
Connecting the TDR9000
™
Physical Front Panel
4-36
72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Self-Zeroing Probe
The probe must be re-zeroed whenever a new Test Plan is loaded or a
channel is reactivated.
N
OTE
To conserve battery power, Doble’s MR 20 A/200 A/ 2 V Autozero
probe powers down after ten minutes. To disable this feature, when
turning the probe on, press the
Zero
button. The green LED flashes
several times to indicate the battery saver feature is disabled.
To zero the probe:
1.
Connect and zero the current probe by:
a. Taking appropriate safety precautions, plug the Instrument
end of the probe cable into the desired
Analog Channel
Connector
.
The
Analog
channel inputs are polarity sensitive.
Make sure to attach the shield (green/yellow) banana plug to
the chassis ground (green/yellow) banana jack on the Event
module.
b. Plug the free end of the
Analog
cable into the current probe.
c. Click the
Probe Zero
button on the Virtual Front Panel.
The following message displays on the Virtual Front Panel:
Adjust probe until tone becomes constant. The process will
end automatically when the probe is correctly adjusted for
2 seconds.
d. Turn the probe on by setting the selector switch to the desired
range.
N
OTE
Make sure that the probe is not attached to, or placed near,
current-carrying wires during the zeroing process.
e. Press the
Probe Zero
button on the probe.
When the probe reaches zero offset, the tone becomes steady.
If zero offset is maintained for two seconds, the tone stops and
the channel indicator turns green.
f. Repeat this procedure for any additional probes.
Содержание TDR9000
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