Rosemount Model 1195/ProPlate/Mass ProPlate
4-8
Liquid Service below 450°F
(232°C)
Refer to Figure 2-27 and Figure 2-28 on page 2-21 for electronics
location and valve identification for liquid service at temperatures of
450°F (232°C) or less. See page 4-10 to commission a remote mounted
ProPlate for liquid service above 450°F (232°C).
1. Ensure that primary instrument valves PH and PL are closed.
2. Open valves ME, ML, and MH.
• For 5-valve manifolds, open valves MEH and MEL.
3. Slowly open valve PL and then PH, which are the primary
instrument valves.
4. Open drain/vent valves DVL and DVH to bleed air out of system.
Bleed until no air is apparent in the liquid.
5. Close valves DVL and DVH.
NOTE
For the alternate electronics location shown in Figure 2-28 on
page 2-21, open vent valves VH and VL and bleed until no air is
apparent in the liquid.
6. Slowly open vent valve MV to bleed out any entrapped air in
manifold. Bleed until no air is apparent in the liquid.
7. Close vent valve MV.
8. Gently tap the electronics body, valve manifold, and impulse
piping with a small wrench to dislodge any remaining entrapped
air.
9. Repeat steps 2, 2A, and 3.
10. Close valve PH.
11. Check the ProPlate zero by noting the electronics output — this is
called a wet zero. The electronics should indicate a zero DP
(Differential Pressure) signal. If the signal reads outside the range
3.98 mA to 4.02 mA, air is probably still in the system; repeat the
procedure from step 2. Trim zero if necessary.
12. Close equalizer valve(s).
• For 3-valve manifolds, close valve ME.
• For 5-valve manifolds, close valves MEH and MEL.
13. Slowly open valve PH. The system is now operational.
For 5-valve manifolds only:
14. Open valve MV. If valve MV is leaking, valves MEH and/or MEL
are not fully closed or require repair. This must be done before
taking any readings.
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