Calculate - Fluke Hart Scientific 1575 Super-Thermometer User Manual

7 Front Panel Operation
Probe Menu
PROBE MENU). You must also specify that you want to calibrate the probe in
the SETUP function by selecting a channel. Since you will not actually be mea-
suring the data, you may select any arbitrary channel as long as the probe is not
set to NO CAL. You may ignore the other setup parameters since they pertain
to the measurement step.
7.4.4.2.9

Calculate

The CALCULATE soft-key allows you to calculate ITS-90 coefficients for a
probe using the measured or entered resistance-temperature data. When you
press the soft-key, a window appears to warn you that this step will change the
coefficients of the calibration probes. This is a precaution against inadvertently
changing the coefficients. Press NEXT (or Enter) to continue. Press RETURN
(or Exit) to cancel and return to the menu.
Next, a window will show the first probe in the set and ask if you want to pro-
ceed with calculating the coefficients. You can select any probe in the set using
the LR buttons. Only those probes assigned a channel in the setup can be
selected. Press the CALCULATE soft-key (or Enter) to continue with the calcu-
lation. If the calculations are successful, the old probe coefficients will be re-
placed with new ones. To view the new coefficients, use EDIT PROBE in the
PROBE MENU.
If there is an error with the data that causes the calculation to fail, or if the
probe does not conform to the ITS-90 specifications for W(302.9146K),
W(234.3156K), or W(1234.93K), a warning message will appear, "WARN-
ING: THIS PROBE DOES NOT MEET ITS-90 SPECIFICATIONS". When
finished, press the RETURN soft-key (or Exit) to return to the menu. If desired
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