Installation Yamatake Corporation
4-20 ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
Recommended piping for wet leg - Example
When using the wet-leg method, connect the high-pressure side of the transmitter to
the sealing pipe of the tank. Connect the low-pressure side to the lower part of the
tank.
After completing piping work, check for pressure leaks around the connecting pipe,
the transmitter, and the 3-way manifold valve. The illustration shows a typical installa-
tion.
Be sure to connect the low-pressure side of this transmitter to the lower part of the
tank.
Install this transmitter below the lowest liquid level to be measured.
Figure 4-16 Closed Tank -- Piping (Wet-leg Sealing Example)
Gas vent plug
Main valve
Main valve
Vent / Drain plug
High pressure side
Low pressure side
Drain valve
Drain valve
Seal pot
Liquid level
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