Objective: to grasp the power adapter inspection standard, make the incoming quality better conform to our company's quality requirements.Applicable scope: is suitable for our factory use the power adapter.Testing instruments and equipment: multimeter, withstand voltage tester, insulation resistance tester, ac millivoltmeter or oscilloscope, power meter, electronic load, frequency conversion power supply, vernier caliper, plug gauge.The inspection items and technical requirements
Appearance:Shell has no deformation, scratch, crack, burr, shrink and smear phenomenon.No oxidation, mildew spot, stain of the metal, AC, DC plug pins equally without loose.Line body burns, wounds, broken, smudgy, conductor without leakage.Nameplate content should be correct, nameplate stick (or post, post wrong, slanting, leakage phenomenon such as camber.Surface cracks, pan is not greater than 1 mm, cooperate with good, can not have loose phenomenon.Engraving content right nameplate label or plastic shell, writing clear, no typos word.Shell line and silk screen clear, no typos word.Structure size:Each structure size shall conform to the requirements of the technical specification of raw materials or samples,AC and DC plug pins equally: should conform to the requirements of the technical specification of raw materials or samples.
Boot check:The adapter internal components must be consistent with the sample,Components on the tin and no empty welding, welding.No short circuit, open circuit PCB board, copper case become warped.Coil wound without oxidation, loose, camber, etc. Bad phenomenon.Silicon steel sheet without oxidation, loose, as well as the cock.The adapter should be no foreign body.Electrical properties: (see table)High-pressure test: after test, the following should be no leakage, fox, breakdown.Primary to secondary: AC3000V, 60 s, 5 ma:Junior to shell: AC3000V, 60 s, 5 ma:Insulation resistance: primary to secondary 500 VDC, insulation resistance should be greater than 100 mq.
DC transfer lines: DC head without oxidation, join order without the disorder.Ageing: after aging test, the surface temperature cannot exceed 65 ℃, noodles, pan without deformation, burning phenomenon. Each performance index in the range of specifications.Drop test: after drop test, the shell without break, plug no loose, fall off phenomenon, the normal electrical performance.Flame retardant: shell after flame retardant test, material can be flame retardant.Test method: appearance: visual observation. The structure size, measured with vernier caliper and plug gauge.Boot check: visual method of a foreign body (measured with vernier caliper).Electrical properties: connection, variable frequency power supply and electronic load with power meter to measure the input parameters: using ac millivoltmeter ripple (or an oscilloscope) test, with wanOutput voltage and current is measured with a table.Withstand voltage tester is used in high pressure test: test.Insulation resistance: with insulation resistance tester tests.DC transmission line: use a special test or multimeter measurement.Aging: with rated load current aging at room temperature for 12 hours.Drop test: adapter from 1 m high free fall board to the ground three times in various directionsFlame retardant test: should comply with UL94 V 0 fire protection standard. The samples vertical sample to two 10 seconds after the combustion test,The flame shall be extinguished within 30 seconds, and no combustibles shall fall.