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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