Operation of the Transmitter Yamatake Corporation
5-32 ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
• Introducing process pressure and venting air
Step Description
1 1. Introduce the process pressure into the connecting pipe by opening the
main valve (Refer to "Figure 4-12 Example of Piping"). If the process
temperature is high, allow cooling time so that the connecting pipe is sta-
ble at a safe temperature, before starting work.
2. Open the local valve gradually to introduce the process pressure into the
pressure receiving part of transmitter.
2 1. Vent air from the center body by gradually opening the vent plug.
2. After venting air completely, close the plug and the local valve.
3 Ensure zero leakage exists at the connecting pipe and transmitter.
Vent / Drain plug
High-pressure side
Local valve
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