V
V
I
I
P
P
C
C
L
L
A
A
M
M
P
P
M
M
I
I
N
N
I
I
MIN/ MAX Mode:
-Accuracy: same as previous table +0.2% L
-Capture time: 100 ms typ.
3.6 Current measurements
(A)
1.
Set the rotary switch to position
"A "
2.
Clamp the conductor carrying the current to be measured, check for proper closing of the jaws and for foreign
bodies in the gap. For DC, the arrow engraved on the jaws must be directed in the presumed direction of current
circulation for the sign of the displayed value to be significant.
Range switching and AC/DC selection are automatic. Actuate the yellow key to force AC, DC or AC+DC selection
manually if necessary.
Correction of the current measurement zero (DC zero)
To measure the low currents, perform a zero correction first. -Press and hold the HOLD key until zero appears on
the display. The corrected value will then be memorised and subtracted from the value of the current measured later.
Note:
this correction is performed only on the DC component of the zero. If the value measured is higher than 6
A,
this correction is stopped and the memorised correction value is reset to zero.
(1) In DC, the display indicates
+OL
above +400 A and -OL above -400 A (600 A in PEAK mode).
In AC, the display indicates
OL
over 400 Arms (900 V in PEAK mode).
(2) In AC, if the value of the current measured is < 0.15 A, the display shows
0.00.
(3) With correction of zero in DC
- Repeatability of the measurement after several consecutive closings of the clamp: 0.3% typical
§
MIN/ MAX Mode:
- Accuracy: same as previous table +0.2% L
- Capture time: 100 ms typ.
§
PEAK Mode:
- Accuracy: same as previous table +2% L +0.5 A
- Capture time: 500 µs typ. (2.5 ms max.)
3.7 INRUSH function
§
Description
This function is used to follow quick changes in the current, such as a damped sinusoidal quantity, by measuring
the successive rms values calculated on ½, 1, 2½, 5 and 10 periods from the largest rms value computed and
updated on ½ period.
The applications are:
- Measurement of motor start-up currents
- Correct definition of fuses and circuit breakers (signal amplitude-time relationship)
- Stress on components by current overload
The field of application is limited to industrial frequencies (15 Hz... 70 Hz)
Implementation
This function is accessible in AC current measurement only, after selection of the MIN/MAX mode.
Characteristics
Display range
40A
Measuring range(2)
Accuracy (3)
Resolution
0,20 a
39,99 V
40,0 a
3999,9 A
400 A
600A peack
1,5% L
+10 pto
10mA
100mA
1mA
4000
W
40
W
1,5% L +5 pto
5
Press the yellow key
Action
Display
Comments
0,5 P then the value
for rms corresponding
out F
Enter the function
Signal frequency
< 15 Hz o > 70 Hz
Press on HOLD key then
press successively the
yellow key
1P-2,5P-5P-10P-0,5P
with each time
the rms value
corresponding alternately
Consultation of values rms
(computes on of
consecutive periods)
Short pressure
on the MIN/MAX key
Return to values
MIN,MAX or PEAK
Exit from the function
return to MIN/MAX mode
