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Stop valve
Pressure receiving unit
Atmospheric
air leak valve
Process tap
Pressure source
Transmitter
Max. liquid
level
Min. liquid
level
Stop valve
H
1
Transmitter
Pressure receiving unit
Pressure source
Stop valve
Transmitter
Process tap
Atmospheric air leak valve
Pressure receiving unit
Typical examples of piping
(1) Gas measurement
Locate the process tap above the pressure
source
It 's recommanded to install the transmitter below the remote seal(s). it be-
comes necessary if process pressure is less than atmospheric pressure.
In order to prevent vibration of the transmitter body and capillary from in-
terfering with output, the transmitter body should be installed at a vibration
free place and the capillary should be
fi
xed to a stable support.
(3) Level measurement on opened tank
H
1
must be more than half of the remote
seal diaphragm diameter. Otherwise the
measure will not be linear to the level as
far as the diaphragm is not totally submer-
ged.
(2) liquid measurement
Locate the process tap below the pressure
source
PRECAUTION