Appx.
1
Appendix
Appx. 1 Effect of Extending the Test
Lead and Induced Voltage
A special order has to be placed for extending the test lead.
Contact your authorized Hioki distributor or reseller.
Users must not extend the test leads by themselves.
Reducing Induced Voltage
The instrument is affected by the induced voltage as it measures minute
resistance with AC power. The induced voltage refers to a voltage that allows
the current generated in the instrument to build an inductive coupling in a lead
and affect the signaling system.
Because the phase of the induced voltage is shifted from that of the
AC current (reference signal) by 90 degrees, it can be eliminated with a
synchronous detection if the voltage is low. But for high levels, the induced
voltage distorts the signals, causing incorrect synchronous detection. Since
the induced voltage increases with the length of the test leads, the key to
reducing the induced voltage is to shorten the test leads. Reducing the length
of the branched section is particularly effective.
Even when using the standard test lead, if the lead arrangement differs
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the 3 m
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range, the effects of the induced voltage causes the measurement
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5
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Appx.
Index
Appx.
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