Cf : Crest Factor; Peak : Peak Value; Hz : Frequency; Thd : Measurement Of Harmonics - Chauvin Arnoux F23 Mode D'emploi

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4.10 CF : Crest factor

Accessible on voltage and current
Reminder :
- the crest factor CF = PEAK value
- for reference, a sinusoidal signal has a CF of 1.414.

4.11 PEAK : Peak value

- The current PEAK value (100 ms) corresponds to the average of the 4 greatest 100 ms samples, of the
same sign.
- When PEAK is selected, the
sign (see figures A, B and C). If these buttons are not pressed, the PEAK value displayed corresponds to
the greatest absolute value measured, positive or negative.
NB : The PEAK MAX value (≥ 2 ms) is accessible in RECORD mode.

4.12 Hz : Frequency

- Press this button briefly once : Hz is displayed
The top display gives the frequency of the current or the voltage measured.
- A second press : return to the previous function.
NB : On power measurement, it is the frequency of the voltage which is measured.

4.13 THD : Measurement of harmonics

The THD button allows, by successive presses, measurement of the Total Harmonic Distortion, the Distortion
Factor, and return to the main function, AC current or voltage.
NB : The THD button is only active for A and V.
If measurement in harmonics is impossible (fundamental frequency outside of the operating range) the
displays indicate an indeterminate value (- - - -).
RMS value
Figures A, B and C: Peak value with ± sign:
Figure A: AC signal
A or V
PEAK +
(>0)
0
-
PEAK
(<0)
Figure B: Signal with positive DC component
A or V
PEAK + (>0)
-
PEAK (>0)
0
Figure C: Signal with negative DC component
0
PEAK +
(<0)
-
PEAK
(<0)
A or V
buttons make it possible to respectively allocate the "+" and the " _ "
and
THD button : A AC or V AC → THD → DF
PEAK + and PEAK -
PEAK MAX +
(>0)
t
-
PEAK MAX
(<0)
PEAK MAX +
(>0)
-
PEAK MAX
(>0)
t
t
PEAK MAX +
(<0)
-
PEAK MAX
(<0)
↑
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