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21
polrity).
j. The voltage measured at the “3.7V” test-
point should be 3.007 times larger than
the voltage measured at the “-1.23V” test-
point. Adjust Rc (which varies the +3.7V
line to attain the proper ratio.
k. Switch the indicator to the 1° range.
l. Adjust the voltage calibrator for an output of
+53.782mV for type K; +57.942mV for type J;
+75.983mV for type E; +18.824mV for type T;
m. Adjust Ra for an indicator display of +995°C
for type E, or 1000°C for type J, or +1340°C
for type K, or +367°C for type T.
n. Reassemble the indicator.
o. Perform the zero calibration.