Yamatake Corporation Operation of the Transmitter
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 5-15
5-3-1-3 Stopping Measurement
Procedure
Stop the transmitter, using this procedure:
CAUTION
• If you plan to leave the transmitter OFF for a long period of time, always
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 valves on the high and low pressure sides.
Refer to Figure 4-8 and Figure 4-9.
(Equalizer valve)
High-pressure side
Low-pressure side
Low-pressure side
stop valve
3-way manifold valve
Vent / Drain plug
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