Differential pressure transmitters are commonly used for micro pressure measurement
of hydrostatic pressures such as filter and equipment leakage tests for improving
accuracy.
Steam flow measurement
For steam flow measurement, up-tilt the guiding pressure tube by 45°. Ensure that
transmitter installation location is at lower level than that of the process pipeline. Pre-
inject cooling liquid into the guiding pressure tube. Slowly open the shut-off valve to start
measurement. Periodically open the drain vent to clear the residual steam from guided
pipeline to improve the measurement accuracy.
Liquid flow measurement
For liquid flow measurement, tilt down the guiding pressure tube by 45°. Ensure that
transmitter installation location is at lower level than that of the process pipeline. Pre-
inject cooling liquid into the guiding pressure tube. Slowly open the shut-off valve to
start measurement. Periodically open the drain vent to clear the residual liquid, which
will improve the measurement accuracy.
Air flow measurement
For liquid flow measurement, up-tilt the guiding pressure tube by 45°. Ensure that
transmitter installation location is at lower level than that of the process pipeline. Pre-
inject cooling liquid into the guiding pressure tube. Slowly open the shut-off valve to start
measurement. Periodically open the drain vent to clear the residual gas from the guiding
pressure tube, which will improve the measurement accuracy.
Open container level measurement-single flange level transmitter
Verify the process medium compatibility in case of open container level measurement.
For accurate measurement, install the transmitter at a location where liquid level and
temperature fluctuations are minimal.
Sealed container level measurement-single flange level transmitter
Use a single flange diaphragm system for sealed container level measurement. Increase
the isolation tank and multiple shut-off valves. Periodically open the drain/vent valve to
clear off the residual gas and liquid in the guiding pressure tube for higher accuracy.
