95x Series Operating Manual - May 17, 2022
Page 17 of 155
• For AC or DC voltage test steps, the RETURN terminal of the 95x provides a protective ground to the DUT.
The user may wish to take precautions to ensure its connection to the DUT. If the CONTINUITY SENSE
setting in the CNFG - TEST menu is enabled, and the user connects a separate wire between the SENSE+
terminal of the 95x and the portion of the DUT to which the RETURN terminal wire is connected, then if
the RETURN terminal wire becomes disconnected from the DUT the test step will be immediately aborted
and the high voltage removed, preventing a potentially unsafe condition. See Test Sequence
Configuration.
• If option HSS-2 is not fitted then for AC or DC voltage test steps, if the voltage present on the HV terminal
is detected as being significantly different from that expected during the execution of a test step, then the
test sequence is immediately aborted and any high voltage removed, preventing a potentially unsafe
condition. This requires no specific configuration by the user.
• All processors in the 95x which participate in monitoring the output of the 95x and the condition of the
load check each other nominally every 5ms, if any mis-operation is detected which lasts more than 10ms
then the test sequence is immediately aborted and any high voltage removed, preventing a potentially
unsafe condition. This requires no specific configuration by the user.
• The main processor utilizes a hardware “watchdog” which recovers a malfunctioning system within
typically 100msec. If this occurs during a test then the test sequence is immediately aborted and any high
voltage removed, preventing a potentially unsafe condition. This requires no specific configuration by the
user.
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