1、MIL-M-85522A Lb 9399906 Oq83785 5 E 17 June 1991 SUPERSEDING 5 August 1983 MIL-M-85522(AS) MILITARY SPECIFICATION MONITOR, OXYGEN, CRU-91/A This specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the
2、 Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the oxygen monitor which, as part of the on-board oxygen generation system (OBOGS) , monitors the delivered breathing gas mixture and provides a warning signal when oxygen concentration falls below prescribed levels. The oxygen mo
3、nitor uses a replaceable polarographic sensor to detect oxygen partial pressure. 2, APPLICABLE DOCUMENTS 2.1. Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this specification to the extent specified herein.
4、 Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the sol ici tation (see 6.2b). SPECIFICATIONS FED ERAL PPP-6-601 - Boxes, Wood, Cleated-Plywood. PPP-6
5、-621 - Boxes, Wood, Nailed and Lock Corner. PPP-B-636 - Boxes, Shipping, Fiberboard PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: System
6、s Engineering and Standardization Department (Code 53, Naval Air Engineering Center, Lakehurst, NJ 08733-5100, by using the Standardization Document Improvement Proposal (DD Form 1426) appear-ing at the end of this document or by letter. AMSC-NA FSC 1660 DISTRIBUTION STATEMENT A. Approved for public
7、 release, distribution is unlimited, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-M-85522A Lb 9999906 048L7b 7 I MIL-M-85522A(AS) SPEC1 FICATIONS (con t i nued) MILITARY MIL-P-116 DOD-D- 1000 MIL-E-5400 MI L-0-272 1 O MI L-G-276 17 STANDARDS
8、MILITARY DOD-STD-100 MI L-STD- 1 05 MIL-STD-129 MI L-STD- 1 30 MIL-STD-210 MIL-STD-454 MI L-STD-461 MIL-STD-462 MIL-STD-704 MIL-STD-810 MI L-STD-970 MI L-STD-1359 MI L-STD- 1 52 3 MIL-STD-2073-1 Preservation, Methods of. Drawings , Eng1 neeri ng and Associated Li sts . Electronic Equipment, Aerospac
9、e, General Specification for. Oxygen, Aviators Breathing, Liquid and Gas. Grease, Aircraft and Instrument, Fuel and Oxidizer Resistant. Engineering Drawing Practices. Sampling Procedures and Tables for Inspection by Attributes. Marking for Shipment and Storage. Identification Marking of U. S. Milita
10、ry Property. Climatic Information To Determine Design and Test Requirements for Military Systems and Equipment. Standard General Requirements for Electronic Equipment. Electromagnetic Emission and Suscepti bi 1 i ty Requirements for Control of Electromagnetic Interference. Electromagnetic Interferen
11、ce Characteri stics, Measurement of. Aircraft Electric Power Characteristics. Environmental Test Methods and Engineering Guidelines. Standards and Specifications, Order of Precedence for the selection of. Cleaning Methods and Procedures for Breathing Oxygen Equipment. Age Controls of Age-Sensitive E
12、lastomeric Material (for Aerospace Applications). DOD Materiel Procedures for Development and Application of Packaging Requirements (Part 1 of 2 Parts). Equipment (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardizati
13、on Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.). 2.1,2 Other Government documents, drawi ngs, and pub1 i cations. The followins other Government documents, drawings, and publications form a part of this specification to the extent specified herein. specified,
14、the issues are those cited in the soliciation. Unless otherwise 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I IIL-M-85522A 1b 999990b 0481787 9 i. i DRANI NGS NAVAL AIR SYSTEMS COMMAND 1439AS1 O1 - (Copies of the above specif available from the
15、 contracting contracting activity.) cat act Moni tor, Oxygen. ons, drawings, and pub1 vi ty or may be obtained cations are as directed by the 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for related associated deta
16、i.1 specifications, specification sheets or MS standards), the text of this document shall take precedence. however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS shall be products which are authorized by the qualifying activity for listing
17、 on the applicable qualified products list at the time of award of contract (see 4.3.and 6.4). oxygen monitors on the applicable qualified products list shall be dependent on periodic verif.ication of continued compliance with the requirments of this ii I Nothing in this document, 3.1 Qualification.
18、 The oxygen monitors furnished under this specification In addition, the retention of the qualification for the specification (see 4.3 and 4.3.2). subjected to first article inspection (see 6.5) in accordance with 4.4. 3.2 First article. When specified, an oxygen monitor sample shall be 3.3 Selectio
19、n of specifications and standards. Specifications and standards for necessary commodities and services not specified herein or in the applicable detai 1 specifications shall be selected in accordance with MI L-STD-970. 3.4 Material s. Materials shall conform to referenced specifications and shall be
20、 as specified herein and on referenced drawings. Materials which are not covered by specifications, or which are not-specifically described herein,. shall be of the best quality, of the lightest practicable weight and suitable for the purpose intended. 3.4.1 Metal parts. All metal parts shall be of
21、a corrosion resistant material or treated in a manner to render them adequately resistant to corros i on. 3.4.1.1 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals shall not be used in intimate contact with each other. shall apply. 3.4.2 Nonmetallic mater
22、ials. Any nonmetallic material that is adversely affected by continued use with oxygen shall not be used. 3.4.2.1 Age. Elastomer components shall be controlled in accordance with MIL-STD-1523 (see 6.3). The requirements of MIL-STD-454, Requirement 16 for Class 2 equipment 3 Provided by IHSNot for Re
23、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-85522A Lb m 9999906 0483788 O m 3.4.2.2 Ozone resistance. Elastomer components shall be composed of an ozone resi stant composition which shall not bloom. 3.4.2.3 Fungus-proof materials, All materials used in the monitor
24、construction shall be incaoable of. supportinq fungoid growth, as defined in MIL-STD-810. 3.4.2.4 Operatinq life. The oxygen monitor shall have a minimum operating life of 8,000 hours with minimal servicing and replacement of parts. requiring scheduled replacement shall be approved for use by the ac
25、quisition activity. 3.4.2.5 Storage life. The oxygen monitor shall be designed to meet the performance and service life requirements of this specification after 5 years storage under worldwide climatic conditions specified in MIL-STD-210, when packaged in accordance with MIL-STD-2073-1 , and MIL-P-1
26、16, Method IIb. Parts 3.4.2.6 Protective treatment. Nhen materials are used in the construction of the oxygen monitor that are subject to deterioration when exposed to environmental conditions likely to-occur during service usage, they shall be protected against such deterioration in a manner that w
27、ill in no way prevent compliance with- the performance requirements of this specification. Protective coating which might crack, chip or scale during normal service life or under extremes of environmental conditions shall not be used. 3.5 Desiqn and construction. The design and construction of the o
28、xygen The oxygen monitor shall. conform to MIL-STD-454, Requirement 9, monitor shall be in accordance with MIL-E-5400 and envelope Drawing 1439AS101. for workman s h i p . flow-rates and pressures specified in 3.6.1.1 and withstanding a static inlet pressure of 75 psig without damage; 3.5.1 Gas supp
29、ly. The oxygen monitor shall be capable of operating at the shall be capable of 3.5.2 Electrical power. The oxygen monitor shall operate from a DC power source, in accordance with MIL-STD-704, with a voltage range for operation of 18.0 to 31.5 volts DC. operation, shall be not greater than 56 watts
30、at 28 VDC. Maximum power, without heater/accessories operation, shall be not greater than 7 watts at 28 VDC. Total power consumption including heater/accessories 3.5.3 Electronic modules and solid state design. 3.5.3.1 Modules. The electronic portions of the oxygen monitor shall be functionally modu
31、larized. o rr c 0 3.5.3.2 Solid-state design. No electron tubes shall be utilized in the design of the oxygen monitor. in accordance with MIL-STD-454, Requirement 30. controlling the absolute pressure in the sensor cavity of 211.6 * 4 mm Hg (31,400 * 400 feet al titude) at altitudes above 31 ,800 fe
32、et. Semi-conductor transistors and diodes shall be 3.5.4 Altitude compensation. The oxygen monitor shall be capable of 3.5.5 Calibration. If manual calibration is required, the oxygen monitor shall contain a calibration adjustment that is easily accessible without disassemb1.y. 4 ! e Provided by IHS
33、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-“-. i NIL-N-85522A Ib 9999906 U481789 2 3.5.6 Output signal. 3.5.6.1 Analog signal. The oxygen monitor shall provide an analog signal voltage output which is directly proportional to the oxygen partial pressure of the
34、 sample gas. 3.5.6.2 Warning signal. The monitor shall activate a warning signal with a sample gas at an oxygen partial pressure of 182 +3/-12 mm Hg. within the normal temperature range of 40F and 150“F, 182 +3/-17 mm Hg within the high temperature range of 150F and 160“F, and 182 1.13 mm Hg within
35、the low temperature range of -65F and 40F. the warning “on“ level and the warning “off“ level (that is, the point at which the warning light is activated “on“ with decreasing oxygen partial pressure and “off“ with increasing oxygen partial pressure) shall be equivalent to no more than a 20 mm Hg par
36、tial pressure differential in oxygen concentrat i on. 3.5.6.3 Warninq signal “on/off“ range. The hysteresis exhibited between 3.5.7 Press-to-test. The oxygen monitor shall contain a press-to-test 3.5.8 Leakage. With 5 psig applied to the oxygen monitor and all venting feature capable of operating as
37、 specified in 3.6.1.2. ports sealed, outward leakage shall be not greater than 0.010 lpm (NTP). 3.5.9 Fluid plumbinq and electrical interface. The sample gas plumbing port nd the electrical connector shall be as defined and located in Drawing 1439AS101. 3.5.10 Weight. The total veight of theoxygen m
38、onitor shall be not greater than 1.75 pounds. 3.5.11 Interchanqeabi 1 i ty. The oxygen monitor shall meet the inter- changeability requirements of MIL-E-5400, which includes MIL-STD-454, Requirement 7. In addition, all parts, subassemblies and assemblies having the same part number shall be identica
39、l in accordance with DOD-STD-480 and DOD-STD-100. performance 1 imi ts with cal i bration adjustments only. identified in accordance with MIL-STD-130. When any part is interchanged, the oxygen monitor shall meet all 3.5.12 identification of product. The oxygen monitors shall be 3.5.13 Serial numbers
40、. The oxygen monitors shall be identi.fied by individual serial numbers which shall be assigned by the manufacturer. Serialization shall be by a block of consecutive numbers to cover the entire acquisition quantity. 3.5.14 Clean1 iness. 3.5.14.1 Degreasinq. Prior to assembling the oxygen monitor and
41、 its subassemblies, all internal surfaces shall be degreased in accordance with MIL-STD-1359. After completion of the cleaning and when assembled, a Halide testing apparatus having a sensitivity of at least 3 x standard cclsec, shall be used to determine the absence of the cleaning compound. When ot
42、her than a ha1 ide containing compound is used to degrease, appropriate procedures shall be emjlojed to assure complete cleaning compound removal. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-N-85522A Lb m 9999906 04L790 9 m 3.5.14.2 Lubrica
43、nts. Lubricants qualified to MIL-G-27617 may be used sparingly on ,seals and straight threads if assembly difficulty is encountered. 3.6 Performance. 3.6.1 Operational; 3.6.1.1 Sample gas flow rate. The gas consumption of the oxygen monitor, when tested as specified in 4.8.2.1, shall be not greater
44、than 0.20 lpm (NTP) with 4 psig input pressure and 2.0 Liters per minute (lpm) (NTP) with 72 psig input pressure. 3.6.1.2 Press-to-test. The oxygen monitor, when tested as specified in 4.8.2.2, shall activate the warning light at the oxygen partial pressure specified in 3.6.5.2 within 25 seconds in
45、both the normal temperature range of 40F to 150F and the high temperature range of 150F to 160F; and within 60 seconds in the low temperature range of -65F to 4OOF. The warning signal shall be deactivated after release of the press-to-test plunger within 15 seconds in both the normal range of 40F to
46、 150F and the high temperature range of 150F to 160F; and within 20 seconds in the low temperature range of -65F to 40F. 3.6.1.3 Altitude. The oxygen monitor, when tested as specified in 4.8.2.3, shall activate the warning light at an oxygen partial pressure of 182 +3/-12 mm Hg. 3.6.2 Voltage variat
47、ion. The oxygen monitor, when tested as specified in 4.8.3, shall activate the warning signal at an oxygen partial pressure of 182 t3/-12 mm Hg. shall not exceed 3.5 amperes. Total current draw, to include warning and heater activation, 3.6.3 E 1 e c t romagn e t i c i n t e r f ere n ce / e 1 e c t
48、 romagne t i c compa t i b i 1 i ty . The oxygen monitor, when tested as specified in 4.8.4, shall show no evidence of functional, electrical or material failure during or after emission and susceptibility testing, and shall be not greater than the limits specified for Class Al equipment, Category A
49、lb. 3.6.4 High temperature. The oxygen monitor, when tested as specified in 4.8.5, shall show no evidence of functional, electrical or material failure and the warning circuit shall be activated at the oxygen partial pressure specified in 3.5.6,2. 3.6.5 Low temperature. 3.6.5.1 Operational. The oxygen monitor, when tested as specified in 4.8.6.1, shall show no evidence of functional, electrical or material failure. The warning signal shall be activated at the oxyg
