HP 4262A Operating And Service Manual page 49

Table 3-4
Table 3-4. Unusual Operating Indications (Sheet 3 of 4).
Cause A.
Effect of Low terminal capacitance with
respect to ground.
Excessive measurement error.
Allowable Stray
Capacitance Magnitude
Measurement
Frequency
sample measured during capacitance
measurement, This decrease in signal level
will not produce an additional error even
when measurement signal level is reduced to
a third of its nominal level, It is neccessary,
of course, that special care be taken to use
the proper test signal level when a device is
measured whose parameters may be affected
by the test signal level, Display fluctuations
may sometimes appear.
1. Connect sample battery (observe polarity)
as illustrated.
Internal resistance of a battery can not be
measured,
Batteries up to 40V are measured under
no load conditions,
UNKNOWN
If battery voltage exceeds 4V, set
DC BIAS to EXT
GUARD Lcun Leot POT H cur
OC BIAS ~ DC BIAS +
Since the internal resistance of a battery
is relatively low, use the four- terminal
measurement configuration.
3-25