Zero And Span Adjustments; Selector Switch - Omega PX2088 User Manual

FIGURE 3-2. Transmitter Terminal and Electronics Compartments.
Negative Terminal
Test Terminal

ZERO AND SPAN ADJUSTMENTS

Adjustment controls for zero and span are located in the transmitter electronics
compartment. Calibrate the transmitter with the three-position switch and the
¾-turn potentiometer (see Figure 3-2).

Selector Switch

The selector switch is labeled "Z" (Zero), "RUN," and "S" (Span). The switch is set to
the "RUN" position at the factory, and should remain there under normal operation.
The selector switch must be returned to the "RUN" position after setting the proper
calibration. Failure to return the switch to the "RUN" position will, after 20 minutes, cause
the transmitter to return to the previously set 4–20 mA points. This will result in erroneous
transmitter output.
TERMINAL
COMPARTMENT
ELECTRONICS
COMPARTMENT
Test
Terminals
Selector
Switch
3-3
Potentiometer