The normal setup and calibration as shown in the IRt/c Operating Manual and Tech Note #1 automatically compensates for the emissivity and reflectivity of the material whose temperature is being con-trolled, and completely accounts for these effects at the controlled temperature. However, for processes in which the control temperature set-point varies, the control device will provide higher accuracy over a wider range if its SPAN or GAIN adjustment is used to calibrate the process. Accordingly, the calibration set-up should include a standard two point method of setting the span.

1. Install IRt/c as close as possible.
2. Wire connections in standard fashion.
3. At low operating temperature, measure actual temperature with D-Series.
4. Adjust OFFSET, ZERO, or LO CAL to match reading on D-Series.
5. At high operating temperature, measure actual temperature with D-Series.
6. Adjust SPAN, GAIN, or HI CAL to match reading on D-Series.