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  TM 11-6625-599-12
e. If full-scale deflection cannot be obtained,
E x a m p l e : With on unknown resistance connected to
t h e common input terminal and the input terminal of
set the NULL switch to .1 and the voltage-
the vtvm, the following ccnditions were observed:
divider switches to maximum and determine
RANGE switch at 500.
the unknown resistance from the following
NULL switch at .1.
equation:
Voltage-divider switches A through E at
4, 9, 9, 9, and 10, respectively.
E
Rx (megohms = 10 (--) where:
VOLTS meter indicates 0.04 volt. This in-
EM
formation would be used to determine
Rx is the unknown resistance in megohms.
that the value of the unknown resist-
E is the voltage-divider indicators
ance is 125,000 megohms.
(A through E) indication, and EM
f. Remove the resistance under test from the
is the VOLTS meter reading.
common input terminal and the input terminal.
16
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