Onicon FB-3500 Series Manuel d'utilisateur télécharger pdf (Page 24)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]

FB-3500 Bi-Directional Insertion Electromagnetic Flow Meter Manual 05/14 - 0718-3 Page 24

4.2 START-UP AND COMMISSIONING

Please read the entire procedure before proceeding. A worksheet for checking off the following

steps and recording measured values is located on the next page.

1. Conrm ow meter

location. Conrm adequate

straight pipe run to achieve

desired results.

Is the meter located in the correct location as required by the plans?

Compare actual straight pipe upstream and downstream of the meter location to

recommended distances identied in this manual. Contact ONICON’s technical support

department to discuss specics of your application. If straight pipe run is very short,

consult factory PRIOR to installing the meter to discuss possibility of upgrade to an

F-3000 series in-line meter.

2. Conrm pipe size. Conrm that the meter is tagged for the pipe size in which it is installed. When in doubt,

measure the circumference of the pipe. Pipe O.D. = (circumference / 3.14) – (insulation

thickness x 2).

3. Conrm insertion depth and

orientation.

Each ow meter comes with an attached insertion gage and instruction tag. Ensure that

the meter is inserted to the correct depth and that the electronics enclosure is parallel to

the pipe with the arrow in the direction of ow.

4. Conrm control system

programming.

Conrm that the control system input point is properly congured for the analog range

(or scale factor) identied on the calibration tag & certicate.

5. Conrm connection to

correct ONICON display or

Btu meter (if ordered).

Conrm that the ow meter serial number matches the ONICON display or Btu meter

serial number (when ordered together).

6. Verify wiring before

connecting power.

Prior to connecting the power, verify that the wiring is correct as shown in this manual and/

or the additional wiring diagram provided with ONICON display or Btu meter. If in doubt,

contact ONICON for assistance before proceeding further.

7. Conrm correct supply voltage. Verify that 24 (±4) V is available.

8. Connect power. Wait approximately 45 seconds after power-on before proceeding further.

The following steps require ow in the pipe. Flow signal readings should be taken while holding the ow rate constant, if possible.

Otherwise, take the various output readings as quickly as possible.

9. Test ow direction indicator.

Conrm that ow direction

contact closure output

changes state when the ow

direction reverses.

Following the steps outlined in sections 3.3.1 of this manual, loosen the clamping nut, rotate

the enclosure 180° and conrm that the ow direction contact closure changes state.

Return the meter to its correct orientation in the pipe, reset the insertion depth and tighten

the clamping nut.

10. Measure and record

frequency output.

The frequency output signal is a 0-15 VDC pulsed output ranging up to 200 Hz and must

be measured with a multimeter. Measue DC frequency (Hz) from GREEN (+) to YELLOW

(-). Also measure DC volts on same wires. Five to seven is normal for a pulsating output.

Zero VDC indicates no output.

GPM = frequency in Hz X 60

meter factor in ppg (Refer to calibration tag for meter factor.)

11. Measure and record

analog or pulse outputs.

Current Output:

Voltage Output:

Scaled Output:

Refer to ow meter wiring diagram for wire colors for the various outputs available, based

on your

particular ow meter model. Use the following formulas to calculate ow rate from

measured analog signals:

GPM = (measured current in mA - 4) X Full Scale Analog Flow Rate

GPM = measured VDC X Full Scale Analog Flow Rate

Each contact closure = unit volume identied as “Scale Factor” (measure and record time

interval between contact closures)

12. Compare various output

signals to each other and to

the ow rate displayed by the

control system.

Compare the ow rates calculated in steps 10 and 11 to each other and to the ow

rate indicated by the control system. Refer to troubleshooting guide when readings are

inconsistent.

End of standard start-up and commissioning. Please contact ONICON at (727) 447-6140 with any questions.

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Onicon FB-3500 Series Manuel d'utilisateur Page 24

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