ONICON F-3100 Series - Manual (Page 34)

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F-3100 Flow Meter Manual 06/14 - 0670-7
Page 34
4.2 HELPFUL HINTS FOR START-UP AND COMMISSIONING
A step-by-step procedure and companion worksheet are located on the next two pages. Please
read all installation instructions and these helpful hints carefully before proceeding with
installation, start-up and commissioning.
1. ONICON flow meters are individually calibrated for a particular application. Be sure to
verify the pipe size and location.
2. The electronic sensing system will not work in air. The pipe must be full for proper
operation.
3. When measuring analog output signals, remember that currents (mA) must be
measured in series, while voltages are measured in parallel. If the 4-20 mA signal is
already connected to a control system, you must break the connection and measure the
signal in series.
4. When measuring frequency outputs in hertz, take your multimeter out of “autorange
mode” and manually set range for a voltage level above 15 VDC. This will prevent false
readings when signal is not present.
5. Never connect power to analog or frequency output signal wires. ONICON F-3100 Flow
Meters are not “loop powered” devices.
4.3 START-UP AND COMMISSIONING
Please read the entire procedure carefully before proceeding. Wiring instructions are located on
pages 21 - 24 of this manual. A worksheet for checking off the following steps and recording
measured values is located on the next page.
1.
Confirm flow meter location and
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.
2.
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 certificate.
3.
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).
4. 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.
5. Verify that the input voltage available
to power the meter is appropriate for
the meter version. (Check label inside
transmitter enclosure LV=Low voltage,
HV=High voltage. Low voltage: 10 - 63 VDC or 15 - 45 VAC 45/66 Hz, 300 mA maximum
High voltage: 90 - 265 VAC 45/66 Hz, 35 mA maximum
6. 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.
7. Measure and record analog or binary
outputs.
Current Output:
Scaled Output:
Refer to flow meter wiring diagram 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
Each contact closure = unit volume identified as “Scale Factor” (measure and record time
interval between contact closures)
8. Compare various output signals to
each other and to the flow rate
displayed and to the control system.
Compare the flow rates calculated in STEP 7 to the flow rate indicated by the display and the
control system. Refer to troubleshooting guide when readings are inconsistent.