Omega FTB500 Series Operator's Manual

Low flowrate meters.
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Manual
OPerator's
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Flowrate Meters
Low
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FTBSOO Series
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   Summary of Contents for Omega FTB500 Series

  • Page 1

    FTBSOO Series Flowrate Meters (i%%i OPerator’s Manual...

  • Page 2

    OMEGKj D.aaw.4 Taek,.l.#hm Servicing USA and Canada: Call OMEGA To Drive, Box 4047 Omega Stamford, CT 06907.0047 Telephone: (203) 359.1660 FAX: (203) 359-7700 Sales Service: l-800-826-6342 Customer Service: l-800-622-2378 Engineering Service: l-800-872-9436 TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA Servicing Europe: United Kingdom Sales and Distribution Center...

  • Page 3: Table Of Contents

    Viscosity Calibration and UVC Curves SECTION 2 INSTALLATION Unpacking Operation General Installation Wiring Layout for Interconnections Installation of the FTB500 Mini Flow Signal Conditioner SECTION 3 CALIBRATION Introduction Calibration Procedure To Confirm FTBSOO Signal Conditioner Offset Calibration of FTB500 Analog Output 3.4.1...

  • Page 4

    SECTION 1 INTRODUCTION DESCRIPTION OMEGA@ FTB500 Series Low Flowmeters offer extremely accurate low flow measurement of liquids and gases. They utilize a rotor whose motion is converted into a pulse output proportional to flow by a pickup coil. They come with an integral signal conditioner, powered by either 15-35 VDC or 115 VAC (optional) to provide amplified frequency and analog output.

  • Page 5

    THEORY OF OPERATION A simplified block diagram of the FTB500 Mini Flow Signal Conditioner is shown in Figure 1-I. SENSITIVITY TURBINE FLOWMETER= MAIN CHASSIS Figure l-l. The basic operation of the system is as follows: The frequency signal from the flowmeter is connected to the FTB500 with a twisted pair shielded cable.

  • Page 6

    A low-flow cutout feature is provided where the off- set signal is inhibited during no flow to prevent false outputs from being generated. The FTB500 Series Turbine Meter is a family of low flow rate measurement devices based on a pelton wheel-like rotor. The measured fluid is directed...

  • Page 7

    UN LINEARIZED OUTPUT FLOW RATE (GPM) Figure 1-2. FTBSOO Output Characterlstlcs Diagram LINEARIZED UNLINEARIZED 5 90 1.00 10 50 100 % OF MAX IMUM FLOWRATE Figure 1-3. Normalized FTBIOO Calibration Curve...

  • Page 8

    Over the linear flow range, the input/output characteristics takes the form of: Equation 1 Frequency = C, x Flowrate-C, FTB500 Series Turbine Meter requires the use of a linearization con- ditioner available in all OMEGA instrumentation. Accuracies of reading are typical after initial correction for offset. Better accuracies ap-...

  • Page 9: Section 2 Installation, Unpacking

    For such fixed viscosity applications the standard specifications usually apply. FTB500 Series Turbine Meter may be used over wide viscosity ranges, since the flowmeter has a unique, documented, Universal Viscosity Curve (abbreviated UVC) which is accurate to...

  • Page 10: Operation, General

    Perform any purging of piping with spool piece in place. Once completed, install the flowmeter and connect cabling to pickup coil. With the FTB500 Mini Flow Signal Conditioner properly installed and calibrated, verify the following performance. With the power ON and no flow through the flowmeter, there should be no pulse output from the unit.

  • Page 11

    The piping configuration immediately flowmeter is termed the meter run. METER RUN -In general, the meter run should be chosen to have the same inner diameter as the meter bore. A minimum of IO pipe diameters of straight pipe upstream and 5 pipe diameters downstream are required. Where this optimum line configuration can not be implemented, it is ad- visable to install a flow straightener properly positioned upstream of the flowmeter.

  • Page 12

    Suitable accessory models are available from the manufacturer. INSTALLATION OF THE FTB500 MINI FLOW SIGNAL CONDITIONER FTB500 should be placed in a convenient location with sufficient room for easy opening of the enclosure Refer to Figure 2-2 for the mounting draw- ing for the FTB500.

  • Page 13: Section 3 Calibration

    RETURN (STANDARD) SIGNAL PULSE OUTPUT COMMON 1-P OPTION) DC VOLTAGE INPUT 1234567 FTB500 IS CALIBRATION SIGNAL. TO INJECT THIS TEST SIGNAL, INSTALL A JUMPER FROM TERMINAL 8 TO TERMINAL 1. Figure 2-3. DC Input Installation TERMINAL BLOCK 1 F(TEBT) TERMINAL...

  • Page 14

    Ayy==+--~ Xl PICKUP COIL F(TEST) IIBVAC (NEUTRALS 50160 Hz INPUT FTB500 IS EQUIPPED WITH AN INTEGRAL CALIBRE \TlON SIGNAL. SIGNAL, INSTALL A JUMPER FROM TERMINAL 8 TO TERMINAL 1. Figure 24. 115VAC Input Installation Wiring Diagram TERMINAL BLOCK 1 TERMINAL...

  • Page 15: Introduction, Calibration Procedure

    CALIBRATION PROCEDURE Before calibrating the FTB500 flowmeter, analog outputs, be sure the response time adjustment potentiometer is turned fully clockwise for fastest response time (0.5 seconds nominal). This potentiometer is found inside the signal conditioner, inside the rectangular case, on the top printed circuit board, just beneath terminal I.

  • Page 16: Setup, Equations

    l7I CONFIRM FTBSOO SIGNAL CONDITIONER OFFSET 1. Connect frequency counter to the offset frequency test point of the unit. 2. Inject the TEST frequency and observe that the frequency equals 10 F(OS). For analog, go to Section 3.4. For pulse, continue to step 3. 3.

  • Page 17

    where: F(TEST) = test frequency used = offset frequency F(OSl F(MAX) = the flowmeter output frequency at at the reference condition at which the relation with F(MAX) was defined. K Factor = in units of readout, = varying component of analog output. For example, SPAN mA for 4 to 20 ZERO...

  • Page 18

    SET (SPAN). SECTION 4 MAINTENANCE INTRODUCTION OMEGA ’ s Flow Measurement_Systems are constructed to give a long ser- vice life. However, problems do occur from time to time and the following points should be considered for preventative maintenance and repairs.

  • Page 19

    WELO- F igure 4 S tandard Ba ll Bear ing Cu ta w ay D CORRECT OR IENTAT ROTOR WHEN LOOK DOWN FROM TOP FL OW - DETA IL OF ROTOR iagra...

  • Page 20

    FTB500 Flow m eter m ust be held in place by a vise. tation should be such that the threaded plug is facing upwards. Using a screwdriver and turning counter clockwise, break the seal and re move the plug. Using tweezers or needle nose pliers, slowly pull the insert out, while taking care not to da m age the shaft or lose the thrust stop.

  • Page 21

    COIL TO PICKUP ANALOG OUPUT COMMON PULSE OUTPUT COMMON FiTESTi PCA-112 PCA-115 11 COIL-1 ACIDC FTBSOO POWER SIGNAL SUPPLY CONDITIONER ANALOG OUTPUT I-II- Internal Wiring Figure 5-1.

  • Page 22

    This calibration is supplied separately. To test the FTB500, an internal 120 Hz test frequency has been provided. Refer to Section 3.2, Calibration Procedure Failure conditions are listed and the possible corrective actions are given to eliminate the observed problems.

  • Page 23

    LINEARIZE AND FLOW DRIVE, PLUG-IN CARD ‘/4 SLO BLO FUSES, POWER SUPPLY SECTION 7 ACCESSORIES DESCRIPTION w MS flare to n MNPT adaptor kit with 10” upstream and 5” downstream straight SS tubing (SENS) potentiometer NOTE 1 BOX PART NUMBER FTB500-ADP...

  • Page 24: Section 8 Specifications

    SECTION 8 SPECIFICATIONS INPUT POWER OPTION: INPUT METHOD: OFFSET FREQUENCY: THERMAL STABILITY: LOW FLOW ADJUSTMENT LOW FLOW INDICATION: ACCURACY: REPEATABILITY: MAX. PRESSURE DROP AT ICSTK: MAX. PRESSURE: FREQUENCY OUTPUT AT FULL SCALE- FLOW bP OPTION, REFER TO SECTION 1.2): ANALOG OUTPUTS CURRENT OUTPUT (STANDARD): ACCURACY: RANGE:...

  • Page 25

    An internal 20 turn adjustment on the PCA-II5 printed circuit card used to ad- just the equivalent offset frequency of the FTB500, 7 to 150 Hz. An internal adjustment on the PCA-115 printed circuit card which is factory set to turn off the offset frequency oscillator at no flow.

  • Page 26

    SPECIFICATIONS (Cont ’ d) SPAN: RESPONSE: SCALING FACTOR: A multiple turn adjustment potentiometer which is used to set the current/voltage output signal to the desired span cor- responding to mA equivalent flow range (i.e., 4 to 20 mA or 0 to 1OV cor- responding to O-100GPM).

  • Page 27

    Authorized Return (AR) number immediately upon phone or written request Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge. However, this WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of being damaged as a result of excessive corrosion;...

  • Page 28

    Where Do Find Everything Process Measurement and Control? OMEGA...Of Course! TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels m Wire: Thermocouple, RTD & Thermistor @’ Calibrators & Ice Point References m Recorders, Controllers & Process Monitors B Infrared Pyrometers PRESSURE/STRAIN FORCE Transducers &...

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