70
Reference Manual
00809-0100-4809, Rev DA
Section 3: Commissioning
September 2015
Commissioning
Liquid service below 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. Refer to Figure 3-4 for valve
designations.
2. Open valves ME, ML, and MH.
a. For 5-valve manifolds, first open valve MEH, then open valve MEL.
3. Slowly open the low side primary instrument valve PL and then the high side primary
instrument valve PH.
4. For 3-valve manifolds:
a. Open drain/vent valves DVL and DVH to bleed air out of system. Bleed until no air is
apparent in the liquid.
b. Close valves DVL and DVH.
Figure 3-4. Remote Mount Liquid Application
5. For five-valve manifolds:
a. Slowly open vent valve MV to bleed out any entrapped air in manifold. Bleed until no
air is apparent in the liquid.
b. Close vent valve MV.
PH
PL
ML
DVL
DVH
ME
MH
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