Filter
Top Products
ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
148
7.11 Liquid Level Measurement with DP Transmitter with
Remote Seals,
Continued
Procedure, continued
Table 45 Starting Up DP Transmitter with Remote Seals for 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
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.
3
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
4
If you … Then…
can not empty go to Step 5.
tank
can empty tank go to Step 6.
See Figure 48 for sample piping
arrangement.
5
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.
You can use this formula to
calculate LRV in inH
2
O.
LRV = H2 x S
f
x –1
H2 = Height of fixed reference leg
in inches.
S
f
= Specific gravity of remote
seal fill fluid.
–1 = Required for LRV
calculation since pressure is on
low side of meter body.
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
2
O
ATTENTION
The specific gravity
of silicone oil fill fluid is 0.94 and
florolube fill fluid is 1.84.
Continued on next page