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N7026A 150 MHz AC/DC High Sensitivity Current Probes User’s Guide
N7026A Probe
Performing Demagnetization and Zero Offset
Before you Start
1
Set the channel offset to 0V for the oscilloscope channel to which the probe is connected.
2
Ensure that the probe sensor is NOT clamped around a conductor.
3
Slide the probe’s Opening Lever forward into the
Lock
position as shown in the figure below.
The UNLOCK indication on the sensor head disappears when the probe is locked properly.
Figure 6
Lock the sensor head
To perform demagnetization
1
Press the probe’s
De-Gauss
button shown in
Figure 1
on page 7. A demagnetization
waveform will be displayed for a short time on the channel to which the probe is connected.
Wait until this waveform is no longer displayed.
To perform zero offset operation
You can use one of the following methods for the zero offset (Auto Zero routine):
- Press and hold the
De-Gauss
button on the probe for approximately three seconds. This
initiates a degauss operation and then triggers the oscilloscope to perform a zero offset
operation.
- Or use the Probe menu in the Infiniium / InfiniiVision software GUI to automatically
initiate the demagnetization followed by the zero offset operation.
NOTE
Allow both the oscilloscope and probe to warm up for at least 30 minutes
before making these adjustments.
WARNING
DO NOT press the De-Gauss button to perform demagnetization while the
conductor being measured is clamped. Doing so can damage the circuitry or
cause an accident.
