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Five specimens prepared as described in Clause 3.1 shall be visually examined and tested for
Sealing and Electrical Performance according to Clauses 3.2, 3.3 and 3.4. All the steps outlined
below shall be completed sequentially.
Thermal Shock
The test method shall be in accordance with IEC 68-2-14. The samples shall be subjected to rapid
temperature changes with exposure times at T
min
(minimum service temperature) and T
ex
(the
maximum excursion temperature) set as specified in Table 1. Fifty cycles shall be completed and
the samples subjected to sinusoidal vibration in accordance with Clause 3.8.2.
The test method shall be in accordance with IEC 68-2-6. The samples from Thermal Shock shall
be subjected to the following vibration regime:
10 - 25Hz at 1g acceleration
25 - 500Hz at 4.5g acceleration
in two orthogonal directions, reciprocating at 1 cycle/min. The test duration shall be
8 hours ± 15 minutes in each direction with the cable/connector unpowered. The first frequency
sweep should be conducted at 1 octave/min to identify resonances (which should be absent). If
resonances are found, these should be recorded and the test carried out at the maximum resonance.
At the conclusion of the test, the samples shall be subjected to the Petrol Immersion test as
described in Clause 3.8.3.
The samples from the Vibration test shall be immersed in Automotive Gasoline (4* Petrol) for a
period of 1 hour ± 5 minutes at 23 2 C. On removal the samples shall be allowed to dry for 24
± 2 hours at ambient. On completion of the test the samples shall be subjected to the
Temperature/Humidity Cycle as described in Clause 3.8.4.
Temperature/Humidity Cycle
The samples from the Petrol Immersion test shall be subjected to the following
temperature/humidity cycle:
The samples shall be conditioned in an atmosphere of 95% relative humidity at 40 ± 3°C for 16
hours ± 15 minutes. On removal the samples shall be immediately transferred (within 30 seconds)
to a cold chamber at -40 ± 3°C for 2 hours ± 15 minutes. On removal the samples shall be
immediately transferred (within 30 seconds) to an air circulating oven set at the appropriate T
max
(the maximum continuous operating temperature) as specified in the Table 1 for 2 hours ± 15
minutes. The cycle shall be completed by storing the samples at 23 ± 2°C for
4 hours ± 15 minutes. The samples shall be subjected to 10 complete cycles each of 24 hours
duration. At the conclusion of the test the samples shall be re-submitted for Visual Examination,
Sealing and Electrical Performance testing according to clause 3.2, 3.3 and 3.4 respectively.
