Yamatake Corporation Operation of the Transmitter
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 5-31
5-4 : Measurement with Model STG/STA
5-4-1 :Pressure Measurement
5-4-1-1 Preparation for Measurement
WARNING
• Make sure that the process is in the manual control mode.
If the process is in the automatic control mode, switch it to manual mode.
• For hazardous fluids (poisons etc.) take any necessary actions to prevent
physical hazard and ensure that work proceeds with adequate care.
• Before starting a measurement procedure, ensure closure of the pressure
valve (main valve), the local valve, the drain valve, and the gas vent plug
(Refer to Figure 4-12).
Gas pressure measurement
Perform zero-point calibration and introduce process pressure, with this procedure:
• Zero point calibration
Step Description
1 Open the vent plug to release the pressure receiving part to the open air.
2 Referring to procedure2 in page 5-10, perform zero-point calibration.
3 When calibration is complete, close the vent plug.
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