Sensia QRATE Scanner 3300, Инструкция по установке, эксплуатации и обслуживанию

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Installation Procedure—Direct Mount to Orifice Meter or Cone Meter
A MVT can be mounted directly to an orifice meter or cone meter for liquid measurement using a side-port transducer, a
block manifold and two football flange adapters ( Figure 2.18 ). The setup of the meter run and plumbing configurations
can vary widely, depending upon the challenges existing on location.
MVT with
side ports
Block
manifold
Adapter
(2 typ.)
3/4 in. conduit
connection for
input/output &
communications
Figure 2.18 - Direct-mount liquid run installation (shown with a cone meter). Downstream RTD not shown.
CAUTION When measuring liquid with a direct-mount MVT, process connections must be parallel to the hori-
zontal centerline of the meter, or below the centerline to eliminate air pockets.
1. Verify that the meter is properly installed in the flow line (per manufacturer’s instructions).
2. Screw a football flange adapter onto each meter pressure tap using pipe tape or pipe dope to seal the threads.
3. Align the bolt holes in the MVT and manifold, and install bolts to mate these components to the football flanges,
using o-rings as appropriate. Torque the bolts to the manufacturer’s specification.
4. Verify that all manifold valves are closed, and fill the meter with process fluid.
5. Loosen one of the vent screws in the side of the MVT.
6. Open the equalizer valves and the vent valve on the manifold.
7. Slowly open one of the bypass/block valves on the manifold. Process fluid should immediately spurt from the MVT
vent.
8. When air bubbles are no longer visible around the MVT vent, tighten the MVT vent screw.
9. Loosen the other vent screw in the side of the MVT, and repeat steps 7 through 9.
10. Follow guidelines outlined in MVT manual to perform a manifold leak test.
11. Wire outputs or COM connections from the MVT to the inputs or COM connections on the back of the QRATE
Scanner 3300.
12. 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 QRATE Scanner 3300 integrated control flow computer