Chapter II
Portable digital multimeter
29
5.6. Capacitance
)
Note
Discharge all capacitors before taking measurements.
Ranges Accuracy
Measurement
current
Max measurement
time
Protection
∗
Resolution
50 nF
∗∗
100 nA
10 pF
500 nF
1 µA
100 pF
5 µF
10 µA
1 nF
50 µF
100 µA
0.5 s
10 nF
500 µF
1% R + 2D
1.5 s
100 nF
5000µF
3 s/mF
1 µF
50 mF
2% R + 2D
1 mA
3 s/mF
600 V
RMS
10 µF
∗
Overload protection can be reset automatically.
∗∗
It is highly recommended to use very short and shielded test leads for measurements in
this range.
Number of count :
5000
Range selection :
automatic or manual
Maximum open circuit voltage :
7 V
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
+ SEL/ON
Measurement range :
0.62 Hz to 500 kHz
Accuracy :
0.03 %
Protection :
600 V
RMS
Display :
50.000 count
Range
Sensitivity
5 V to 500 V
600 V
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
////////////////
∗
Rectangular signals
5.9.
Duty cycle %+, %-
θ
T
θ
T
% - =
θ
T
x 100
% + =
θ
T
x 100
Resolution : 0.01 %
Min. duration for
θ
or T-
θ
: 2 µs
Max. duration for T : 0.8 s
Min. duration for T : 100 µs
Absolute error as a % :
T
4
10
.
3
−
Sensitivity : see frequency measurement mode
Absolute additional error on
θ
, due to the zero crossing slope :
0.1 x
P
C
with C : range in V (C = 5000 V for 600V
DC
or 600 V
AC
ranges)
with P : slope in V/s
