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ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
128
7.4 Flow Measurement with DP Transmitter
Procedure
The procedure in Table 39 outlines the steps for starting up a differential
pressure (DP) type transmitter in a flow measurement application. Refer
to Figure 39 for the piping arrangement identification and Figure 38 for
typical SFC and meter connections.
Figure 39 Typical Piping Arrangement for Flow Measurement with DP Type Transmitter
HP
LP
LP Blockoff
Plug G
Plug F
Valve A
Valve B
Valve C
HP Blockoff
Differential
Pressure
Transmitter
ATTENTION
For the procedure in Table 39, we are assuming that all the valves on the
three-valve manifold and the block-off valves were closed at
installation.
Table 39 Starting Up DP Transmitter for Flow Measurement With SFC
Step Press Key Read Display or Action Description
1
Connect SFC across loop wiring and
turn it on. If possible, locate SFC where
you can also view receiver instrument in
loop. If you want to verify transmitter
output, connect a precision milliammeter
or voltmeter in loop to compare
readings.
See Figure 38 for sample SFC and
meter connections in a typical
analog loop with a differential
pressure type transmitter.
2
Open equalizer valve C. See Figure 39 for sample piping
arrangement.
Continued on next page