Hioki Power HiTester 3193, Instruction Manual

Page: 75 / 310

57
────────────────────────────────────────────────────
4.13 Degaussing
────────────────────────────────────────────────────
SHIFT
RANGE
U
I
NOTE
4.13 Degaussing
When a large DC current or large transient current is measured with the
9600
AC/DC DIRECT INPUT UNIT
or an AC/DC type of current sensor for
the 9602
AC/DC CLAMP INPUT UNIT
, the internal DC-CT may become
magnetized, thus outputting an offset even for a zero input. Use the
degaussing function if this occurs, and also before measurement after
warming-up.
45-1.tif
1. Display the channel screen for which degaussing is
desired.
2. Press the
SHIFT
key once, then press the current
range
-
key.
3. A degaussing message appears on the screen. "Will
now degauss"
Pressing
F1
(
YES
) starts degaussing, and
F2
(
NO
) does not degauss and the message goes off.
4. The degaussing operation is completed in about 10
seconds.
･
Carry out degaussing when the input current is zero.
･
This function is not available for AC direct input units and AC current
sensors.
･
The specification accuracy applies only after degaussing.
･ The degaussing function operates once after powering on.
･
For channel combinations of 1P3W and above, degaussing takes place
simultaneously for all channels in the combination.
･
In extreme cases, for example, when there is an input of the maximum input
current or above, complete degaussing may not be possible. In this case,
power the unit off and on again.