User manual

14 GMC-I Messtechnik GmbH
• Eliminate the cause of overload after the fuse or breaker is tripped before
placing the instrument back into service!
Attention!
!
If the secondary side of the current transformer with voltage output
remains open during operation, e.g. if cables are defective or have not
been connected, or due to a blown device fuse or incorrect
connection, dangerous voltages may occur at the terminals.
Note!
Motors with high starting current cause tripping of the circuit breaker,
except for measurement with clamp meters.
7.1 Current Measurement with Current (Clamp) Sensors with Voltage Output
If a current sensor is connected to the multimeter, all current values are displayed
correctly in consideration of the transformer ratio. This presupposes that the cur-
rent sensor is equipped with the required sensitivity, and that the
appropriate ratio is selected before measurement is performed.
➭ Turn the rotary switch to the position
.
➭ Select a current type, A (DC) , A ( ) (AC+DC), Hz, RPM Upm1
or Upm2 (see below) , by pressing the FUNC key.
➭ Simultaneously press the FUNC and the MAN/AUTO keys. The currently
selected transformation ratio is displayed. The transformer ratio can be
changed by pressing the MAN or the DATA key, or the currently selected value
can be retained by pressing the FUNC key.
➭ Connect the current (clamp) sensor to the and the  jacks.