Operation of the Transmitter Yamatake Corporation
5-30 ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
5-3-4-3 Stopping Measurement
Procedure
How to stop the transmitter
CAUTION
• If the transmitter is to be left off for a long period of time, drain process
fluid from the connecting pipe and the pressure receiving part.
• Leave the equalizer valve open.
Step Description
1 Turn off the transmitter.
2 Operate the 3-way manifold valve by the following procedure:
1. Close the low pressure side stop valve.
2. Open the equalizer valve.
3. Close the high pressure side stop valve.
3 Close the main valve. (Refer to Figure 4-16.)
(Equalizer valve)
High-pressure side
Low-pressure side
Low-pressure side
stop valve
3-way manifold valve
Vent / Drain plug
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