3B Scientific Analog Multimeter AM50 - Manual (Page 2)

7
lower measurement range.
•
Before using the device, check the
housing and the measurement
cables for any damage.
• Do not conduct measurements in
a damp environment. Workplace,
hands, shoes and floor must be
dry.
•
Before opening the housing all
measurement leads are discon-
nected from the device.
2. Description, technical data
Active analog multimeter with a
slide switch for selection of the op-
erating mode and a rotary switch to
select the measurement range as
well as a scale with the mirrored
background for parallax-free read-
ings with a zero-point adjustable to
the center or the left of the scale.
By adjusting the electrical zero-point
to the center of the scale bipolar DC
voltage and current measurements
can be conducted without worrying
about polarity. The device is ex-
tremely robust in terms of load ca-
pacity and is equipped with excel-
lent overload protection due to its
two anti-parallel diodes as well as
moving coil movement which is not
sensitive to external electromagnet-
ic fields. The safety connection sock-
ets offer protection against acciden-
tal touch contact. After approx. 45
mins the battery is automatically
switched off. The power can be re-
established by turning off and on
using the slide switch for the oper-
ating mode. The robust plastic hous-
ing and the spring-connected bear-
ing jewels of the movement guar-
antee protection against damage
caused by mechanical stress.
Measurement ranges:
Voltage measurement:
DC
Meas. range Internal resistance
100 mV 10 M
Ω
300 mV 10 M Ω
1 V 10 M
Ω
3 V 10 M Ω
10 V 10 M
Ω
100 V 10 M Ω
300 V 10 M
Ω
AC
Meas. range Internal resistance
3 V 1 M
Ω
10 V 1 M Ω
30 V 1 M
Ω
100 V 1 M Ω
300 V 1 M
Ω
Current measurement AC/DC:
Meas. range Voltage drop
0.1 mA 55 mV
1 mA 55 mV
10 mA 55 mV
100 mA 55 mV
1 A 53 mV
3 A 51 mV
Accuracy: DC class 2; AC class 3
Effective variables and nominal op-
erating ranges:
Temperature 0 – 40° C: ± 2% / K
Frequency for all measurement
ranges:
±2.5% at 30 Hz up to
1.5 kHz ± 5% at 1.5 kHz
up to 3 kHz
Reference conditions:
Ambient temperature: +23° C ± 2 K
Frequency: 50 to 60 Hz
Waveform: Sinusoidal