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Yamatake STD920 User Manual

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Yamatake Corporation Operation of the Transmitter
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 5-9
5-3 : Measurement with STD type
5-3-1 :Flow Rate Measurement
5-3-1-1 Preparation for Measurement
WARNING
Make sure that the process is in the manual control mode.
If in automatic control mode, switch to manual control before starting the follow-
ing procedures.
Drain poisonous fluids with care, making provisions to protect personnel.
Always close the differential pressure output valve (main valve), the
drain valve, the gas vent plug (refer to figures 4-8 and 4-9) and the high
pressure side and low pressure side stop valves of the 3-way manifold
valve. Also, open the equalizer valve of the 3-way manifold valve.
Procedure 1
Lead process pressure into the pressure receiving part of the transmitter, using this
procedure:
Step Description
1 Gradually open the main valves of both the high-pressure side and the
low-pressure side (Refer to Figure 4-8 and Figure 4-9). Lead process fluid
into the connecting pipe.1
2 Fill with process fluid, the pressure-receiving part of the transmitter.
1. Gradually open the high pressure side stop valve. Close, after the pres-
sure receiving part has completely filled with process fluid.
2. Gradually open the low pressure side stop valve. Close, after the pres-
sure receiving part has completely filled with process fluid.
(Equalizer valve)
High-pressure side
Low-pressure side
Low-pressure side
stop valve
3-way manifold valve
Vent / Drain plug
( )

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Yamatake STD920 Specifications

General IconGeneral
BrandYamatake
ModelSTD920
CategoryTransmitter
LanguageEnglish

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