Sensia 3300 EFM, Инструкция по установке, эксплуатации и обслуживанию

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Installation Procedure—Remote Mount to Orifice Meter or Cone Meter
A MVT can be mounted remotely and connected to an orifice meter or cone meter with tubing for gas measurement. The
setup of the meter run and plumbing configurations can vary widely, depending upon the challenges existing on location.
Figure 2.12 shows a typical remote-mount gas run installation.
Flow
Manifold
Pressure ports
(high/low)
L H
H L
3/4” conduit connection
(for input/output and
communications)
RTD assembly
Figure 2.12 - Remote-mount gas cone meter run installation. The remote-mount method can be used with an orifice meter
as well.
Note To prevent fittings from turning and to avoid putting tension on stainless steel tubing, use a backup wrench to
attach stainless steel tubing to a manifold, shutoff valves, or sensor ports.
1. Verify that the meter is properly installed in the flow line (per manufacturer’s instructions).
2. Mount the MVT to a 2-in. pipe using the mounting bosses on the side of the enclosure and a Sensia pole mount kit.
See Multi Variable Transmitter Mounting, page 20 for detailed mounting instructions.
3. Install tubing and fittings to connect the manifold assembly to the differential pressure meter, sloping the gauge lines
downward to the meter at a minimum of one inch per foot. Use a suitable compound or tape on all threaded process
connections.
CAUTION Do not use Teflon tape on the threads of the union, adapter, or pipe plugs that may be installed in
the enclosure.
4. Install the RTD assembly in the thermowell. Route the RTD assembly cable to the back of the Scanner 3300 to con-
nect to the terminal board. A wiring diagram for the RTD assembly is provided in Figure 3.9, page 56 .
5. Follow guidelines outlined in MVT manual to perform a manifold leak test.
6. Wire outputs or COM connections from the MVT to the inputs or COM connections on the back of the Scanner
3300.
7. Verify the zero offset (and other calibration points), if required.
CAUTION Do not put the MVT into operation until the valves are positioned properly so that pressure is sup-
plied to both sides of the transducer.
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Section 2 Scanner 3300 EFM