The keystrokes of cell phone jammer

Determine the number of wear-resistant specimen sample in one of the following conditions of rotation is the number of wear-resistant samples: a) sample 5 the average position of the measuring resistor is not greater than 1? time; b) when the shielding efficiency of not less than 40dB; c) grid-like damage to the surface appear larger than or equal to 6 cm 2; d) the area of individual holes is greater than or equal to 2 cm 2 pm. 6.1.7.6 The results a) to take three samples the number of wear-resistant cloth to wear as the arithmetic mean number of revolutions; wear rotation should not be less than 500 rpm; b) test data; It will better that there is no base station within a range of 200-300m around the place wherecell phone jammershielding system is needed to be installed. allow maximum relative error is less greater than the average of 40% maximum relative error is expressed as a percentage and calculated as follows: the maximum relative error = maximum (or minimum)? average mean × 100% when the results exceed the allowable relative error, the homes to the maximum error of the sample measurement, re-added sample test, until it meets the required date. 6.1.7.7 Test report The test report shall include the contents of the same 6.1.1.7. 6.1.8 breaking strength and elongation test 6.1.8.1 indicative of a major equipment or records added to the specimen until it stretched from the most vigorous and the corresponding elongation of the specimen constant elongation (CRE ) tester.cell phone jammer influence from architectural layout in the prison should also be considered.  Tester indicates the error or record breaking force should not exceed ± 1%, instructions or record clamp spacing error should not exceed ± 1mm. Two clip forceps instrument should be at the center of the axis of tension on the jaw line clip pliers and pull line should be vertical, gripping surface should be in the same plane. Clip pliers should be able to grip the specimen samples without slipping, clamp clip surface should be smooth, not cut or damage the specimen sample. If you can not prevent the sample clip pliers slip gripping surface at the appropriate cushioning material; can also use other forms of holder, held hostage by the width of not less than 60mm.The shielding position ofcell phone jammersystem in the prison should be designed.  6.1.8.2 Sample 6.1.8.2.1 Sampling 16 GB/T6568 -2008 sampling method with 6.1.1.2.1. 6.1.8.2.2 Sample preparation for precise clipping and trimming edges yarn, so that the sample width of 50mm, length 200mm.