14 GMC-I
Messtechnik
GmbH
4.4.2 DC and AC Currents up to 10 A (Direct Connection)
➭
Disconnect the
power supply to the
measuring circuit
and/or power con-
sumer (R
V
), and dis-
charge all
capacitors, if avail-
able.
➭
Set the range switch
to position
1/10 A or
1/10 A~.
➭
Interrupt the mea-
suring circuit and
safely connect the
measuring leads (without transient resistor!) in series with the power
consumer R
v
. With DC current note the polarity!
➭
Set switch to position „ON“.
➭
Reconnect the power supply to the measuring circuit.
➭
Read the measured value on the V, A scale 0 ... 100.
4.4.3 DC and AC Currents above 10 A with External Shunt
Measurements of cur-
rents above 10 A are
possible with shunts
(R
N
), e.g. 100 A/
100 mV.
➭
Set the range switch
to position 100 mV,
for instance, de-
pending on the volt-
age drop at the shunt.
➭
Then proceed according to chapter 4.4.1.
– (+) /
~
+ (–) /
~
R
V
– /
~
+ /
~
R
V
R
N
