Hioki 3286-20, Инструкция по эксплуатации

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Chapter 2 Measurement Procedure
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NOTE
1
φ
P
or
1
φ
PF
3
φ
PF
1
φ
HARM I
1
φ
HARM U
2.5 Harmonic Measurement
2.5.1 Current Harmonics
For measurement extending the auto power-off time,
use the recording function.
To check variations in a peak value, enable the
REC function by pressing the
MAX/MIN
key, then
activate peak value display mode by pressing the
I/
key.
Automatic frequency detection (AUTO), 50 Hz
fixed, or 60 Hz fixed can be selected. In cases
where the input fluctuates significantly, the
indicated value will stabilize when 50 Hz or 60 Hz
fixed is selected. For how to select, see the setup
of measurement line frequency in SETUP mode.
(For details, see 2.9, "SETUP Function.")
There is a possibility to fluctuate 2 or 20 counts at
the peak value display when the input becomes big.
Some special frequencies can't be measured, such as
those of inverters.
1. Press the LINE/HARM key to activate harmonic
current display mode.
2. Switch between Auto Range and Manual Range, as
needed. For details, see 2.3, "Range Setup."
3. Open the tip of the clamp core and clamp the
conductor roughly into the center of the clamp core.
4. Press the
I/
and
U/
keys to select the order of
harmonics to be measured.