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6/08 ST 3000 Release 300 and SFC Model STS103 User’s Manual 131
7.5 Pressure Measurement with DP Transmitter
Procedure
The procedure in Table 40outlines the steps for starting up a differential
pressure (DP) type transmitter in a pressure measurement application.
Refer to Figure 40 for the piping arrangement identification and Figure
38 for typical SFC and meter connections.
Figure 40 Typical Piping Arrangement for Pressure Measurement with DP Type Transmitter.
Valve D
Valve A
Plug C
LP Vent
HP Vent
HP side
Differential
Pressure
Transmitter
LP side
H
Table 40 Starting Up DP Transmitter for Pressure 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
Close valve D. See Figure 40 for sample piping
arrangement.
3
Open plug C and valve A to apply head
pressure H to meter body. Then, open
LP vent.
Allow system to stabilize at head
pressure.
Continued on next page