65
Reference Manual
00809-0100-4809, Rev DA
Section 3: Commissioning
September 2015
Commissioning
Gas service 3-valve manifold
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. Open the high and low manifold valves MH and ML. Refer to Figure 3-1 for valve
designations.
2. Open the Equalizer valve ME.
3. Open the drain/vent valves on the transmitter DVH and DVL; bleed to ensure that no
liquid is present.
4. Close both drain/vent valve DVH and DVL.
5. Close the low side valve ML.
6. Check the transmitter zero by noting the output. If the signal reads outside of the range
3.98 mA to 4.02 mA, then perform a zero trim.
7. After zero trim, if the signal reads outside of the range 3.98 mA to 4.02 mA, repeat
Steps 1 - 6.
8. Close the Equalizer valve ME.
9. Open the low side valve ML, ensure that the high side valve MH is open. The system is
now operational.
Gas service 5-valve manifold
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. Open high and low manifold valves MH and ML. Refer to Figure 3-2 for valve
designations.
2. Open high side equalizer valve MEH.
3. Open low side equalizer valve MEL.
4. Open manifold vent MV; Bleed until no liquid is present in the gas.
5. Close manifold vent MV.
6. Close low side manifold valve ML.
7. Check transmitter zero by noting the output. If the signal reads outside of the range
3.98 mA to 4.02 mA then, perform a zero trim procedure as described in the
transmitter manual.
8. After the zero trim, if the signal reads outside the range 3.98 mA to 4.02 mA, repeat
Steps 1 - 6.
9. Close low side equalizer valve MEL.
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