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-12934/35C 25 August 2009 SUPERSEDING MIL-PRF-12934/35B 1 February 1999 PERFORMANCE SPECIFICATION RESISTORS, VARIABLE, WIREWOUND, PRECISION, STYLE 2RR2104 This specification is approved for use b
3、y all 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 2RR2104, variable, wirewound, precision resis
4、tors. 1.2 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 2RR2104 F 2 A 8 L 203 Style (1.2.1) Function and shaft length (1.2.2) Class and center tap (1.2.3) Resistance t
5、emperature characteristic (1.2.4) Rotational life characteristic (1.2.5) Function conformity tolerance and resistance tolerance characteristic (1.2.6) Resistance (1.2.7) 1.2.1 Style. Style 2RR2104 is a similar style to RR2100. 1.2.2 Function and shaft length. The function and shaft length applicable
6、 to this specification is identified by a single symbol F (see figure 1). 1.2.3 Class and center tap. The class and center tap applicable to this specification is symbol 2. 1.2.4 Resistance temperature characteristic. The resistance temperature characteristic applicable to this specification is symb
7、ol A. 1.2.5 Rotational life characteristic. The rotational life characteristics applicable to this specification is symbol 8. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-12934/35C 2Inches mm Inches mm Inches mm Inches mm .0003 0.008 .062
8、1.57 1.000 25.40 2.000 50.80 .001 0.03 .093 2.36 1.188 30.18 2.031 51.59 .031 0.79 .2497 6.342 1.875 47.63 4.281 108.74 Style Turns Maximum continuous Working voltage (volts) Power rating (watts) 1/ Maximum starting and running torque Stop torque (pound- inch) First cup Second Cup Starting Running S
9、tarting Running 2RR2104 10 500 5.0 2.0 1.0 2.0 1.0 35 1/ When ten-turn units are ganged, all cups shall be 75% of rated wattage NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. FIGURE 1. Style 2RR2104 1.2.6 Function-conformity tolerance and resistance
10、 tolerance characteristics. The function-conformity tolerance and resistance tolerance characteristic applicable to this specification is symbol L. 1.2.7 Resistance. The nominal total resistance values and nominal resolution applicable to this specification is as follows: First cup 20 kilohms (k). S
11、econd cup 20 kilohms (k). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-12934/35C 32. 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 incl
12、ude 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 completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 an
13、d 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these doc
14、uments are those cited in the solicitation (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-12934 - Resistors, Variable, Wirewound, Precision, General Specification for. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Docume
15、nt Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.3 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 d
16、ocument, 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
17、shall meet the interface and physical dimensions specified in figure 1. 3.3 Mechanical travel. The mechanical travel shall be 3600 degrees +80 degrees, -0 degrees (+40 degrees at each end) for both cups. 3.4 Actual electrical travel. The theoretical electrical travel shall be 3600 degrees +1 degrees
18、, -0 degrees. 3.5 Function. The type of function applicable to this specification shall be independent linearity. 3.6 Pure tin. The use of pure tin, as an underplate or final finish is prohibited both internally and externally. Tin content of resistor components and solder shall not exceed 97 percen
19、t, 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 accordance with MIL-PRF-12934. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
20、 IHS-,-,-MIL-PRF-12934/35C 45. 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 responsib
21、le 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 managing
22、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 specifi
23、ed 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. If not otherwise specified (see 2.1), the versions of the individual docu
24、ments 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). 6.4 Tin whisker growth. The use of al
25、loys 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 manufacture and can develop under typical operating conditions, on products that use such materials. Conformal coatings applied
26、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 additional information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited Coatings of Tin). 6.5 Ch
27、anges 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 convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contrac
28、tors 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. Custodians: Preparing activity: Navy - EC DLA - CC (Project 5905-2009-038) NOTE: The activities listed above were intereste
29、d 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-,-,-
