1、MIL-I-27820A 58 W 77777Ob 0154LLb Lt 9 . Septehiber i965 Superseding . 1. scorn b. Typo P: Control-.- 19re followna docmnts form Q grt; of thio specification to alC Gha3.l apply. ThC Caeari#C Bouse Ibr Femctor 6ballJoccomplish such chm Power Supply Set Major and Minor Type II Type II OA-4109 (, ) /M
2、CCa12 b. Power Supply Set Ma j or and Minor OA-6445/FCC 11. Demodulator Group -Major and Minor Type II Telephone Carrier OA-4111 ( )/MCC-12 (MIL-D-27811) 12, Fuse Panels Major and Minor Type I and Type II (See (MIL-M-27741) 3.6.1.3 Output.-The indicators shall provide the following outputs: a. Pilot
3、 lamp power-The indicators shall provide power to light Ehe major, minor and cutoff alarm lamps, and operate the major alarm relays on all panels specified in Table I except items (i), (2) , and (3) Major external alat;i.-The indicators shall provide control to actuate an b. external alarm indicatin
4、g a major alarm with the system. (See 3.6*1.2) C. Minor external.alarm.-The indicators shall provide control to actuate an external alarm indicating a minor alarm within the system. (See 3.6.1.2) 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL
5、-I-27820A 58 799790b 0154125 5 3.6.1.4 functions for all controls located on the front panel of the indicators. Front panel controls.-The following Table II lists the names and control .TABLE II CONTROLS AND INDICATORS Item No. Des r iv t ion Position Function 1 liaz Ac oSmrnetcr shall read infinite
6、 ohms. 4.6,3.3.3 Minor alarm test. as Piace botk WY C7;.;.?F switches in ?OWL and connect the ohmmeter b. C. between terminals 3 I and 3, O tem.i22l bsard Al. Strap terminiil 11 2, temiuaf $5 oz zzrminzt board AI. shall read zero ohx and MZNOX A.GJ3 kmp shall light. Unstrap terminals 11 and 15 otl t
7、euri:ina; bear Al. shall extinguish atid the ohmmeter stiall red infinite ohns. The ohmneter The MINOR ALARM 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-27820A 58 W 777770b 0154131 O MIL-I-27820A (USAF) .4.6.3.3.4 Alarm cutoff test.-Turn
8、 the ALARM CUTOFF switches to CUTOFF individually and together. The ALARM CUTOFF lamp shall light when either or both URN CUTOFF switches are in CUTOFF and shall not light when both ALARM CUTOFF switches are in NOLHAL. 4.6.3.3.5 Alarm test switch test. I a. Press MAJOR ALAM TEST switch. The WOK ALAR
9、31 lamp shall light. b, Press MINOR ALARM TEST switch. The MINOR ALARI lamp shall light. 4.6.4 conditions specified in MIL-M-27743. Environmental tests.-The indicators snall be sriiijected to tke erJvirorisnta1 4.6.5 Class Gp of MIL-STD-826. te,sting will stop, fixes applied an retest mirde until eq
10、uipment meets the requirements. RF interference test.-The indicators shall be tested ia accordance with When out of specification readings are noted, formal 4.6.6 be demonstrated in accordance with Appendix A cf EIL-M-26512 to L confidence level of 90 percent. 4.6.7 the test method presented in MIL-
11、R-264?4. fcient time to permit a decsfon to acccsr or reject the equipzimc in accorcawe with Tabla 1 of MIL-R-26474. 4.6.8 Production reliability testlng.-A production reliability test shall be performed on a quantity of production equipmnts io accordance with MIL-R-26474. Maintainability demonstrat
12、ion.-The maintainability of the indicatcrs c5sll The reliabilihy of the equipment sheJ.1 be etionstrated i:- accordance vith The res-. ehsXI be performed for sub- 5. Preparation for delivery. 5.1 =rocuring activSty. . Preparation for delivery shail be in accordence with the iastructior of the 5. NOT
13、ES 6.1 indicate a minor or major alarm condirion indicate minor and major alarm ccndiians, Intended use.-The Indicztor Power Sup;ly ID-1977 ( ),“MRC-38 is irb.tenEe. :c thk fixe:-office. The Cmtroi Indicator C-3668 ( )/MCC-12 is frrter.ied fo 282 fr. -ci. - c; :* r-r ,?!zc -1 1 =;i 16 Provided by IH
14、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_. MIL-I-27820A 58 W 7797906 OL5Li132 2 .IIL-I-27820A (USAF) a. Title, gwber, and dato of %his spucification. b. Applicable level of prusozvntion, packaging and Peking re- quired. (See 5.1) c. b!ieLhcr the tosting wi
15、ll h= conduc“2 other thm tx specified oc th2 contractor. (See 4.1) hcrefn. (Sec 3.8) d. f. Whether a reliabilty analyifi trill be subnitted by th contract- OF (see 3.3.8,(c) and tiai of sub?zfsion. 13. Whether a revised reliability wlysls wtll be submitted by the contractor (Gee 3,3.8ec(i) eni,vhea it, shall be oubtted. . . h. t;lhcther o. reliability -port WiU. be submitted by the conkractor (see 3.3.8,c(2) and trhen it shall be suldtted, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
