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Gossen Metrawatt METRAport 40S Manual

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GMC-I Messtechnik GmbH 13
6.1 Transient Overvoltages
The multimeter is protected against transient voltages of up to 4 kV with front
and half times of up to 1.2 and 50 s respectively. Due to the fact that powerful
overvoltages must be reckoned with during measurement, for example in power
systems, at transformers or motors, we recommend the use of our KS30 mea-
suring adapter in such cases. It offers protection against transient overvoltages
of up to 6 kV with front and half times of up to 10 and 1000 s respectively.
Continuous load capacity is equal to 1200 V
eff
. Additional measuring error
due to use of the KS30 measuring adapter amounts to approximately –2%.
6.2 Measuring Voltages of Greater than 300 V
Voltages of greater than 300 V can be measured with a high-voltage measuring
probe, for example the HV3
1)
of the HV30
2)
from GMC-I Messtechnik GmbH.
The bonding terminal must be grounded in this case. Observe all applicable
safety precautions!
1)
HV3: 3 kV
2)
HV30: 30 kV for (DC) voltage only
6.3 Low-Voltage Measurement
The instrument is equipped with a special 30 mV measuring range for measuring
voltage drop at fuses which is distinguished by high resolution (10 V) with a low
input resistance of 50 k.
➭ Set the rotary switch to “Temp RTD”.
➭ Select “V DC” measurement with probe by repeatedly pressing the FUNC
key until “mV DC” appears at the display.
➭ Connect
the probe to the “” and “V” sockets.
7 Current Measurement
➭ First disconnect supply power from the measuring circuit or the power
consumer and discharge all capacitors, if any are present.
➭ Depending upon the type of current, set the rotary switch to “A ” or “A ”.
➭
The symbol for the selected current type, (DC) or ~ (AC), appears at the LCD.
➭ Connect the measuring instrument securely to the power consumer in se-
ries as shown in the diagram (without transition resistor).
black
black
red
x1000
x100
Measuring voltages of greater than 300 V
with the HV3 high-voltage probe
… 13 …


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