Honeywell ST 3000 User Manual page 163

7.11 Liquid Level Measurement with DP Transmitter with
Remote Seals,
Procedure, continued
Table 45 Starting Up DP Transmitter with Remote Seals for Liquid Level Measurement with
SFC
Step Press Key
1
2
DE READ
A
ID
3
NON-VOL
ENTER
(Yes)
4
5
6/05 ST 3000 Release 300 and SFC Model STS103 User's Manual
Continued
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.
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
If you ... Then...
can not empty go to Step 5.
tank
can empty tank go to Step 6.
Key in LRV that is equal to empty tank
pressure. See section 6.7 in this manual
for details on keying in a range value.
Go to Step 8.
See Figure 38 for sample SFC and
meter connections in a typical
analog loop with a differential
pressure type transmitter.
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
See Figure 48 for sample piping
arrangement.
You can use this formula to
calculate LRV in inH
LRV = H2 x S
H2 = Height of fixed reference leg
S = Specific gravity of remote
f
–1 = Required for LRV
calculation
low
Example: If H2 equaled 12 feet and
the fill fluid was silicone oil,
substituting into the formula yields.
LRV = 12 ft x 12 in x 0.94 x –1
LRV = –135.36 inH
ATTENTION The specific gravity
of silicone oil fill fluid is 0.94 and
florolube fill fluid is 1.84.
Description
O.
2
x –1
f
in inches.
seal fill fluid.
since pressure is on
side of meter body.
O
2
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