ARMY MIL-I-14868-1970 INDICATOR DIGITAL DISPLAY 10559241《10559241 数字显示指示器》.pdf

1、MILITARY SPECIFICATION INDICATOR, DIGITAL, DISPLAY: 10559241 1 Megohm) k 1.2 , 4.6. 3 103. Indicator illumination 3. 3. 1.3 4. 6.4 switch 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-1LIb 12 7777906 LIbLI77b 2 MIL -I- 148 68 (MU) 4. 3, 3 A

2、cceptance and rejection. - Rejected lots shall be screened for all defective characteristics. Removal or correction of defective units and resubmittance of rejected lots shall be in accordance with IlAcceptance and Rejection“ as specified in MIL-STD-105. 4.4 Special sampling, 4.4. 1 General. - One i

3、ndicator shall be selected at random by a Government representative as a control sample from each 100 pro- duced. The control sample shall meet the requirements and tests in Table VI. TABLE VI CONTROL TEST REQUIREMENT TEST PROCEDURE 301. Fabrication 3.1 Applicable drawings - 302, General Specificati

4、on 3.2 MIL-F-13926 - Visual Visual 4,4. 2 Environmental, - Three indicators shall be selected at random by a Government representative as a control sample from each 50 produced or from each months production, whichever occurs first. Table VIL The control samples shall meet the requirements and tests

5、 in TABLE VI1 CONTROL TEST REQUIREMENT TEST PROCEDURE 303. Storage temperature 3. 3. 2. 1 4. 6. 5. 1 3 04. Operating temperature 3. 3. 2. 2 4. 6. 5. 1 3 05. Vibration 3.3, 2. 3 4. 6. 5. 2 306, Shock 3. 3.2.4 4. 6. 53 307, Immersion 3. 3.2 5 . 4. 6, 5.4 4.4. 3 Failure of sample. - Should any one item

6、 of a special sampling fail to meet the specified test requirements, acceptance of the product shall be suspended by the Government until necessary corrections have been made by, the contractor and the resubmitted item has been approved (see 4, 3. 3). 4,5 Inspection equipment, - Except as otherwise

7、provided for by the contract, the contractor shall supply and maintain inspection equipment in accordance with the. applicable requirements of MIL-I- 45607, a c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL -I - 148 68 ( MU) 4,5, 1 Government f

8、urnished inspection equipment. - Where the contract provides for Government furnished test equipment, and maintenance of test equipment shall be in accordance with the applicable requirements specified in MIL-1-45607, supply 4. 5, 2 Contractor furnished inspection equipment. - 4. 5. 2. 1 Government

9、design. - Unless otherwise specified in the contract, all inspection equipment specified by drawing number in specifications or SQAP forming-a part of the contract shall be supplied by the contractor in accordance with applicable technical data listed in the technical data package (TDP), 4, 5. 2. 2

10、Contractor design, - The contractor shall design and supply inspection equipment compatible with the “Test Methods and Procedures specified in 4, 6 of this specification and with the compon- ent inspection procedures specified in “Examination“ and “Te st Facili- ties“ requirements of MIL-F-13926. Si

11、nce tolerance of test equipment is normally considered to be within 100Joof the product tolerance for which it is intended, this inherent error in the test equipment design must be considered as part of the prescribed product tolerance limit. Thus, concept, construction, materials, dimensions, and t

12、olerances used in the design of test equipment shall be so selected and controlled as to insure that the test equipment will reliably indicate acceptability of a product which does not exceed 90%of the prescribed tolerance limit and permit positive rejection when nonconforming, Construction shall be

13、 such as to facilitate routine calibration of test equipment. 4, 5. 3 Test equipment. - In conjunction with 4, 5. 2, the standard test equipment listed in Table VI11 shall be utilized in performing the applicable test of 4. 6. TABLE VI11 NOMENCLATURE DESCRIPTION 1. D-C Power Supply Plus 5 *o, 2 v Ri

14、pple: 25 mV p-p max Ripple: 25 mV p-p max Ripple: 100 mV p-p max 4, Ohmmeter Range: O to 10 megohm Accuracy: rest Facilities“ require - ments of MIL-F-13926, Test methods and procedures. P 4. 6. 2 Readout selection logic, - Apply the digital type-A sig- nal to Table I3ed, in turn, to the group of te

15、rminals associated with each nixie tube specified in Table II and ob- serve the readout number on the nixie tube, numbers shall be as specified in 3. 3. 1. 1, The nixie tube readout 4. 6. 3 Laser mode control switch, - Measure for an open or short circuit condition between the terminals specified in

16、 Table IiI for the listed switch positions. shall be present between these terminals as specified in 3. 3. 1. 2. An open or shGrt circuit condition 4, 6. 4 indicator illumination. - Apply the digital type-B signal of Table I to the pins of J1 as specified in Table IV, Observe the in- dicator lamp as

17、sociated witheach of the listed pins of J1. cator lamps shall light as specified in 3. 3. 1. 3, The indi- 4. 6. 5 Environmental tests, - The test equipment shall be in accordance with the “Test Facilities“ requirements of MIL-F-13926, except that the inhator may be mounted-on the inside surface of t

18、he- test chamber for the temperature test and the tolerance requirements for vibration frequency measuring instruments shall not apply. 4, 6. 5. 1 Temperature test. - NOTE: T&e rate of temperature change shall be less than 7 F per minute during temperature cycling. (a) Place the indicator in the tes

19、t chamber and reduce the (b) Soak the indicator at this temperature for at least 5 hours (c) Raise the chamber temperature to -4O:F. (d) Following thermal stabilization at -40 F, place the indi- cator in operation and perform the tests specified in 4, 6. 2, 4, 6. 3, and 4, 6.1.4, (e) RaiSe the chamb

20、er tempesature to t160F. (f) Soak the indicator at ti60 F for at least 5 hours with (g) Reduce the chamber temperature to t12S0F, chamber temperature to -80OF. with the unit not operating. the assembly not operating, 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without lic

21、ense from IHS-,-,-c (h) Following thermal stabilization at +125OF, place the indicator in operation and perform the tests specified in 4. 6, 2, 4. 6. 3 and 4. 6. 4. (i) Reduce the chamber temperature to ambient. (j) Following stabilization at ambient temperature, place the indicator in operation and

22、 perform the tests specified in4.6.2, 4.6.3, and4.6.4. The indicator shall meet the requirements of 3. 3, 2. 1 and 3. 3, 2. 2. 4. 6. 5. 2 Vibration. - With the indicator firmly mounted to the vibration table, perform the following: (a) Test in accordance with Method 514-1 of MIL-STD-810 for category

23、 (f) equipment, except that the acceleration shall not exceed 14g and the maximum excursion (double amplitude) shall be O. 5 inch. 5 Hz in a period of 15 minutes. in each of the three mutually perpendicular axes. examination for damage or loose parts. specified in 4, 6. 2, 4. 6. 3, and 4. 6, 4. (b)

24、Sweep the frequency from 5 Hz to 500 Hz and back to Perform two sweeps (c) Following vibration cycling, perform a visual-tactile (d) Place the indicator in operation and perform the tests The indicator shall meet the requirements of 3. 3. 2. 3. - 4. 6. 5. 3 Shock. - With the indicator rigidly mounte

25、d to the shock machine table, perform the following: (a) Test in accordance with Method 516, Procedure IV, of MIL-STD-810, except that the indicator shall be sub- jected to one shock in each direction of the three mutual- ly perpendicular axes and the shock impulse shall be a sawtooth or half-sine w

26、ave with a duration of 6 milli- seconds and a peak amplitude of 1OOg. ation for damage and loose parts. specified in 4. 6. 2, 4. 6. 3 and 4. 6. 4. (b) After exposure to shock, perform a visual-tactile examin- (c) Place the indicator in operation and perform the tests The indicator shall meet the req

27、uirements of 3. 3. 2.4. 4. 6. 5, 4 immersion, - Connect the leak test port of the indicator to a cylinder of nitrogen or air and pressurize it to 5 I1 psig. the indicator in water at 110 IIOF to a depth not to exceed 2 feet and observe the indicator for evidence of leakage (gas bubbles) for a period

28、 Submerge 11 _. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-I-14b 12 7797706 04b400 O n 9 MIL -I - 14868(MU) of 15 minutes. immersion. ) The indicator shall meet the leakage requirements of 3. 3. 2. 5. (Note: The indicator shall not be left

29、 unattended during 5. PREPARATION FOR DELIVERY .5.1 Packaging, packing and marking, - Packaging, packing . and marking shall be in accordance with Packaging Data Sheet 10559241. The level of protection shall be as specified in the procurement docu- ment. 6. NOTES 6. 1 Intended use. - The indicator i

30、s a functional unit of the Laser Range Finder AN/VVS-1. The indicator contains a laser mode control switch, indicator lights which indicate the system operational condition, and readout devices (nixie tubes) which display range re- turns, selected target range, and malfunctions. 6. 2 Ordering data.

31、- Procurement documents should specify the following: -. (a) Title, number, and date of this specification. (b) Applicable packaging data sheet number (see 5, 1) (c) (d) Applicable stock number. (ci) Requirement for First Article Submission. Selection of applicable levels of preservation, packaging and packing, Custodian: Preparing activity Army - MU Army - MU Project No. 1240-Al37 U. S. GOVERNMENT PRINTING OFFICE( IWO-393-096/5-5317 12 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-