TechNetters,
In GR-78-CORE, Issue 1, 1997, SIR Test Procedure 13.1.3.2 R13-6 [808], it states (capitalization mine) "The average insulation resistance (megohms), for EACH SAMPLE GROUP, taken at 24 hours and again at 4 days, shall be greater than the minimum specified in table 13-4.
In IPC J-STD-004B, 3.4.1.4.1 Reporting SIR Test Results, the first criteria for passing the SIR test is: "All SIR measurements on all test patterns shall exceed the 100 Mohm requirements."
My questions are as follows:
1) In the Telecordia document, what constitutes a "sample group"? One comb pattern? All the comb patterns on one coupon? All the coupons being used to test one material?
2) For the IPC method does the criteria apply to the readings at the end of the test? First and last? At every measurement? The document seems vague to me.
Bev
RIM
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