1、Y MIL-R-28827 (I) 58 = 7997906 0155056 b W II i Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Command (ELEX-8111), Washington, DC 20363, by using the self-addressed Standardization Document Im
2、provement Proposal (DD Form 1426) appearing at the end of this document, or by letter. Commander, Naval Electronic Systems II .I F-6I-S MIL-R-Z8819(EC) AMENDMENT 1 3 January 1983 RADIO NAVIGATION RECEIVING SET, OMEGA, ANIBRN-7, AN/SRN-17 . This amendment forms a part of Military Specification MIL-R-
3、Z8819(EC), dated 19 May 1975, and is approved for use by the Naval Electronic Systems Command, Department of the Navy and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 2.1, “SPECIFICATIONS“, “MILITARY“, after “MIL-S-901, Add: “MIL-C-915/6 Cable, Electrical
4、 600 Volts, Types SHOF, DHOF, THOF, And FHOF“. 2.1, “SPECIFICATIONS“, “MILITARY“, after “MIL-E-17555“, Add: “MIL-T-28820 Radio Navigation Receiving Set, Omega, ANIBRN-7, AN/SRN-7“. 2.1: “STANDARDS“, “MILITARY“: Delete “MIL-STD-167 Mechanical Vibrations of Shipboard Equip- ment“ and substitute MIL-S
5、TD-167-1 Mechanical Vibrations of Shipboard Equipment (Type I - Environ- mental and Type II - Internally Excite)“. 2.1, “STANDARDS“, “MILITARY“, after MIL-STD-167-1“, Add: “MIL-STD-454 I - Standard General Requirements For Electronic Equipment“. 2.1 “STANDARDS“, “MILITARY“: Delete “MIL-STD-480 Confi
6、guration Control-Engineering Changes, Deviations and Waivers. 2.1 “STANDARDS“, “MILITARY“: “MIL-STD-781: Delete “Reliability Tests Exponential Distribu- tion“ and substitute “Reliability Design Qualification And Production Acceptance Tests: Distribution“. Exponential 2.1 “STANDARDS“, “MILITARY“, aft
7、er “MIL-STD-781: Delete “MIL-STD-1399 - Interface Standard For Shipboard Systems“ and substitute “MIL-STD-1399, Section 702 - Interface Standard For Ship- board Systems Synchro Data Transmission“. PAGE 3 3.3.3: Delete. 3.4: Delete the text and substitute: “The equipment shall have an upper test mean
8、time- between-failure (MTBF) (O,) and a lower test MTBF (O,) of 2000 hours and 1000 hours, res- pectively. (Upper test MTFB (O,) and lower test MTBF (O,) are as defined in MIL-STD-781.)“. 3.6.3, line 3: Delete “Class IA and substitute “Class A5“. 3.6.5, first sentence: Delete “MIL-STD-167“ and subs
9、titute “MIL-STD-167-1. FSC 5825 o- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-28819 (1) 58 9999906 0355057 B MIL-R-28819( EC) AMENDMENT 1 PAGE 4 3.7.1, line 6: Deiete “will be FHOF-3.“ and substitute “shall be Type FHOF-3 in accordance wit
10、h MIL-C-915/6 .If PAGE 5 3.7.2.2, line 8: Delete: “35A-7“ and substitute “3SA-7“. 3.8.l(a), line 5: After “TS-3389“ Add “in accordance with MIL-T-28820ii. PAGE 7 3.8.2, line 1: After “ar“ add !specified“. PAGE 9 3.10.1.2(g) line 1: Delete ii6.2.3“ and substitute “6.3.3“; line 3: Delete “6.2.4“ and s
11、ub- st it Ute “6.3.4“. PAGE 12 After “3.10.8“, add the following new paragraphs: “3.11 Computer resources. Navy standard computer resources shall be used to implement system requirements; If this is not feasible, justification (including technical analysis, life-cycle cost comparison and potential s
12、chedule impact) shall be provided to the procuring activity prior to the use of any other computer resources. This includes computers, micro- computers, microprocessors, displays, peripherals, interfaces, and software. peres (mA). “3.12 Leakage current. “3.13 Workmanship. The leakage current of the
13、equipment shall not exceed 5 milliam- “3.13.1 General workmanship. Workmanship shall conform to Requirement 9 of MIL-STD-454. Soldering shall conform to Requirement 5 of MIL-STD-454. 3.13.2 Workmanship screen. All equipments shall withstand a defect detection vibration screen of random type vibratio
14、n at 0.04g2/Hz I3 dB from 80 Hz to 350 Hz and temperature cycling as specified in 4.6.11.2.“ PAGE 13 4.4.1, line 7: After last sentence: Add: “The general inspections shall be the first inspections conducted, and sha in TABLE IV.“ TABLE IV: Add the following new entries: “General workmanship 3.13.1
15、Workmanship screen Vibration 3.13.2 Temperature cycling 3.13.2 PAGE 14 TABLE V: TABLE VI, after “Inclination“, Add: “Leakage current 3.12“. Delete “Heat test“ and entry in its entirety. mrkmanship and workmanship screen 1 be performed n the order indicated i 2 of 6 Provided by IHSNot for ResaleNo re
16、production or networking permitted without license from IHS-,-,-MIL-R-288L7 (I) 58 7997706 015.5058 T = MIL-R-28819( EC) AMENDMENT 1 PAGE 15 4.5 through 4.5.2: Delete and substitute: “4.5 Reliability testing. 4.5.1 Reliability qualification testing. Reliability qualification testing shall be per- Th
17、is testing shall be accomplished in accordance formed on at least two production equipments. with MIL-STD-781, using Test Plan IIIC and Category 3A test conditions. The equipments shall be operated on a continuous operating cycle during the test. tion of those subjected to reliability qualification
18、testing, shall be subjected to a production reliability acceptance test, in accordance with the Accept-reject criteria figure of MIL-STD-781. The test duration for each equipment shall be 50 hours. During the test, the equipment shall be operated continuously in an ambient temperature of 40 Celsius
19、C) i5C. occurs during the test, the equipment shall be repaired and another 50-hour test run to verify repair.“ 4.5.2 Production reliability acceptance testing. Every production equipment, with the excep- If a failure (see 6.3.6) PAGE 17 After “4.6.8“. Add the following new paragraphs andFIGURES: “
20、4.6.9 Leakage current. Leakage current shall be measured at the steady-state power line voltage and frequency, 115 volts (V), 60 Hz and 400 Hz. equipment of the first months production. Thereafter, leakage current shall be measured on one equipment per 100 successive equipments produced, Leakage cur
21、rent shall be measured on one WARN I NG THIS TEST MAY BE HAZARDOUS DUE TO THE UNGROUNDED CONDITION OF THE EQUIPMENT DURING THE TEST. SHOCK PROTECTION!. DO NOT TOUCH EXPOSED METAL SURFACES WITHOUT ADEQUATE ELECTRIC THE UNITED STATES GOVERNMENT NEITHER ASSUMES NOR ACCEPTS RESPONSIBILITY FOR ANY INJURY
22、 OR DAMAGE THAT MAY OCCUR DURING OR AS A RESULT OF THIS TEST. 4.6.9.1 to an external power source and units deriving power from the equipment shall be placed on an insulated surface. All safety ground conductors between the equipment and units deriving power from the equipment shall be intact. The s
23、afety ground conductor between the equipment and the source power shall be opened during the test. OBSERVE WARNING STATEMENT. The equipment shall be connected as shown in FIGURE 3 if it is connected to single phase source power. ting configuration. Equipment controls in each operating mode shall be
24、such that maximum power will be utilized during leakage current measurements. The leakage current shall be determined by the voltage-drop method. A true rms voltmeter shall be used. The voltage measured across the 1500-ohm resistor, when equal to 7.5 V, represents 5 mA of leakage current. The overal
25、l measure- ment error shall not exceed five percent. The probe shall be used on all external conducting parts such as case, connector housing, recessed calibration or adjustment controls, and control shafts with knobs removed. The voltage shall be measured from each part to ground for every combinat
26、ion of switch positions available in FIGURE 3. The open safety ground conductor shall be reconnected imdiately after the test is completed.“ Equipment test connections. After power removal, each equipment directly connected 4.6.9.2 Measurement. Leakage current shall be measured on the equipment in i
27、ts normal opera- 3 of 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-28837 (1) 58 W 7779706 0355059 L U CI t W L 3 ul 5 E m c t W L L 3 U W Y aJ L O rc E m L m m m ? .r -0 CI ln aJ CI aJ v1 A= I W CTi t m n 7 g MI L-R-288 19 (EC) AMENDMENT 1
28、 i= w LL u v) U LL I 4 of 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-28819 (1) 58 999970b 0355060 8 MIL-R-28819(EC) AMENDMENT 1 “4.6.10 General workmanship. The equipment, including subassemblies and assemblies, shall be examined for wor
29、kmanship and soldering during the fabrication and assembly process and at the end item level, for conformance to the requirement of 3.13.1. performed on each equipment. level. All the hardware, including cables and connectors, shall be exposed to vibration. Vibration. approval, pseudo-random or comp
30、lex waveform vibration, for an accumulated time of 10 minutes in the axis deemed most susceptible to vibration excitation. All items shall be hard-mounted (with- out shock isolators) and subjected to the vibration conditions of FIGURE 4. The control accelero- meter shall be located next to one of th
31、e mounting points of the item under vibration. Spectral analysis equipment having a bandwidth no greater than 10 Hz for vibration frequencies up to 500 Hz and 100 Hz for vibration frequencies above 500 Hz shall be used for the control and analysis of the acceleration spectral density (ASD). The item
32、 shall be energized during vibration and appropriate input signals applied to observe any abnormal conditions of the output functional characteristics. All failures occurring during screening shall be corrected and the vibration resumed. 4.6.11 Workmanship screen. Prior to conducting temperature cyc
33、ling, vibration shall be fhe vibration may be performed at the module, drawer, or end item 4.6.11.1 The vibration shall be random, or subject to procuring activity 20 80 350 2000 FIIEOUENCV Iiiil FIGURE 4. Random vibration curve. 4.6.11.2 Temperature cycling. Each equipment shall be subjected to 10
34、cycles of the tem- perature curve shown in FIGURE 5. The temperature rate of change shall be not less than 5C per minute. shall be positioned for maximum exposure to the changing temperature. Where performance measure- ments are called for, a minimal functional operating test shall be performed. sha
35、ll be maintained until the largest electrical or electronic part in the equipment reaches 80 percent of the chamber temperature. cycling continued for a cumulative total of 10 cycles. The equipment power shall be turned on and off at the indicated times. The equipment The dwell time When failures oc
36、cur, the equipment shall be reworked and the 5 of 6 o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-X 2 xx MIL-R-28819( EC) AMENDMENT 1 FIGURE 5. One cycle of temperature curve (not to scale).“ Preparing activity: (Project 5825-NO1 5( EC) ) NAVY - EC * U.S. GOVERNMENT PRINTING OFFICE: 183-605-034/1Z3S 6 of 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
