Dwyer TFM-LP User Manual

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

F-20-TF-L, pg. 10 of 30 c) Electrical Connections – Voltage Output Units (TFP-LI & TFM-LI Series) The cable assembly should be connected to the

F-20-TF-L, pg. 11 of 30 d) Electrical Connections –Units with Both Voltage and Pulse Outputs (TFP-LP & TFM-LP Series) The cable assembly should b

F-20-TF-L, pg. 12 of 30 e) Using a 0-5VDC Output Power Adapter Package. An optional 0-5VDC Output Power Adapter Package is available for use with th

F-20-TF-L, pg. 13 of 30 C. Operation CAUTION: USE WITH LIQUIDS ONLY. FLOWING GAS OR AIR THROUGH YOUR FLOW SENSOR WILL DAMAGE THE MICRO-TURBINE ASS

F-20-TF-L, pg. 14 of 30 a) 0-5VDC Analog Outputs By monitoring the voltage output signal it is possible to determine the flow rate of the liquid. Uni

F-20-TF-L, pg. 15 of 30 Flow readings may be taken directly from the display or by monitoring the 0-5VDC analog output provided by using a cable asse

F-20-TF-L, pg. 16 of 30 b) Flows Below the Minimum Rated Flow. Signal outputs may be obtained at flow rates below the minimum specified for your unit

F-20-TF-L, pg. 17 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 calculate

F-20-TF-L, pg. 18 of 30 ii.) Adjust the scaling endpoints in the display or data acquisition system. For example: For a flow range of 50-500ml/min w

F-20-TF-L, pg. 19 of 30 7. Calibrating Units for Different Liquids The TF Series for liquids will operate with most translucent liquids subject to co

F-20-TF-L, pg. 2 of 30T A B L E O F C O N T E N T SA. Introduction ...

F-20-TF-L, pg. 20 of 30 2. Cleaning and Flushing If there is a buildup of deposits or residues from the measured chemicals it may be necessary to cle

F-20-TF-L, pg. 21 of 30 E. Specifications Model TFP-LP Model TFM-LP Analog Signal Accuracy (including linearity) ±1.0% Full Scale1 Repeatability

F-20-TF-L, pg. 22 of 30 Model TFP-LI Model TFM-LI Display 3.5 Digit Non Backlit LCD, 0.39” (10mm) high digits Accuracy (including linearity) ±1

F-20-TF-L, pg. 23 of 30 F. Dimensions ALL DIMENSIONS IN INCHES (MILLIMETERS IN BRACKETS) Model TFP-LP For Liquids 1/4” Acetal Fittings Shown

F-20-TF-L, pg. 24 of 30 Model TFM-LP For Liquids 1/4” Stainless Fittings Shown

F-20-TF-L, pg. 25 of 30 Model TFP-LI For Liquids 1/4” Acetal Fittings Shown

F-20-TF-L, pg. 26 of 30 Model TFM-LI For Liquids 1/4” Stainless Fittings Shown

F-20-TF-L, pg. 27 of 30 G. Connector Pin & Wire Color Cross Reference End On View of Connector Socket and Connector Standard Units: Pin

F-20-TF-L, pg. 28 of 30 H. Troubleshooting Guide Symptom Possible Cause Method of Correction Unit Leaks. Fittings not tight enough. Sensor assem

F-20-TF-L, pg. 29 of 30 Symptom Possible Cause Method of Correction Flow indication is not linear and output too low at lower flows Attempting to m

F-20-TF-L, pg. 3 of 30 A. Introduction 1. Unpacking All sensors are suitably packaged to prevent damage during shipping. If external damage is note

F-20-TF-L, pg. 30 of 30 I. Warranty After final installation of the flow meter, no routine maintenance is required. A periodic check of system calib

F-20-TF-L, pg. 4 of 30 Wheel flow sensor design. This proven design minimizes zero drift while maintaining fast response and linear outputs with virtu

F-20-TF-L, pg. 5 of 30 B. Installation CAUTION: Do not flow any gas through a liquid flow sensor. This may damage the micro-turbine assembly and void

F-20-TF-L, pg. 6 of 30 To calculate the pressure drop at a certain flow rate use the formula PD = (YourFlow / MaxFlow)2 x PDmax PD = Pressure drop a

F-20-TF-L, pg. 7 of 30 Mounting The Sensor (Mounting hardware not included with sensor) 3. Tubing Connections CAUTION: DO NOT FLOW ANY GAS THROUGH

F-20-TF-L, pg. 8 of 30 CAUTION: DO NOT over tighten the fittings into the sensor body. Excessive force may damage the sensor body and will NOT be rep

F-20-TF-L, pg. 9 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 c