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

4.1 VOLTAGE OUTPUT ZERO ADJUSTMENT

Transducer zero may be adjusted by monitoring the voltage between +OUTPUT and -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. Com-
pound transducers may alternatively be adjusted at atmospheric pressure using the Diagram 5.
PSI COMPOUND
-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
BAR COMPOUND
-1 to 1.7
-1 to 3.4
-1 to 35
-1 to 35
-1 to 70
-1 to 200

4.2 VOLTAGE 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.
6
NOMINAL "INSTALLED" OUTPUT AT ATMOSPHERIC PRESSURE
5 VDC FSO
RANGE
0.2 to 5.2 VDC
2.051
1.336
0.841
0.478
0.343
0.272
0.224
5 VDC FSO
RANGE
0.2 to 5.2 VDC
2.052
1.336
-1 to 7 0.825
2.494
0.339
0.270
0.225
0 to 5 VDC 0.2 to 10.2 VDC
1.851 3.903
1.136 2.472
0.641 1.482
0.278 0.755
0.143 0.486
0.072 0.345
0.024 0.249
0 to 5 VDC 0.2 to 10.2 VDC
1.851 3.904
1.136 2.473
0.625 1.450
0.278 0.756
0.139 0.478
0.070 0.341
0.025 0.250
Diagram 5
10 VDC FSO
0 to 10 VDC
3.703
2.272
1.282
0.555
0.286
0.145
0.049
10 VDC FSO
0 to 10 VDC
3.704
2.273
1.250
0.556
0.278
0.141
0.050