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ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
80
6.7 Setting Range Values Using SFC
Background
You can set the LRV and URV by either keying in the desired values
through the SFC keyboard or applying the corresponding LRV and
URV pressures directly to the transmitter.
ATTENTION
• We factory calibrate ST 3000 Smart Transmitters with inches of
water ranges using inches of water pressure referenced to a
temperature of 39.2°F (4°C).
• For a reverse range, enter the upper range value as the LRV and the
lower range value as the URV. For example, to make a 0 to 50 psi
range a reverse range, enter 50 as the LRV and 0 as the URV.
• The URV changes automatically to compensate for any changes in
the LRV and maintain the present span (URV – LRV).
• If you must change both the LRV and URV, always change the LRV
first.
Procedure 1
Table 25 gives the procedure for the range values for a sample 5 to 45
inH
2
O at 39.2°F (4°C) range.
Table 25 Keying in LRV and URV
Step Press Key Read Display or Action Description
1
E
LRV
0%
PTLRV 3Ø111
Ø
. ØØØØ
"
H2O
_
39F
Present LRV setting. (Pressure for 4
mAdc (0%) output.)
2
5
S
PTLRV 3Ø111
5
_
"
H2O
_
39F
Key in desired LRV setting. (It is not
necessary to key in a decimal point
and zeros for a whole number.)
3
NON-VOL
ENTER
(Yes)
ORK NGCW .F.S.I
PTLRV 3Ø111
PTLRV 3Ø111
5
. ØØØØ
"
H2O
_
39F
Message exchange is working.
New LRV setting stored in
transmitter’s working memory.
4
URV
100%
F
PTURV 3Ø111
1
.Ø5 ØØ
"
H2O
_
39F
Present URV setting. (Pressure for
20 mAdc (100%) output.)
Continued on next page