Liquid Level Measurement - Pressurized Tank; Figure 31 Typical Piping Arrangement For Liquid Level Measurement With Dp Type Transmitter And Pressurized - Honeywell ST 3000 User Manual

Step
14 Take communicator and milliammeter readings to check that output signal does correspond to
applied tank level pressure.
If readings do not correspond, check that transmitter has been installed correctly. If applicable,
blow down piping to be sure no foreign matter is entrapped in it.
Check communicator and milliammeter readings again. If readings are still not correct, verify
transmitter's configuration data and change its range setting, if needed.
15 Remove communicator and milliammeter from loop.
Liquid Level Measurement – Pressurized Tank
Procedure
The procedure in Table 32 outlines the steps for starting up a differential pressure (DP) type transmitter in a
liquid level measurement application for a pressurized tank with a liquid-filled (wet) reference leg. Refer to
Figure 31 for the piping arrangement identification and Figure 27 for typical communicator and meter
connections.
Figure 31 Typical Piping Arrangement for Liquid Level Measurement with DP Type
10/05
Valve A
Tap location at the
minimum level to be
h
measured
Transmitter and Pressurized Tank.
ST 3000 HART Transmitter Release 300 User Manual
7— Start-up - Liquid Level Measurement – Pressurized Tank
Action
Plug D
Valve B
Plug C at
zero level
H 1
HP side of transmitter
Differential
Pressure
Transmitter
75