
TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01
4-65
Monday
, November 26, 2001 1:09 pm
•
Trigger In
trigger
This is when the trigger comes in through the
Trigger In connectors of the System module.
This selection automatically activates the
channel for recording.
Timing Event
This picklist is used to select the change in contact
status that causes the trigger and initiates data
recording. Choices available depend on the
Trigger
Source
and are outlined in Table 4.7.
Trigger Channel
This picklist is used to select the channel
configured to accept the trigger input. It is only
active when
AUX
Contact
is in use for the
Trigger
Source
. The number of channels available depends
on the number of Event modules in the TDR9000.
Pre-Trigger
This user-entered field sets the length of time, in ms
or cycles, prior to a triggering event for which data
is retrieved from the circular buffer. The TDR9000
is able to do this because it continually records
data once the Continue button is clicked for an
external trigger test. The pre-trigger time is
subtracted from the total recording time; the
overall recording time does not change.
Time Display
These two radio buttons toggle the time units
between ms and cycles.
Table 4.7 Trigger Input Timing Events
Trigger Source
Timing Events Available
AUX Contact
• Open to Close
• Close to Open
• Volts On to Off
• Volts Off to On
Trigger In
• O
→
C or On
→
Off
(Open to Close or Volts On to Volts Off)
• C
→
O or Off
→
On
(Close to Open or Volts Off to Volts On)
Содержание TDR9000
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