Operation & Installation Manual V12-V6 2010-05-31.doc
31/05/2010
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4
Installation of the ultrasonic gas flow meter
Figure 4-1: General installation requirements
•
Always lift the flow meter and its adjacent pipe spools (if applicable) at the lifting lugs
or use hoisting straps.
•
Install the ultrasonic gas flow meter in horizontal position with the flow arrow indicator
on the nameplate or on the meter body in the direction of the positive (forward) gas
flow.
•
The converter shall be located at the top of the ultrasonic flow meter.
•
Connect the pressure transmitter to the Pr-point on the meter body using an
intermediate isolation valve and/or valve manifold.
•
A temperature assembly (PT100 element with thermo well and transmitter) shall be
installed downstream in the positive flow direction at a position between 1.5DN and
3DN. In case of a bi-directional flow application the temperature transmitter shall be
positioned between 3DN and 5DN.
P
r
10D or 5D with flow
straightener
gas flow
1.5…3D
T
r
