GOSSEN METRAWATT METRAport 3A User Manual
METRAport3A
Folding Analog Multimeter
• 9 voltage measuring ranges, V :
100 mV, 300 mV, 1 V, 3 V, 10 V, 30 V, 100 V, 300 V and 600 V
• 7 current measuring ranges, A :
10 µA, 100 µA, 1mA, 10 mA, 100 mA, 1 A and 10 A
• 5 resistance measuring ranges: 1 Ω ... 2 kΩ/ 10 Ω ... 20 kΩ/
100 Ω ... 200 kΩ/ 1 kΩ ... 2 MΩ/ 10 kΩ ... 20 MΩ
• 9 level measuring ranges: -40 dB ... +62 dB
• High input resistance of 10 MΩ
for no-load voltage measurement
• Reflective scale in folding lid which can be tilted for easy
reading and provides transport protection as well,
accuracy class 1.5 =
• Overload protection: 600 V
in all functions and range settings
•Automatic battery shutdown when instrument is folded closed
3-349-302-03
1/4.04
300 V CAT III
600 V CAT II
IEC/EN 61010-1, second edition
Applications
The multimeter is equipped with an indicator display and an
electronic amplifier. It can be used in a wide variety of practical
electronics applications, for example in R&D, manufacturing,
equipment operation, in the test lab and for service calls, as well
as for training and vocational education.
Description
The multimeter has 46 measuring ranges for direct and
alternating voltages of up to 600 V, alternating voltage levels from
-40 to +62 dB, direct and alternating current of up to 10 A and
resistances of up to 20 MΩ. It has a constant input resistance of
10 MΩ in all voltage measuring ranges.
The multimeter is calibrated in RMS values for periodic sinusoidal
quantities. It makes use of full-wave rectification for the evaluation
of the arithmetic mean value.
All measuring ranges can be selected with the central measuring
range selector switch. The ranges are laid out in a clear-cut
fashion around the selector switch.
The measuring device and the display unit are enclosed in two
separate housing components which are connected to each
other by means of a hinge which can be snapped into various
positions. In this way, the ideal angle for ease of reading can be
selected with the instrument in any position.
Several well coordinated safety devices protect the instrument
against damage caused by incorrect operation and overloading
within the specified overload limit values:
• Oversized precision resistors
• Fuse link in combination with protective rectifier diodes
• Overvoltage arrester / positive temperature coefficient
resistors (PTCs)
The instrument can be operated independent of mains current
with a commercially available 9 V flat cell battery. Long battery
service life is assured thanks to the minimal current consumption
of the instrument’s electronic components.
The multimeter’s rugged design provides for outstanding
protection where harsh mechanical stressing prevails. When
folded together, the instrument is provided with extra mechanical
protection for the measuring device, as well as for the display unit.
The connector jacks are protected against accidental contact.
Suitable measurement cables with 4 mm test probes are included
as standard equipment.
Applicable Regulations and Standards
IEC/EN 61010-1:2001
VDE 0411-1:2002
DIN EN 61326
VDE 0843, part 20
DIN EN 60529
DIN VDE 0470, part 1
Safety requirements for electrical equipment for
measurement, control and laboratory use
Electrical equipment for control technology and
laboratory use – EMC requirements
Test instruments and test procedures
– Degrees of protection provided by enclosures (IP code)
GOSSEN METRAWATT GMBH
METRAport3A
Folding Analog Multimeter
Characteristic Values
2)
Current at
Input
Level
i
Voltage Drop
Value at
Scale
Middle
(R
)
i
1)
Voltage
100 mV -20 dB -40 ... ÷ 1 8 dB
300 mV -10 dB - 30 ... ÷ 8 dB 600 V
1 V 0 dB - 20 ... + 2 dB 600 V
3 V + 10 dB - 10 ... + 12 dB 600 V
10 V +20 dB 0 ... + 22 dB 600 V
30 V +30 dB + 10 ... + 32 dB 600 V
100 V +40 dB + 20 ... + 42 dB 600 V
300 V +50 dB + 30 ... + 52 dB 600 V
600 V +60 dB + 40 ... + 62 dB 600 V
1)
The 100 mV to 10 V measuring ranges can also be used for current measurement
in accordance with the following table (e.g. reverse current or insulation current).
These measuring ranges are rated at accuracy class 5. Frequency range
at
~: 15 ... 100 Hz.
Same overload protection as for voltage measuring ranges.
2)
Measured value = displayed value + constant, 0 dB 0.775 V, i.e. 1 mW at
600 Ω
3)
Protected with PTC resistor
Range
100 mV 10 nA
300 mV 30 nA
1 V 100 nA
3 V 300 nA
10 V 1 µA
30 V 3 µA
Current
10 µA 10.0 kΩ 100 mV 600 V
100 µA 1.0 kΩ 100 mV 600 V
1 mA 100.0 Ω 100 mV 600 V
10 mA 10.0 Ω 100 mV 600 V
100 mA 1.4 Ω 140 mV 600 V
1 A 480 mΩ 0.480 V 600 V
1 0 A 26 mΩ 260 mV 600 V
Resistance
Range
Ω x1 1Ω ... 2 k Ω 45.6 Ω 100mV 2.2 mA 600 V
Ω x10 10Ω ... 20 k Ω 456.0Ω 100mV 0.22mA 600 V
Ω x 100 100 Ω... 200 k Ω 4.56 kΩ 100 mV 22 µA 600 V
kΩ x1 1kΩ ... 2 MΩ 45.6 kΩ 1 V 22 µA 600 V
kΩ x10 10kΩ... 20 MΩ 456.0kΩ 1 V 2.2 µA 600 V
3)
Protection by means of FF 1.6A/600V AC fuse link in combination with rectifier
diodes.
4)
FF 16A/600V fuse link, 10 A: max. 10 minutes
Constant Measuring Span
Upper Range Limit
Resistance R
Reading Range
Accuracy under Reference Conditions per IEC 60051/EN 60 051
Class 1.5 for zero-frequency quantities, class 2.5 for periodic
sinusoidal quantities and class 1.5 for resistance (intrinsic error
relative to 69 mm scale length) corresponding to max. 10%
intrinsic error of the measured value within the range of the
exaggerated scale arc.
10 MΩ
∆U
Input
Resistance
10 MΩ / /
50 pF
R
i
Open-
Circuit
Voltage
U
0
Overload
R
i
Protection
600 V
Overload Protection
to
ShortCircuit
Current
I
K
3)
to
3)
3)
3)
3)
3)
3)
4)
Overload
Protec-
tion
to
Reference Conditions
Ambient temperature + 23° C ± 2 K
Relative humidity 40 ... 60%
Normal position
of use Instrument and scale horizontal ±1°
Measured quantity
frequency 45 ... 65 Hz
Measured quantity
waveshape
Si
ne
Battery voltage 7.5 V ±0.1 V
Other influencing
quantities per IEC 60051/EN 60051
Influencing Quantities and Nominal Ranges of Use
Temperature +5 ... +23 ... + 35° C
Limiting temperatures For accuracy +5 ... + 35° C
For operation 0 ... +40° C
For storage - 25 ... +65° C
(without batteries)
Position Additional influence error of max. ±1% of
the scale length if the scale is tilted
between 0 and ±120° relative to horizontal
Frequency Additional influence error of max. ± 5% of
Auxiliary voltage No additional influence error. The upper
Series-mode interference
voltage damping For V : > 60 dB, AC 50 Hz
Common-mode interference
voltage damping > 120 dB, DC and 50 Hz AC
Other influencing
quantities per IEC 60051/EN 60051
3)
Power Supply
3)
Battery operation Nominal voltage: 9 V ,
3)
3)
3)
Battery service life With zinc-carbon: approx. 500 hours, with
Battery test Pointer must be within the battery test
full scale value in the following ranges:
100 mV, 3 V ... 600 V: 15 Hz ... 1 kHz
10 µA ... 10 A: 15 Hz ... 1 kHz
300 mV, 1 V: 15 Hz ... 200 Hz
limit must be set with the potentiometer for
all measuring ranges in the case of
resistance measurement.
For V
~: > 120 dB, DC
9 V flat cell battery per IEC 6LR61 (6F22),
alkaline manganese, zinc-carbon or NiCd
rechargeable battery.
alkaline manganese: approx. 1000 hours,
with NiCd: approx. 200 hours, in the Ω x 1
range: ¼ of specified service life
field.
2 GOSSEN METRAWATT GMBH
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