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MODEL 1000N
d) Ohmmeter - Mode of Operation:
The high voltage section is not used when the instrument functions as a ohmmeter.
(Q2) and (CR3) constitute a constant current generator. The current generated flows through
the resistor under test (RX). The respective voltage (VRX) is directly measured by the
amplifier (Z5).
4/21/2005
REPAIR AND CALIBRATION MANUAL
(RX)
CONSTANT
CURRENT
GENERATOR
REV. 7: March 13, 2004
FILE LOCATION: Manuals - Cal. Man - 1000MAN.DOC
Measuring Amplifier
(Z5)
(R26)
Shift from 0 to 0.1 Ohm
for Start of Scale
10
CAT. #185.100
(G)
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