A-A-54576
Records. Records of examinations and tests performed by or for the
contractor shall be maintained by the contractor and made available to the
Government upon the Government’s request, at any time, or from time to time,
during the performance of the contract and for a period of three years after
delivery of the supplies to which such records relate.
Inspection. Inspection, as used herein, is defined as both examination (such as visual or auditory investigation without the use of special laboratory appliances or procedures) and testing (determination by technical means of physical and chemical properties) of the item.
Sampling for examination. Sampling for examination shall be conducted in accordance with MIL-STD-105, with an AQL of 1.0 (percent defective) and an inspection level of II. The unit of product for examination purposes shall be one audiometer.
Sampling for tests. Sampling for tests including dimensional test, shall be conducted in accordance with MIL-STD-105, with an AQL of 1.0 (percent defective) and inspection level of S-2. The unit of product for test purposes shall be one audiometer.
Tests. Tests shall be conducted to determine compliance with specification requirements. Where feasible, the same sample shall be used for the determination of two or more test characteristics.
a. Verify the unit operates on each specified voltage and frequency. All remaining tests are to be performed using each specified input power.
b. Verify installation by two patch cords only, one earphone cord and one subject response cord.
c. Verify frequency sequence, in automatic mode, of 1000, 2000, 3000, 4000, 6000, 1000, 500 Hz,
d. Verify actual frequencies generated are within one percent of indicated frequencies.
e. Verify amplitude linearity is within 1dB for every 10dB increment, with maximum accumulated error of 2dB or less relative to calibration level.
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