Chapter II
32
Portable digital multimeter
Curve showing typical measurement error (5 V, 50 V, 500 V ranges)
1000 pts
1 kHz
10 kHz
100 kHz
Vin = 100 % F.S.
Vin = 50 % F.S.
Vin = 15 % F.S.
50000 pts
25000 pts
7500 pts
2500 pts
1%
5%
10%
2%
Vin = 5 % F.S.
5.3.
DC current
Selector
switch pos.
Ranges
Accuracy
Max volt.
drop Protection
Fuses
∗
Resolution
500 µA
0.2%R + 5 D
10 nA
5 mA
0.2%R + 2 D
100 nA
50 mA
0.05%R+ 2 D
700 mV
1 µA
µA mA
500 mA
0.2%R + 2 D
1.5 V
F1 + F2
10 µA
10 A
∗∗
10 A
0.5%R + 5 D
500 mV
600 V
RMS
F2
1
mA
∗
refer to fuse specifications, §. 6.1.1.
∗∗
acceptance 20 A overload during 30 s. max, observing a 5 min break at least between two
measurements
Number of counts :
50 000 (or 5 000, refer to §. 3.4)
Range selection :
automatic or manual for the 500 µA, 5 mA, 50 mA, 500 mA ranges
Additional error in Pk +/- mode for a pulse width of
≥
1 ms : 1% R ± 50 D
For measurements performed on alternative signals, the selected range must tally with the max.
value of the signal peak.
5.4.
AC currents (AC and AC+DC)
Accuracy
40 Hz to
5 kHz
5 to 10 kHz 10 to 30 kHz
Ranges
5 % to 100 % of range
Protection
Fuses
∗
Resol.
Max.
crest
500 µA
0,75 % R
+ 30 D
1,5 % typ.
4 % typ.
10 nA
1 mA
5 mA
1,5 % typ.
4 % typ.
100 nA
10 mA
50 mA
0,6 % R
+ 30 D
1,5 % typ.
4 % typ.
1 µA
100 mA
500 mA
0,7 % R
+ 30 D
1,5 % typ.
4 % typ.
F1 + F2
10 µA
1 A
10 A
∗∗
1%R+30D
Æ
2 kHz
1,5 % typ.
////////////
600 V
RMS
F2
1 mA
30 A
∗
refer to fuse specifications, §. 6.1.1.
∗∗
acceptance 20 A overload during 30 s. max, observing a 5 min break at least between 2
measurements