GOSSEN METRAWATT 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
µ
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
µ
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 GOSSEN METRAWATT 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
7
Current Measurement
➭
First disconnect supply power from the measuring circuit or the power
consumer and discharge all capacitors, if any are present.
➭
Select range A with the rotary switch for currents of greater than 300 mA, or
range mA for currents of less than d 300 mA.
Always start with measuring
range A
when measuring current of an unknown magnitude.
➭
Select the current type which corresponds to the measured quantity by
briefly pressing the
FUNC
key. Each time the key is pressed, the instrument is
alternately switched back and forth between (DC) and ~ (AC), which is
acknowledged with an acoustic signal. The symbol for the selected current
type, (DC) or ~ (AC), appears at the LCD. Direct current ( ) is always
active immediately after the instrument is switched on, and after range
selection with the rotary switch.
➭
Connect the measuring instrument securely to the power consumer in
series 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
