1、MIL-P-45718 1i.l 9 7797906 0308717 1 - - 1.1 This SpecificaLon covers one t of electronic power enpply designated as Parer Supply PP-ll4LS R.eataient, MOiStnrW and Pringas- Resistant, of cammnieatiom, Electronic, and Associated Elee- trcal O,OOO feet. 3.6.7 Altitudeo - The power supply shaU operate
2、satisfactorily - and specifications referenced thereon. referenced thereon. f erenced thereon. electrical connections shall be mechanically secure and percent, 2 watt (2 recpired) Power supply; dc, output range zero to 150 volts, regulation to within 0,s percent for loads fran zero to Ai11 load and
3、lhe voltage changes from 105 to 19 volts ac, msJ ripple content, less than 10 mv, nus8 Power supply; ac, output adjustable fian zero to fio volts rms, 6 cps, E;oo watts, Electronic Voltmeter =-6B/a or equivalent. Standard Measuring Eqipment (see 6.3) 4 5 6 7 In inspecting the supplier?s inspection e
4、qydpnent, the Government inspector will. determine that the supplier has available, and utilizes comctu, gaging, measuring, and test equipnent of re-ed accuracy and precision and that the instruments are of proper type er) to cameotor 75902 pins 1 and 2. Conneet me it- 3 (resistor) between pins B an
5、d B e camector J5901, pncE the other minute warmup. period, aremss of oper- ating and nonoperating temperatures to which the power suppv Will be subjectedshall be as specified In 3.6.3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-,- 4.8.3.2 Vibrat
6、ion. - The power supply, nonoperating, shall be tested in accordance with the vibration test of Specification MIL-T-945, test 2, except that the total excursion shall be 0.0156 hch. conform to the requirements specified in 3.6.2, Upon ccanpletion of the vibration test, the power supply shall k.8.3.3
7、 - Shock. - The power supply, nonoperating, sbaU be tilted up through an angle of 30 degrees or 6 inches, whichever is less, using one edge of the power supply as an axis. The power supply shall be allowed to fall back freely to the horizontal position on a 2-inch-thick hardwood surface. The test sh
8、all be repeated, using other practicable edges of the same horizontal face as axes, for a total of 4 drops. The power suppiy shall conform to the requirements as specified in 3.6.3 following the series of shock tests. 4.8.3.4 Relative humidity. - The power supply shall be tested in accordance with t
9、he humidity test of Specification MIL-Eb5272, procedure III, except that the relative humidity shall be 90 percent. The power supply shall conform to the requirements of 3.6,4 upon conclusion of the humidity test. 4.8.3.5 Fungus resistance. - The power supply shall be tested in accordance with the f
10、unms test of Specification MIEE-5272, procedure I, except no evidence of fungs growth shall be present upon conclusion of the tests (see 3.6.5). 4.8.3.6 Salt-laden air. - The power supply shall be tested in accordance with the salt-spray test of Specuication MIL-E-5272, procedure I. The power supply
11、 shall conform to the requirements of 3.6.6 upon conclusion of the salt-spray test. 4.8.3.7 Altitude. - The power supply shall be tested in accordance with the temperature-altitude test of Specification MIEE-5272, procedure II. 3.6.7 and the unit shall be rionoperathg for the 50,OOO foot test. The t
12、emperature shall be within 5 degrees C of the extremes specified in 3.6.1, Upon conclusion of the altitude tests, the pmer supply shall operat e satisfactorily (see 3 .6.7) 0 The altitude shall be as specified 5n 4.9 Acceptance. - Power supplies which have met all rewe- ments of this specification s
13、hall be accepted* 4.10 Preservation, packaging, pa cking and markinq. - Inspection for the purpose of determbh g ccanpliance with the preservation, pack- aging, packing and marking of section 5 shall be conducted in accord- ance with Specification IL4-45703 . Provided by IHSNot for ResaleNo reproduc
14、tion or networking permitted without license from IHS-,-,-5.1 Preservation, packaging, p acking, and marking. - Preservation, packaging, packing, and marking for the required levels of protection, as specified (see 6.2), shall be in accordance with Specification EIIL-45703, F6321. 60 NOTES 6.1 Inten
15、ded use. - Power supply PP-Ll45/MFQ=25 is intended to provide regulated potentials of negative 70 volts dc and positive 70 volts dc for use in Radar Set AN/hR&25 (Cm Missile System) 6.2 Ordering data, - Procurement documents should specify the (a) !Citle, nuniber, and &te of this specificationr (b)
16、Whether a preproduction sample is required (see 3.1). (c) Number of preproduction samples reared (see 3.1). (d) Where the preproduction sample tests shall be performed (e) Sampling other than specified (see 4.3). (f) Selection of appicable levels of preservation, f ollowingt (see 4.2). packaging, an
17、d packing (ses 5.116 (g) Applicable stock numbers. 6.3 Definitions. 6.3.1 Standard measuring equipnent. - Stanard masuring eqyip- ment includes the common hand type measuring devices which are usual4 stocked by cannercia1 supply houses for ready supply (shelf items, and which are nonnally used by an
18、 inspector to perform electrical inspection of items under procurement. This category also includes camiaercial testing equipnent Notice: When Government drawings, specifications, or other data are used for any purpose other than .in cormec%ion with a definitely related Governent procurement operati
19、on,. the United States Goverment thereby incurs no respo&bility nor ny obli- gation whatsoever j and the fact th& the Government may have formulated, furnished, or in any way supplied the said drawings, * 1. - 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
20、m IHS-,-,-MIL-P-45718 14 7777906 0308726 2 I specifications, or other data is not to be regarded by impication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sel1 any patented nvention that may in any way be related thereto. Preparing Activity: Anq - Ordnanoe 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
