Hioki 3285-20, Instruction Manual, Page: 52 / 85

31 _______________________________________________________
2.4 Frequency Measurement
_______________________________________________________
SLOW PEAK FAST
(The unit
symbol blinks.)
Hz NORMAL
NOTE
2.4 Frequency Measurement
2.4.1 Frequency Measurement in Current Mode
1. Press button and select AC or AC+DC ,
depending on the circuit to be measured.
2. If the current range of the measured circuit is
known, set the current range to the manual range.
3.
SLOW/PEAK/Hz
button switches the annunciators
as follows. Select Hz by pressing the button. (The
unit symbol
A blinks, and a current value is
displayed on the bar graph.)
4. Switch the auto range and the manual range as
necessary.
5. Open the top ends of the clamp core and clamp the
measured conductor so that it passes through the
center of the clamp core.
At the 100 Hz and 1000 Hz ranges,
----
appears on
the counter when the frequency is lower than 10 Hz.
----
appears on the counter, if the frequency is lower
than 1 Hz.
O. L.
appears on the counter, if the frequency is
higher than 1 kHz.
If an input value is significantly lower than the range,
an accurate measurement may not be achieved,
resulting in
----
,
O. L.
or display fluctuations.