Hioki 3522-50, Instruction Manual

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5.7 Supplying DC Bias
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CAUTION
The maximum voltage which can be applied to the test terminals
of the 3522-50 unit is 10 V DC. If a DC voltage greater than this
is applied continuously, the unit may be damaged.
NOTE
5.7.1 How to Supply a DC Bias Voltage
CAUTION
In order to avoid electric shock accident, be absolutely sure not to
touch the test terminals while the DC bias voltage is being supplied to
them.
If you disconnect the sample under test from the test terminals with
the DC bias voltage still being supplied, then the test sample is left
charged, which is very dangerous. In order to avoid electric shock
accident, be absolutely sure to discharge the test sample.
Use the 9268 at more 100.1Hz or more with the EXT DC bias of the
3522-50 switched off. Useing the 9268 at less than 100Hz or with the
EXT DC bias switched on may result in abnormal measurements or
damage to the unit.
Do not short circuit between the clips of the test probes with the DC
bias voltage still being supplied. Doing so may damage the probes or
cause a short circuit accident.
When measuring the element whose DC resistance is not high enough,
DC current will flow to the main unit and the measurement will not be
performed properly.
5.7 Supplying DC Bias
Supplying DC bias means that a DC voltage is supplied as a bias to a
sample for test whose characteristics are voltage dependent, such as an
electrolytic capacitor or a ceramic capacitor.
Further, a DC current can be supplied as a bias to a sample for test whose
characteristics are current dependent, such as a choke coil.
Since the 3522-50 unit has no DC bias input terminals, a DC bias must be
supplied in the manner described in the following sections.
When the DC bias is supplied to test, and if "OVER FLOW" is displayed
and test cannot be done, set the external DC bias function to ON. (See
Section 4.22, "External DC Bias Setting.")