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6/08 ST 3000 Release 300 and SFC Model STS103 User’s Manual 149
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, continued
Step Press Key Read Display or Action Description
6
E
LRV
0%
SET
G
NON-VOL
ENTER
(Yes)
PTLRV 3Ø111
Ø
. ØØØØ
"
H2O
_
39F
PTLRV
RV
3Ø11
L
1
?SET
PTLRV 3Ø111
1
.35 36
"
H2O
_
39F–
Read present LRV setting.
Prompt asks if you want to set LRV
to applied pressure.
LRV is set to fixed reference leg
pressure H2 times specific gravity of
remote seal fill fluid and –1 for
pressure on low side of meter body.
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 empty tank pressure
plus reference pressure H2. For
analog transmission, check that
milliammeter reading is 4 mA (0%)
output.
8
If you … Then…
can not fill tank go to Step 9.
can fill tank go to Step 10.
9
Key in URV that is equal to full tank
pressure. See section 6.7 in this manual
for details on keying in a range value.
Go to Step 12.
You can use these formulas to
calculate URV in inH
2
O.
Span = H1 x S
L
H1 = Height of variable head
in inches.
S
L
= Specific gravity of
measured liquid.
URV = Span + LRV
Example: If H1 equaled 10 feet, the
measured liquid was water, and the
LRV equaled –135.36 inH2O;
substituting into the formulas yields.
Span = 10 ft x 12 in x 1.00
Span = 120 inH
2
O
URV = 120 inH
2
O + –135.36 inH
2
O
URV = –15.36 inH
2
O
ATTENTION
The specific gravity
of water at 60 °F (15.6 °C) is 1.00.
Continued on next page