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6/08 ST 3000 Release 300 and SFC Model STS103 User’s Manual 141
7.8 Pressure or Liquid Level Measurement with GP
Transmitter,
Continued
Procedure, continued
ATTENTION
For the procedure in Table 43, we are assuming that piping arrangement
includes a block-off valve and a Tee-connector. If your piping does not
include a Tee-connector, you can only verify that the input and output
readings correlate.
Table 43 Starting Up GP Transmitter for Pressure or Liquid Level 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 block-off valve. See Figure 43 or 44 for sample
piping arrangement.
3 Remove plug from Tee-connector to
vent it to atmosphere, if applicable.
Allow system to stabilize at static
pressure.
4
DE READ
A
ID
TA ON.G
?TRIPS SECURED?
Be sure any switches that may trip
alarms or interlocks associated with
analog loop are secured or turned
off.
5
NON-VOL
ENTER
(Yes)
TA ON.G
SFC WORKING.. .
LIN AG NO.DP T
P T3Ø11
Confirm that “TRIPS” are secured
and establish communications with
sample transmitter PT 3011
6
^
SHIFT
INPUT
J
OUT-
PUT
PTOUT 3Ø111P
FT–SHI
PTINP 3Ø111UT
FC WOSING
.
RK ..
PTINP 3Ø111UT
.Ø Ø42Ø PSI
Initiate shift key selection.
Read applied input pressure which
should be zero.
7
INPUT
J
OUT-
PUT
PTOUT 3Ø111P
FC WOSING.RK ..
%.Ø
PTOUT 3Ø111P
ØØØ
Call up output for display.
Read 0% output on display for
corresponding input pressure. For
analog transmission, check that
milliammeter reading is 4 mA (0%)
output.
Continued on next page