TUF330 - Solution Control and Engineering co.,ltd.
Contents
1. 0 C to 50 C Operating 10 C to 60 C Storage 110 240 VAC 50 60 Hz Max 5 watts 24 VDC option m litres gallons Imperial and US metres sec feet sec 0 2 12 m sec to 4 Significant Figures 12 Digits Opto isolated with user definable scaling 0 1 of full scale User definable scaling Flow Velocity Range 0 2 m sec 4 m sec 8 m sec 0 2 m sec 8 m sec 12 m sec 0 2 m sec 4 m sec 7 m sec 0 2 m sec 4 m sec 7 5 m sec 1MHz 2MHz 0 5MHz Standard IP65 50 Ohm Coax Cable 3 metres Standard Optional up to 200 20 C to 200 C D only up 80 C 1 2 of reading or 0 02 m sec whichever is the greater Specification assumes turbulent flow profile with Reynolds numbers above 4000 REPEATABILITY 0 5 with unchanged transducers position PIPE MATRIALS Any sonic conducting medium such as Carbon Steel Stainless Steel Copper UPVC PVDF Concrete Galvanised Steel Mild Steel Glass Brass Includes lined pipes Epoxy Rubber Steel Plastic Flotech reserve the right to alter any specification without notification 392. be used for laminar flow applications Figure 8 Figure 8 shows a uniform profile as compared to a distorted profile The difference between a and b is that the Mean Velocity of the flow across the pipe is different and the TUF330 expects a uniform flow as in a The dis torted flow in b will give measurement errors which cannot be predicted or compensated for Flow profile distortions result from upstream disturbances such as bends tees valves pumps and other similar obstructions To ensure a uniform profile the transducers must be mounted far enough away from any cause of distortion such that it no longer has an effect 35 TEPA 9 CORRECT a The minimum length of upstream straight a i pipe is 20 diameters and 10 diameters downstream which ensures that accu rate results will be achieved Flow mea surements can be made on shorter lengths of straight pipe down to 10 di lp i Fal rs Fai je ER ameters upstream and 5 diameters W aw jii aT X downstream but when the transducers lt 200 i are sited this close to any obstruction errors can be considerable It is not possible to predict the amount of error as this depends entirely upon the type of obstruction and the configuration of the pipework The message therefore is clear Do not expect to obtain accurate results if the transducers are positioned closer than allowed to any obstruction that distorts the uniformity of the flow profile Examples of the e
3. d ce ee a S g m 8 a kg h Usg m Uskg h m3 h k k kkk m3 m m3 s m s ft s wkKRKKK k kkk The following will now be displayed Attach sensors REFLEX Sep mm inches Pressing ENTER atthis point will take the instrument into reading flow I m 0 00 l 000 0 16 TUF330 C 3 MAIN MENU View Edit Site From the MAIN MENU select View Edit site data by pressing ENTER This enables the user to view and edit the application data that has been entered into the unit previously The display will show the following Press ENTER to select I m 0 00 l 000 0 The display will show the following Press ENTER to select MAIN MENU View Edit Site The display will show the following VIEW EDIT SITE Dimension MM INCHES To change the dimensions press ENTER Select the units by pressing SCROLL Press ENTER to select This will convert all previous data entered into the units selected The display will now show the following VIEW EDIT SITE Pipe OD 55 0 To change the outside diameter of the pipe press ENTER Enter the new outside diameter in the units selected previously and press ENTER The display will now show the following VIEW EDIT SITE Wall thickness 3 0 To change the pipe wall thickness press ENTER Enter the new wall thickness in the units selected and press ENTER The display will now show the following VIEW EDIT SITE Lining thick 0 0 TUF330 To change or enter a pip
4. factory will have had the EEROM memory wiped clean Apply power Initial display will show iSOLV Within 5 seconds the display will change to DIMENSION Millimetres Application data can now be keyed in If the instrument has been used then application data will be stored in the EEROM and the following will be displayed If SCROLL is not pressed within 5 seconds after the initial display the instrument will go directly to flow mode Apply power Initial display will show iSOLV PRESS SCROLL within 5 seconds of initial start up Display will then show ENTER PASSWORD Key in password 2000 only required if the unit has been previously used 11 TUF330 ENTER PASSWORD Display will show MAIN MENU Quick Start MAIN MENU To get into the MAIN MENU press RESTART SCROLL then enter the password 2000 The MAIN MENU has 5 options that are selectable by using the scroll key Press ENTER to select MAIN MENU Quick Start View Edit Site Setup sensors Calibrate 4 20mA Read flow TUF330 C 2 MAIN MENU Quick Start The Quick Start option enables the user to quickly read flow The display will show the following MAIN MENU Quick Start Press ENTER to select this option and enter application data The user now has the option of selecting millimetres or inches Press SCROLL to display units and ENTER to select DIMENSION Millimetres The display will show the following Enter the outside diameter and
5. now show the following FUNCTIONS Reset total flow This function resets the total Flow Press ENTER The display will now ask the following RESET TOTAL FLOW Are you sure Answer YES by pressing ENTER and NO by pressing SCROLL If you have answered YES the following will be displayed Press SCROLL to continue RESET TOTAL FLOW Total reset If you have answered NO the following will be displayed Press SCROLL to con tinue FUNCTIONS Reset total flow D 7 FUNCTIONS Damping The display will show the following FUNCTIONS Damping 5 This option is used when flow readings are unstable due to turbulence caused by internal obstructions or bends etc Damping or averaging can be used to make the readings more stable It can be set to up date the display between every 3 to 100 seconds Press ENTER to select Enter the time in seconds then press ENTER TUF330 D 8 FUNCTIONS Cal Factor The display will show the following FUNCTIONS Cal factor 1 000 This facility should never have to be used if the correct application data has been entered into the unit when being installed The calibration factor enables the instrument to be calibrated to any existing meter or flow rate The transducers are always calibrated to work with the elec tronics supplied If for any reason the transducers are damaged the new ones supplied will not have been calibrated with the electronics The calibration factor could then be used to give the sa
6. operating temperature above or below ambient temperature ensure that the transducers reached and maintained at the application temperature before undertaking cali bration When applying the transducers to low tempera ture pipes do not allow the pipe surface to ice up between the transducers and the pipe wall Figure 13 Wherever possible insulate the transducers such that variations in ambient air temperature do not effect the relationship between the transducers and the liquid temperature The instrument automatically compensates for changes in application temperature over a range of approximately 20 C 38 TUF330 H SPECIFICATION ELECTRONIC ENCLOSURE Protection Class Material Dimensions Display Keypad Sensor Connections All Other Connections Temperature Range SUPPLY VOLTAGE Switchable FLOW OUTPUTS Flow Display Analogue Set Point or Pulse metres ACCURACY Volumetric Flow Flow Velocity Flow Rate Total Flow Signal Level Indication ERROR messages 4 20mA into 750Q Resolution Max 1 pulse per second Pipe Sizes A 13 mm 89 mm B 90 mm 1000 mm C 300 mm 2000 mm D 1000 mm 5000 mm Frequency Flow Transducer Protection Flow Transducer Cables Flow Transducer Cable Length Flow Transducer Temp Range IP67 ABS 264 x 230 x 101 mm 2 x 16 Character Super Twist LCD backlit 16 key tactile membrane TNC Coax Connectors IP65 Glands
7. value 40000 Use the scroll and decimal point key to set 20mA and keys 5 and 6 to trim Press ENTER when complete The following will be displayed Press SCROLL MAIN MENU Calibrate 4 20mA The following will be displayed MAIN MENU Read flow 23 TUF330 C 6 MAIN MENU Read flow Pressing SCROLL will take the instrument back to MAIN MENU Quick start Pressing ENTER displays the following Approx max flow KKK K l m It is possible to change the flow units by pressing SCROLL When a new unit is selected press ENTER Pressing ENTER displays the following Press ENTER to read flow Attach sensors REFLEX Sep 10 2 This informs the user of the mode of operation and the separation distance Pressing SCROLL takes the instrument into SETUP SENSOR mode SETUP SENSORS Mode REFLEX Pressing ENTER will read flow I m 0 00 l 0 00 There are three keys that are active FUNCTION RESTART and SCROLL see also page 11 The Function key when pressed in flow mode displays a range of information that will improve the performance of the instrument and will assist with the setting up of the unit The Restart key will at any point in the program display the start up message This allows the user to restart the program from the beginning The Scroll key when pressed in flow mode will display the signal level and the mA output Pressed for a second time it will display the ERRORS PENDING see page 33 Error amp Warning Messa
8. ANSDUCERS Each instrument uses two identical transducers which transmit and receive the ultrasonic waves They are clamped to the pipe surface using the mounting hard ware supplied as described on page 6 The standard transducers are made from a Peek material with an aluminium plate supporting the stud used to lock the sensor in position A flying armoured lead is attached between the sensor block and the tuning circuit Transducers are supplied according to the pipe size and flow velocity and are available to meet an operating temperature range from 20 C up to 200 C e Figure 2 1MHz Sensors with TNC Coaxial Connector B 3 Transducer Connections Transducers are connected to the electronics from the tuning circuit by TNC connectors All other output and input connections are made through metal glands to the clearly marked terminals Only one current output can be used with the flow meter 12323466T 11213 b n hon e o Aiii iy H DHD RELAY w Cok seneor connectors lt a Coax cable Figure 3 Transducer Connections TUF330 B 4 Transducer Hardware Transducer alignment guide rails chains and couplant are supplied with all units in order to ensure that the transducers are accurately aligned with respect to the pipe axis A single guide rail assembly is supplied for mounting the transducers in Reflex mode and two guide rails are provided for mounting in Diagonal mode Figure 4 1MHz Reflex Figur
9. OLL and ENTER SETUP 4 20MA Units Vm It is possible to set the output different from that on the display For example the display may show gallons minute but the output needs to be set up in m hour Scroll through the options and press ENTER to select 26 TUF330 The display will show the following SETUP 4 20MA Max 1000 This function allows the user to scale the 4 20mA Press ENTER to select and enter your required maximum flow rate in the units selected For example when the flow rate reaches the maximum set the output will be 20mA Press ENTER when complete The display will show the following SETUP 4 20MA Min 000 The user is now required to enter the minimum flow rate required in the units selected Press ENTER when complete The display will show the following SETUP 4 20MA mA on error 22 This gives an error output which would inform the user of loss of signal This can be set to any figure between zero and 24mA but defaults to 22mA Press ENTER to select enter the figure required and press ENTER The display will show the following SETUP 4 20MA Exit Press SCROLL to stay in the SETUP 4 20mA menu or ENTER to go back to the FUNCTIONS menu 27 TUF330 D 3 FUNCTIONS Pulses set point The following will be displayed Press ENTER to select FUNCTIONS Pulses set point This gives the user a choice of using a pulse output or the set point facility Pulse output and set point cannot be used at the sa
10. TUF 330 INSTALLATION AND OPERATING INSTRUCTIONS TUF330 CONTENTS INTRODUCTION HARDWARE Electronics Housing Transducers Transducer Connections Transducer Hardware Transducer Mounting Transducer Cables Keypad MAIN MENU Power up Quick Start View Edit Site Data Set up Sensors Calibrate 4 20mA Read Flow FUNCTIONS Display Set up 4 20mA Pulses Set Point CutOff M S Set Zero Flow Reset Total Flow Damping Cal Factor Diagnostics Save And Exit ERROR MESSAGES WARNING MESSAGES coi ooo opto mo A TUF330 G APPLICATION INFORMATION G 1 Application Notes 34 G 2 Select a Metering Position 35 G 3 Mounting The Transducers 36 G4 Liquid Conditions 38 G 5 Propagation Velocity 38 G6 Maximum Flow 38 G 7 Application Temperature 38 G 8 Flow Range 38 H SPECIFICATION 39 WARNING Users should ensure or note that a TUF 330 is not certified for use in hazardous areas b The local site safety regulations are complied with c Work is carried out in accordance with The Health amp Safety at Work Act 1974 CE MARKING The TUF330 has been tested and found to conform to EN50081 1 Emission Standards and EN50082 1 Immunity Standards The tests were conducted by AQL EMC Ltd of 16 Cobham Road Ferndown Industrial Estate Wimborne UK BH21 7PG The unit was tested with all cables as supplied of a maximum length of 3m While the operation of the unit may not be affected by the use of longer cables Flotech can m
11. ake no statement about conform ance to the above standards when these cables are in use WARRANTY The TUF330 Ultrasonic liquid flow meter is guaranteed by Flotech to be free from defects in materials and workmanship for a period of one year from the date of shipment to the original customer provided that the equipment has been installed and used in the manner described in this User s Manual Fuses and sensor cables are not included in this warranty If any problems develop take the followings steps 1 Notify Flotech or the Distributor from whom you purchased the meter giving full details of the prob lem Be sure to include the model and serial numbers of your flow meter You will then receive service data and or shipping instructions depending on your problem 2 If you are instructed to send your meter back to the factory please send it prepaid to the authorised repair station as indicated in the shipping instructions The warranty of the TUF330 Ultrasonic Liquid Flow meter by Flotech is limited to those stated above and Flotech will not be liable for anything beyond this TUF330 A INTRODUCTION TUF330 is a Clamp on liquid flow meter that uses the Transit Time method of measurement to read flow It is able to measure the flow of liquid in any pipe from 13mm to 5000mm providing the pipe is flooded and the correct transducers are used Units are supplied according to application data provided by the customer The instrum
12. and the SCROLL key is not pressed it automatically returns to flow mode Scroll Key When the SCROLL key is pressed in flow mode the display will read the following Signal 80 0 00 mA This displays the signal level of the instrument and the current output status of the 4 20mA Press ENTER again and the following will be displayed ERRORS PENDING No errors 9 TUF330 This will display all Error and Warning messages see page 33 To program the TUF330 accurate application data must be keyed in via the keypad Data and instructions are requested via the display and all questions must be answered before the program will step through to the point of measuring flow Once the unit has been programmed the data can be reviewed and changed if necessary The instrument displays information in the following 3 ways Flow in selected units The flow information can be factored to suit the users requirements by selecting CAL FACTOR from the FUNCTIONS menu The Totalised Flow data can also be reset to zero TUF330 C PROGRAMMING MAIN MENU C 1 Power Up DO NOT PROVIDE POWER TO THE INSTRUMENT UNTIL THE SERVICE COMPARTMENT COVER HAS BEEN REPLACED The power supply is factory set The right hand switch is used to change from 110 to 220VAC When power is applied to the TUF330 it will react in 2 distinctly different ways depending upon whether any application data has been programmed into the EEROM All new meters received from the
13. ble by pressing scroll The display will show the following SETUP SENSORS Mode REFLEX Sensor params Read flow Exit and default Select mode of operation by pressing SCROLL SETUP SENSORS Mode REFLEX TUF330 The display will show the following MODE Reflex Pressing SCROLL will allow you to choose between Reflex and Diagonal opera tion Press ENTER when new mode is selected The display will show the following SETUP SENSORS Sensor params The user cannot change this option It is only used by Flotech engineers to set sensor parameters for a particular application and to make sure the correct transducers are supplied with the instrument If this option is selected in error the instrument will ask for a password that is only known by Flotech engineers Pressing SCROLL will move the instrument onto the next option The display will show the following SETUP SENSORS Read flow If the sensor mode has been changed from the default settings i e Reflex to Diagonal or Diagonal to Reflex then this option will have to be selected to make sure that the new mode of operation is used to read flow If this is not selected the default settings will be used The display will show the following SETUP SENSORS Exit and default Press ENTER at this point to Exit and return to the MAIN MENU This will re set all the default sensor settings in the instrument that may have been changed by the user Pressing ENTER to contin
14. e 5 Diagonal Beam Mounting Assembly Mounting Hardware B 5 Transducer Mounting The two different methods of mounting the transducers are shown above When ordering the TUF330 specific application information should have been given This information determines the correct hardware to be supplied with each instru ment Reflex Mode Reflex mode is a default setting on all applications up to 215mm Above this the instrument will default to Diagonal mode It is possible to change these default settings if required see page 20 Set up sensors Before attempting to attach the transducers it is imperative to ensure that the correct position has been chosen to site the transducers and that the pipe sur face conditions are suitable Go to page 34 and carefully follow all instructions for the selecting and preparing the transducer mounting site TUF330 At this point program the instrument to determine the separation distance When you have this information from the instrument follow the set up procedure below Reflex Set up Procedure a Insert the transducers into the guide rail so the tails come out of either end b By turning the locking nut centre clockwise withdraw the transducers up into the guide rail c Apply a bead of coupling grease to each transducer See page 37 figure 12 d Attach both lengths of chain to the quick links provided and offer the guide rail up to the pipe wall at 45 e Wrap the chain around the pipe a
15. e lining thickness press ENTER Enter the new lining thickness in the units selected previously and press ENTER The display will now show the following VIEW EDIT SITE Wall M Steel To change the wall material of the pipe press ENTER Scrolls through the op tions press ENTER when a new material has been selected The display will now show the following VIEW EDIT SITE Lining It will only be possible to change the pipe lining material if a lining thickness has been entered previously To change the lining material press ENTER Use the SCROLL key to select from the options available and press ENTER The display will now show the following VIEW EDIT SITE Fluid WATER To change the fluid type press ENTER Use the scroll key to select from the options available and press ENTER The display will now show the following VIEW EDIT SITE Fluid C 20 0 To change the fluid temperature press ENTER Press ENTER again when a new temperature has been entered The display will now show the following VIEW EDIT SITE Read flow Pressing SCROLL at this point will ask the user if they wish to exit the VIEW EDIT SITE loop Pressing ENTER will take the instrument back to the MAIN MENU option Setup sensors m TUF330 Pressing ENTER will display the following Approx max flow RAR l m To change the flow units press SCROLL and use the scroll key to select from the options available and press ENTER Pressing ENTER will d
16. ent displays volumetric flow rate in m hr m min m sec g min USGal hr l min l sec and linear velocity in metres and feet per second The total volume of flow will be displayed up to a maximum 12 digit number The flowmeter is supplied with electronics sensors and all mounting hardware B HARDWARE Figure 1 B 1 Electronics Housing iy An ABS housing with an opaque door contains a the master PCB The housing is designed for AD fil eee wall mounting using the brackets provided see 4 k l es Figure for mounting pattern Drilling further al 7 fixing holes in the Housing remove the IP67 r protection rating and CE approval Mounting the housing into position does not require the removal of the electronics or the front display panel DO NOT PROVIDE POWER to the instrument until the service compartment cover has been replaced The electronics are factory set for a particular supply voltage Should it be necessary to change the settings for the power supply see page 11 Power up Having completed the procedure for mounting the electronics connecting all cables and checking the power supply the power can now be applied TUF330 is now ready for programming A full programming procedure is described on page 11 Before programming the instrument it is necessary to attach the transducers to the pipe wall such that they can be finally locked in the correct position based on exact data provided by the instrument TUF330 B 2 TR
17. ffects of two different pipe configurations are shown in Figure 10 TYPICAL ERROR PROFILE W5 BEND TEPCAL EPROR FJALE VS COAMETES TRASITION ENT ERROR MENN b MEASUREMENT ERROA Gik TERG PRG TRANSITION DIAMETERS FROM BEND Figure 10 G3 Mounting the Transducers It will be impossible to achieve the accuracy of measurement specified for the TUF330 if the transducers are not clamped to the pipe correctly and if the data I D O D Temperature Pipe Material are not accurate The transducers are supplied with a guide rail the purpose of which is to ensure that the transducers are aligned accurately with the pipe axis and that the face of the sensor is tangential to the axis Apart from the correct positioning and alignment of the transducers of equal importance is the condition of the pipe surface in the area under each of the transducers 36 TUF330 An uneven surface that prevents the transducers from sitting flat on the surface of the pipe can cause Signal Level and Zero Offset problems The following proce dure is offered as a guide to good practice with respect to positioning and mount ing the transducers 1 Select the meter positioning as according to the rules laid down on page 35 2 Inspect the surface of the pipe to ensure it is free from rust and unevenness Transducers can be mounted directly on painted surfaces as long as the sur face is smooth and that the underlying metal surface is free from rust particle
18. ges When pressed for a third time it will read flow 24 TUF330 D FUNCTIONS When the instrument is performing the measurement there are certain functions that the user can access These functions are accessible by pressing the func tion key on the keypad then entering the password 2000 The display will read the following Select one of the options by using the scroll key and press ENTER to select FUNCTIONS Display Setup 4 20mA Pulses set point Cutoff m s Set zero flow Reset total flow Damping Cal factor Diagnostics Save and exit D 1 FUNCTIONS Display The display will show the following Press ENTER to select Functions Display Vm By pressing ENTER then SCROLL the user is able to change the measuring units When selected press ENTER TUF330 D 2 FUNCTIONS Setup 4 20mA The display will show the following Press ENTER to select Functions Setup 4 20mA The display will show the following Scroll through each item and press ENTER to select SETUP 4 20MA mA out Output Units Max Min mA on error Exit The display will show the following Press Enter to select SETUP 4 20MA Output OFF This shows the user what the output is giving at any particular time Press SCROLL to continue The display shows the following Select the output required and press ENTER OUTPUT It is possible to choose between switching the output ON OFF or selecting the output required by pressing SCR
19. he Reflex mode it is possible to reprogram the instrument to operate in Diagonal mode see page 20 Set up Sensors Diagonal Set up Procedure a Using whatever means available mark a reference line around the circumfer ence of the pipe reference line D As shown in figure 7 b Locate and mark two positions exactly 180 apart around this reference line c On both of these positions draw a reference line E perpendicular to line D parallel to the pipe axis and approximately 1 metre long See figure 7 d Take each of the guide rails and load the transducers as described previously on page 5 Only one transducer goes in each guide rail e Attach the one guide rail to the pipe using the chain provided such that it is parallel to the reference line E and position so that the transducer face can be aligned with reference line D f Program the flow meter and obtain the separation distance g From the intersection of the circumference reference line D and the second reference line E measure and mark the separation distance XXX Now mount the second guide rail such that the transducer face can be positioned on this intersection ensuring that the guide rail is parallel to the reference line E See figure 7 h Screw down both of the transducers and lock in position as previously described S0PARA TIO DG TTANCE soo mm Figure 7 Foul Liras E TUF330 HINT DRAWING A TRUE CIRCUMFERENCE AROUNDA PIPE An eas
20. ignals This could happen for a variety of reasons Firstly check that all cables are con nected transducers are on the pipe correctly and at the correct separation dis tance Check that there is couplant on the transducers This message may also appear when trying to measure a partially full pipe aer ated liquid or when the particulate content of that liquid is too high The condition of the pipe being measured could also be a problem F WARNING MESSAGES W1 Check Data This message occurs when the application information has been entered incor rectly or the transducers have been attached to the wrong pipe size This will cause the timing to be in error The site data needs to be checked and the instru ment reprogrammed W2 Timing Poor Unstable signal timing or differing up down stream times indicate that the liquid is aerated or pipe surface is of poor quality W3 Signals Poor This warning appears when there is a signal lower than 25 This could be due to the application or a poor quality pipe etc W4 mA 1 Over The mA 1 output is over range when the Flow is higher than the maximum mA range It is possible to re scale the 4 20mA to be able to cope with the higher range W6 Pulse at Max This message occurs when the pulses have exceeded the maximum setting It is possible to re scale the pulse output to cope with the higher flow rate 33 TUF330 G ADDITIONAL INFORMATION G1 APPLICATION NOTES TUF330 is a Trans
21. isplay the following Attach sensors REFLEX Sep 10 2 Pressing ENTER at this point will take the instrument into reading flow l m 0 00 000 0 19 TUF330 C 4 MAIN MENU Setup sensors Press ENTER to select this option MAIN MENU Setup sensors This gives the user the opportunity to change the mode of operation from Reflex to Diagonal see figure 5 page 6 When application information is programmed into the instrument it automatically selects the mode of operation from that data It is possible however to use the same sensors in different modes The Setup sensors option is available for two main reasons Firstly if from the data that has been entered the instruction comes back that the sensors should be mounted in Diagonal mode it may be that this is not possible in the case of a partially buried pipe Under these circumstances provided that the velocity is low enough it may be possible to use the transducers provided in Reflex mode see figure 4 page 6 The second reason for this option is that in the case of applications where the signal strength is not strong enough to get through a corroded pipe in Reflex mode the instrument may be used in Diagonal mode This has the effect of increasing the signal strength and maximum flow velocity The display will read the following SETUP SENSORS Mode REFLEX To change the mode of operation press ENTER There are 4 options under the heading of SETUP SENSORS and these are selecta
22. it Time Ultrasonic flowmeter which has been designed to work with Clamp On transducers thus enabling liquid flowing within a closed pipe to be measured accurately without the need for any mechanical parts to be inserted either through the pipe wall or protrude into the flow system The meter is controlled by a micro processor containing a wide range of data which enables the instrument to measure flow in any pipe diameter from 13mm bore up to 5000mm made of any material and over a wide range of operating temperatures The system operates as follows FLOW When ultrasound is transmitted from transducer X to transducer Y the speed at which the sound travels through the liquid is accelerated slightly by the velocity of the liquid If sound is transmitted in the opposite direction from Y to X it is decelerated because it is travelling against the flow of the liquid The difference in time taken to travel the same distance but in opposite directions is directly propor tional to the flow velocity of the liquid Having measured the flow velocity and knowing the pipe cross sectional area the volumetric flow can be easily calculated All of the calculations required to first determine the correct siting of the transducers and subsequently compute the actual flow are carried out by the microprocessor To measure flow it is first necessary to obtain detailed information about each application which is then prog
23. ll show the following FLUID Water Press Scroll There are 6 fluid options that are selectable by using the scroll key Select the fluid required then press enter to select Diesel oil Freon Other m s If Other m s is selected the user needs to know the speed of sound in metres per second of the particular fluid being measured Enter a figure and press ENTER Contact Flotech if the sound speed is not known The display will show the following FLUID TEMP To enter a minus temperature press Y on the keypad When the temperature has been entered press ENTER The TUF330 has a temperature range between 20 C and 200 C If the temperature entered is out of range the following will be displayed Temp out of range Press any key When the correct temperature is entered the following will be displayed Approx max flow k k kkk I m TUF330 The data that is entered and the application information that has been given to Flotech when purchasing the equipment determine the approximate maximum flow The instrument will always default to litres per minute The instrument now displays the maximum flow rate that it is capable of with the sensors provided and the application data that has been entered by the user Pressing SCROLL at this point will allow the user to change the units to be dis played in the flow mode Press ENTER when the units have been selected Approx max flow kKREK l s wkRKERK l m Mi
24. me reading as other transducers If the new reading is 4 higher than normal then entering 0 96 will reduce the flow reading by 4 If the reading is 4 lower than normal entering 1 04 would increase the reading by 4 When the instrument is supplied it will always default to 1 00 If it has to be changed the new cal number will stay in the memory until changed again Press ENTER to select Enter new data and press ENTER D 9 FUNCTIONS Diagnostics The display will now read FUNCTIONS Diagnostics Diagnostics is not an option for the user The numbers displayed cannot be changed in any way and are only of benefit to Flotech engineers when testing the instrument or fault finding Press SCROLL to continue D 10 FUNCTIONS Save and Exit The display now reads FUNCTIONS Save and exit Press SCROLL to start at the beginning of the FUNCTIONS menu again or EN TER to save all the changes made and read flow TUF330 E ERROR and WARNING MESSAGES E1 High Flow When the instrument is programmed the user is informed of the maximum flow rate that the instrument can measure If this is exceeded the High flow message occurs It may be possible to get round these problems by using another set of transduc ers in another mode This should not be necessary as the unit would have been supplied for a particular application with the correct transducers E2 No Flow Signals This message appears when the two transducers cannot send or receive s
25. me time Scroll through the following options Press ENTER to select PULSES SET POINT Units Vm Output I pulse Set point Exit The display shows the following Use the scroll key to select units press ENTER PULSES SET POINT Units Vm At this point the user is able to select the units required by pressing ENTER Scroll through the options required and press ENTER when selected The display will show the following Press ENTER to select PULSES SET POINT Output OFF PULSES SET POINT Note The display will show the previous selection OUTPUT Pulses Set point Press SCROLL to select and then ENTER This facility allows the user to set the Pulses Set point or switch it off altogether Selecting Off and pressing ENTER will move the program to Cutoff m s Press SCROLL to select Pulses or Set point and press ENTER 28 TUF330 If Pulses were selected the display will show the following PULSES I pulse 1000 This can be scaled to the users requirements up to a maximum of one pulse per second Or SET POINT Set point 1000 The Set point can be set to the users requirements to trigger an alarm or indica tor when the flow has reached a minimum or maximum level The instrument defaults to 1000 This will be in the units selected previously It can now be changed to the required amount by pressing ENTER Enter the new amount then press ENTER The display now reads the following Press ENTER to return to Functi
26. nd connect to the J bolt Complete the same for both ends of the guide rail then tighten the locking nuts on the J bolt This will secure the complete assembly to the pipe f By turning the centre of the locking assembly anti clockwise lower one block onto the pipe Now adjust the second block to required separation distance and repeat the procedure The separation distance is measured from the front edge of each block and not the centre of the locking nut See figure 6 g If the instrument now reads a negative flow swapping the TNC connectors on the instrument can change this h Now lock the transducers in position by tightening the nut on locking assembly DO NOT USE EXCESS PRESSURE Note When moving the transducers into position ensure that they are withdrawn into the guide rail as far as possible This ensures that the couplant will not be removed from the transducer face before it is screwed down into position DISTANCE Figure 6 All transducers are mounted in Reflex or Diagonal mode as described on page 6 The guide rail assemblies are held in position using chains 7 TUF330 Diagonal Beam Mode Diagonal beam mounting means the two transducer blocks are mounted on oppo site sides of the pipe as shown in figure 7 This is the default setting for all applications above 215mm If you encounter a difficult application or the maximum flow velocity is outside of the default operating range when working in t
27. ned and clamped exactly at the distance specified 8 Always use the couplant provided 37 TUF330 G4 Liquid Conditions Transit Time ultrasonic meters perform best on liquids that are totally free from entrained air and solids With sufficient air in the system the Ultrasound beam can be attenuated totally and therefore prevent the instrument from working Often it is possible to tell whether there is air in the system or not If a flow signal cannot be obtained a simple test to determine whether the flow is aerated involves cutting off the flow for a period of 10 15 minutes During this time the air bubbles will rise to the top of the pipe and the flow signal should return If the flow signal does returned switch on the flow measurement If not the entrained air is locked in the system and will very quickly disperse and kill the signal G5 Propagation Velocity To make a flow measurement using the TUF330 on any liquid other than water it is necessary to know the propagation velocity in metres second of the particular liquid Flotech can supply this information G6 Maximum Flow The TUF330 is normally supplied with hardware suitable for the specific application for which the instrument has been purchased It is possible to use the instrument on a wide range of applications as long as the transducers will cope with the maximum velocity and temperature required G7 Application Temperature G 8 FLOW RANGE On any application with an
28. ons PULSES SET POINT Exit D 4 FUNCTIONS Cutoff m s The display will now show the following FUNCTIONS Cutoff m s The instrument has a preset CUTOFF of 0 05m sec which has been programmed into the instrument Flotech cannot guarantee measuring flows below this range because of instabilities in the measuring process It is possible for the user to change or cancel this figure but Flotech cannot guarantee the performance be low this It is also possible to enter any figure up to a velocity of 1m sec 29 TUF330 D 5 FUNCTIONS Set Zero Flow Press ENTER to select FUNCTIONS Cutoff m s On some applications the instrument is capable of picking up noise which may show a small offset when in flow mode This offset should be cancelled out which will increase the accuracy of the instrument Before this function is used you have to be sure that the flow has stopped com pletely To set zero flow before the flow has stopped will result in an error mes sage This will occur when the flow is still above 0 25m sec This could mean that the flow has not totally stopped Press SCROLL to answer NO and ENTER to answer YES The following is displayed FLOW gt 0 25 m s Continue If the flow is below 0 25 m sec then the following will be displayed Stop the flow and press ENTER Follow the instructions on the display by pressing ENTER Zero flow set Press ENTER 30 TUF330 D 6 FUNCTIONS Reset Total Flow The display will
29. press ENTER PIPE OD mm inches Enter the wall thickness in the selected units and press ENTER WALL THICKNESS mm inches The display will show the following LINING THICKNESS mm inches If the pipe has a LINING enter the thickness now and press ENTER If there is no LINING press ENTER to continue WALL M Steel The display will show the following There are 11 wall material options that are selectable by using the scroll key 13 TUF330 Select the material required and press ENTER when displayed WALL M Steel S Steel 316 S Steel 303 Plastic Cast Iron Ductile Iron Copper Brass Concrete Glass Other m s If Other m s is selected the user needs to enter the speed of sound in metres per second of the particular pipe material being used Enter a figure and press EN TER Contact Flotech if the sound speed is not known If a Lining material thickness has been selected the following is displayed LINING Steel There are 6 Lining material options that are selectable by using the scroll key These are only displayed if a Lining was selected previously Select the material required then press ENTER to select LINING Steel Rubber Glass Epoxy Concrete Other m s If Other m s is selected the user needs to know the speed of sound in metres per second of the particular lining material being used Enter a figure and press ENTER Contact Flotech if the sound speed is not known TUF330 The display wi
30. rammed into the processor via the keypad This information must be accurate otherwise flow measurement errors will occur Further having calculated the precise position at which the transducers must be clamped onto the pipe wall it is equally important to align and separate the trans ducers accurately with respect to one another as failing to do so will again cause errors in measurement 34 TUF330 Finally to ensure accurate flow measurement it is imperative that the liquid is flowing uniformly within the pipe and that the flow profile has not been distorted by any upstream or downstream obstructions To obtain the best results from the TUF330 it is absolutely necessary that the following rules for positioning the transducers are adhered to and that the condi tion of the liquid and the pipe wall are suitable to allow transmission of the sound along its predetermined path G 2 Selecting A Meter Position As the transducers with theTUF330 are clamped to the outside surface of the pipe the meter has no way of determining exactly what is happening to the liquid The assumption therefore has to be made that the liquid is flowing uniformly along the pipe either under fully turbulent conditions or under laminar flow conditions It is further assumed that the flow velocity profile is uniform for 360 around the pipe axis The TUF330 is normally supplied calibrated for use on turbulent flows but by adjustment of the CAL FACTOR the instrument can
31. s On bitumen or rubber coated pipes the coating must be removed in the area under the transducers as it is preferable that the transducers are mounted directly on to base metal 3 Transducers can be mounted on both Vertical or Horizontal pipe runs cy CAKA wW L CORRECT INCORRECT s Figure 11 Horizontal pipes Figure 12 4 Apply interface couplant to the face of the transducers The amount of couplant used is extremely important particularly on pipes of less than 100mm bore Use the syringe supplied with the instrument and apply couplant as shown On small pipes below 90mm the amount of grease used must be approximately 20mm long and 2mm maximum diameter Using more grease will cause wallsignals to be generated which cause errors in measurement On Stainless Steel pipes the amount of couplant applied should never exceed the amount indicated in the examples above For large plastic and steel pipes the amount of couplant applied is less critical however do not use more than is absolutely necessary 5 Attach the guide rail assembly to the pipe so that it is perfectly parallel to the pipe axis 6 When screwing the transducers on to the pipe surface use only enough force to ensure that the transducer is flat against the pipe surface and then lock in position 7 Clamping the transducers in exactly the correct position is extremely important The TUF330 calculates the separation distance and the transducers must be positio
32. ue will display the following Approx max flow Im 21 TUF330 Pressing ENTER again displays the following Attach sensors REFLEX Sep mm inches The instrument now displays the mode of operation and separation distance Attach the transducers as described on page 6 Pressing ENTER will take the instrument into reading flow I m 0 00 l 000 0 TUF330 C 5 MAIN MENU Calibrate 4 20mA Note A meter is required to measure the output current The display will read the following Press ENTER to select MAIN MENU Calibrate 4 20mA The 4 20mA output is calibrated before it leaves the factory and should not need adjusting although this option allows the user to adjust it if necessary to match a specific requirement The DAC value is a number between 0 and 40 000 which is a number internal to the TUF330 The first stage is to adjust the output current to 4mA Use the scroll key decimal point key or keys 5 and 6 The scroll and decimal point key move the DAC value in large steps of 25 Keys 5 and 6 move the value one digit at a time The DAC value should be approximately 8000 for 4mA and 40 000 for 20mA By watching the actual current value displayed on the meter it is possible to set this exactly The display will show the following CAL 4mA DAC value 8000 Use the scroll and decimal point key to set and keys 5 and 6 to trim Press ENTER when complete The display will then show the following CAL 20mA DAC
33. y way to draw a perpendicular circumference around a large pipe is to wrap a length of material such as chart paper around the pipe aligning the edges of the paper precisely at the overlap With the edge of the chart paper being parallel then either edge describes a circumference around the pipe that is perpendicular to the pipe axis BISECTING THE CIRCUMFERENCE Mark the chart paper exactly where it overlaps Then after removing the paper from the pipe fold the measured length in half keeping the edges parallel The fold line now marks a distance exactly half way around the pipe Put the paper back on the pipe and use the fold line to mark the opposite side of the pipe B 6 Transducer Cables The transducers are connected to the electronics via 50ohm coaxial cables and TNC connectors The total length of the cable be up to a maximum of 200 mteres B 7 Keypad All data is entered for set up and calibration via the front panel keypad Keys eTo give a NO answer and scroll through listed options press SCROLL eTo select options store data and move on to the next option press ENTER lf data has been incorrectly entered press Y until the display is clear then re enter the data correctly Restart Key The RESTART key can be pressed at any point in the program and will take the instrument back to the opening display Press SCROLL to enter the password 2000 and reprogram the instrument If the instrument has already been measur ing flow
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