Onicon F-3100 Series Manual do Utilizador descarregar pdf (Página 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 ow 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. Conrm ow 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 identied in this manual.

2. 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 certicate.

3. 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).

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 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.

7. Measure and record analog or binary

outputs.

Current Output:

Scaled Output:

Refer to ow meter wiring diagram 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

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

interval between contact closures)

8. Compare various output signals to

each other and to the ow rate

displayed and to the control system.

Compare the ow rates calculated in STEP 7 to the ow rate indicated by the display and the

control system. Refer to troubleshooting guide when readings are inconsistent.

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