Operation Manual

GOSSEN-METRAWATT 7
Response time
Response time for 12S ... 16S, 14A (after manual range selection)
Power supply
Battery 9-V flat cell battery;
manganese-dioxide cell according
to IEC 6 F 22,
alkaline-manganese cell according
to IEC 6 LR 61
or corresponding NiCd storage battery
Operating time With alkaline-manganese cell:
METRAHit 12...16S, 14A:
approx. 750 hours on V , A
approx. 200 hours on V , A
(12S...15S, 14A)
approx. 150 hours on , A (16S)
with interface operation times x 0.7
METRAHit 18S:
approx. 300 hours on V
approx. 150 hours on V , A A
Battery test Automatic display of the „ ” symbol,
when the battery voltage drops below
approximately 7 V.
Fuses
Fuse link for the
ranges up to 300 mA FF 1.6/500 G; 6.3 mm x 32 mm;
switching capacity 20 kA on 500 V and
ohmic load; in connection with power
diodes protects all current measuring
ranges up to 300 mA
Fuse link for ranges
up to 10 A Switching capacity 100 kA on 600 V
and ohmic load; protects the 3 A and 10 A
ranges up to 600 V
Response time for 18S (after manual range selection)
Electrical safety
Protection class II according to IEC 348/DIN VDE 0411 and
IEC 1010-1/EN 61010-1/VDE 0411-1
Overvoltage category II III
Nominal voltage 1000 V 600 V
Degree of pollution 2 2
Nominal
insulation voltage 1000 V acc. to IEC 348 / DIN VDE 0411
Test voltage 6 kV~ acc. to IEC 348 / DIN VDE 0411
Electromagnetic compatibility EMC
Emission EN 50081-1:1992 /
EN 55022:1987 class B
Immunity EN 50082-1:1992
/ IEC 801-2:1991 8 kV air discharge
/ IEC 801-3:1984 3 V/m
/ IEC 801-4:1988 0.5 kV
Data interface
Type RS-232C, serial, according to DIN 19 241
Data transmission Optical, with infrared light through the case
Baud rate 8192 bit/s
Influence
quantity
Influence range
Meas. ranges
12S ... 16S
Damping
Common
mode voltage
Disturbance variable max. 1000 V V > 120 dB
Disturbance variable max. 1000 V
50 Hz, 60 Hz sinusoidal
3V ,
30 V
>80dB
300 V >70dB
1000 V >60dB
Normal
mode voltage
Disturbance variable V ,
nom. value of meas. range at a time,
max. 1000 V , 50 Hz, 60 Hz
sinusoidal
V > 50 dB
Disturbance variable max. 1000 V V > 110 dB
Measured quantity/
measuring range
Response time
Leap function of
the measured quantity
of analog
indication
of digital
display
V, V,
A , A
0.7 s 1.5 s
from 0 to 80 %
of the upper range limit
30 Ω...3MΩ 1.5 s 2 s
from ∞ to 50 %
of the upper range limit
30 MΩ 4s 5s
0.7 s 1.5 s
nF, µF, °C max. 1... 3 s
from 0 to 50 %
of the upper range limit
300 Hz, 3 kHz max. 2 s
30, 100 kHz max. 0.7 s
% (1 Hz) max. 9 s
% (≥10 Hz) max. 2.5 s
Influence
quantity
Influence range
Meas. ranges
18S
Damping
Common
mode voltage
Disturbance variable max. 1000 V V > 120 dB
Disturbance variable max. 1000 V
50 Hz, 60 Hz sinusoidal
300 mV ...
30 V
>80dB
300 V >70dB
1000 V >60dB
Normal
mode voltage
Disturbance variable V ,
nom. value of meas. range at a time,
max. 1000 V , 50 Hz, 60 Hz
sinusoidal
V > 48dB
Disturbance variable max. 1000 V V > 110dB
Measured quantity/
measuring range
Response time
Leap function of
the measured quantity
of analog
indication
of digital
display
V, V,
A , A
0.7 s
1.5 s
300 mV : 8 s
from 0 to 80 %
of the upper range limit
300 Ω ... 3MΩ 1.5 s 2 s
from ∞ to 50 %
of the upper range limit
30 MΩ 4s 5s
0.7 s 1,5 s
3 nF ... 300 µF max. 2s max. 2s
from 0 to 50 %
of the upper range limit
3 000 µF max. 7 s max. 7 s
10 000 µF max. 14 s max. 14 s
>10 Hz max. 1.5 s max. 1.5 s
°Cmax. 3s
Analog-digital multimeters
METRA 12S ... 18S, 14A