Hioki 3286-20, Instruction Manual

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Chapter 2 Measurement Procedure
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1
φ
P
or
1
φ
PF
3
φ
PF
1
φ
HARM I
1
φ
HARM U
I/ key
U/ key
1st order 2nd order - - - - 20th order
20th order 19th order - - - - 1st order
MODE key
THD-R THD-F Content
NOTE
2.5.2 Voltage Harmonics
1. Press the
LINE/HARM
key to activate harmonic
voltage display mode.
2. Connect the voltage cord to the instrument, then
connect the red cord and black cord to the circuit
under measurement.
3. Switch between Auto Range and Manual Range, as
needed. For details, see 2.3, "Range Setup."
4. Press the
I/
and
U/
keys to select the order of
harmonics to be measured.
5. Switch between the total harmonic distortion ratio
(THD-R, THD-F) and harmonic percentage, as
needed, by pressing the
MODE 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.")
For automatic frequency detection, the instrument
performs FFT operations only when the fundamental
wave is covered within the 45 to 65 Hz range. The
instrument does not perform FFT operations outside
this range.