The normal setup and calibration as shown in the
IRt/c Operating Manual and Tech Note #1 automati-
cally compensates for the emissivity and reflectivity
of the material whose temperature is being control-
led, 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 to surface
being measured..
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.