Datasheet
METRAport 3A
Folding Analog Multimeter
2 GMC-I Messtechnik GmbH
Characteristic Values
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
3)
Protected with PTC resistor
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
Accuracy under Reference Conditions per IEC 60051/EN 60051
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.
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
full scale value in the following ranges:
Auxiliary voltage No additional influence error. The upper
limit must be set with the potentiometer for
all measuring ranges in the case of
resistance measurement.
Series-mode interference
voltage damping For V : > 60 dB, AC 50 Hz
For V
~: > 120 dB, DC
Common-mode interference
voltage damping > 120 dB, DC and 50 Hz AC
Other influencing
quantities per IEC 60051/EN 60051
Power Supply
Battery operation Nominal voltage: 9 V ,
9 V flat cell battery per IEC 6LR61 (6F22),
alkaline manganese or NiMH rechargeable
battery.
Battery service life With alkaline manganese: approx. 1000
hours, with NiCd: approx. 200 hours, in
the x 1 range: ¼ of specified service life
Battery test Pointer must be within the battery test
field.
Voltage
1)
Level
2)
Input
Resistance
R
i
Overload
Protection
to
3)
Constant Measuring Span
100 mV -20 dB -40 ... ÷ 1 8 dB
10 M / /
50 pF
600 V
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
Range
Current at
Upper Range Limit
R
i
100 mV 10 nA
10 M
300 mV 30 nA
1 V 100 nA
3 V 300 nA
10 V 1 μA
30 V 3 μA
Current
Input
Resistance R
i
Voltage Drop
U
Overload Protection
to
10 μA 10.0 k 100 mV 600 V
3)
100 μA 1.0 k 100 mV 600 V
3)
1 mA 100.0 100 mV 600 V
3)
10 mA 10.0 100 mV 600 V
3)
100 mA 1.4 140 mV 600 V
3)
1 A 480 m 0.480 V 600 V
3)
1 0 A 26 m 260 mV 600 V
4)
Resistance
Range
Reading Range
Value at
Scale
Middle
(R
i
)
Open-
Circuit
Voltage
U
0
Short-
Circuit
Current
I
K
Overload
Protec-
tion
to
x1 1 ... 2 k 45.6 100mV 2.2 mA
600 V
3)
x10 10 ... 20 k 456.0 100mV 0.22mA
600 V
3)
x 100 100 ... 20 0 k 4.56 k 100mV 22 μA
600 V
3)
k x1 1k ... 2 M 45.6 k 1V 22μA
600 V
3)
k x10 10k ... 20 M 456.0k 1V 2.2μA
600 V
3)
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