Current Output Zero Adjustment; Current Output Span Adjustment - Setra Systems 225 Installation Manual

4.3 CURRENT OUTPUT ZERO ADJUSTMENT

Transducer zero may be adjusted by monitoring the current output while turning the zero potentiometer
screw. This adjustment should occur with atmospheric pressure applied for gage transducers. Absolute and
compound transducers should be adjusted while a full vacuum is applied. Compound transducers may alter-
natively be adjusted at atmospheric pressure using the Diagram 6.
WARNING: Pressure should be applied with inert gases or clean air only. For transducers with
ATEX Ex marking, no adjustment should be made in the presence, or potential for, hazardous
atmosphere.
BAR COMPOUND
RANGE
-1 to 1.7
-1 to 3.4
-1 to 7
-1 to 17
-1 to 35
-1 to 70
-1 to 200

4.4 CURRENT OUTPUT SPAN ADJUSTMENT

Zero adjustment must be performed prior to span adjustment. Span adjustment should only be performed
by use of an appropriate pressure standard (electric manometer, digital pressure gauge, etc) with at least 4X
the accuracy of a model 225. The span may be adjusted by turning the span potentiometer while full scale
pressure is applied to the pressure port.
WARNING: Pressure should be applied with inert gases or clean air only. For transducers with
ATEX Ex marking, no adjustment should be made in the presence, or potential for, hazardous
atmosphere.
NOMINAL "INSTALLED" OUTPUT AT ATMOSPHERIC PRESSURE
CURRENT OUTPUT
(mA)
9.92
7.63
6.00
4.88
4.44
4.22
4.07
PSI COMPOUND
RANGE
-14.7 to 25
-14.7 to 50
-14.7 to 100
-14.7 to 250
-14.7 to 500
-14.7 to 1000
-14.7 to 3000
Diagram 6
CURRENT OUTPUT
(mA)
9.92
7.63
6.05
4.89
4.46
4.23
4.08
7