Transcription of IPC-TM-650 Originating Task Group TEST METHODS …
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IPC-TM-650 Originating Task Group TEST METHODS …
1 ScopeThis method is to determine the physical endur-ance of printed boards to sudden changes of temperature. Itis designed to expose specimens to a series of high and lowtemperature excursions to cause physical Applicable DocumentsIPC-2221 Generic Standard on Printed Board Design3 Test SpecimenCoupon D from IPC-2221 or other suit-able test coupon (see ).4 automatically controlled dual temperature environ-mental test chamber or other dual chamber apparatuscapable of maintaining 65, 55, 40 or 0 C+0 5 C[ 85, 67, 40, +32 F+0 9 F]inthelowtemperature chamberand 70, 85, 105, 125, 150 or 170 +5 0 C [158, 185, 221,257, 302 or 338 +9 0 F] in the high temperature :The temperature extremes (high and low) that arerequired is dependent on the base material of the specimenthat is to be tested (see and the temperatures listed inTable 2).
6 Notes 6.1 The following details are to be specified in the applicable performance specification: a. Test specimen, if other than specified in 3. b. Test condition, if other than specified in 4.1. c. Maximum allowable change in resistance.
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