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Appendix 6 Zero Adjustment
A11
A
ppend
ix
If zero adjustment is difficult when using self-made measurement lead
to measure
When you perform zero adjustment using a self-made measurement lead to do measure-
ment, connect the tip of the self-made measurement lead as shown in Table 1 (a). How-
ever, if such connection is difficult, you can try the following methods.
If DC resistance meter is used
The main purpose of performing zero adjustment is to remove offset of the measurement
instrument. For this reason, the value to be deducted as a result of zero adjustment almost
does not depend on the measurement lead. Therefore, after using the standard measure-
ment lead to make the connection shown in Table 1 (a) and performing zero adjustment,
you can replace it with a self-made measurement lead to measure with offset removed from
the measurement instrument.
If AC resistance meter is used (HIOKI 3561, BT3562, BT3563, etc.)
In addition to removing offset of the measurement instrument, another main purpose of per-
forming zero adjustment is to remove influence of the measurement lead shape. For this
reason, when performing zero adjustment, try as much as possible to set the form of the
self-made measurement lead close to the actual measurement state. Then, you need to
make the connection as shown in Table 1 (a) and perform zero adjustment.
However, if a HIOKI product is used, even in AC resistance measurement, if the required
resolution exceeds 100
μΩ
, the same zero adjustment method used in DC resistance meter
may be sufficient.