JOTP-053
11 March 2015
(1) Monitor the test points detailed in the test plan.
(2) Remove one of the UUT's electrical I/O connections allowing it to float prior to
applying power.
(3) Power up and allow the UUT to perform its functional mission.
(4) Repeat steps 2 through 3 for each remaining I/O with the exception of power.
(5) Allow the UUT to begin its functional mission.
(6) Remove one of the UUT's electrical I/O connections allowing it to float. This
floating condition shall occur before the enabling of any safety features (as shown on the UUT
event timeline within the test plan).
(7) Repeat steps 5 through 6 for each remaining I/O with the exception of power
(removing the ground I/O should be tested).
(8) Allow the UUT to begin its functional mission.
(9) Remove one of the UUT's electrical I/O connections allowing it to float. This
floating condition shall occur after the enabling of the first safety feature (as shown on the UUT
event timeline within the test plan).
(10) Repeat steps 8 through 9 for each remaining I/O with the exception of power.
(11) Repeat steps 1 through 10 for the remaining UUTs.
b. Test Rationale. The objective of this test is to verify that the electronics will not respond
in an unsafe manner if the I/O pins are floating including grounds. A floating pin analysis shall be
conducted for each pin in the connectors of the device under test. This analysis shall address
floating pins occurring both, prior to, and after, application of power(s), and at various stages in
the arming cycle. Testing shall be conducted for any case which cannot be determined via analysis
to verify that no safety system failures, faults, or anomalies occur.
5.1.7 Test Procedure - Transient Loss of Ground.
a.
Perform the steps below:
(1) Monitor the test points detailed in the test plan.
(2) Allow the UUT to begin its functional mission.
(3) Apply 3 consecutive cycles of a 50 ms loss of ground condition at 50% duty cycle
to one of the ground sources. If the program has a specified requirement for susceptibility to a
ground drop-out, that time shall be used in lieu of 50 ms. This drop-out of ground shall occur
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