72
Reference Manual
00809-0100-4809, Rev DA
Section 3: Commissioning
September 2015
Commissioning
Figure 3-5. Remote Mount Gas Application
Steam service or liquid service above 250 °F (121 °C)
The following procedures assume the process pipe is pressurized to normal operating pressure
and should be followed to obtain a true zero at static or “pipe” pressure.
1. Ensure that primary instrument valves PH and PL are closed; ME, ML, and MH are closed;
and DVL and DVH are closed. Refer to Figure 3-6 for valve designations.
a. For 5-valve manifolds, ensure that valves MEH and MEL are closed.
2. Fill tees with water on each side until water overflows.
3. Open valves MH, ML, and equalizer valve ME.
a. For 5-valve manifolds, open valves MH and ML and equalizer valves by first opening
MEH, then opening MEL.
4. Briefly, open drain valves DVL and DVH.
5. Tap manifold until no air bubbles are visible.
6. Close both drain valves DVL and DVH.
7. Refill tees with water to the middle of each tee fitting.
8. Gently tap transmitter body, valve manifold, and impulse piping to dislodge any
remaining entrapped air.
9. Check transmitter zero by noting the output. If the signal reads outside of the range
3.98 mA to 4.02 mA, air is probably still in the system; repeat this procedure from step
2. Perform zero trim procedure, if necessary.
DVH
DVL
ME
MH
PH
PL
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