VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 45
8 Commissioning
DANGER
Improper installation and commissioning of the device
carries a risk of explosion.
For use in potentially explosive atmospheres, observe the
information in Use in potentially explosive atmospheres in
accordance with ATEX and IECEx on page 7 and Use in
potentially explosive atmospheres in accordance with FM
and cCSAus on page 21!
DANGER
Danger of explosion if the device is operated with the
transmitter housing open!
Before opening the transmitter housing, bear in mind the
following:
• A valid fire permit must be present.
• Make sure that there is no explosion hazard.
• Switch off the power supply and wait for t > 2 minutes
before opening.
General Notes
The commissioning activities described here are performed after
the device has been installed and electrically connected.
Bear in mind the following during commissioning:
• The power supply must be switched off.
• When using liquid measuring media, the piping must be
vented carefully to avoid pressure shocks due to gas
bubbles.
• When using gaseous measuring media, increase the flow
pressure slowly.
• Basically, you should vary the flow with help of adjustable
valves (control valves) to protect the float from shock
waves. Otherwise, the flowmeter may be damaged.
• If fast opening solenoid valves are used, pressure shocks
on the float must be prevented by using suited damping
measures.
Switching on the power supply
The following points must be checked before commissioning the
device:
• Correct wiring in accordance with Electrical connections
on page 42.
• Correct grounding of the sensor.
• The ambient conditions must meet the requirements set
out in the specification.
• The power supply must meet the requirements set out on
the name plate.
Inspection after power-up of the power supply
The configuration of the measuring medium parameters
(standard and operating density) must be checked after
commissioning the device. The measuring medium parameters
must be adapted to the measuring medium being used if
necessary.
See ‘Standard density’ and ‘Operating density’ Menu on
page 54.
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