DLA MIL-DTL-7990 D-2012 TRANSMITTER TEMPERATURE ELECTRICAL RESISTANCE -70 TO +300篊.pdf
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1、Comments, suggestions, or questions on this document should be addressed to DLA Aviation VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616 or e-mailed to STDZNMGTdla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST d
2、atabase at https:/assist.dla.mil. AMSC N/A FSC 6685 INCH-POUND MIL-DTL-7990D 15 August 2012 SUPERSEDING MIL-DTL-7990C 20 September 2007 DETAIL SPECIFICATION TRANSMITTER, TEMPERATURE, ELECTRICAL RESISTANCE, -70 TO +300C This specification is approved for use by all departments and agencies of the Dep
3、artment of Defense. 1. SCOPE 1.1 Scope. This specification covers electrical resistance temperature transmitters used in aircraft in conjunction with electrical resistance temperature indicators. 1.2 Classification. The electrical resistance temperature transmitters are of the sizes specified in tab
4、le I (see 6.2). TABLE I. Size - stem length and overall length. Size PIN Stem length (inches) Overall length (inches) 1 MS28034-1 1.875 3.500 2 MS28034-2 4.000 5.625 3 MS28034-3 0.325 2.125 4 MS28034-4 1.875 2.506 1.3 Part or identifying number (PIN). The PIN to be used for electrical resistance tem
5、perature bulbs acquired to this specification is created in accordance with MS28034.Reactivated after 20 September 2007 and may be used for new and existing designs and acquisitions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-7990D 2 2.1
6、 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the compl
7、eteness of this list, document users are cautioned that they must meet all specified requirements of the documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications,
8、standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MS28034 - Bulbs, Temperature, Electrical Resistance (-70 C t
9、o +300 C). DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of U.S. Military Property. MIL-STD-810 - Environmental Engineering Considerations and Laboratory Tests. MIL-STD-1916 - DoD Preferred Methods for Acceptance of Product. MIL-STD-31000 -Technical Data Packages. DEPARTMENT O
10、F DEFENSE HANDBOOKS MIL-HDBK-831 - Preparation of Test Reports. (Copies of these documents are available at https:/assist.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other government documents, drawings, and publicatio
11、ns. The following other government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). STANDARDIZATION DOCUMENTS SD-6 - Provisions Gover
12、ning Qualification. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-7990D 3 (Copies of these documents are available at https:/assist.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 1
13、9111-5094.) 2.3 Non-government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). ASTM INTERNATIONAL ASTM B 117 - Standard Practice for
14、 Operating Salt Spray (Fog) Apparatus. (Copies of these documents are available at http:/www.astm.org/ or from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a con
15、flict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS
16、3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with MS28034. In the event of any conflict between the requirements of this specification and the specification sheet, the later shall govern. 3.2 Qualification. Transmitters furnished under thi
17、s specification shall be products that are authorized by the qualifying activity for listing on the applicable qualified products list before contract award (see 4.3 and 6.3). 3.3 Components. The transmitter shall consist of a resistance element, a transmitter housing, an electrical connector, and a
18、 gasket. 3.4 Materials. Metals shall be corrosion resistant unless protected to resist corrosion during normal service life. The use of dissimilar metals, especially brass, copper, or steel in intimate metal-to-metal contact with aluminum alloy, shall be avoided where practicable. 3.4.1 Recycled, re
19、covered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle co
20、sts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-7990D 4 3.4.2 Protective treatment. When materials are used in the construction of the transmitter that are subject to deterioration when exposed to climatic and environmental conditions li
21、kely to occur during service usage, they shall be protected against such deterioration in a manner that will in no way prevent compliance with the performance requirements of this specification. The use of any protective coating that will crack, chip, or scale with age or extremes of climate and env
22、ironmental conditions shall be avoided. 3.5 Design and construction. 3.5.1 Temperature range. The transmitter shall be designed to function satisfactorily throughout the temperature range of -70 C to 300 C. 3.5.2 Construction. The transmitter shall conform to MS28034. The transmitter shall be constr
23、ucted to withstand the normal strains of jars, vibrations, and other conditions incident to shipping, storage, installation, and service without failure. The stem of the transmitter shall be brazed (or otherwise attached, subject to the approval of the procuring activity) to the transmitter head to
24、prevent any leakage into the transmitter winding or electrical receptacle. 3.5.3 Resistance element. The resistance element of the transmitter shall be hermetically sealed in a metal well or stem. 3.5.4 Temperature resistance characteristics. The temperature resistance characteristics of the transmi
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