Chapter II
34
Portable digital multimeter
5.7. Diode
threshold
voltage measurement
Measurable voltages :
0 to 2 V
Measurement current :
1 mA typical
Resolution :
1 mV
Protection :
600 V
RMS
, can be reset automatically
5.8. Frequencies
Selector switch setting :
V
AC
, mV, V
DC
, mA, 10 A
Measurement range :
0.62 Hz to 500 kHz
Accuracy :
0.03 %
Protection :
600 V
RMS
in V
AC
, mV, V
DC
modes
600
V
RMS
(F1 + F2) in mA mode
600
V
RMS
(F2) in 10 A mode
Display :
50 000 counts
SENSITIVITY
Ranges
500
mV
5 V to 500 V
500 µA to 500 mA
600 V
10 A
0.62 Hz to 5 kHz
∗
2 % of range
100 V
5 kHz to 50 kHz
5 % of range
250 V
50 kHz to 500 kHz
/////////////
10 % of range
/////////////
2 A
∗
rectangular signal
Additional positive limit in DC : + 3 % of range, except in 600 V
DC
range (150 V additional)
and in 10 A
DC
(1.5 A additional)
5.9.
Duty cycle %+, %-
θ
T
θ
T
% - =
θ
T
x 100
% + =
θ
T
x 100
Resolution :
0.01%
Minimum duration for
θ
or T -
θ
: 2 µs
Maximum duration for T :
0.8 s
Minimum duration for T :
100 µs
Absolute error on duty cycle as a % :
310
4
.
−
T
Sensitivity : refer to sensitivity in frequency measurement mode
Absolute additional error on
θ
, due to the zero crossing slope : 0.1 x 0.1 x
C
P
with C :
V or A range (C = 5000 V for 600 V
DC
or 600 V
AC
ranges
and C = 50 A for 10 A ranges)
with P :
slope in V/s or in A/s