3B SCIENTIFIC PHYSICS AM51, Instruction Sheet

Page: 2 / 6

2
•
Before opening the housing all measure-
ment leads are disconnected from the de-
vice.
•
Do not dispose of the battery in the regular
household garbage. Follow the local regula-
tions.
1.1 Symbol legend
Hazard, read instruction sheet
V
Voltage
A
Current
Moving coil galvanometer
AC/DC quantities accuracy class 2,5
Use in horizontal position
DC quantities
AC quantities
CAT Measuring category as per IEC EN
61010-1
Double insulated casing
CE EU conformity mark
Earth symbol
┴ Ground symbol
Battery symbol
2. Description
Handheld meter used to measure current, volt-
age and resistance as well as gain levels or
attenuation e.g. in chains of quadripoles.
Passive analog multimeter with a rotary switch
for selecting the measurement ranges and a
scale with mirrored background for parallaxfree
readings. The device is extremely robust in
terms of load capacity and is equipped with ex-
cellent overload protection due to its two anti-
parallel diodes as well as moving coil move-
ment, which is not sensitive to external electro-
magnetic fields. The safety connection sockets
offer protection against accidental touch contact.
The robust plastic housing and the spring-
connected bearing jewels of the movement
guarantee protection against damage caused by
mechanical stress.
3. Technical data
Measurement ranges:
Voltage measurement:
DC
Measurement range Internal resistance
100 mV 2 k Ω
1 V 20 k Ω
10 V 200 k Ω
30 V 600 k Ω
100 V 2 M Ω
300 V 6 M Ω
600 V 12 M Ω
AC
Measurement range Internal resistance
10 V 66.7 k Ω
30 V 200 k Ω
100 V 667 k Ω
300 V 2 M Ω
600 V 4 M Ω
Current measurement:
DC
Measurement range Voltage drop
50 µA 100 mV
1 mA 500 mV
10 mA 500 mV
100 mA 500 mV
1 A 590 mV
AC
Measurement range Voltage drop
3 mA 1.5 V
30 mA 1.6 V
300 mA 1.6 V
3 A 1.8 V
Widerstandsmessung:
Rotary
switch
Measurement range
and scale centre
Max. meas.
current
Ω x 1 1 Ω ...35 k Ω ...5 k Ω 45 mA
Ω x 10 10 Ω ...350 k Ω ...50
k Ω
4.5 mA
Ω x 100 100 Ω ...3.5 k Ω ...500
k Ω
0.45 mA
Accuracy:: Class
2.5
Influencing variables and nominal operating
ranges:
Temperature 0 – 40° C:
± 1% / 10 K for DC
± 2.5% / 10 K for 100 mV/50 µA DC
± 1.5% / 10 K for AC
Frequency (30 Hz...1 kHz): ± 2.5%