1、Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center, Columbus, ATTN: DSCC VAT, Post Office Box 3990, Columbus, Ohio 43218-3990 or by email Resistordla.mil. Since contact information can change, you may want to verify the currency of this address informa
2、tion using the ASSIST Online database at http:/assist.daps.dla.mil/. AMSC N/A FSC 5905 INCH-POUND MIL-PRF-12934/9D 25 August 2009 SUPERSEDING MIL-R-12934/9C 1 February 1999 PERFORMANCE SPECIFICATION RESISTORS, VARIABLE, WIREWOUND, PRECISION, STYLE RR2100 This specification is approved for use by all
3、 Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-12934 1. SCOPE 1.1 Scope. This specification covers the requirements for style RR2100, variable, wirewound, precision resistors. 1
4、.2 Part or Identifying Number (PIN). Variable resistors covered by this specification must be identified by a PIN which must be in the following form. Single-section (cup) resistors RR2100 A 2 A 7 J 103 Style Function and shaft length (1.2.1) Class and center tap (1.2.2) Resistance temperature chara
5、cteristic (1.2.3) Rotational life characteristic (1.2.4) Function conformity tolerance and resistance tolerance characteristic (1.2.5) Resistance (1.2.6) 1.2.1 Function and shaft length. The function and shaft length applicable to this specification is identified by a single symbol in accordance wit
6、h table I. TABLE I. Function and shaft length. Symbol Shaft length tolerance 0.03125 (.79) 1/ Function A 0.375 (9.53) Linear B 0.500 (12.70) Linear C 0.625 (15.88) Linear D 0.750 (19.05) Linear E 0.875 (22.23) Linear F 1.000 (25.40) Linear 1/ Metric equivalents are in parentheses. Provided by IHSNot
7、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-12934/9D 21.2.2 Class and center tap. The class and center tap applicable to this specification are symbols 2, 3, 4, and 5. 1.2.3 Resistance temperature characteristic. The resistance temperature characteristic a
8、pplicable to this specification are symbols A to H, inclusive. 1.2.4 Rotational life characteristic. The rotational life characteristics applicable to this specification are symbols 7, 8, and 9. This potentiometer is capable of operations up to 100 rpm. 1.2.5 Function-conformity tolerance and resist
9、ance tolerance characteristics. The function-conformity tolerance and resistance tolerance characteristic applicable to this specification are symbols G to L, inclusive and S to X, Inclusive. 1.2.6 Resistance. The nominal total resistance values and nominal resolution applicable to this specificatio
10、n is in accordance with table II. TABLE II. Nominal total resistance and nominal resolution characteristics Nominal total resistance value Nominal resolution Ohms Percent 200 0.041500 0.035 1,000 0.0302,000 0.022 5,000 0.01610,000 0.013 20,000 0.01050,000 0.009 0.10 megohms 0.007 0.20 megohms 0.006
11、0.25 megohms 0.005 2. APPLICABLE DOCUMENTS 2.1 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
12、every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements 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 ha
13、ndbooks. The following specifications, 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 (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-12934 - Resistors, Variabl
14、e, Wirewound, Precision, General Specification for. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). Provided by IHSNot for ResaleNo reproduction o
15、r networking permitted without license from IHS-,-,-MIL-PRF-12934/9D 32.3 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,
16、 however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 General. The requirements for acquiring the product described herein shall consist of this document and MIL-PRF-12934. 3.2 Interface and physical dimensions. The resistors shall me
17、et the interface and physical dimensions specified in figure 1. Inches mm Inches mm Inches mm Inches mm Inches mm .006 0.02 .010 0.25 .073 1.85 1.375 34.91 2.031 51.59 .001 0.03 .031 0.79 .093 2.36 1.875 47.63 2.025 57.13 .005 0.13 .062 1.57 .250 6.35 2.000 50.80 Style Turns L (max) K (max) Maximum
18、continuousworking voltage (volts) Power rating (watts) 1/ Maximum starting and running torque (ounce-inch) Stop-torque (pound-inch) Ten-turn single cup Per each additional ten-turn cup Starting Running Starting Running RR2100 Ten 2.250 (57.13) 2.000 (50.80) 500 5.0 2.0 1.0 2.0 1.0 37.5 1/ When ten t
19、urn units are ganged, all cups will be 75 percent of rated wattage. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. FIGURE 1. Style RR2100 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-12934
20、/9D 43.3 Minimum total resistance. The minimum total resistance value shall be 200 ohms. 3.4 Maximum total resistance. The maximum total resistance value shall be 0.25 megohms. 3.5 Mechanical travel. The mechanical travel shall be 3600 degrees +10 degrees, -0 degrees. 3.6 Actual electrical travel. T
21、he theoretical electrical travel shall be 3600 degrees +4 degrees, -0 degrees. 3.7 Ganged cups. There shall be no more than 2 cups ganged. 3.8 Phasing. For independent linearity the phasing between the cups shall be within 1 degree. This shall be measured, with respect to the first cup, starting fro
22、m the counterclockwise end point. 3.9 Function. The type of function applicable to this specification shall be independent linearity. 3.10 Weight. The maximum weight shall be 0.5 pounds and each additional cup shall be 0.34 pounds. 3.11 Pure tin. The use of pure tin, as an underplate or final finish
23、 is prohibited both internally and externally. Tin content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.4). 4. VERIFICATIONS. 4.1 Sampling and inspection. Sampling and inspection procedures shall be in a
24、ccordance with MIL-PRF-12934. 5. PACKAGING. 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to contact the respons
25、ible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available from the managin
26、g Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information of general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The intended use speci
27、fied in MIL-PRF-12934 will be applicable to this specification. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of this specification, and the complete PIN (see 1.2). b. Unless otherwise specified (see 2.1), the versions of the individual do
28、cuments referenced will be those in effect on the date of release of the solicitation.). c. Packaging instructions (see 5.1). 6.3 PIN. This specification requires a PIN that describes technology and appropriate references to associated documents (see 1.2 and 3.1). Provided by IHSNot for ResaleNo rep
29、roduction or networking permitted without license from IHS-,-,-MIL-PRF-12934/9D 56.4 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit tin whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to years after manufactur
30、e and can develop under typical operating conditions, on products that use such materials. Conformal coatings applied over top of a whisker-prone surface will not prevent the formation of tin whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit the growth of tin whiskers. For additiona
31、l information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.5 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenienc
32、e only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custo
33、dians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 Review activities (Project 5905-2009-022) Army - AR, AT, AV, CR4, MI Navy - AS, CG, MC, OS Air Force - 19, 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
