full Press to save the new duration Press to quit and retain the previous duration 5 The Sampling Period and Duration datalogging is now programmed and can be started and stopped as required Starting and Stopping Sampling Period and Duration Datalogging Starting and stopping Sampl
26. 6 1 Selecting the pH Buffer Set The 90 FLMV can be programmed to automatically recognise any of the following buffer sets during pH calibration All pH values listed below are at 25 C l 2 3 4 pH4 00 pH6 88 pH9 22 pH4 00 pH6 88 pH10 06 pH4 00 pH7 00 pH9 22 pH4 00 pH7 00 pH10 06 To select the pH buffer set for automatic recognition 1 Select the pH Buffer set up menu 3 F4 Setup gt Fl Standards gt F3 pH Buffers The primary buffer selection menu is now displayed The arrow indicates the current selection Press to select pH6 88 as the Primary Buffer Press to select pH7 00 as the Primary Buffer Press V7 to quit without changing the current setting The secondary buffers selection menu is now displayed The arrow indicates the current selection Press to select pH4 00 and pH9 22 as the Secondary Buffers Press to select pH4 00 and pH10 06 as the Secondary Buffers Press V7 to quit without changing the current setting Notes p D pe The selected buffer set is kept in memory when the meter is switched off The buffers are re set to pH4 00 pH6 88 and pH9 23 during initialisation pH6 88 buffer is a DIN 19266 and NBS Primary standard pH solution Its use as the primary buffer is highly recommended for the most accurate possible results If pH7 00 buffer is used ensure that it is manufactured to at least 0 01 pH accuracy pH7 00 buffer has a buffer capacity less than
27. Congratulations The 90 FLMV is complete water quality logger in a single portable unit It combines Dissolved Oxygen Conductivity TDS pH Millivolts and Temperature Despite its impressive list of features the 90 FLMV is a breeze to operate This manual has been designed to help you get started and also contains some handy application tips If at any stage you require assistance please contact either your local TPS representative or the TPS factory in Brisbane The manual is divided into the following sections 1 Table of Contents Each major section of the handbook is clearly listed Sub sections have also been included to enable you to find the information you need at a glance Introduction The introduction has a diagram and explanation of the display and controls of the 90 FLMV It also contains a full listing of all of the items that you should have received with unit Please take the time to read this section as it explains some of items that are mentioned in subsequent sections Main Section The main section of the handbook provides complete details of the 90 FEMV including operating modes calibration troubleshooting specifications and warranty terms Appendices Appendices containing background information and application notes are provided at the back of this manual TPS Pty Ltd 4 Jamberoo Street Springwood Brisbane Australia 4127 Phone 07 32 900 400 International 61 7 32 900 400 90 FLM
28. II text For example 90FLMV V6 0 S1234 31 12 2000 12 00 Oxygen Zero 0 15 a 31 12 2000 12 00 Oxygen Span 100 0 31 12 2000 12 10 Conductivity Zero 0 01uS 31 12 2000 12 20 Conductivity k 1 01 31 12 2000 12 30 TDS Zero 0 01ppM Q 31 12 2000 12 40 TDS k 1 01 31 12 2000 12 50 pH Asy 0 10pH 31 12 2000 13 20 pH Slope 99 0 31 12 2000 13 30 Temperature Offset 1 00C 31 12 2000 14 20 Temperature Span 100 0 31 12 2000 14 30 Ends 36 9 4 Instrument Serial Number In case the serial number that is fitted to the rear of the 90 FLMV is removed or becomes illegible it is also available on the 90 FLMV display 1 The serial number is displayed at turn on for example The m after the model name is displayed when the Dissolved Oxygen stirrer is enabled 2 The serial number is displayed when recalling the GLP information section 9 1 3 The serial number is included on the print out of GLP information section 9 3 4 The GLP information can be downloaded to a PC using the optional Windows software part number 130086 9 5 Additional GLP Features Another GLP requirement is to record the date and time of every reading The 90 FLMV does this for you when readings are recorded either with the Manual Datalogging function section 10 2 or the Automatic Datalogging function section 10 3 37 10 Datalogging 10 1 Setting the A amp B Data Input Function The A amp B Data Input function allows th
29. RS232 Port Press to instantly send readings to the RS232 port whenever the 90 FLMV is in normal display mode Each time the 90 FLMV logs a reading that reading is sent directly to the RS232 port Press while recalling data on the display see section 10 4 to send that record to the RS232 port 11 3 RS232 Configuration The 90 FLMV RS232 configuration is 8 Bits No Parity 1 Stop Bit XON XOFF Protocol This information is displayed when setting the baud rate see section 11 1 11 4 Communication and Statistical Software Communication between the 90 FLMV and a PC can be handled with any RS232 communication software A TPS communication software package for Windows is optionally available part number 130086 Once the data is saved to disk the next problem is how to use it The data sent by the 90 FLMV is formatted in fixed width columns that can be imported by programs such as Microsoft Excel and Lotus 123 Help on importing the data into Microsoft Excel is provided in section 11 8 and the excel txt file in the folder where you installed the WinTPS program 11 5 Commands The following commands can be sent from a PC to the 90 FLMV Note that cr denotes carriage return and 1f denotes a line feed Action Command Notes Request current data D cr Returns the current data of all parameters plus date and time from the 90 FLMV The log number returned is set to Zero Request logged data R cr Ret
30. Text Import Wizard select Fixed width as per the sample screen below then press Next gt Note that the data column headers in row appear only when the data is downloaded using the WinTPS software Text Import Wizard Step 1 of 3 Laa Fa Fi 5 ra H E a Continued over the page 51 5 Step 2 of the Text Import Wizard allows you to select the points at which each data field will break into a new column The sample screens below show where TPS recommends the breaks be inserted There are two screens as the width of the data requires the window to be scrolled over The date and time have been incorporated into a single column to ensure that the X axis is correctly formatted if the data is to be charted later Press Next gt after all the column breaks have been inserted Text Import Wizard Step 2 of 3 NX This screen lets you set field widths column breaks Lines with arrows signify a column break To CREATE a break line click at the desired position To DELETE a break line double click on the line To MOYE a break line click and drag it Data preview 10 20 30 40 50 Date 31 12 2001 12 00 00 31 12 2001 12 30 00 31 12 2001 13 00 00 3171272001 13 30 00 j me Text Import Wizard Step 2 of 3 21x This screen lets you set field widths column breaks Lines with arrows signify a column break To CREATE a break line click at the desired posi
31. The decimal point is available Press to record the B data item or press E to quit Quitting at this point records a Zero as the B data item 4 Repeat steps 1 to 3 as often as required The Pond number will automatically increment by one from the last recorded reading The maximum number of readings that can be stored in the Logger with this A amp B Data Input setting is 5950 39 10 2 4 When A is set to Data with no B data 1 Press in normal display mode The display should now look like this 2 Press to record all parameters plus Date and Time into the Logger memory This will be labelled as reading number 1 Alternatively press 2 to quit without recording the reading 3 The 90 FLMV now proceeds to the A data entry screen Use the numeric keypad to key in up to four characters for the A data item The decimal point is available Press to record the A data item or press to quit Quitting at this point records a Zero as the A data item 4 Repeat steps 1 to 3 as often as required The maximum number of readings that can be stored in the Logger with this A amp B Data Input setting is 5950 10 2 5 When A and B are both set to Data 1 Press in normal display mode The display should now look like this 2 Press to record all parameters plus Date and Time into the Logger memory This will be labelled as reading number 1 Alternatively press V7 to quit without recording the reading
32. V Fax 07 3808 4871 Dissolved Oxygen International 61 7 3808 4871 E mail tps tps com au Web Site Www tps com au Conductivity TDS pH mV Temperature Logger Date 20 Mar 2008 Version 7 2 Contents 1 LT IntroductiON Dean E E 4 1 1 90 FLMV Display and Controls cci ite einen nns iiini eiia 4 1 2 90 ELMV Rear Panel Connectors neret eer nee ied t ete eit der beet ate edili aeta ESEE RTE 4 1 3 Menu and Function Keys e nni tenete RO ep Feb iere el ddr cedro Eb ape cried 5 1 4 One touch Keys ihe e e tere A tocar eee dS era PME a SERRA 5 1 5 INUMETIC KEYS m 5 1 6 Delete 5 1 7 ON and OFF KEYS m 5 1 8 80 Character Display dinar ada 5 1 9 Unpacking Information MAA A A AA 6 1 10 Specifications eite rere rete riera 7 2 90 FLMV Menu Structure neeeseeseeie esses iaaa rr 11 3 Dissolved Oxygen Mode issia aana Lenc chiede a ARS inu in cu adeo ds 12 3 1 Selecting Dissolved Oxygen Mode eese enne nre anna 12 3 2 Dissolved Oxygen Calibration 13 eret rede eite tee Pete teinte niteat ea ED E HL TR e SE kde aie de 12 3 3 Dissolved Oxygen Calibration Notes sese nennen entren 15 3 4 Dissolved Oxygen Calibration Messages seen een rennen nennen nennen nennen 15 3 5 Dissolved Oxygen Stier imita
33. V distributes the number of readings evenly throughout a 24 hour clock cycle regardless of what time automatic logging is started and stopped For example if the 90 FLMV is programmed to log 4 readings per day they will be logged at 24 00 6 00 12 00 and 18 00 o clock Starting and Stopping Rate per Day Datalogging Starting Rate per Day datalogging is a two step process 1 Select the Logger menu E gt F3 Logger Select F4 Start from the menu Switch the 90 FLMV OFF This step is essential as the Rate per Day datalogging is only enabled when the 90 FLMV is switched OFF Stopping Rate per Day datalogging is a one step process 1 Select the Logger menu e gt F3 Logger Select F4 Stop from the menu Notes 1 The 90 FLMV remains dormant between readings and only switches itself ON when a reading is due 2 Ifthe Dissolved Oxygen stirrer is enabled it is switched on for 40 seconds before the reading is recorded 3 The 90 FLMV is switched on 3 minutes before the next reading is due to ensure that the Dissolved Oxygen sensor is fully polarised The unit will therefore not automatically log any readings for at least 3 minutes after it has been switched OFF even if a reading is due during that time 42 10 3 2 Time of Day Datalogging Programming Time of Day Datalogging 1 Select the Logger Program menu e gt F3 Logger F5 Program 2 Select F2 Time of Day from the menu The display should now look si
34. account
35. ar beliefs The partial pressure and consequently the pressure defined Saturation varies only slightly with temperature Recall at this stage that the permeability of the membrane has a temperature coefficient but the electronics has scaled this out by the operation of the Automatic Membrane Temperature Compensator Thermistor incorporated in the D O probe If mass units are used for measurement of Dissolved Oxygen the temperature problem of relating the linear partial pressure reading of the probe to the mass ppM or mg L at different temperatures becomes more involved As well there is the mass variation due to dissolved salts salinity correction Therefore the fully corrected instrument would need 3 correction systems a Membrane correction for temperature permeability effects b Solubility correction of Dissolved Oxygen with temperature and c Salinity correction of Dissolved Oxygen by weight Salinity has no effect on pressure units readout In the 90 FLMV instrument a Membrane correction is achieved AUTOMATICALLY b To provide the mass units ppM readout so popular due to the Winkler process used in the past the 90 FLMV Meter has Solubility Correction via an additional temperature sensor in the electrode c Salinity correction is performed automatically via the Conductivity TDS sensor 63 18 1 6 Equilibrium Conditions Whilst Saline Water has a lower ppM than does Fresh Water it does not mean it ne
36. ate and Time into the Logger memory This will be labelled as reading number 1 Alternatively press 7 to quit without recording the reading Repeat steps 1 amp 2 as often as required The maximum number of readings that can be stored in the Logger with the A amp B Data Input function switched OFF is 7230 38 10 2 2 When A is set to Pond with no extra B data 1 Press in normal display mode The display should now look like this 2 Use the numeric keypad to key in the Pond number then press to record all parameters Date Time and the Pond number into the Logger memory This will be labelled as reading number 1 Alternatively press to quit without recording the reading 3 Repeat steps 1 amp 2 as often as required The Pond number will automatically increment by one from the last recorded reading The maximum number of readings that can be stored in the Logger with this A amp B Data Input setting is 5950 10 2 3 When A is set to Pond and B is set to data 1 Press in normal display mode The display should now look like this 2 Use the numeric keypad to key in the Pond number then press to record all parameters Date Time and the Pond number into the Logger memory This will be labelled as reading number 1 Alternatively press 2 to quit without recording the reading 3 The 90 FLMV now proceeds to the B data entry screen Use the numeric keypad to key in up to four characters for the B data item
37. attery Saver sess Auto switch off after 5 minutes or 1 hour Battery saver can be switched off to allow continuous use Dimensions ee 230 x 140 x 100 mm Y cia grranah Suh an a on eaehstehe Instrument only Approx 1 5 kg Full Kit Approx 5 0 kg Environment seee Temperature 0to 45 C Humidity 0 to 90 R H 2 90 FLMV Menu Structure 11 A detailed breakdown of the menu system of the 90 FEMV is shown below This diagram provides a quick reference for the menu functions available for the 90 FLMV en gt Fl Calibrate gt Fl Oxygen F2 Conductivity or F2 TDS F3 pH F4 Temperature gt F2 Mode Fl Oxygen F3 Logger F3 Conductivity F4 TDS F1 Recall or F2 Erase F3 Print Log F4 Start F4 Stop F5 Program gt F4 Setup F1 Standards F2 GLP F3 Set AB F4 k factor F5 System F1 Bat Saver Or F2 Set Clock F3 Baud Rate F4 Stirrer Enable F4 Stirrer Disable This function not available when a TPS k 10 sensor is connected Fl ppm F2 ppM Sal F3 Sat F4 Gas Fl Erase All F2 Erase Last F1 Rate per Day F2 Time of Day F3 Sampling Period and Duration F1 Conductivity F2 TDS F3 pH Buffers
38. bration information is retained in memory when the 90 FLMV is switched off This information can be recalled or printed later using the GLP function see section 9 5 The 90 FLMV displays the value of the standard to which it will attempt to calibrate Ensure that the standard value displayed corresponds to the standard that you are using Alter the Standards set up if necessary see section 4 2 6 Calibration settings for k 0 1 k 1 and k 10 sensors are NOT stored separately The 90 FLMV requires re calibration when a new k factor sensor is connected 4 6 Conductivity Calibration Messages 1 Ifa Zero Calibration has been successfully performed the 90 FLMV will display the following message 2 If a Standard Calibration has been successfully performed the 90 FLMV will display the following message and the calculated k factor of the sensor For example 3 Ifa Standard Calibration has failed the 90 FLMV will display the following message and the calculated k factor of the sensor For example Notes 1 The allowable k factor range is 25 of nominal This range is ample to allow for correctly functioning Conductivity sensors If calibration fails due to the k factor being outside these limits then please consult the Troubleshooting guide section 17 3 for possible remedies 21 5 TDS Mode 5 1 Selecting TDS Mode 1 Select TDS Mode gt F2 Mode gt F4 TDS 2 The 90 FLMV now proceeds to TDS measurement mode Note that a
39. cessarily has less biologically available oxygen Both have 100 Saturation presuming no Chemical Oxygen Demand C O D Biological Oxygen Demand B O D etc because both are in partial pressure equilibrium with air Any usage of oxygen is immediately replenished by the dissolving of more from air to meet partial pressure equilibrium requirements This is so for both saline and fresh water The reporting of oxygen at a lower level in ppM units in the Salt Water is therefore QUITE MISLEADING In closed systems such as tanks pipes and deep waters equilibrium is not so readily available and the Salinity Effect gains the importance in the reporting of Dissolved Oxygen It is suggested unless such closed or deep low diffusion systems are encountered that Oxygen should be reported in Saturation or ppM of equivalent Fresh Water 18 1 7 Velocity Past The Membrane Workers have shown that the relationship between the diffusion current oxygen current and the external velocity of the liquid is expotential Some workers using thicker membranes have shown even less dependence of the diffusion current on liquid velocity Because of the expotential nature of the relationship considerable changes in velocity have to be made before noticing any change in the diffusing current once the flow is sufficiently high Tests with this electrode have shown that flow rates above 0 2 litres minute past the membrane give results indistinguishable from those with
40. ct the charger and switch the power on Display the battery volts in the battery saver menu see section 15 If the battery volts are increasing then the charger is OK If the battery volts do not increase then the charger is faulty Replace the charger or the battery as required 17 2 Dissolved Oxygen Troubleshooting Unit fails to calibrate even Calibration settings outside of Initialise the unit See section 13 with new sensor allowable limits due to previous failed calibration e Zero calibration fails 1 Membrane is leaking or Replace membrane and refill electrode Zero is greater than broken 7 096 Gap between membrane and Gently pump the pressure compensation e Air calibration fails Span gold cathode is dry diaphragm several times is less than 65 or greater Incorrectly fitted membrane Membrane should be smooth and convex than 200 with no wrinkles Re fit membrane if e Unstable or inaccurate necessary readings 4 Electrode is empty Replace membrane and re fill electrode Electrode is faulty Return electrode to factory for repair or replacement Blackened Silver anode Electrode has been exposed to Remove pressure compensation diaphragm sulphides or other chemical and membrane then soak in 5 Ammonia poisoning solution for 10 minutes If cleaning is unsuccessful return the sensor to the TPS factory for cleaning and service Tarnished or scratched Gold Electrode has been ch
41. d by a PC with the D or R commands section 11 5 the data is terminated with a carriage return 3 When the data is sent by the 90 FLMV using the Print function section 10 6 or the Instant Send function section 11 2 the data ends with a carriage return and a line feed 11 7 GLP Data Format GLP information is returned as 12 lines terminated by a carriage return When using the G command section 11 5 the computer must respond with a character after receiving each line For example 90FLMV V6 0 S1234 31 12 2000 12 00 Oxygen Zero 0 1 31 12 2000 12 00 Oxygen Span 100 0 31 12 2000 12 10 Conductivity Zero 0 01uS 31 12 2000 12 20 Conductivity k 1 01 Q 31 12 2000 12 30 TDS Zero 0 01ppM Q 31 12 2000 12 40 TDS k 1 01 31 12 2000 12 50 pH Asy 0 10pH 31 12 2000 13 20 pH Slope 99 0 31 12 2000 13 30 Temperature Offset 1 00C 31 12 2000 14 20 Temperature Span 100 0 31 12 2000 14 30 Ends 50 11 8 Importing Data into Microsoft Excel The following procedure details the method for importing a 90 FLMV text data file into Microsoft Excel 1 Start Microsoft Excel and select File gt Open 2 In the Files of type pull down box choose Text Files prn txt csv 3 Navigate to the folder where your data file is stored and double click it to start the Text Import Wizard Note The default data folder for the WinTPS software is CAMy Documents WinTPS 4 Instep 1 of the
42. d rinse well with distilled water Conductivity sensors can be stored dry Ensure that the sensor is stored in a covered container to avoid dust and dirt build up Cleaning of Conductivity Sensors Platinised platinum Conductivity sensors can only be cleaned by rinsing in a suitable solvent DO NOT wipe the electrode plates as this will remove the platinum black layer l Za Rinsing in distilled water will remove most build ups of material on the electrode plates Films of oils or fats on the electrode plates can usually be removed by rinsing the sensor in methylated spirits Stubborn contamination can be removed by soaking the sensor in a solution of 1 part Concentrated HCl and 10 parts distilled water The sensor should not be soaked for more than approximately 3 minutes otherwise the platinum black layer may start to dissolve If all of these methods fail then the last resort is to physically scrub the electrode plates which will remove the contaminant and the layer of platinum black Use only a cloth or nylon scouring pad DO NOT USE STEEL WOOL The sensor will then need to be cleaned in HCI as per step 3 and replatinised see detail later in this section 65 Replatinising Conductivity Sensors There are several ways to replatinise Conductivity electrodes 1 The simplest way is to return the electrode to the TPS factory We can fully clean the electrode replatinise it and test all aspects of its performance 2 An a
43. d the Zero value of the sensor If a Zero calibration has failed the 90 FLMV will display the following message and the failed Zero value of the sensor The unit will return to normal display mode with a in place of the decimal point in the Dissolved Oxygen reading If an Air Span calibration has been successfully performed the 90 FLMV will display the following message and the Span value of the sensor If an Air Span calibration has failed the 90 FLMV will display the following message and the failed Span value of the sensor The decimal point will be replaced by a when the unit returns to normal display mode The allowable Span range for a Dissolved Oxygen sensor is 65 0 to 200 0 If calibration fails due to the Span value being outside these limits then please consult the Troubleshooting guide section 17 2 for possible remedies 16 3 5 Dissolved Oxygen Stirrer The 90 FLMV is equipped with a 4 5V DC output to power a stirrer for the Dissolved Oxygen sensor This power output is suitable for the TPS submersible DO stirrer part number 123306 3 5 1 Enabling and Disabling the Dissolved Oxygen stirrer output 1 Select the System menu e gt F5 System 2 SelectF4 Stirrer Enable orF4 Stirrer Disable from the menu as required 3 5 2 Connecting the Dissolved Oxygen stirrer To connect the Dissolved Oxygen stirrer 1 Plug the Dissolved Oxygen stirrer into the Oxygen socket on the meter 2 P
44. e of Day automatic datalogging see sections 10 3 1 and 10 3 2 The meter must then be powered down with the OFF key or with the K command see below Disable Rate per Day or Time F lt cr gt Stops automatic datalogging when the 90 FLMV is set up for of Day automatic datalogging Rate per Day or Time of Day automatic datalogging see sections 10 3 1 and 10 3 2 Power ON Any 10 Switches the 90 FLMV ON characters A specific command is not available while the 90 FLMV is off so RS232 activity caused by the 10 characters switches the unit ON Power OFF K lt cr gt Switches the 90 FLMV OFF Use the command after the G command above to actually start rate per Day or Time of Day automatic datalogging Turn Dissolved Oxygen stirrer 2M lt cr gt Starts the Dissolved Oxygen stirrer to run continuously until ON stopped The stirrer output must be enabled see section 3 5 1 Turn Dissolved Oxygen stirrer 2N lt cr gt Stops the Dissolved Oxygen stirrer OFF Request battery volts Y V lt cr gt Returns the current voltage level in the battery pack for example 7 20V lt cr gt Positions of Data Fields P lt cr gt Returns the number of data fields along with their position and length When the A amp B Data Input function is disabled 8 1 10 12 8 21 4 26 5 35 7 46 5 54 5 62 5 This denotes 8 fields the first of which is at column 1 and is 10 characters long The second field is at column 12 and is 8 characters long and so on When the A a
45. e operator to enter extra numerical data whenever datalogging manually The A amp B Data Input function can also be set for any one of the following A as Pond number with no extra B data input A as Pond number with extra B data input A as data input with no extra B data input A and B both as data input A amp B Data Input Function switched OFF The Logger memory must be erased before changing the A amp Data Input setting To set the A amp B Data Input function 1 3 Select the A amp B setup menu e gt F4 Setup gt F3 Set AB The 90 FLMV will prompt you to erase the Logger before proceeding if any data is stored in memory The arrow indicates the current selection Press to set A as Pond number with no extra B data input Press 2 to set A as Pond number with extra B data input Press to set A as data input with no extra B data input Press Y to set A and B both as data input Press 9 to switch the A amp B Data Input function OFF Press V7 to quit and retain the current setting The A amp B Data Input function is now set and is ready for use during Manual Datalogging 10 2 Manually Recording Readings into the Logger 10 2 1 When A amp B Data Input has been set to OFF l Press in normal display mode The display should now look like this Press to record all parameters plus D
46. eben Da HE Debe ebd i eii seite reae ce 16 4 CONAUCUVIEY erc 17 4 1 selecting Conductivity Mode nete tr rt hate pe oye Ik oe Edu ataj lle ended 17 4 2 Setting the Conductivity calibration standard eeeeeeeenen nennen 17 4 3 Setting the Conductivity sensor k factor nennen nennen nennen 18 4 4 Conductivity Calibration eot Pe deis Pasch esca aab tee eo egli abs 19 4 5 Conductivity Calibration Notes sees enne enr rn rennen nennen nne 20 4 6 Conductivity Calibration Messages eese ener enne enne 20 Ds TDS MOG E 21 5 1 selecting TDS Mode deo eei lia Eco eu edere a L o pk ida 21 5 2 Setting the TDS calibration standard essere nennen nenne 21 5 3 setting the TDS sensor k factor eie eere nre eret rene Hr Ire eda e rabia abd ena aede 22 5 4 TDS Calibration erret tee rero eie titt Pri PERSE APO ERE ESAE TU ANDR ERTAH RENE SD MR a Ren 23 5 5 TDS Calibration Not Seere it re re eere bere be pese Re e said cc 24 5 6 TDS Calibration Messages ricette sic eL ette see eee a eh eee koh ede acera eC eod e hands beoe beo dei dde 24 6 PH e e 25 6 1 Selecting the pH Buffer etica et te ra dee er redire ee ie Pe Ot E Creare a ded c 25 6 2 pH erlilscitu m 26 6 3 pH Calibration Notes ir ente eset ret de e eee agr eere iia tas 27 6 4 pH Calibration Mess
47. emically Return to the TPS factory for cleaning and cathode poisoned or physically damaged service Dissolved Oxygen reading Conductivity TDS reading is in Dissolved Oxygen readings are still valid flashes in ppM mode excess of 82mS cm or 5OppK and accurate but no longer salinity compensated as the Conductivity TDS has exceeded the limit for accurate calculations Meter displays OVR ppM 1 Electrode has not Wait for 2 3 minutes for the electrode to or OVR instead of polarised polarise after the 90 FLMV is switched on Dissolved Oxygen data 2 Electrode is faulty Return electrode to factory for repair or replacement 57 58 17 3 Conductivity TDS Troubleshooting Unit fails to calibrate even with new probe Unit attempts Span calibration instead of Zero calibration Standard calibration fails and k factor is greater than 25 above the nominal value Standard calibration fails and k factor is greater than 25 below the nominal value Inaccurate readings even when calibration is successful Calibration settings outside of allowable limits due to previous failed calibration Sensor has Zero error Sensor is not immersed correctly Sensor may have a build up of dirt or oily material on electrode plates Platinum black coating has worn off Standard solution inaccurate Sensor is faulty Faulty instrument Standard solution inaccurate Sensor may have a build up
48. emperature sensor is replaced or the meter is initialised Calibration Messages If a 1 point temperature calibration has been successfully performed the 90 FLMV will display the following message and the offset value of the sensor The bottom line appears after 3 seconds If a 1 point temperature calibration has failed the 90 FLMV will display the following message and the failed offset value of the sensor The 90 FLMV has an allowable Offset range of 15 0 to 15 0 C If calibration fails due to the Offset being outside these limits then please consult the Troubleshooting guide section 17 5 for possible remedies If a 2 point temperature calibration has been successfully performed the 90 FLMV will display the following message and the span value of the sensor If a 2 point temperature calibration has failed the 90 FLMV will display the following message and the failed span value of the sensor The 90 FLMV has an allowable span range of 93 0 to 107 0 If calibration fails due to the Span being outside these limits then please consult the Troubleshooting guide section 17 5 for possible remedies 32 8 4 Manual Temperature Setting If a Conductivity TDS or Temperature sensor is not connected the temperature of the sample solution must be set manually for accurate ppM Dissolved Oxygen or pH measurements A separate thermometer will be required for this Temperature compensation is not applicable for Millivolt mode
49. emperature readout sensor is limited to 60 6G Sensor PE dae Silicon transistor built into tip of Conductivity TDS sensor or separate Temperature sensor if Conductivity TDS sensor is not in use CalnbradOn eco a ais Automatic offset and span calibration Sensor Offset Range 15 0 to 15 0 9C Sensor Span Range 93 to 107 96 10 1 10 7 General Specifications MO A secies i 7230 readings including date and time with A amp B function disabled 5950 readings including date and time with A amp B function enabled Automatic Logging Rate per Day to 288 readings per day Time of Day to 12 discrete times of the day in 24 hour format Sampling Period and Duration One reading every 1 to 300 seconds for a duration of 1 to 720 minutes or continuous RS232 Port nes 300 9600 amp 19200 baud 8 bits no parity 1 stop bit XON XOFF Protocol Clock RW ens Calendar clock displays date month hours minutes amp seconds Year is Y2K compliant and is attached to all stored data Good Laboratory Practices Date time and results of last calibration for all parameters are stored This information can be recalled or sent to the RS232 port at any time POWER 6 o ete eher ds cd 7 2V 1300mAH NiCad battery built in Battery charger for country of destination is included Solar panel and external battery clip lead optionally available B
50. ependent of the flow a few cm sec is sufficient The cell must not be shaken however or unstable readings will result from electrolyte surge bringing new oxygen from the reservoir to the working cathode surface 18 1 2 Operating Principle The Clark oxygen electrode consists of a gold cathode and a silver silver chloride anode placed in an electrolyte solution This solution is contained behind a plastic membrane In this case the plastic is 0 001 inch PTFE Teflon sheet It must be realised that using membranes of very different thicknesses will result in an error in the temperature compensation that is applied in the instrument for the membrane permeability This coefficient is 4 2 C at 25 C for this thickness membrane A polarising voltage of about 800 millivolts is applied between the two electrodes The gold electrode is placed close to the membrane and because of the polarising voltage oxygen diffusing through the membrane will be reduced at the gold electrode Equation O 2H 2electrons gt HO This reduction process will produce a current through the oxygen electrode A load resistor actually a thermistor in this case situated in the electrode itself converts this current into a voltage proportional to the oxygen partial pressure The thermistor provided within the body of the electrode has a temperature coefficient of 4 2 C This gives an accurate temperature compensation for the temperature permeability effect of the
51. ibrated The 90 FLMV is able to take Temperature readings from the Conductivity TDS sensor or a separate Temperature probe Only one or the other can be connected at any one time Ensure that the 90 FLMV has been calibrated on the correct sensor 8 1 Temperature Calibration 1 Plug Conductivity TDS or separate Temperature sensor into the Cond Sal socket 2 Switch the meter on 3 Place the sensor into a beaker of room temperature water alongside a good quality mercury thermometer Stir the sensor and the thermometer gently to ensure an even temperature throughout the beaker 4 Select Temperature Calibration e gt Fl Calibrate gt F4 Temperature The Temperature Calibration screen is now displayed 5 Thecurrent reading from the sensor is displayed on the far right of the top line When this reading has stabilised use the Numeric Keypad to enter the same temperature as measured by the mercury thermometer 6 Press the key to calibrate the temperature readout Alternatively press the V7 key to abort temperature calibration The 90 FLMV is now 1 point temperature calibrated This will provide precision to approximately 0 5 C The following screen is displayed Press if 0 5 C is adequate for your application The 90 FLMV will now return to normal measurement mode and the in the Temperature readout will have been replaced by a decimal point Press to go on to a second point calibration if a higher degree
52. ing Period and Duration datalogging is a two step process 1 Press 92 in normal measurement mode 2 The 90 FLMV now prompts you to press to begin logging For example The time is shown to enable the user to synchronise the sampling times if required 4 Press to start logging To stop logging before the end of the duration press E Notes 1 The 90 FLMV remains switched on continuously for Sampling Period and Duration datalogging 2 If the Dissolved Oxygen stirrer is enabled it is switched on continuously for Sampling Period and Duration datalogging 44 10 4 Recalling Readings from the Logger To recall records from the Logger onto the 90 FLMV display 1 Select the Logger menu e gt F3 Logger 2 Select F1 Recall from the menu Record number 1 is now displayed The following example shows the display when the A amp B Data Input function was switched off during logging The following example shows the display when A and B were both set to data during logging 3 Press 2 to display the next record Press Y to display the previous record Press and hold or to scroll continuously through the readings To display a specific record type in the desired record number using the Numeric Keypad and press Enter Press to send the displayed record to the RS232 port 45 10 5 Erasing Records from the Logger To erase records from the Logger 1 2 Select the Erase Logger
53. ing between Conductivity and TDS modes providing the instrument has been correctly calibrated for each mode on the k factor sensor to be used 4 All calibration information is retained in memory when the 90 FLMV is switched off This information can be recalled or printed later using the GLP function see section 9 5 The 90 FLMV displays the value of the standard to which it will attempt to calibrate Ensure that the standard value displayed corresponds to the standard that you are using Alter the Standards set up if necessary see section 5 2 6 Calibration settings for k 0 1 k 1 and k 10 sensors are NOT stored separately The 90 FLMV requires re calibration when a new k factor sensor is connected 5 6 TDS Calibration Messages 1 Ifa Zero Calibration has been successfully performed the 90 FLMV will display the following message 2 If a Standard Calibration has been successfully performed the 90 FLMV will display the following message and the calculated k factor of the sensor For example 3 Ifa Standard Calibration has failed the 90 FLMV will display the following message and the calculated k factor of the sensor For example Notes 2 The allowable k factor range is 25 of nominal This range is ample to allow for correctly functioning TDS sensors If calibration fails due to the k factor being outside these limits then please consult the Troubleshooting guide section 17 3 for possible remedies 25 6 pH Mode
54. ional However if the solubility of oxygen in the liquid should change owing to increased quantities of solutes etc then the ratio of the Concentration to the Partial Pressure must change Thus if one saturates distilled water and a 25 solution of Sodium Chloride with air at atmospheric pressure 25 C both solutions will have almost exactly the same Oxygen Partial Pressure namely 15 5 cm of mercury However the dissolved Oxygen Concentration parts per million milligrams per litre will be 8 2 in the distilled water and 2 01 in the salt solution This is a rather extreme example as ocean water is only 3 6 saline It does however stress the importance of correct interpretation of the salinity The Clark Electrode measures the partial pressure of oxygen diffusing through a membrane The current is a linear measure of this partial pressure assuming sufficient liquid flow conditions With air at sea level the 20 9 oxygen exerts about 15 5 cm of Mercury pressure Water in equilibrium with air and with no oxygen demand C O D B O D etc is saturated and has this dissolved oxygen partial pressure If we define 100 Saturation in Partial Pressure terms then 15 5 cm Hg 100 Saturation This is a practical unit to use The probe linear readout is then a linear function of Saturation Organic cell walls behave like the probe and pressure units are valuable Saturation is the best unit for industrial control and not ppM contrary to popul
55. irring generally improves stability DO NOT place the electrodes directly into the buffer bottle pH Temperature RY IK Conductivity TDS Select pH calibration e gt F1 Calibrate gt F3 pH The display should now look something like this The current pH reading is shown on the left Note the indicating that pH is currently not calibrated Wait for this reading to stabilise before attempting to calibrate the 90 FLMV The buffer that the 90 FLMV has attempted to recognise is also displayed with the correct value at the current temperature Press to calibrate to the displayed buffer Otherwise enter an alternative buffer using the Numeric Keypad and then press Enter The meter is now 1 point calibrated Note that the will not be removed until a full 2 point calibration has been performed 10 27 Rinse the pH and Conductivity TDS or Temperature sensors in distilled water and blot them dry Place both sensors into a small sample of secondary buffer pH4 00 9 23 or 10 06 so that the bulb and reference junction are both covered as per the diagram in step 5 DO NOT place the electrodes directly into the buffer bottle NOTE pH9 23 and pH10 06 buffers are highly unstable Avoid using these buffers if possible Discard immediately after use Select pH calibration E gt Fl Calibrate gt F3 pH The display should now look similar to the example sh
56. l display the following message and the failed asymmetry value of the electrode If a 2 point calibration has been successfully performed the 90 FLMV will display the following message and the asymmetry and slope of the electrode If a 2 point calibration has failed the 90 FLMV will display the following message and the failed slope value of the electrode The 90 FLMV has an allowable Asymmetry range of 1 00 to 1 00 pH The allowable Slope range is 85 0 to 105 0 If calibration fails due to either the Asymmetry or the Slope being outside these limits then please consult the Troubleshooting guide section 17 4 for possible remedies 29 7 Millivolt Mode 7 1 Millivolt Measurements The millivolt section of the 90 FLMV is factory calibrated There is no user calibration facility for this mode Temperature compensation is not applicable in Millivolt mode Simply plug the Redox sensor into the mV socket Ensure that the platinum tip and reference junction are both covered as per the diagram below x o 0 c o o a c O x A narrow E calibration o vessel a reduces sample consumption The Platinum Tip must be kept clean at all times 30 8 Temperature Mode The temperature readout must be calibrated before attempting pH or ppM Dissolved Oxygen calibration and measurements The decimal point is replaced by a if the reading is not cal
57. lug the Dissolved Oxygen sensor into the in line socket that is provided on the stirrer cable 8 Se To Dissolved Oxygen Sensor Please refer to the diagram below O E Dissolved Oxygen Sensor and Stirrer connector To stirrer 3 5 3 Starting and Stopping the Dissolved Oxygen stirrer 1 Ensure that the Dissolved Oxygen stirrer output has been enabled as per section 3 5 1 2 Press once in normal display mode to start the stirrer The stirrer will stay on for 40 seconds and then stop A countdown is provided on the screen 3 Press a second time any time during the 40 second period to set the Dissolved Oxygen stirrer to operate continuously 4 Press a third time to stop the Dissolved Oxygen stirrer The Dissolved Oxygen stirrer starts and stops automatically when the 90 FLMV is in Rate per Day or Time of Day automatic datalogging mode See sections 10 3 1 and 10 3 2 17 4 Conductivity Mode 4 1 Selecting Conductivity Mode 1 Select Conductivity Mode gt F2 Mode gt F3 Conductivity 2 The 90 FLMV now proceeds to Conductivity measurement mode Note that a is shown in place of the decimal point until a successful calibration has been performed see section 4 4 4 2 Setting the Conductivity calibration standard The factory default for this item is 2 76mS cm If this is satisfactory go directly to section 4 3 1 Select the Conductivity Standard entry gt F4 Setu
58. membrane over a range of about 5 to 45 C about a centre value of 25 C Note this compensation is not for the solubility effects A separate sensor also built into the tip of the probe achieves this 18 1 3 Probe Storage The Oxygen probe should be kept moist when not in use to prevent the thin film of electrolyte behind the membrane from drying out To achieve this the probe can be stored with the tip in water or in a humid environment For long term storage of several weeks or more remove the membrane and empty out the electrolyte Replace the membrane without electrolyte to avoid contamination of the gold and silver surfaces When the electrode is stored in this way the membrane should be replaced and the electrode refilled before use 62 18 1 4 Maintenance Of The Membrane The membrane does not require replacement as long as it remains intact If punctured or suspected of leaking around the edges it must be replaced To replace the membrane please see the separate instruction leaflet supplied with your sensor 18 1 5 Notes On Units Of Dissolved Oxygen The terms Oxygen Concentration and Oxygen Partial Pressure frequently give rise to some confusion e Oxygen Concentration is the absolute quantity of oxygen present per unit mass of the liquid e Oxygen Partial Pressure is the oxygen fraction of the total pressure of all of the gases present For any one liquid system Oxygen Concentration and Oxygen Partial Pressure are proport
59. milar to that shown below Any currently programmed times are displayed 3 Use the Numeric Keypad to set the first time of the day at which the 90 FLMV will automatically log into memory 4 Press to move to the next time of the day Repeat steps 7 and 8 to enter up to 12 times of the day The times do not need to be evenly spread throughout the day Times must be entered in 24 hour clock format Press Y to save the programmed times of the day and quit 7 The Time of Day datalogging is now programmed and can be started and stopped as required Notes 1 For 12 00 o clock midnight enter the time as 24 00 2 The times of the day do not need to be entered in chronological order The 90 FLMV will sort them after pressing Starting and Stopping Time of Day Datalogging Starting Time of Day datalogging is a two step process 1 Select the Logger menu E gt F3 Logger Select FA Start from the menu 2 Switch the 90 FLMV OFF This step is essential as the Time of Day datalogging is only enabled when the 90 FLMV is switched OFF Stopping Time of Day datalogging is a one step process 1 Select the Logger menu e F3 Logger Select F4 Stop from the menu Notes 1 The 90 FLMV remains dormant between readings and only switches itself ON when a reading is due 2 If the Dissolved Oxygen stirrer is enabled it is switched on for 40 seconds before the reading is recorded 3 The 90 FLMV is switched on
60. mp B Data Input function is enabled 10 1 10 12 8 21 4 26 5 35 7 46 5 54 5 62 5 70 4 76 4 Data Column Header H cr Returns a text string which can be used to provide headers for each data field Spaces are included to ensure that the headers are correctly aligned with the data 48 11 6 Data Format Data is returned to the RS232 Port by the 90 FEMV in the following format Please note that a e shown anywhere in this section denotes one space dd mm yyyy hh mm sseLLLLeDDDDDuuueCCCCCCCuuu PPPPPuu MMMMMuu e TTTTTuuLaaaaA bbbbB where dd mm yyyy hh mm ss LLLL DDDDD uuu CCCCCCC uuu PPPPP uu uu TTTTT uu is the date month and year data is the hours minutes and seconds data is the Log Number 4 characters right justified The 90 FLMV sends a Zero for instant readings see section 11 2 is Dissolved Oxygen data 5 characters right justified is the Dissolved Oxygen units description which can be any of the following ppm for parts per Million readout without Salinity correction Note the lower case m PPM for parts per Million readout with Salinity correction applied Note the upper case M SSe for Saturation readout Ge for Gaseous readout is Conductivity or TDS data 7 characters right justified is the Conductivity TDS units description which can be either of the following uSe for uS cm Conductivity readout
61. n The 90 FLMV is now calibrated and is ready for Dissolved Oxygen measurements Rinse the Dissolved Oxygen sensor in distilled water and blot dry before placing it into unknown samples 14 3 2 3 Span Calibration in Solution Salinity corrected ppM Mode only This span calibration provides an alternative to calibrating the Dissolved Oxygen sensor in air It is only available when the 90 FLMV is in Salinity corrected ppM mode Please note that the normal AIR calibration section 3 2 2 1s still available for Salinity corrected ppM mode 1 Measure the Dissolved Oxygen content of the solution to be used for calibration This is generally done with a Winkler titration The 90 FLMV span calibration should be performed immediately the Dissolved Oxygen content of the solution is known as the value may not be stable 2 Place the Dissolved Oxygen and Conductivity TDS sensors into the calibration solution Ensure that the Conductivity TDS sensor is calibrated and is correctly immersed see sections 4 4 and 5 4 The solution must be stirred at a moderate rate Allow the reading to stabilise After a zero calibration this may take up to 5 minutes 3 Select Oxygen Calibration e gt Fl Calibrate gt F1 Oxygen When the reading is above approximately 2 ppM the 90 FLMV will display the AIR SPAN calibration screen Note the cursor underlining the A in Air Use the numeric keypad to enter the Dissolved Oxygen value of the solution The wo
62. nd 1 Faulty connector Check the connector and replace if cannot be calibrated necessary 2 Faulty Conductivity or Return Conductivity or Temperature sensor Temperature sensor for repair or replace sensor whichever is being used Displays manual Faulty instrument socket Return the instrument to the TPS factory for temperature setting eg service o 25 0 cM when Faulty Conductivity or Return Conductivity or Temperature sensor Conductivity or Temperature sensor for repair or replace sensor Temperature sensor plugged hich is bei d x whichever is being use NOTE Conductivity and TDS readings may still be accurate as there is a separate temperature sensor to provide ATC for these parameters built into the Conductivity TDS sensor 61 18 Appendices 18 1 Dissolved Oxygen 18 1 1 Dissolved Oxygen Sensor Fundamentals The electrode used is the amperometric type of Clark Electrode and is suitable for the measurement of oxygen pressures in the range O to 100 cm of mercury While the probe actually reads partial pressure of oxygen the circuit is calibrated to be read in percentage saturation or parts per million Milligrams litre The operation of the Clark type probe relies on the diffusion of oxygen through a suitable membrane into a constant environment of potassium chloride Solution measurements are best performed with a reasonable flow past the membrane At sufficiently high flow rates the oxygen current is totally ind
63. ng DO sensor for BOD bottles 123214 7 YSI Self stirring DO sensor for BOD bottles 123213 8 k 10 ATC Temp Conductivity Sensor 5m 122218 9 k 1 ATC Temp Conductivity Sensor 5m 122196 10 Submersible pH Sensor Gel Filled 5m 111224 11 Intermediate Junction pH Sensor 5m 111227 12 Submersible Redox Sensor Gel Filled 5m 111260 13 Intermediate Junction Redox Sensor 5m 121267 14 Temperature Sensor 5m sees 124210 not required when Conductivity sensor is in use Options 1 PVC Sensor holder assembly 5m s s cable 121343 2 Dissolved Oxygen stirrer 5m sss 123306 3 Extended cable for sensors order by the metre 130040 4 RS232 Serial Interface Cable ss 130015 5 Communication software for Windows 3 1 130086 95 08 and NT 6 Solar Panel v esse A eet 130012 7 Clip lead for external 12V DC battery 130013 8 Hard Carry case for meter and accessories 130058 Spares lu 2 NICad Battery Packe ii 130027 2 Membrane Filling Solution and Zero DO kit 123300 1 10 Specifications 1 10 1 Dissolved Oxygen Range Resolution Accuracy O to 320 0 Saturation 0 1 Saturation 0 3 Saturation Note Full scales are subject to sensor performance Sensor Type octe
64. nt between readings and wakes up when a reading is due Dissolved Oxygen stirrer is switched on for 40 seconds before each reading is logged if Dissolved Oxygen stirrer output is enabled Unit continues to log until automatic datalogging is disabled or until the memory is full 3 Sampling Period and Duration Logs a reading every 1 to 300 seconds for a duration of 1 to 720 minutes Duration can be set to log continuously until the memory is full Unit is turned on continuously in this logging mode Dissolved Oxygen stirrer is switched on continuously in this logging mode 1f Dissolved Oxygen stirrer output is enabled The automatic datalogging parameters of the 90 FLMV must first be programmed then logging can be started and stopped as required 41 10 3 1 Rate per Day Datalogging Programming Rate per Day Datalogging 1 Select the Logger Program menu e F3 Logger F5 Program 2 Select F1 Rate per Day from the menu The display should now look similar to that shown below The current Rate per Day is displayed 3 Use the Numeric Keypad to set the number of readings per day which the 90 FLMV will automatically log into memory This can be set from 1 to 288 ie 1 reading every 24 hours to reading every 5 minutes Press to save the Rate per Day Press Y to quit without changing the current setting 4 The Rate per Day datalogging is now programmed and can be started and stopped as required Notes 1 The 90 FLM
65. ot dry 3 2 1 Zero Calibration all Oxygen modes 1 Place the Dissolved Oxygen sensor into an oxygen free solution This solution may be prepared by dissolving 2g of Sodium Sulphite in 100mL of distilled water A 50g bottle of Sodium Sulphite powder part number 123302 is supplied with a new Dissolved Oxygen sensor or Membrane Kit for this purpose Allow the reading to stabilise at or near zero This may take 2 3 minutes Select Oxygen Calibration e gt F1 Calibrate gt F1 0xygen When the reading is below approximately 25 Saturation 2 ppM or 5 Gaseous the 90 FLMV will display the ZERO calibration screen Press to calibrate A x will not be removed from the display after a Zero Calibration Remove the sensor from the Zero solution rinse well in distilled water and blot dry The 90 FLMV will now prompt you to perform an AIR calibration 13 3 2 2 Span Calibration in Air all Oxygen modes 1 Hang the Dissolved Oxygen sensor in air The tip of the Dissolved Oxygen sensor should be pointing downwards Allow the reading to stabilise After a zero calibration this may take up to 5 minutes Select Oxygen Calibration E gt F1 Calibrate gt F1 Oxygen When the reading is above approximately 25 Saturation 2 ppM or 5 Gaseous the 90 FLMV will display the AIR calibration screen Press to calibrate A x in the display will be replaced by a decimal point after a successful air calibratio
66. own in step 6 Note that the 90 FLMV has automatically recognised the second buffer Wait for the displayed reading to stabilise before attempting to calibrate the 90 FLMV Press to calibrate to the displayed buffer Otherwise enter an alternative buffer using the Numeric Keypad and then press Enter The 90 FLMV is now pH calibrated and is ready for use in this mode Discard the used samples of buffer Rinse the pH and Conductivity TDS or Temperature sensors in distilled water and blot them dry before placing them into unknown samples 6 3 pH Calibration Notes 1 A 1 point calibration should be performed at least weekly In applications where the electrode junction can become blocked such as dairy products mining slurries etc a 1 point calibration may have to be done daily A full 2 point calibration should be performed at least monthly Of course more frequent calibration will result in greater confidence in results All calibration information is retained in memory when the 90 FLMV is switched off even when the power supply is removed This information can be recalled or printed later using the GLP function see section 9 28 6 4 pH Calibration Messages If a 1 point calibration has been successfully performed the 90 FLMV will display the following message and the asymmetry of the electrode Note that the slope value from the last calibration is also shown 1 If a 1 point calibration has failed the 90 FLMV wil
67. p gt Fl Standards gt F1 Conductivity The following screen is now displayed 2 Type in the value of the Conductivity standard that is to be used for calibration including the decimal point Use the e key to make any corrections 3 Press to save the value of the standard solution Alternatively press V7 to quit without changing the current setting 4 The 90 FLMV will now ask you to enter the units for the Conductivity standard Press to set the Conductivity Standard as uS cm Press to set the Conductivity Standard as mS cm 5 The Conductivity standard is now programmed for use at calibration 18 4 3 Setting the Conductivity sensor k factor The 90 FLMV automatically recognises a k 10 sensor If a k 10 sensor is being used go directly to section 4 4 The 90 FLMV does not automatically recognise k 0 1 or k 1 sensors When a k 0 1 or k 1 sensor is used the 90 FLMV must be set to the correct k factor before use To select a k 0 1 or k 1 sensor 1 Select k factor entry e gt F4 Setup gt F4 k factor 2 The k factor entry screen is now displayed The arrow indicates the current selection Press if a k 0 1 sensor is being used Press if a k 1 sensor is being used Press V7 to quit without changing the current setting Notes 1 The manual k factor selection is kept in memory when the meter is switched off 2 The manual k factor selection is reset to k 1 during initialisation
68. pt default values or those entered on the Numeric Keypad 1 5 Numeric Keys Used to enter values during set up and calibration A negative sign and decimal point are provided 1 6 Delete Key Press the O key to make corrections to values entered on the Numeric Keypad 1 7 ON and OFF Keys Press the relevant key to switch the 90 FLMV on and off as required 1 8 80 Character Display 80 character alphanumeric display with user friendly menu and context sensitive help system Shows Dissolved Oxygen Conductivity TDS pH mV Temperature Date and Time simultaneously 6 1 9 Unpacking Information Before using your new 90 FLMV please check that the following accessories have been included Part No Standard Kit 1 90 FLMYV Field Lab with mV readout 130018 2 pH6 88 Buffer 200 a 500i sas sissseasssediaesacassesiaateosaans 121306 3 pH4 00 Buffer 200 mL ais 121381 4 2 76 mS cm Conductivity Standard 1 Litre 122305 5 Plug Pack Power SUpplY ocoococconcccnoncccnonccnnnnccnonnss 130009 6 90 FLMV Handbook eee 130050 Sensors 1 YSI Field type DO sensor eee 123204 2 3m Cable for YSI Field DO sensor 123215 3 5m Cable for YSI Field DO sensor 123219 4 7 5m Cable for YSI Field DO sensor 123216 5 15m Cable for YSI Field DO sensor 123217 6 YSI Non stirri
69. r nne nennen etn rennen rennen nnns 59 1755 Temperature Troubleshooting 2 ere dias 60 18 Ann 61 18 1 Dissolved OXY Sei inet rto reae te at eee ede erue eet edo Adi 61 18 2 Conduictivity TDS cinco is Pea eie vae Ee dei dua 64 18 39 Psic lactancia sia 66 19 Ae A A E A A E A E E 70 4 1 Introduction 1 1 90 FLMV Display and Controls Carry Handle 80 Character Display Ww Wy Menu and ON and One touch Numeric Keys Function OFF Keys Keys Keys 1 2 90 FLMV Rear Panel Connectors pH Sensor Redox Sensor Model 90 FLMV OXYGEN pH COND SAL mV CHARGER D Dissolved Conductivity Battery Charger Oxygen Sensor TDS Temperature and RS232 Port and optional Sensor Stirrer 1 3 Menu and Function Keys Press the to function keys to select desired options within the menu system Additionally these keys perform the following function directly in normal measurement mode Press to start and stop the optional Dissolved Oxygen stirrer See section 3 5 O Press to start automatic datalogging in the Sampling Period and Duration mode See section 10 3 3 4 One touch Keys Press to obtain context sensitive help messages This function is disabled within menus Press to record readings into the Logger See section 10 Press to transmit current reading plus date and time to the RS232 port See section 11 2 Press the key to acce
70. rds AIR SPAN are deleted and the value being entered is displayed The Conductivity or TDS reading also appears as soon as the first numeric key is pressed Press the to correct any errors Ensure that the Dissolved Oxygen Conductivity TDS and Temperature readings are fully stable Press to calibrate A in the display will be replaced by a decimal point after a successful air calibration 4 The 90 FLMV is now calibrated and is ready for Dissolved Oxygen measurements Rinse the Dissolved Oxygen sensor in distilled water and blot dry before placing it into unknown samples 15 3 3 Dissolved Oxygen Calibration Notes 1 The relationship of Saturation and ppM depends on a number of variables so always calibrate in the mode required Do not try to infer Oxygen content from one mode to another A zero calibration should be performed at least monthly In applications where there is a low level of dissolved oxygen a zero calibration may have to be done weekly An air calibration should be performed at least weekly Of course more frequent calibration will result in greater confidence in results All calibration information is retained in memory when the 90 FLMV is switched off This information can be recalled or printed later using the GLP function see section 9 3 4 Dissolved Oxygen Calibration Messages 1 If a Zero calibration has been successfully performed the 90 FLMV will display the following message an
71. roduces 0 mV output at around 7 00 pH As the pH goes up an ideal pH electrode produces 59 16mV pH unit at 25 C As the pH goes down an ideal pH electrode produces 59 16mV pH unit In practice pH electrodes usually produce slightly less than this The output of a pH electrode is expressed as a percentage of an ideal electrode For example an ideal electrode that produces 59 16mV pH unit has 100 Slope An electrode that produces 50 15mV pH unit has 85 Slope Figure 18 2 illustrates the principle of electrode slope using a pH sensor as an example Response of pH Electrode as a Function of Slope Figure 18 2 68 18 3 3 Temperature Compensation The slope of a pH electrode is affected by temperature This effect is compensated for either by using an Automatic Temperature Compensation ATC probe Figure 18 3 shows the slope of a pH electrode at various temperatures pH Electrode Response as a Function of Temperature Electrode Potential mV at 0 oC 54mV pH Electrode Potential mV at 50 oC 64mV pH Electrode Potential mV at 100 oC 74mV pH Figure 18 3 18 3 4 Checking the reference junction of a pH electrode If pH readings are inaccurate or unstable the reference junction of the electrode may be blocked The following test can be performed to determine if the reference junction of a pH electrode is making adequate contact with the sample solution 1 Calibrate the 90 FLMV a
72. ry of the 90 FLMYV is faulty and requires servicing 70 19 Warranty TPS Pty Ltd guarantees all instruments and electrodes to be free from defects in material and workmanship when subjected to normal use and service This guarantee is expressly limited to the servicing and or adjustment of an instrument returned to the Factory or Authorised Service Station freight prepaid within twelve 12 months from the date of delivery and to the repairing replacing or adjusting of parts which upon inspection are found to be defective Warranty period on electrodes 1s three 3 months There are no express or implied warranties which extend beyond the face hereof and TPS Pty Ltd is not liable for any incidental or consequential damages arising from the use or misuse of this equipment or from interpretation of information derived from the equipment Shipping damage is not covered by this warranty PLEASE NOTE A guarantee card is packed with the instrument or electrode This card must be completed at the time of purchase and the registration section returned to TPS Pty Ltd within 7 days No claims will be recognised without the original guarantee card or other proof of purchase This warranty becomes invalid if modifications or repairs are attempted by unauthorised persons or the serial number is missing PROCEDURE FOR SERVICE If you feel that this equipment is in need of repair please re read the manual Sometimes instruments are received
73. s per section 6 2 2 Dilute 1 part of pH6 88 buffer with 9 parts of distilled water 3 Measure the pH of the diluted buffer The result should be 7 06 0 05 pH 4 If the value obtained is outside of these limits then clean the reference junction as per the instructions supplied with the pH electrode Re calibrate the 90 FLMV and repeat the test If the value obtained is still outside 7 06 0 05 pH then the electrode should be replaced n 69 18 3 5 Determining if an instrument or electrode is faulty The following test can be performed to help determine if the 90 FEMV or the pH electrode is faulty 1 Initialise the 90 FLMYV see section 13 2 Disconnect the pH electrode from the pH connector 3 Connect the centre pin of the pH connector with the outside frame of the connector using a short piece of wire or a paper clip etc 4 The meter should display approximately pH7 00 depending on the current calibration settings If the 90 FLMV is operating correctly the reading should be totally stable with the wire firmly in place If not the meter requires servicing 6 Now carefully disconnect the wire from the centre pin only make sure the other end of the wire remains connected to the outside frame of the connector 7 After an initial jump the reading should steadily drift away from 7 00 either up or down at a rate of approximately 1 pH or less every 3 seconds If the drift rate is faster than this the input circuit
74. sensor directly into the bottle of standard Discard the used sample of standard after use O O Y Plastic body k 10 Plastic body k 0 1 Glass body k 0 1 and k 1 Sensors Sensor Sensor 8 Select Conductivity Calibration e gt Fl Calibrate gt F2 Conductivity The calibration screen will be displayed with the Conductivity standard to be used For example 9 When the reading has stabilised press to calibrate The will now be replaced by a decimal point if calibration was successful 10 The 90 FLMV is now calibrated for Conductivity and is ready for use in this mode Ensure that the sensor is immersed at least as deeply as per the diagram in step 7 for all sample measurements 20 4 5 1 Conductivity Calibration Notes A Zero calibration should be performed at least monthly In low conductivity applications where a zero error is particularly significant a zero calibration may have to be done weekly 2 A Standard calibration should be performed at least weekly Of course more frequent calibration will result in greater confidence in results 3 Conductivity and TDS calibration data is stored separately in memory Ensure that the 90 FLMV has been correctly calibrated for the mode in which it will be used The 90 FLMV does not require re calibration when alternating between Conductivity and TDS modes providing the instrument has been correctly calibrated for each mode on the k factor sensor to be used 4 All cali
75. solutions Switch the unit OFF and then back ON again and repeat calibration Initialise the unit See section 13 Clean reference junction as per instructions supplied with the pH or reference electrode Flush with distilled water and replace electrolyte For automatic pH buffer recognition ensure that you are using buffers that match the selected buffer set see section 6 1 Otherwise ensure that the buffer value is entered correctly at pH calibration Clean sensor surface or glass bulb as per instructions supplied with the electrode Attempt rejuvenation as per instructions supplied with the electrode If unsuccessful replace electrode Dry in a warm place Replace buffers Refill with saturated KCI filling solution Clean reference junction as per instructions supplied with the electrode Clean glass bulb or platinum tip as per instructions supplied with the electrode Flick the electrode to remove bubble Check connectors Replace if necessary Ensure that the reference junction is fully immersed See diagrams in sections 6 2 or 7 1 Rinse electrolyte chamber with warm distilled water until dissolved Replace electrolyte Clean reference junction as per instructions supplied with the electrode 1 Check connector Replace if necessary 2 Replace electrode pH electrode glass bulb or Replace pH electrode internal stem cracked 60 17 5 Temperature Troubleshooting Temperature inaccurate a
76. tion To DELETE a break line double click on the line To MOVE a break line click and drag it Data preview 6 Simply press Finish at step 3 of the Text Import Wizard TPS recommends that the data format for each column be set once the data is in spreadsheet format For help on formatting the data columns charting graphing or other operations please consult the Microsoft Excel help file Alternatively please contact TPS and we will try to provide further assistance 52 12 Setting the Clock 1 Select the Clock Set up menu e gt F5 System gt F2 Set Clock 2 The display now shows the current time for example 3 Use the Numeric Keypad to enter the current time in 24 hour format then press Enter Alternatively press V7 to quit and retain the current setting 4 If you pressed above the display will now show the current date for example 5 Use the Numeric Keypad to enter the current date in dd mm yyyy format then press Enter Alternatively press V7 to quit and retain the current setting Notes l Press the key to make any corrections as required 2 The 90 FLMV tests that a valid time of the day is entered If an invalid time is entered eg 25 00 the 90 FLMV displays the message Invalid Time then returns to the time setting screen so that the correct time can be entered 3 The 90 FLMV tests that a valid day of the month is entered If an invalid date is entered eg
77. ts iden Clark type polarographic sensor with in built ATC Salinity Correction for ppM 0 to 50 0 ppK automatic using conductivity TDS reading Temperature Compensation Automatic for membrane permeability Automatic for Dissolved Oxygen solubility in ppM mode CalilbFAUOH ocolos bd as Automatic zero and span calibration Sensor Span Range 65 to 200 1 10 2 Conductivity 0 1 Sensor to 2 s uS cm 0 5 of full scale of to 20 uS cm selected range at 25 C to 200 uS cm to 2000 uS cm k 1 0 Sensor uS cm 0 5 of full scale of uS cm selected range at 25 C uS cm mS cm k 10 Sensor us cm 0 5 of full scale of uS cm selected range at 25 C mS cm mS cm Note Ranges are automatically selected Exact auto ranging points and full scales are subject to sensor performance Sensor LY Pe iia Ryton plastic body with two platinised platinum plates with in built ATC Temperature Compensation Automatic 0 to 100 C standard Conductivity sensor is limited to 60 9C Calibrations iii ttes Automatic zero and span calibration Sensor Span Range 25 of nominal k factor 8 1 10 3 TDS 0 1 Sensor to Va 3 ppM 0 5 of full scale of to 10 A ppM selected range at 25 C to 100 A ppM to 1000 ppM k 1 0 Sensor to 10 ppM 0 5 of full scale of to 100 2 ppM selected range at 25 C
78. urns all logged records from the 90 FLMV memory The data ends with the message ENDS lt cr gt Erase logged data E cr Erases all logged records from the 90 FLMV memory Returns the message ERASED lt cr gt to confirm that the records have been erased Continued over the page RS232 Commands continued 47 Request status information S cr Returns the model name firmware version number instrument serial number and number of logged readings in memory for example 90FLMV V6 0 S1234 7230 mASLB v lt cr gt where are spaces Note that the number of logged readings is right justified The meaning of the last group of characters is as follows m Dissolved Oxygen stirrer output is enabled AorP A indicates A amp B function is enabled P indicates A is set to Pond Number S Unit is powering Dissolved Oxygen stirrer L Automatic datalogging is enabled B Low Battery warning Extended datalogging function is fitted v Battery volts is available with V command Indicates new 90 series V6 0 and up Request GLP information 2G lt cr gt Returns all calibration GLP information plus the instrument model serial number and current date see section 11 7 for data format and hand shaking Enable Rate per Day or Time of J lt cr gt Starts automatic datalogging when the 90 FLMV is set up for Day automatic datalogging Rate per Day or Tim
79. utomatic replatiniser is available from TPS along with replatinising solution This will plate the electrodes for the right amount of time at the correct current Ordering details are as follows Automatic Conductivity Electrode Replatiniser Part No 122160 20mL Platinising Solution suitable for approx 30 uses Part No 122300 3 Conductivity electrodes can be manually replatinised according to the following procedure a b c d e f Soak the electrode in a solution of 1 part Concentrated HCI and 10 parts distilled water for approximately 5 minutes Rinse the electrode well in distilled water Immerse the electrode in platinising solution at least to the vent hole in the body Platinising solution is available from TPS part no 122300 Alternatively platinising solution can be prepared by dissolving 1g of Hydrogen Chloroplatinate H2PtCli in 30mL of distilled water and including about 0 01g of Lead Acetate CH3COO 2Pb and a drop or two of concentrated HCl Caution This is a dangerous solution and should be handled with the utmost care Apply a direct current of 10mA between pins 7 and 8 of the electrode plug as per the diagram below Reverse the polarity every 30 seconds After approximately 8 minutes 4 minutes per electrode plate they should have an even sooty appearance Avoid excess current as this will cause incorrect platinising After platinising rinse the electrode well in distilled water

90-FLMV Multi-Parameter Field Logger, v7.2

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