Iwatsu SS-500 Series Instruction Manual page 42

Preparing for Measurement
What is demagnetization?
The magnetic core can be magnetized, which results
from turning power on and off, inputting an excessively
large current, or other factors. Executing demagnetization
eliminates magnetic charges.
What is automatic zero-adjustment?
Automatic zero-adjustment corrects variations in the offset
voltage caused by factors such as the device-specific
offset voltage and variations in temperature.
When the
execute demagnetization and automatic zero-adjustment.
The DEMAG / AUTO ZERO
following states:
• The power supply to the SS-530/SS-531 just started.
• A current exceeding the rated current was inputted to
the device, but this condition was resolved. (The current
value fell below the rated value or stopped. Otherwise,
the sensor was removed from the conductor under
measurement.)
During demagnetization (with the
LED lit), the device outputs a demagnetization waveform
(which attenuates over time) from its output terminal.
This waveform, which appears on a waveform measuring
instrument, may be asymmetric along the horizontal axis;
however, this does not represent a device malfunction.
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DEMAG / AUTO ZERO LED blinks slowly,
LED blinks slowly in the
DEMAG / AUTO ZERO