MIL-R-19365E
(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or https://assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094).
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 the documents cited in the solicitation or contract (see 6.2).
INTERNATIONAL ORGANIZATION for STANDARDS (ISO)
ISO 10012-1 - Equipment, Quality Assurance Requirements for Measuring - Part 1: Meteorological Confirmation System for Measuring Equipment.
(Copies of this document are available online at https://www.iso.org/ or should be addressed to the American
National Standards Institute, 11 West 42nd Street New York, NY 10036.)
NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL)
NCSL Z540-1 - Laboratories, Calibration, and Measuring and Test Equipment.
(Copies of this document are available from https://www.ncsli.org/ or from the National Conference of Standards
Laboratories (NCSL) International, 1800 30th Street, Suite 305, Boulder, CO 80301-1026.)
2.4 Order of precedence. In the event of a conflict 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
3.1 Requirements for individual resistor types. Requirements or exceptions applicable to individual types of resistors shall be as specified on figures 2 to 9, inclusive (see 6.2).
3.2 Qualification. Resistors furnished under this specification shall be products that are authorized by the qualifying activity for listing on the Qualified Products List (QPL) before contract award (see 4.4 and 6.3).
3.3 Materials. Materials shall be used which will enable the resistors to meet the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product.
3.4 Interface and physical dimension requirements. Resistors shall meet the interface and physical dimensions specified herein. Resistors shall consist of tubes wound with a single layer of resistance wire and protected by a coating or an enclosure of insulating, moisture resistant material. The design of the resistors shall be such as to preclude shorting of turns and to obtain a minimum voltage drop between adjacent turns.
3.4.1 Protective coating or enclosure. The resistance element of resistors shall be protected by a coating or an enclosure which shall completely cover the exterior of the resistance element, except for a uniform exposed portion,
90° nominal from the fixed terminals, along one side of the body. The protective coating shall be free from holes, fissures, chips, and other faults.
3.4.2 Windings.
3.4.2.1 Wire. The wire shall have no joints, welds, or bonds, except at end terminals. The conductor and insulation (if employed) shall be free as practicable from particles of impurities, grain growth, or other factors contributing to spot weakness. The term wire will be throughout this specification to describe the resistance element.
3.4.2.2 Pitch. For round wire, the average winding pitch shall not exceed 300 percent of the wire diameter.
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