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at the "-1.23V" testpoint: disregarding
polarity indication, record the voltage.
f.
Move the DVM HI lead to the "3.7V"
testpoint and record the voltage (disregard
polarity).
g.
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.
h.
Adjust Rb for an indicator display of 0.2 C.
i.
Set the resistance box to 148.4 ohms.
j.
Adjust Ra for an indicator display of +101.0 C.
k.
Reassemble the indicator.
l.
Perform the zero calibration
23
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