Appearance of the power supply adapter of cell phone jammer

Switching-on inspection: visual inspection (the foreign material should be tested by the caliper if there is).
Electrical performance: connect variable frequency power supply and electronic load and measure the input parameter with the wattmeter; test the ripple wave with the AC millivoltmeter (or oscilloscope) and test the output voltage and current with the multimeter.
High voltage test of adapter of cell phone jammer: test with the dielectric strength tester.
Insulated impedance: test with the insulated resistance tester.
DC transmission line: test with the specific testing jig or multimeter.
Aging: energize and age with the rated loading in the room temperature for 12 hours.
Drop test: the adapter freely falls from directions to the floor at 1m high for three times.
Inspection instrument and equipment: universal meter, dielectric strength tester, insulated resistance tester, AC millivoltmeter (or oscilloscope), wattmeter, electric load, variable frequency power supply, caliper, plug gauge and so on.
Inspection items and technical requirements
Appearance of the power supply adapter of cell phone jammer:
The shell has no crack, burr, deformation, scratch, shrinkage and stain.
The metalwork has no oxidization, fungus, stain and the AC pin and DC plug have no looseness.
The whisker has no burning, scoring, damaging and staining and the core wire has no exposure.