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ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
88
6.8 Setting Range Values Using Local Adjustments,
Continued
Procedure, continued
Table 27 Setting Range Values Using Local Zero and Span
Adjustments, continued
Step Action
7
Using an accurate pressure source, apply pressure equivalent to
desired upper range value to transmitter.
ATTENTION
For differential pressure transmitters, apply pressure
to the high pressure head and be sure that the pressure to the low
pressure head is at its reference value.
8
Check that milliammeter reading is 20 mA.
If reading … Then…
is not exactly 20 mA go to Step 9.
is correct go to Step 10.
ATTENTION
If you have the Local Smart Meter with Zero and
Span adjustment option, you may substitute the Local Smart Meter
readings for the milliammeter readings. For example, with URV input
pressure applied assume that the meter reads 396 inH2O instead of
400 inH2O. In this case, the meter reading is less than 100% (or 20
mA).
Example – Local Smart Meter displaying transmitter output in inches
of water.
%
100
0
39
ANALOG
In H O
2
6
UPPER
VALUE
UNITS
LOWER
VALUE
SET
VAR
SEL.
SPAN
ZERO
Continued on next page