1、t MIL-1-83449 (USAF) 10 December 1974 MILITARY SPECIFICATION INDICATOR SET, LIQUID OXYGEN QUANTITY, A/A24J-21 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 dicator set that is designated A/A24J-21. master indicator and .a repeater i
2、ndicator. This specification covers one type of 5-liter liquid oxygen quantity in- The indicator set consists of a 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids or requests for proposal, form a part of this specification to the extent spec
3、ified herein, SPECIFICATIONS Mi 1 it ary MIL-1-25645 MIL-L-27160 Indicator, Liquid Oxygen Quantity, Capacitance Type, General Specification for Lighting, Instrument, Integral, White, General Spec- if ication for STANDARDS Federal FED-STD-59 Eli 1 it ary )lors MI L-STD-78 1 Reliability Tests: Exponen
4、tial Distribution MIL-STD-831 Test Reports, Preparation of MS3 3 5 5 8 Numerals and Letters, Aircraft Instrument Dial, Standard Form of FSC 6680 THIS DOCUMENT CONTAINS 9 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-83449 (USAF) (Copie
5、s of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer . ) 3. REQUIREMENTS 3.1 General specification. Unless otherwise specified herein
6、, the re- quirements of section 3 of MIL-1-25645 shall apply as requirements for this specification. If the requirements of section 3 of MIL-1-25645 and the requirements of section 3 of this specification conflict, the requirements of this specification shall govern. 3.1.1 Qualification, The indicat
7、or sets furnished under this specifica- tion shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.1.2 and 6.3). 3.1.2 Components. and a repeater indicator. shall include all of the equipment (.except cables) necessary
8、to meet the performance requirements specified herein and in MIL-1-25645. The indicator set shall consist of a master indicator The master indicator and the repeater indicator 3.1.3 Capacitance. For design purposes, the capacitance for zero reading shall be 63.5 picofarads (PF), 3.1.4 General electr
9、ical requirements 3.1.4.1 Power-failure flag. The master indicator and the repeater indi- cator shall each have a power-failure flag. The flags shall be blank for power-on conditions and shall indicate “OFF“ for power-off conditions. 3.1.4.2 Integral lighting. The master indicator and the repeater i
10、ndi- cator shall each have integral lighting. The integral lighting shall con- form to MIL-L-27160. 3.1.4.3 Electrical connectors. The electrical connectors shall be in accordance with figures 1 and 2. indicator shall be designed internally so that they will function proper- ly when the mathg connec
11、tors are wired as shown in figures 1 and 2. The part numbers of the connectors that are specified in figures 1 and 2 are designations of the Amphenol Connector Division; 2801 South 25th Avenue; Broadview, Illinois 60153. The master indicator and the repeater 2 Provided by IHSNot for ResaleNo reprodu
12、ction or networking permitted without license from IHS-,-,-co- AX M 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-83449 (USAF) REPEATER INDICATOR CONNECTOR CONFORMING TO PART NO. 182-11, OR EQUAL (SEE 3. I. 4. 3 ) - -7 MASTER- PIN A NO CONN
13、ECTION MASTER- PIN D -0 5 VOLT, 400 HERTZ .E GROUND J MASTER- PIN L L MASTER-PIN M M MATING CONNECTOR CONFORMING TO PART NO, 165-10, OR EQUAL (SEE 3. I. 4. 3) -.- E J L M - - FIGUM 2. Repeater Indicator Connector Wiring 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
14、icense from IHS-,-,-MIL- 1-8 3449 (US AF) 3.1.5 Performance 3.1.5.1 Accuracy. When the indicator set is tested as specified in MIL-1-25645, the accuracy of the master indicator shall be in accor- dance with table I. The tolerance for the room-temperature reading is the allowable deviation from the n
15、ominal calculated values. The tolerance for the repeater indicator is the allowable deviation from the corresponding master indicator reading. are the allowable deviation from the room-temperature reading. Any other tolerances TABLE I. Tolerances for Capacitance Readings Performance Requirements Acc
16、uracy - room temperature Low temperature operation High temperature operation Vibration Power supply variation Low temperature storage and operation High temperature storage and operation Salt spray Cycling Repeat er Tolerance (Plus or Minus) 0.4 pF 0.5 pF 0.5 pF 0.3 pF 0.3 pF 0.5 pF 0.5 pF 0.3 pF 0
17、.3 pF 0.3 pF 3.1.5.2 Calibration adjustments. The zero calibration adjustment for both the master indicator and the repeater indicator shall be capable of adjusting the pointer to zero indication over an input capacitance range (to the master indicator) of at least 60.0 pF to 67.0 pF. With the indic
18、ator adjusted to zero indication at 60.0 pF input capacitance, the indicator shall be capable of calibration to full scale indication at 89.0 pF input capacitance by means of the full calibration adjuct- ment. With the indicator adjusted to zero indication at 67.0 pF input capacitance, the indicator
19、 shall be capable of calibration to full scale indication at 96.0 pF input capacitance by means of the full calibration adjustment. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-83449 (USAF) 3.1.5.3 Power supply variation. in MIL-1-25645, v
20、ariations of supply voltage from 105 volts to 125 volts and frequency of 320 to 480 hertz shall not cause indicator errors exceeding those specified in table I. be checked at frequencies of 320 and 480 hertz. the indicator shall be checked at frequencies of 320 and 480 hertz. When the indicator is t
21、ested as specified For the 105-volt test point, the indicator shall For the 125 volt test point, 3.1.6 Details of components 3.1.6.1 Cases. The case of the master indicator shall not exceed 5.0 inches in length. The case of the repezter indicator shall not exceed 3.5 inches in length. 3.1.6.2 Dials.
22、 er indicator shall conform to figure 3. dials shall conform to MS33558. The dial of the master indicator and the dial of the repeat- The numerals and the letters on the 3.1.7 Weight. pounds. The weight of the master indicator shall not exceed 1.5 The weight of the repeater indicator shall not excee
23、d 0.75 pound. 4. QUALITY ASSURANCE PROVISIONS 4.1 General specification. Unless otherwise specified herein, the quality assurance provisions for the indicator set shall be in accordance with sec- tion 4 of MIL-1-25645. In the event of conflict between the quality assur- ance provisions of MIL-1-2564
24、5 and the quality assurance provisions of this specification, the quality assurance provisions of this specification shall govern. 4.1.1 Classification of tests. following : The indicator set shall be subjected to the (a) Qualification tests (b) Quality conformance tests, 4.1.2 Qualification tests.
25、One indicator set chai1 be subjected to the . qualification tests which shall consist of all the examinations and tests described under “Test Methods“ of MIL-1-25645. 4.1.2.1 The indicator set that has been tested as specified in 4.1.2 and three copies of a qualification test Qualification sample an
26、d test report. report that has been prepared in accordance with MIL-STD-831 shall be sub- mitted to the qualifying activity (see 6.3). 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-83LILI7 66 7777706 OLLILI615 5 - MIL-1-83449 (USAF) Il - Il
27、 LIQUID OXYGEN I LITERS L u-.240 f0.015 LO. 175 20.015 MARKINGS ON DIAL NUMERALS GRADUATIONS MAJOR MINOR SUB MINOR LETTERS LIQUID OXYGEN LITERS OFF BACKGROUND DIAL OFF FLAG HEIGHT OR LENGTH I+O.OlO) O. 140 O. 188 0.125 0.080 . O. 140 0.100 O. 062 O. 094 WIDTH OF LINE OR GRADUATION (+O. 005) 0.025 O.
28、 031 O. 015 O. 015 0.020 O. 015 0.015 O. 015 FLAT S U R FAG E COLOR OF FINISH (SEE FED-STD-595) 37875 37875 37875 37875 37875 37875 37875 37875 37038 31158 DIMENSIONS IN INCHES FIGURE 3. Dial 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-$7 U. S. GOVERNMENT PRINTING OFFICE 1975 -603- 114/4022 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
