b. The CCS should be placed on the working surface to allow connections
to be conveniently made.
4.
Operation. Remember to use solid copper wire when making connections
to any external instruments or voltage sources. Stranded or tinned wire or
lugs should not be used.
Every precaution should be taken to avoid
temperature variations when a measurement is being performed. Instruments
should be carefully and neatly connected to prevent accidental short
circuits during measurement. Special care should be taken to prevent short
circuits of the standard cell and current source.
CAUTION
DO NOT DISCONNECT THE POTENTIOMETER LINE CORD WITHOUT
FIRST DISCONNECTING THE CCS.
This is particularly important, otherwise the core will become temporarily
magnetized and zero readings will have to be checked for several days.
a. Controls and indicators.
All operating controls, indicators, and
terminals are mounted on the front panel of the potentiometer as shown in
Figure 2-2, and have the following functions:
Figure 2-2.
Front panel layout, Model 9931
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