7
Description of Parts
1
Opening lever
Operating lever for opening the sensor head. Always use this lever to
open the sensor head.
2
Sensor head
This clamps the conductor being measured, and carries out the actual
current measurement. It is a precision assembly including a molded
component, a ferrite core, and a Hall effect element. It may be damaged
if subjected to sudden changes in ambient temperature, or mechanical
strain or shock. Care should be exercised when handing the sensor head.
3
Demagnetizing switch (DEMAG)
This demagnetizes the core if it has been magnetized by switching the
power on and off, or by an excessive input. Always carry out
demagnetizing before measurement. The demagnetizing process takes
about one second. During demagnetizing, a demagnetizing waveform is
output.
4
Zero adjustment dial (ZERO ADJ)
Use the zero adjustment dial to correct for the effect of a voltage offset
or temperature drift on the unit. The probe should be always be zeroed
after demagnetization.
5
Coarse adjustment trimmer
This adjustment should only be carried out if the probe offset is outside
the range of the zero adjustment dial.
Current direction indication
"UNLOCK" indication
Sensor
Terminator
Sensor cable
1
2
3
4
5
Summary of Contents for 1147A
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