Onicon F-4000 Series Manual de usuario descargar pdf (Pagina 45)

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F-4000 Series Ultrasonic Flow Meter Manual 05/15 - 0707-13 / 18838 Page 45

SECTION 6.0: COMMISSIONING FOR ONICON

CLAMP-ON ULTRASONIC FLOW METERS

Please read all installation instructions carefully before proceeding. Wiring diagrams are located in an earlier

section of this manual. Use the meter certicate of calibration to verify that the specied installation &

operating parameters match the actual conditions at the location where the meter is installed. A worksheet

for checking off these steps and recording measured values is located in section 5.3.

6.1 HELPFUL HINTS FOR START-UP AND COMMISSIONING

Please read these helpful hints before proceeding with the commissioning procedure on the next page.

1. ONICON ow meters are individually calibrated for a particular application. Be sure to verify

the pipe size and location.

2. The ultrasonic ow sensing systems will not work with an empty pipe.

3. When measuring analog output signals, remember that current (mA) must be measured in

series, while voltage is 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 Hz, take your multimeter out of “auto range mode” and

manually set the range for a voltage level above 15 VDC. This will prevent false readings

when signal is not present.

6.2 COMMISSIONING PROCEDURE

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

and recording measured values provided in Section 5.3.

1. Conrm that the ow meter is

being installed in accordance

with Sections 1.8 and 3.2 of

this manual.

Conrm that the installation location is removed from any sources of strong

electrical interference and that the enclosure is mounted on a vibration-free

surface.

Conrm that the transducer signal cables are run in dedicated conduit

without other signal or power cables.

2. 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 to

discuss specics of your application. If straight pipe run is very short,

consult ONICON PRIOR to commissioning the meter.

3. 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).

4. Verify the type of uid used

in the piping system.

Conrm that the uid specied on the ow meter certicate of calibration

matches the uid owing in the piping system.

5. Conrm control system

programming.

Conrm that the control system input points are properly congured for

the analog output range, pulse scale factor and/or relay output function

identied on the calibration certicate & meter tag.

6. Conrm connection to the

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).

7. Verify output signal wiring. Verify that the wiring is correct as shown in this manual and/or the

additional wiring diagram provided with the ONICON display or Btu meter.

If in doubt, contact ONICON for assistance before proceeding further.

8. Conrm correct supply

voltage.

Verify that the supply voltage is within specied limits.

11.5 – 28.5 VDC or 90 – 240 VAC 50/60Hz

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.

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