Introduction1 General 1.1 Scope 1.2 Classification of electronic equipment2 Normative references3 Definitions4 Normal service conditions 4.1 Altitude 4.2 Ambient temperature 4.3 Vibration and shock 4.4 Relative humidity 4.5 Special service conditions 4.6 Source of power 4.6.1 Supply from an accumulator battery 4.6.2 Supply from a transformer 4.6.3 Waveform of alternating voltage 4.6.4 Supply from a potentiometer device linked to the contact system 4.6.5 Supply by a rotating set or static convertor 4.6.6 Permitted transient surge voltage 4.7 Common conditions for test place 4.8 Installation 4.9 Protection against short circuits5 Categories of tests 5.1 Categories of tests 5.2 Type tests 5.3 Routine tests 5.4 Investigation tests6 Tests 6.1 Test items 6.2 Classification of temperature tests7 Test methods 7.1 Performance test 7.2 Insulation resistance test 7.3 Dielectric withstand voltage test 7.4 Surge test 7.5 Noise test 7.6 Temperature rise tests 7.7 Cooling test 7.8 Dry heat test 7.9 Damp, heat test 7.10 Cyclic change of temperature test 7.11 Vibration test 7.11.1 Determination of resonant frequencies 7.11.2 Test with sustained vibrations 7.12 Shock test 7.13 Watertightness test 7.14 Dust-proof test 7.15 Continuously passing current test 7.16 Test in corrosive atmosphere8 Tests and acceptance inspection on complete vehicle 8.1 Performance test 8.2 Protection against surges