doble TDR9000, User Manual, Page: 238 / 454

Test Plan Items
A-38 72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Test Initiation Timing a Close test from test initiation is achieved using the Close Pulse
and Timing Event parameters (Figure A.37).
Figure A.37 Close Parameters
The default values for the Close Pulse are:
• 133.3 ms for 60 Hz
• 160 ms for 50 Hz
Figure A.38 shows how timing works for test initiation. The times, t
1
and
t
2
, indicate the following:
t
2
The time required to close the Main Contact.
The close time is measured from the test initiation.
t
1
The time required to close the resistor switch.
The close time is measured from the test initiation
(if the T0 option is selected in Resistor Switch
Timing Specification, see ”Resistor Switch
Timing – Close” on page A-77).
Figure A.38 Close Time
Time (ms)
0 10 20 30 40 50 60
t
2
t
1