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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 GREYLINE’s technical
support department to discuss specifics of your application.
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 with
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 GREYLINE display
or Btu meter (if ordered).
Confirm that the flow meter serial number matches the GREYLINE 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 GREYLINE display or Btu meter. If in
doubt, contact GREYLINE 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.
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. Measure DC frequency (Hz) from GREEN (+) to
YELLOW (-). Also measure DC volts on same wires. Five to 7 VDC 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.)
10. 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)
11. Compare various output
signals to each other and to
the flow rate displayed by the
control system.
Compare the flow rates calculated in steps 9 and 10 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 GREYLINE with any questions.
4.2 START-UP AND COMMISSIONING
