Rockwell Automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Module - Manual (Page 43)

Calibrating Your Module
Chapter 6
6-3
Nulling the Input Offset
After completing the 10V reference adjustment, turn off power to your
processor and I/O chassis and complete the following steps.
1. Move jumper E1 (Figure 6.1) from the default position (connecting
the center and right posts) to the calibration position (connecting the
center and left posts).
2. Attach the negative lead of your voltmeter to an analog common (pin
5, 10, 15, 20 or 21) of the field wiring arm.
3. Attach the positive lead of your voltmeter to TP2.
4. Turn on power to your processor and I/O chassis. Check to make
sure the red FLT indicator is lit and the green RUN indicator is off. If
the red indicator is off, check the position of E1.
5. Adjust potentiometer R63 (Figure 6.1) until the value at
TP2 = 0.0000V (+0.0002V maximum).
6. After completing the adjustment, remove power from the I/O chassis
and return jumper E1 to the default position.
In this chapter you learned how to calibrate your module. This included the
necessary tools, adjusting the 10V reference, and nulling the offset.
Chapter Summary