Hioki RM3542, Instruction Manual, Page: 208 / 218

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
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, 9287-10 Clip Type Lead 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 correct and wrong connections. Table 1 (a) indicates the correct
connection method, resulting in 0 V between H
POT
and L
POT
. However, Table 1 (b) is
the wrong connection method, so that 0 V is not obtained between H
POT
and L
POT
.
Table 2: Clip type lead connection methods used during zero adjustment
Connection method
Correct
Wrong
Tip of lead
Equivalent circuit
Deformed equivalent
circuit
As connection
method for zero
adjustment
Correct Wrong
Red Black Red Black