Hioki 3560 - Effect of Over-Voltage

127
────────────────────────────────────────────────────
10.4 Effect of Eddy Currents
────────────────────────────────────────────────────
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
0.4 Effect of Eddy Currents
The AC current generated in the 3560 induces eddy currents in the
surrounding metallic plates, which generate induced voltage in the
measurement lead. Since the phase of this induced voltage is shifted from
that of the AC current (reference signal) by 180 degrees, it cannot be
eliminated by the synchronous detection circuit, resulting in
measurement errors. The influence of eddy currents is a phenomenon
unique to ohmmeters that measure resistance with AC power. To protect
the measurement lead from such effects, keep metallic parts, including
metallic plates, at a suitable distance from the measurement lead
(branched section).