Omega Engineering CL521 Operator's Manual page 16

4.3.3 Checking and Setting Reference Junction Temperature
The temperature in the reference junction compensation circuit or the compensation
temperature of an externai compensation circuit may be set to a temperature other than
0°C. The externai reference junction temperature may aiso be measured by methods
other than a Pt100 probe, in aii these cases, manuai compensation for reference
junction temperature must be used, and that temperature vaiue stored into memory
Register 9.
The vaiue in Register 9 indicates the temperature of the reference junction in °C,
regardless of the selected temperature units. Register 9 is automatically set to zero
whenever the manual reference junction compensation mode is selected.
To check the reference junction temperature, or to change it, proceed as follows:
NOTE: Make sure the MAN reference junction compensation mode is selected.
Switch the MEASUREMENT/CALIBRATION switch to the CALIBRATION
position.
Recall Register 9 (the reference junction temperature) to the display by entering:
RCL 9
The display will show, for example, "CJ 0.00 C".
To set the reference junction compensation temperature to
50°C, for
example,
enter:
5 0 STO 9
After checking and/or setting the reference junction temperature, return the
MEASUREMENT/CALIBRATION switch back to the MEASUREMENT position.
Setting
reference junction
temperature
Checking
reference junction
temperature
Figure 4-12. Checking and Setting Reference Junction Temperature
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