Hioki RM3542-50, Instruction Manual

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Appendix 9 Zero Adjustment
A
18
To perform zero adjustment using a probe
When you actually perform zero adjustment using a probe, you may unexpectedly create 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.
9287-10 Clip Type Lead Here, is used as an example for the explaining the connection.
Table 2 shows the connection state of the tip of the lead and equivalent circuit in the respec-
tive correct and wrong connections. As indicated above, a correct connection method will be
as shown in Table 1 (a), and the voltage between H
POT
and L
POT
will be 0 V. However, a
wrong connection will be as shown in Table 1 (b), and the voltage between H
POT
and L
POT
will not be 0 V.
Table 2: Clip type lead connection methods used during zero adjustment
Connection Methods
Correct Wrong
Tip of lead
Equivalent circuit
Deformed equivalent
circuit
As connection
method for zero
adjustment
Correct Wrong
Red Black Red Black