Appendix 8 Zero Adjustment
A12
To perform zero adjustment using a probe
When you actually perform zero adjustment using a probe, you may unexpect-
edly make the connection shown in Table 1 (b). Therefore, when performing
zero adjustment, you need to pay sufficient attention to the connection state of
each terminal.
Here, L2107 Clip Type Leads as mentioned in " Executing Zero-Adjustment" (
p.31) is used as an example for the connection explanation. Table 2 shows the
connection state of the tip of the lead and equivalent circuit in the respective cor-
rect and wrong connections. Table 1 (a) indicates the correct connection
method, resulting in 0 V between SENSE-H and SENSE-L. However, Table 1 (b)
is the wrong connection method, so that 0 V is not obtained between SENSE-H
and SENSE-L.
Table 2: Clip type lead connection methods used during zero adjustment
Connection method
Correct
Wrong
Tip of lead
Equivalent circuit
Deformed equiva-
lent circuit
As connection meth-
od for zero adjust-
ment
Correct Wrong
SOURCE
SENSE
Red
Black
SOURCE
SENSE
Red
SOURCE
SOURCE
SENSE
SENSE
Black
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