ONICON FB-3500 Series - Manual (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.
Confirm flow meter
location. Confirm 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 identified in this manual. Contact ONICON’s technical support
department to discuss specifics 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.
Confirm pipe size. Confirm 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.
Confirm insertion depth and
orientation. Each flow 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 flow.
4.
Confirm control system
programming. Confirm that the control system input point is properly configured for the analog range
(or scale factor) identified on the calibration tag & certificate.
5.
Confirm connection to
correct ONICON display or
Btu meter (if ordered). Confirm that the flow 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.
Confirm 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 flow in the pipe. Flow signal readings should be taken while holding the flow rate constant, if possible.
Otherwise, take the various output readings as quickly as possible.
9.
Test flow direction indicator.
Confirm that flow direction
contact closure output
changes state when the flow
direction reverses.
Following the steps outlined in sections 3.3.1 of this manual, loosen the clamping nut, rotate
the enclosure 180° and confirm that the flow 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 flow meter wiring diagram for wire colors for the various outputs available, based
on your
particular flow meter model. Use the following formulas to calculate flow rate from
measured analog signals:
GPM = (measured current in mA - 4) X Full Scale Analog Flow Rate
16
GPM = measured VDC X Full Scale Analog Flow Rate
10
Each contact closure = unit volume identified as “Scale Factor” (measure and record time
interval between contact closures)
12. Compare various output
signals to each other and to
the flow rate displayed by the
control system.
Compare the flow rates calculated in steps 10 and 11 to each other and to the flow
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.