3. Connect the MVT and manifold assembly to the differential pressure meter. Hardware requirements will vary,
depending upon the installation configuration. However, minimally, an adapter is required that can span between the
threaded pressure tap/orifice flange connector and the non-threaded manifold. This adapter can be a one-piece sta-
bilizer (often preferred for added strength and stability) or a short heavy wall pipe nipple attached to a futbol flange
(available from Sensia). Use a suitable compound or tape on all threaded process connections.
Note
To prevent fittings from turning and/or to avoid putting tension on stainless steel tubing, use a backup wrench to
attach stainless steel tubing to shut-off valves or sensor ports.
CAUTION Whenever possible, locate the hot legs of a steam installation behind the Scanner 3300 safely out
of the operator’s normal reach. This will help prevent accidental burns.
4. Install tubing to connect the high-pressure and low-pressure process connections of the block manifold to the pipe
tees installed in step 3. This tubing section is typically referred to as the cold legs of the installation, since it is filled
with water.
5. To eliminate air bubbles, fill the cold legs with water or other fill fluid from the lowest point in the system, typically
the MVT, using the following steps:
a. Open the blowdown valve or remove the filling plug from one of the pipe tees/condensate pots.
b. Open the equalizer and bypass/block valves on the block manifold. Ensure the vent valve is closed.
c. Remove the corresponding (high pressure or low pressure) vent screw from the side of the MVT and insert a
fitting to allow connection of a hand pump or funnel. If a funnel is used, attach a length of Tygon tubing that is
long enough to elevate the funnel well above the condensate pot to force the fluid up the legs.
d. Connect a hand pump or funnel to the fitting.
e. Pour fill liquid into the funnel or pump it into the cold leg, tapping the cold leg occasionally to dislodge any
bubbles.
f. Observe the pipe tee/condensate pot and stop pouring when the fill liquid is visible at the top and no air bubbles
can be seen.
g. Remove the fitting from the vent of the MVT and quickly replace the vent screw and tighten.
h. Close the blowdown valve or replace the filling plug from one of the pipe tees/condensate pots.
i. Repeat steps a through h for the other cold leg.
6. To eliminate an offset of the differential pressure reading, open the equalizer valves on the block manifold, remove
the caps from the seal pots, and adjust either seal pot vertically to bring the water levels to the exact same elevation.
7. Follow guidelines outlined in MVT manual to perform a manifold leak test.
8. Wire outputs or COM connections from the MVT to the inputs or COM connections on the back of the Scanner
3300.
9. Verify the zero offset (and other calibration points), if required.
IMPORTANT
Do not put the MVT into operation until the valves are positioned properly so that pressure is
supplied to both sides of the transducer.
41
Scanner 3300 EFM
Section 2
Summary of Contents for 3300 EFM
Page 6: ...This page intentionally left blank v Scanner 3300 EFM Table of Contents...
Page 25: ...This page intentionally left blank 19 Scanner 3300 EFM Section 1...
Page 55: ...This page intentionally left blank 49 Scanner 3300 EFM Section 2...
Page 68: ...This page intentionally left blank 62 Section 3 Scanner 3300 EFM...
Page 76: ...This page intentionally left blank 70 Section 4 Scanner 3300 EFM...
Page 80: ...This page intentionally left blank 74 Section 5 Scanner 3300 EFM...
Page 84: ...This page intentionally left blank 78 Section 6 Scanner 3300 EFM...
Page 87: ...This page intentionally left blank A 3 Scanner 3300 EFM Appendix A...
Page 91: ...This page intentionally left blank B 4 Appendix B Scanner 3300 EFM...
Page 93: ...This page intentionally left blank C 2 Appendix C Scanner 3300 EFM...
Page 95: ...This page intentionally left blank C 4 Appendix C Scanner 3300 EFM...
Page 97: ......
Page 98: ......
Page 99: ......
Page 100: ......