TFM-LI, TFM-LP, TFP-LI & TFP-LM Manual
Contents
1. Check electrical connections see section B4 and ensure connector is correctly plugged in Allow unit to dry out in a dry environment Unit must be returned for repair see Section D3 Contact Dwyer Customer Service for assistance Use higher flow rates Calculate the flow reading error offset as explained in section C6 C7 Remove the entrapped air see section C2 Unit must be returned for repair see Section D3 F 20 TF L pg 28 of 30 Symptom Flow indication is not linear and output too low at lower flows Flow indication b ounces or fluctuates Flow indication is fixed at one value Possible Cause Attempting to measure flows below the specified minimum for the unit Liquid is too viscous Entrapped air or gas Mechanical sensor assembly damaged Flow is actually fluctuating Not using the fittings supplied by the manuatacturer Entrapped air or gas Turbulence in tubing or sensor Fluctuating input power Mechanical sensor assembly damaged The maximum rated flow for the unit is being exceeded Output circuits may be damaged Method of Correction Use higher flow rates Best results are obtained with liquids that have a viscosity of 10cS or less Contact Dwyer Customer Service for further information Remove entrapped air see section C2 Unit must be returned for repair see Section D3 Correct flow source to obtain steady flow Use th2. Signal outputs may be obtained at flow rates below the minimum specified for your unit The amount of flow that may be measured below the minimum specified varies from unit to unit Zero Adjustments It is impossible for there to be any zero drift so zero adjustments are never required Recalibration The calibration of the flow sensor may be easily verified using empirical methods It should be noted that the use of empirical methods outside a certified calibration laboratory is subject to inaccuracy and error These methods should only be used to gain an indication of a sensor s performance Please contact Dwyer Customer Service if accurate certitied recalibration is required A typical empirical calibration check may be carried out as follows Carefully adjust the flow rate so that the maximum output signal is obtained With the flow rate constant liquid flowing through the unit should be gathered in a container over a timed interval The total volume flowed over the timed period should then be measured using a measuring cylinder The actual flow rate in the same units as the flow sensor calibration certificate may then be calculated The actual maximum flow rate should then be compared to the specified maximum flow rate to determine the error in calibration For example For a flow range of 20 200ml min with a 0 5VDC output With a constant flow and constant 5VDC output the actual volume measured over 30 seconds was 102ml
3. Therefore the actual flow rate is 102 30 x 60 204ml min The error is therefore 204 200 4ml min or 2 F 20 TF L pg 16 of 30 A second empirical check should be made at a flow rate below the maximum for the unit e g at 50 of full scale The calculated percentage error at this flow should then be compared to the error at maximum flow If there is a big difference in the percentage errors then the flow signal is no longer linear and the unit may be damaged consult Dwyer Customer Service Once it has been determined that the linearity is still acceptable and the error in flow reading at maximum flow has been calculated there are 3 options i Minor adjustments to actual calibration of the flow sensor may be made by turning the gain potentiometer on the side of the unit For example For a unit with a flow range of 13 100ml min and a 0 5VDC output With a constant flow and constant 5VDC output the actual volume measured over 60 seconds was 103ml The correct voltage output for a flow of 103 ml min is 5 100 x 103 5 15 V With the flow at a constant 103 ml min the gain potentiometer should be carefully adjusted so that a voltage output reading of 5 15 V is obtained If the unit cannot be suitably adjusted please contact Dwyer Customer Service Pulse outputs are not adjustable Adjusting the Gain Pofentiometer Using a Flat Head Screwdriver TFP LP Series shown other models similar F 20 TF L p
4. Fitting Material Standard Stainless Steel Fitting Material Optional Kynar PVDF Acetal Brass Kynar PVDF Stainless Steel Brass Compatible Liquids Low viscosity ideally lt 10 5 Translucent or transparent Minimum amount of entrapped air or gas 0 5VDC Output Signal Standard Minimum 2 5 KQ load Pulse Output Signal 7 5VDC peak buffered square wave Typically 0 400Hz 3 0 Full Scale accuracy Typical Power Consumption 12 VDC 35 mA 11 5 15 VDC Typically lt 1 second for 63 of final value Reliability 100 000 hours MTBF Certifications CE Approved 89 336 EEC EN 55011 amp EN 50082 1 73 23 EEC Low Voltage Directive 1 Specifications from 10 100 of rated flow Linearity is best fit straight line All calibrations performed with deionized water unless otherwise stated on calibration certificate F 20 TF L pg 21 of 30 x Mode Display 3 5 Digit Non Backlit LCD 0 39 10mm high digits Accuracy including linearity 1 0 Full Scale Repeatability 0 2 Full Scale Pressure Rating 100 psig 500 psig 6 8 bar 34 5 bar Temperature Rating Operating Range 5 to 55 C Storage Range 0 to 70 C Temperature Sensitivity 0 2 F S or less per Wetted Materials Ryton 316 Stainless Epoxy Ryton Glass Epoxy Sapphire Glass Sapphire Fitting Material Standard Stainless Steel Optional Fitting Materials Acetal Kynar PVDF brass or stainless steel Compatible Liquid
5. at any time DAMAGE WILL RESULT F 20 TF L pg 10 of 30 d Electrical Connections Units with Both Voltage and Pulse Outputs TFP LP amp TFM LP Series The cable assembly should be connected to the sensor as detailed in section above Power should not be applied to the sensor until all the connections have been made and checked Wiring Schematic For Voltage and Pulse Oufput DC Power Source Black Wire FLOW SENSOR Voltage Signal Data Acquisition system White Wire Pulse Signal Data Acquisition Positive system Green Wire The RED wire should be connected to the Positive of the power source The BLACK wire should be connected to the Negative Ground of the power source The WHITE wire provides the signal output and should be connected to the positive terminal of the display data acquisition system or voltmeter with an impedance of greater than 2500Q Ohms The GREEN wire T option only is the pulse output and should be connected to the Positive terminal of the data acquisition system with an impedance of greater than 10KQ Ohms The PULSE and VOLTAGE output may be monitored simultaneously CAUTION Avoid high voltage static discharges to any of the connections Do not short the input output signal wires or allow them to contact the power wires at any time DAMAGE WILL RESULT F 20 TF L pg 11 of 30 e Using a 0 5VDC Output Power Adapter Package An opti
6. found in Appendix G Page 27 of this manual b Connecting the Cable Assembly The connector on the end of the cable assembly should be pushed into the mating socket on the sensor taking care to ensure that it is the correct way Connecting the Cable Assembly All models similar Electrical Connections are made to the cable assembly as detailed in the following sections F 20 TF L pg 9 of 30 c Electrical Connections Voltage Output Units TFP LI amp TFM LI Series The cable assembly should be connected to the sensor as detailed in section A b above Power should not be applied to the sensor until all the connections have been made and checked Electrical connections should be made as follows Wiring Schematic For Voltage Output Units 8 DC Power DC Source Black Wire FLOW SENSOR Negative Data Acquisition Positive White Wire The RED wire should be connected to the Positive of the power source The BLACK wire should be connected to the Negative Ground of the power source The WHITE wire provides the signal output and should be connected to the positive terminal of the display data acquisition system or voltmeter with an impedance of greater than 2500Q Ohms The GREEN wire if present is NOT used CAUTION Avoid high voltage static discharges to any of the connections Do not short the input output signal wires or allow them to contact the power wires
7. of the unit may be effected and leaking may occur If different fittings are required please contact Dwyer Customer Service for assistance When connecting the sensor to the tubing a wrench should be used to stop the fitting rotating in the sensor body Take care not to over tighten the fittings or leaking may occur Connecting and tightening the Fittings F 20 TF L pg 7 of 30 CAUTION DO NOT over tighten the fittings into the sensor body Excessive force may damage the sensor body and will NOT be repaired under warranty The flow direction for the unit is clearly marked on the label Do not reverse the flow direction or the unit will not function Close Up of Label Showing Flow Directions All models similar For the best results precautions should be taken to minimize the amount of turbulence in the flow stream Avoid valves fittings curves in the tube and changes in the internal diameter or any other restrictions close to the inlet of the sensor The tubing ID should be as large as possible and preferably not smaller than the ID of the fittings installed on the sensor For 0 2 2 0 L min units a 10 cm straight length of tube before the sensor is recommended For higher flow range units 0 5 5 0 L min and 1 0 10 0 L min a 20 cm straight length of tubing before the sensor is recommended If this is not possible it is recommended that straight lengths between all connections on the inlet side of the sensor are as lon
8. Manual F 20 TF L June 2008 Revision 1 www dwyer inst com MODEL TFP LI MODEL TFM LI MODEL TFP LP MODEL TFM LP Flow Sensors and Flow Meters For Liquids Installation Manual amp Operating Instructions READ THIS MANUAL COMPLETELY BEFORE ATTEMPTING TO CONNECT OR OPERATE YOUR FLOW SENSOR FAILURE TO DO SO MAY RESULT IN INJURY TO YOU OR DAMAGE TO THE FLOW SENSOR oe ee TABLE OF CONTENTS u an ua n lieu aa e 3 J B O uma h 3 2 Product Overview And Principle Of 3 an aan a 5 l General Considera ons uyu Au uuu 5 2 Mounting The Flow Sensor Or Flow Meter S Tobing COMMECH OMG usu u ESSA 7 IEG 9 8 OVERVIEW eon 9 b Connecting A Cable 6 9 c Electrical Connections Voltage Output Units TFP LI amp TFM LI Series 10 d Electrical Connections Units With Both Voltage amp Pulse Outputs Se TEMELRE SCS 11 e Using a 0 5VDC Output Power Adapter 12 OBEROI O ED O 13 SIO O O Da 13 Earp T Ga a 13 Flow RECOINGS uu yz upas uu Sma as erences 13 DG A
9. ate Units are calibrated using deionized water as the reference media F 20 TF L pg 13 of 30 a O 5VDC Analog Outputs By monitoring the voltage output signal it is possible to determine the flow rate of the liquid Units are configured so that an output signal of 5 0VDC is provided when the maximum flow i e Full Scale flow is passing through the unit The output signal is linear and scalable enabling calculation of flow rates within the sensor s range For example For a flow range of 50 500ml min At 500ml min the output signal would be 5VDC If the output signal were 3 5VDC then the flow rate would be 500 5 3 5 350ml min If the maximum flow rate is exceeded non linear and inaccurate readings will result b Pulse Outputs By monitoring the Pulse output frequency it is possible to determine the flow rate of the liquid The pulse frequency for maximum flow through the unit i e full scale flow is detailed on the calibration certificate This differs from unit to unit This output is approximately linear and scalable within the sensor s range For example For a flow range of 1 0 10 01 The calibration certificate gives the following At 10 0 min the pulse output signal is 312Hz At 5 01 the pulse output signal is 150Hz At 2 01 the pulse output signal is 58Hz If the output signal 120Hz then the flow rate would be 5 0 150 x 120 4 0 min using the closest calibration
10. e supplied fittings Remove entrapped air see section C2 Straighten the inlet tubing or lengthen it to at least 6 150mm see section B3 Correct the power source or change to a regulated supply Unit must be returned for repair see Section D3 Reduce the flow Unit must be returned for repair see Section D3 F 20 TF L pg 29 of 30 Warranty After final installation of the flow meter no routine maintenance is required A periodic check of system calibration is suggested The series TFP LP TFP LI TFM LP and TFM LI are not field repairable and should be returned if repair is needed field repair should not be attempted and may void the warranty Be sure to include a brief description of the problem plus any relevant application notes Contact Dwyer Customer Service to receive a return goods authorization R M A number before shipping Contacting Dwyer Mailing address Dwyer Instruments Inc P O Box 373 102 Indiana Hwy 212 Michigan City IN 46361 U S A Phone 800 872 9141 or 219 879 8000 Fax 219 872 9057 Email tech dwyer inst com Website www dwyer inst com For repairs and or return information please contact Dwyer Customer Service any of the ways shown above F 20 TF L pg 30 of 30
11. g 17 of 30 ii Adjust the scaling endpoints in the display or data acquisition system For example For a flow range of 50 500ml min with 0 5VDC output With a constant flow and constant 5VDC output the actual volume measured over 60 seconds was 405ml Therefore the actual flow rate is 405 60 x 60 405ml min The display or data acquisition system may now be configured as follows 0 VDC Zero flow 5VDC 405ml min iii Apply the error factor to each flow reading taken For example For a flow range of 0 2 2 0 min connected to a display With a constant flow rate of 2 0 l min on the display the actual volume measured over 20 seconds was 0 7 Therefore the actual flow rate is 0 7 20 x 60 2 1 min The error is therefore 2 1 2 0 0 1 l min or 5 If the display shows an uncorrected flow rate of 1 4 min then Corrected flow rate Uncorrected flow rate error Corrected flow rate 1 4 5 1 47 l min F 20 TF L pg 18 of 30 7 Calibrating Units for Different Liquids The TF Series for liquids will operate with most translucent liquids subject to compatibility of the wetted parts Best results are obtained with low viscosity less than 10 centistokes liquids For information regarding higher viscosity liquids contact Dwyer Customer Service Units are calibrated with deionized water as the reference media Using other liquids will affect the calibration The amount of calibration e
12. g and electrical connections Once correct installation is verified switch on the power Entrapped Air or Gas There may be a lot of air or gas trapped in your sensor after installation This will usually escape the unit when flow within the range of the unit is first started CAUTION The system should be primed with liquid and flow started gradually This will prevent trapped air or gas from being forced through the sensor at a high velocity that may damage the sensor If gas remains entrapped in the unit it may be necessary to elevate the outlet tubing above the inlet of the sensor This should enable the trapped gas to escape the unit The sensor may be returned to its original position once all the gas has escaped If elevating the outlet tubing does not work block or pinch the outlet tube whilst there is flow in the system After approximately 5 seconds release the restriction to allow normal flow Doing this will build up pressure in the flow path that when released will help remove the entrapped gas Repeat this until the entrapped gas is removed from the unit Flow Readings TFP LP and TFM LP Series sensors provide a 0 5VDC and pulse output proportional to the flow rate The TFP LI and TFM LI Series feature an integral display that provides a local flow reading and a O 5VDC analog output Each flow sensor is factory calibrated for a specific flow range The flow range is shown on the unit s label and calibration certific
13. g as possible and 90 degree fittings with a large enough ID are used instead of curves in the tubing Electrical Connections CAUTION Incorrect wiring may cause severe damage to the unit Applying an AC voltage 115VAC or 230VAC directly to the unit will cause damage Read the following instructions carefully before making any connections F 20 TF L pg 8 of 30 a Overview The TFP LP and TFM LP series provide a 0 5VDC and pulse output proportional to the flow rate This output may be connected to a display data acquisition system or voltmeter The TFP LI and TFM LI feature an integral display that provides a local flow reading These units also have a O 5VDC analog output available If required this may be connected to another display data acquisition system or voltmeter A stable D C power supply is required to operate the unit The voltage and current requirements depend on the configuration of the unit Full details may be found in the Specifications section of this manual Connecting wires should be as short as possible to avoid voltage drops Twisted 2 pair conductor cable should be used if the length of the power wires is to be longer than 1 meter Units are supplied with an integral 4 pin connector Connections to the unit are made using a mating cable assembly or power adapter package as detailed in the following sections parts 4 b to 4 e of this manual A connector pin and wire color cross reference may also be
14. ire Color Cross Reference End On View of Connector Socket and Connector 0000 View of Connector End On View of Socket on Sensor Connector on Cable Assembly Standard Units Cable Wire Color Voltage Voltage amp Pulse TFP LI amp TFM LI TFP LP amp TFM LP Block Signol amp Power Signol amp Power Negative Ground Negative Ground Voltage Output Voltage Output Hu F 20 TF L pg 27 of 30 H Troubleshooting Guide Symptom Unit Leaks No output signal or flow indication Flow reading accuracy is outside the specification Possible Couse Fittings not tight enough Sensor assembly cracked No power or low power No flow passing through unit Output shorted or overloaded Improper connection Moisture on internal electronics Output circuitry damaged Liquid not translucent enough Attempting to measure flows below the specified minimum for the unit Liquid has a different viscosity and or specific gravity than water at 20 C Entrapped air or gas Mechanical sensor assembly damaged Method of Correction Tighten fittings see section B3 Unit must be returned for repair see Section D3 Apply correct power Display or output should read zero if there is no flow Increase the flow rate until a reading is obtained Do not exceed the specified maximum flow Check electrical connections see section B4
15. it decreases exponentially with decreases in flow rate Pressure Drop vs Percentage of the Full Scale Rated Flow may vary 10 of indicated psid 12 0 8 0 7 10 0 6 8 0 5 5 5 m oO 6 04 A g a 4 0 2 2 0 1 0 0 10 20 30 40 50 60 70 80 90 100 of rated flow 100 1000 ml min Units All Other Ranges F 20 TF L pg 5 of 30 To calculate the pressure drop at a certain flow rate use the formula PD YourFlow MaxFlow x PD PD Pressure drop at YourFlow YourFLow flow rate ml min or l min MaxFlow 100 rated flow for the sensor in same units as YourFlow Pressure drop at 100 rated flow see chart above If the pressure available for the flow sensor is BELOW the pressure drop at the required flow then flow through the unit will not be possible For example You have a sensor with a 50 500ml min flow range and want to know the pressure drop or minimum differential pressure required at 300ml min According to the chart above the pressure drop at 100 of flow is approx 1Opsi Using the formula above PD 300 500 x 10 3 6 Therefore at 300ml min the minimum required differential pressure for this unit is 3 6 psid This means that if the available pressure is below 3 6psid then flow through the unit may not be possible Pressure drop through a system is cumulative If the total pressure drop across all the co
16. mponents in a system exceeds the minimum pressure available then flow will not be possible For example A system has a pressure of 30 4Opsi There are several components and the sum of their pressure drops at the required flow rate is 32psid If the system is operating at 30psi flow would not be possible as the total of the pressure drops would be greater than the pressure available The system will only operate if the system pressure is above 32psi If there is any possibility that there may be bubbles or entrapped gas in the system then the outlet tubing should be elevated above the inlet port This will enable any gas that may become entrapped in the unit to escape see section C2 for details of how to remove entrapped air or gas Mounting the Flow Sensor or Flow Meter The TF Series of Flow Sensors and Flow Meters have no particular installation requirements so may be mounted in any convenient position It is recommended that units be fixed to a suitable substrate with 4 screws using the two mounting holes provided F 20 TF L pg 6 of 30 Mounting The Sensor Mounting hardware not included with sensor Tubing Connections CAUTION DO NOT FLOW ANY GAS THROUGH A LIQUID FLOW SENSOR OR FLOW METER THIS WILL DAMAGE THE MICRO TURBINE ASSEMBLY AND VOID THE WARRANTY All tubing must be clean and without crimps burrs or scratches Only use the fittings factory installed on the unit If the fittings are removed the calibration
17. n minimizes zero drift while maintaining fast response and linear outputs with virtually no maintenance k f Wiss ADVANCED Ll ELECTRONICS INFARED LED AND PHOTODIODE Patented technology measures flow using a miniature turbine wheel similar in size to a U S dime 16 mm diameter 0 75 mm thick The micro turbine wheel is supported on a very small sapphire shaft that is held in position by two sapphire bearings The micro turbine assembly is so light that it virtually floats in the liquid This relieves force on the bearings and almost eliminates wear As flow passes through the flow sensor a precision machined nozzle directs the fluid onto the very small teeth of the micro turbine wheel This causes the wheel to spin at a speed proportional to the flow rate The micro turbine wheel has alternating white and black sections evenly spaced on one side of the wheel An infrared light beam is directed onto the wheel As the wheel rotates the infrared beam is reflected off each white section The reflected beam is detected by a phototransistor that converts the reflections into electrical pulses As the wheel spins faster the pulse rate increases Processing circuitry provides analog and or pulse output that are linearly proportional to the flow rate When the wheel stops under zero flow conditions no pulses are generated Consequently zero drift is not possible and zero adjustments are neve
18. nGgleG OUI DUIS uu sistas teva tak sqa 14 DB PULE OUPO uyu hailed aha OLAS 14 c Units with an Integral Disploy 14 4 Operating at Flow Rates Outside the Calibrated Flow Range 15 a Flows Above the Maximum Rated Flow 15 b Flows Below the Minimum Rated 16 Cow AdU EASE 16 551 16 7 Calibrating Units for different Liquids 19 Maintenance And Product Care 19 eG reas art essere u cae vaca 19 2 Cleaning ana gaa 20 Returning Units For Repair Or Recalibration 20 DOS CINCOM ONS Ses Qua uui 21 DIMERS ONS asa 23 Connector Pin And Wire Color Cross Reference 27 Trouble Shoonng Golde uuu u u suu OA Ls SAE 28 Wan aniy ESSA ORS EO SSG 30 COTTA DWYS i oe SL SS 30 F 20 TF L pg 2 of 30 A Introduction 1 Unpacking All sensors are suitably packaged to prevent damage during shipping If ex
19. onal 0 5VDC Output Power Adapter Package is available for use with the TF Series This consists of a power source 1 15VAC or 230 and cable assembly with pig tail soldered wire ends for the signal output This should be assembled as shown in the following diagram Connecting the Power Adapfer to the Flow Sensor All other models similar Electrical connections to the cable assembly should be made as follows YELLOW WIRE This provides the 0 5VDC signal output and should be connected to the positive terminal of the display data acquisition system or voltmeter with an impedance of greater than 2500Q Ohms GREEN WIRE For Pulse output units the green wire provides the pulse output and should be connected to the positive terminal of the data acquisition system with an impedance of greater than Ohms WHITE WIRE This is the signal negative and should be connected to the negative ground terminal of the voltmeter display or data acquisition system CAUTION Avoid high voltage static discharges to any of the connections Do not short the output signal wires or allow them to contact the power wires at any time DAMAGE WILL RESULT F 20 TF L pg 12 of 30 C Operation CAUTION USE WITH LIQUIDS ONLY FLOWING GAS OR AIR THROUGH YOUR FLOW SENSOR WILL DAMAGE THE MICRO TURBINE ASSEMBLY THIS TYPE OF DAMAGE WILL NOT BE REPAIRED UNDER WARRANTY Start Up Before applying power to the unit check all tubin
20. point c Units With an Integral Display The TFP LI and TFM LI Series feature an integral digit LCD display This is configured to read in ml min for flow ranges up to 50 500 ml min and in l min for all other flow ranges The display will only operate if power is applied to the unit F 20 TF L pg 14 of 30 Flow readings may be taken directly from the display or by monitoring the 0 5VDC analog output provided by using a cable assembly or power adapter package see above LCD Flow Display TFM LI Series Shown other models similar 4 Operating at Flow Rates Outside the Calibrated Flow Range CAUTION If the flow through the unit exceeds 120 of the maximum rated full scale flow the unit may be damaged This type of damage will not be repaired under warranty Flow measurement is only accurate within the calibrated flow range for the unit This is detailed on the calibration certificate The unit will still operate to some degree outside this flow range Results obtained when operating outside the specified range of the unit are not accurate but may be considered repeatable a Flows Above the Maximum Rated Flow If the flow rate is above the maximum rated or full scale flow the unit will still operate and provide an output signal proportional to the flow rate Flows must not exceed 120 of the maximum rated flow or the unit may be damaged F 20 TF L pg 15 of 30 b Flows Below the Minimum Rated Flow
21. r required Every unit is supplied with a calibration certificate detailing the results obtained during calibration Units are calibrated using deionized water as the reference media Flowing liquids with different specitic gravities or viscosities may affect the calibration F 20 TF L pg 4 of 30 B Installation CAUTION Do not flow any gas through a liquid flow sensor This may damage the micro turbine assembly and void the warranty Do not exceed the pressure temperature or power operating ranges detailed in the Specifications section of this manual Dwyer Instruments shall not be liable for any damage or injury caused by incorrect operation of their products General Considerations It is recommended that a safety shut off valve be installed upstream of before the sensor All wetted parts should be checked for compatibility with the liquid to be used If there are any incompatibilities e g highly corrosive liquid then the unit may be damaged or fail prematurely Such damage will not be repaired under warranty Units should be installed in a clean dry environment with an ambient temperature that is as stable as possible Avoid areas with strong magnetic tields strong air flows or excessive vibration If the liquid to be used may contain particles larger than 25 microns then a filter 25 microns or less should be installed upstream of before the unit The required differential press or pressure drop across the un
22. reversed to assist flushing Under no circumstances should gas or air be flowed through the unit This will cause severe damage Returning Units for Repair or Recalibration To return units for repair or recalibration please contact Dwyer Customer Service A Return Material Authorization RMA Number will then be issued to enable the unit to be returned Please note that no returns will be accepted unless the RMA number is clearly indicated on the outside of all packages Once the unit has been received it will be evaluated and the cost of any repairs recalibration determined Once agreement has been received to pay for all the necessary work the unit will be processed and returned No charges will be made for Warranty Repairs Dwyer Customer Service may be contacted as follows Mailing address Dwyer Instruments Inc P O Box 373 102 Indiana Hwy 212 Michigan City IN 46361 U S A Phone U S A 800 872 9141 or 219 879 8000 Fax U S A 219 872 9057 Email tech dwyer inst com Website www dwyer inst com F 20 TF L pg 20 of 30 Specifications Analog Signal Accuracy 1 0 Full Scale including linearity Repeatability 0 2 Full Scale Pressure Rating 100 psig 500 psig 6 8 bar 34 5 bar Temperature Rating Operating Range 5 to 55 C Storage Range O to 70 C Temperature Sensitivity 0 2 F S or less per C Wetted Materials Ryton 316 Stainless Epoxy Ryton Glass Epoxy Sapphire Glass Sapphire
23. rror will depend on the characteristics of the liquid being flowed The error in flow reading or calibration should be calculated and utilized as detailed in section 6 above D Maintenance and Product Care 1 General CAUTION Do not disassemble your flow meter or flow sensor for any reason If the unit appears to be malfunctioning please contact Dwyer Customer Service The TF Series of flow sensors require no periodic maintenance if used within the recommended specifications The next recommended recalibration date is stated on the calibration certificate supplied with the unit Please contact Dwyer Customer Service for further information Inlet filters should be periodically checked and cleaned replaced as necessary Regularly check all electrical and process connections for damage or deterioration If the sensor is to be stored keep both the inlet and outlet ports sealed Do not store a sensor with any chemical other than water or air inside it over an extended period of time Prolonged exposure to chemicals other than water may lead to precipitation or corrosion F 20 TF L pg 19 of 30 Cleaning and Flushing If there is a buildup of deposits or residues from the measured chemicals it may be necessary to clean or flush the unit This should be done by flowing clean particle free water through the unit at a flow rate pressure and temperature within the specifications of the unit If necessary flow may be
24. s Low viscosity ideally lt 10 5 Translucent or transparent Minimum amount of entrapped air or gas 0 5VDC Output Signal Standard Minimum 2 5 KQ load Typical Power Consumption 12 VDC 35 mA 11 5 15 VDC Typically lt 1 second for 97 of final value Reliability 100 000 hours MTBF Certifications CE Approved 89 336 EEC EN 55011 amp EN 50082 1 73 23 EEC Low Voltage Directive 1 Specifications from 10 100 of rated flow Linearity is best fit straight line All calibrations performed with deionized water unless otherwise stated on calibration certificate F 20 TF L pg 22 of 30 Dimensions ALL DIMENSIONS IN INCHES MILLIMETERS IN BRACKETS Model TFP LP For Liquids 1 4 Acetal Fittings Shown F 20 TF L pg 23 of 30 Model TFM LP For Liquids 1 4 Stainless Fittings Shown 5 TT mr T mi a L I gt lt ml 1 5 37 21 80 20 32 51 69 2X 125 THRU _ 188 130 2 035 F 20 TF L pg 24 of 30 Model TFP LI For Liquids 1 4 Acetal Fittings Shown 6 35 Ln i 2 035 51 69 2X 136 THRU 86 01 N wor ON L F 20 TF L pg 25 of 30 Model For Liquids 1 4 Stainless Fittings Shown b9 0b J 5 1 u 97 0 LEP it 69 s Sh 69 TS SEU fT ST 09 bb TO OET 4 88r BT SET F 20 TF L pg 26 of 30 G Connector Pin amp W
25. ternal damage is noted upon receipt of the package please contact fhe shipping company immediately Dwyer Instruments is not liable for damage to the device once it has left the manufacturing premises Open the package from the top taking care not to cut too deeply into the package Remove all the documentation and contents Take care to remove all the items and check them against the packing slip The products should also be checked for any concealed shipping damage If any shortages or damage is noted please contact the shipping company and or Dwyer Instruments to resolve the problem Typical Contents of Box Sensor Calibration Certificate amp Instruction Manual Model TFP LP shown other models similar g _ CAUTION Take care not to drop your sensor or subject it to sudden impact Read the installation section of this manual before providing power or tubing connections to the unit Any damage caused by improper installation or careless handling will not be repaired under warranty see limited warranty on page 30 for more details 2 Product Overview and Principle of Operation TF Series Flow Meters and Flow Sensors for liquids are capable of measuring flows as low as 13 100 ml min or as high as 1 0 10 0 l min Highly repeatable results are achieved using a patented Pelton Turbine F 20 TF L pg 3 of 30 Wheel flow sensor design This proven desig
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