i50s
Users Manual
8
Auto Zero
An auto zero of the residual offset is initiated by pressing the AUTO ZERO
button. This should only be performed when the Probe
head is locked, with no
primary conductor.
The auto zero can, however, be made as long as the sum of the primary current
and the offset does not exceed:
•
250 mA in the low range
•
500 mA in the high range
If the above values are exceeded, all the LEDs will flash simultaneously for
five seconds and the Probe will switch back to the state preceding the autozero
request. The autozero function will not be performed.
Degauss
Demagnetizing of the Probe head is performed by pressing the DEGAUSS
button. The Probe must remain locked without a primary conductor. During
this operation, the DEGAUSS
LED lights up for six seconds.
An auto zero of the residual offset is then carried out on both ranges.
Note
During this sequence, all the other controls are disabled.
Indicators
Several messages can appear on the Probe, alerting an abnormal state:
•
UNLOCKED
When the Probe head is not locked, the UNLOCKED
LED lights and
flashes
•
OVERHEATING
The OVERHEATING
LED flashes when a predetermined temperature is
reached; measurement is not possible while in this state. Disconnect the
power supply and wait for the Probe to cool down. Check that the
measured permanent current and the temperature of the primary conductor
do not exceed the maximum permitted values.
Summary of Contents for i50s
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