Johnson Controls SABROE Unisab III Control - Adjusting Turning Transmitter

Besides, Unisab III automatically changes to automatic Vi control after the compressor has
been stopped.
7.5.6 Adjusting turning transmitter
SAB 110-128-163 and SAB 202 (capacity and Vi)
The turning transmitter has two ways of adjustment. The cover must be removed before ad-
justment. Fig. 30 illustrates the zero and span adjusting screws of the position transmitter.
1
3
No. 3
2
0%
2.
2.5
3.
4.5
4.
3.5
SPAN + ZERO
100%
Slide position
Volume ratio
1 = 4-20 mA
2= +24 VDC
3 = GND
Fig. 30: Zero and span adjusting screws of position transmitter
With the capacity or Vi slide in minimum position, adjust zero until the display shows 0%.
With the capacity or Vi slide in maximum position, adjust span until the display shows 100%.
Calibration
Engineering manual - Unisab III 1.10
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