Table 42 Starting Up Dp Transmitter For Liquid Level Measurement In Pressurized Tank - Honeywell ST 3000 User Manual

7.7 Liquid Level Measurement - Pressurized Tank,
Procedure, continued
Table 42 Starting Up DP Transmitter for Liquid Level Measurement in Pressurized Tank
Step Press Key
1
2
3
4 DE READ
A
ID
5 NON-VOL
ENTER
(Yes)
6
E
LRV
0%
G
SET
NON-VOL
ENTER
(Yes)
7 INPUT
J
OUT-
PUT
138 ST 3000 Release 300 and SFC Model STS103 User's Manual
Read Display or Action
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.
Close block-off valves A and B.
Open plugs C and D.
T A G N O .
T R I P S S E C U R E D ?
T A G N O .
S F C W O R K I N G . .
L I N D P T
P T
L R V 1 P T
"
Ø . Ø Ø Ø Ø
L R V 1 P T
S E T L
L R V 1 P T
"
1 Ø 5 . 3 2
O U T P 1 P T
S F C W O R K I N G .
O U T P 1 P T
Ø . Ø Ø Ø
See Figure 38 for sample SFC and
meter connections in a typical
analog loop with a differential
pressure type transmitter.
See Figure 42 for sample piping
arrangement.
Allow system to stabilize at head
pressure.
Be sure any switches that may trip
alarms or interlocks associated with
?
analog loop are secured or turned
off.
Confirm that "TRIPS" are secured
and establish communications with
.
sample transmitter PT 3011
A G N O .
3 Ø 1 1
Read present LRV setting.
3 Ø 1 1
H 2 O _ 3 9 F
Prompt asks if you want to set LRV
3 Ø 1 1
to applied pressure.
R V ?
LRV is set to applied head pressure
3 Ø 1 1
H times density of liquid in
H 2 O _ 3 9 F
1
reference leg.
Call up output for display.
3 Ø 1 1
. .
Read 0% output on display for
3 Ø 1 1
corresponding empty tank pressure
%
plus head pressure H
transmission, check that
milliammeter reading is 4 mA (0%)
output.
Continued
Description
. For analog
1
Continued on next page
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