MIL-R-193090
4.2 Sampling.
4.2.1 Preproduction. A preproduction sample of five relays, manufactured in accordance with 3.3.3, shall be subjected to the preproduction tests detailed in 4.4 at an activity designated by the acquiring activity. Acceptance of the preproduction sample shall be based on no defects in the sample. Further production of the relays by the supplier, prior to the approval of the preproduction sample, shall be at the supplier's risk.
4.2.2 Lot size. Unless otherwise specified in the contract or order, each shipment of units of product shall be a separate "inspection lot" and may differ from the quantity specified in the total order or contract. In any event, all units of a single "inspection lot" shall be made to the same design, with the same materials and manufacturing techniques, and shall be part of one continuous production run.
4.2.3 Periodic production samples. From each succeeding lot or grand lot of 300 or less that have passed the conformance inspection of 4.3, a random sample of five relays will be selected for submission to an activity designated by the acquiring activity to determine compliance of the samples with the requirements of the contract, specification, and drawings. The relays shall be considered satisfactory if they meet all specification and pertinent drawings requirements and withstand the tests specified in 4.3 and 4.4. Failure of the periodic production sample to comply with these requirements will result in the rejection of the lot, as determined by the acquiring activity.
4.3 Conformance inspection. Each relay delivered under contract shall be subjected to the following tests and examinations. Failure to meet any requirement specified herein shall be considered cause for rejection.
4.3.1 Test conditions. Unless otherwise specified, the relay shall be subjected to conformance tests under the following conditions.
4.3.1.1 Temperature. Room ambient 65°F to 95°F (18°C to 35°C).
4.3.1.2 Altitude. Normal ground.
4.3.1.3 Vibration. None.
4.3.1.4 Humidity. Room ambient to 95 percent relative maximum.
4.3.2 Test and inspection equipment and facilities. The manufacturer shall furnish and maintain all necessary test equipment and facilities and shall provide personnel for performing all conformance tests. The test equipment shall be adequate in quantity and, unless definite requirements are specified, shall be of sufficient accuracy and quality to permit the performance of the required test.
4.3.3 Items of test equipment. The following items of test equipment are required to perform the conformance tests set forth in this specification.
4.3.3.1 Source. A source of 700 volts rms, 60 Hz, ac power.
4.3.3.2 Megohmmeter. A 500 V dc megohmmeter, with a midscale reading of not less than 100 megohms (or a megohm bridge).
4.3.3.3 Kelvin bridge. A Kelvin bridge, or equivalent, having a nominal 35-volt source of dc power, a resistance rated at 1.5 watts and variable from 5,000 to 35,000 ohms, a 1.5 ohm resistance rated at 70 watts, and a voltmeter, scale 0 to 50 volts, accurate to within ± 1.0 percent.
4.3.3.4 Oscillograph. An oscillograph of a make satisfactory to the Naval Surface Warfare Center or its appointed agent. An interrupter (or signal generator) capable of 6 Hz, with an output of 6 volts. A dc milliameter, scale 0 to 10 mA, accurate to within ± 1 percent. Three dc ammeters, scale 0 to 5 amperes, accurate to within ± 1 percent.
10
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business