95x Series Operating Manual - May 17, 2022
Page
89
of
155
•
ARC DETECT
. Allows the user to program arc detection during this step. Both the time and current level
can be independently programmed. ARC detection can also be disabled by setting the leftmost (time)
setting to OFF.
o
The 95x can be configured to not fail a test step when arcing is detected. This is configured by
the ARC setting in the CNFG
–
TEST sub-menu.
•
ON FAIL
. This allows the user to program the 95x to abort the entire sequence (ABORT SEQ) or only this
step (CONT SEQ) if this step fails any of its checks. A safety related failure or a user abort (
STOP
button)
always aborts the entire sequence.
CONNECTING TO THE DUT
The 95x measures the current flowing into the
RETURN
terminal to the 95x ground during these tests.
The
RETURN
terminal of the 95x provides a safety ground to the DUT during these types.
NOTE
–
since the 95x does not control the source of power to the DUT, there is no automatic shutdown if an
excessive current flows. The 95x contains a low voltage (<30V) MOV type protection device from the
RETURN
terminal to its chassis ground if excessive current flows, but the user should take additional measures to protect
the system from high current flows in the event of a DUT failure.
The example above shows a typical DUT ground leakage connection between the DUT and the 95x. The DUT line
and neutral connections would normally be connected to a line and neutral line power source. The 95x is used to
check that the DUT does not have excessive ground leakage using the ACI type test step.
For this type of testing, it is often also required to test the ground leakage of several exposed portions of the DUT
as well as the ground connection of the DUT. In those cases, the same connection to the 95x would be used, but
the connection to the DUT would be to each required test point on the DUT.
This type of testing is often used for testing that the patient connections of a medical device meet ground leakage
safety standards. In these cases, the DUT would be connected normally, either with or without its power ground
connection as required by the standard, and each patient connection would be tested for ground leakage by
connecting it to the 95x RETURN terminal.
LEAD COMPENSATION
Lead Compensation is not usually performed on these types. If needed, then Lead Compensation can be used to
reduce the effects of external leakage current.
When performing lead compensation, the ground leakage current limits are not enforced, otherwise the test step
is executed normally.
RETURN
95x
DUT
L
N
