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28 266CRH / 266CRT, 266CSH / 266CST MULTIVARIABLE PRESSURE TRANSMITTER | OI/266CXX/MODBUS-EN REV. A

… 6 Installation

… Mounting recommendations

To commission the transmitter, operate the valves in the

following sequence:

1. Open the equalizing valve.

2. Close the low pressure valve and high pressure valve.

3. Open the primary shutoff valves.

4. Slowly open the high pressure valve so that the

measuring medium can flow into the measuring cell on

both sides.

5. Vent or drain the measuring cell and close the valves.

6. Open the low pressure valve and close the equalizing

valve.

Flow measurement of gas or liquid with solids in

suspension

M10764-01

H L

1 2

H L

H High pressure side

L Low pressure side

1 High-pressure valve

2 Low pressure valve

3 Equalizing valve

Figure 19: Flow measurement of gases or liquids

• Place taps above or to the side of the line.

• Mount the transmitter above the taps.