1、AMSC N/A FSC 6645 INCH-POUND MIL-DTL-3971/2E 18 March 2008 SUPERSEDING MIL-DTL-3971/2D 24 January 2001 DETAIL SPECIFICATION SHEET METERS, TIME TOTALIZING, NON-HERMETICALLY SEALED, ELECTRICAL: TYPE II, 120V, 60 Hz AND 120V, 400 Hz GRADES A AND B, 2 HOLE AND 3 HOLE FLANGE This specification is approve
2、d for use by all Departments and Agencies of the Department of Defense. The complete requirements for procuring meters described herein shall consist of this document and the issue in effect of MIL-DTL-3971. FIGURE 1. Meter with 3 hole flange. CLA MAX120B-BOLTCIRCLE RAD(BASIC)BOLT HOLES CCLE MAXD MA
3、XSurface Marking (see 3.6 of MIL-DTL-3971)Include part number (specificationsheet with dash numbers).Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3971/2E 2 FIGURE 2. Meter with 2 hole flange. EDFGBABOLT HOLES CProvided by IHSNot for Resale
4、No reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3971/2E 3 TABLE I. Specification data for type II meters. DASH NO. FIG A B C D E F G Grade Hz Range Readout 1 1 2.695 1.220 .125 2.210 3.00 A 60 100,000 99999.92 1 3.500 1.580 .150 2.625 3.00 A 60 100,000 99999.93 1 2.875 1
5、265 .150 2.210 3.00 A 400 10,000 9999.94 1 3.500 1.580 .150 2.625 3.00 A 400 10,000 9999.95 1 2.695 1.220 .125 2.210 3.00 B 60 100,000 99999.96 1 3.500 1.580 .150 2.625 3.00 B 60 100,000 99999.97 1 2.875 1.265 .150 2.210 3.00 B 400 10,000 9999.98 1 3.500 1.580 .150 2.625 3.00 B 400 10,000 9999.99 2
6、 2.120 1.750 .045 .936 1.950 1.020 1.450 A 60 100,000 99999.910 2 2.120 1.750 .045 .936 1.950 1.020 1.450 B 60 100,000 99999.9Notes: 1. Dimensions are in inches (in.). 2. Tolerances: Dimensional 0.015 in., bolt holes .005 in. unless otherwise indicated. Angular 0.5. 3. Range and readout are in hours
7、 and tenths of hours. 1. REQUIREMENTS 1.1 Dimensions of case. See figures 1 and 2 and table I as applicable. 1.2 Colors, elapsed time indicator: Hours: White on black background Tenths: Black on white background 1.3 Dielectric strength. Voltage Dash numbers 1,2,5,6,9 wire lead (blade) or terminal bl
8、ock (stud). 2.0 Changes from previous revision. The following changes were made to this document: a. “CPS” changed to “Hz” at 2 places in title. b. power consumption requirement was removed, had been “Not applicable”. c. Para. 1.5 statement on “rated voltage and frequency” and the start time require
9、ment added. d. Para. 1.7 tolerance data revised. e. Para. 1.8 paragraph title changed from “Part number”. Added blade/stud designation to PIN. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3971/2E 5 Custodians: Preparing activity: Army AR D
10、LA-GS1 Navy SH Air Force 99 (Project 6645-2008-003) Reviewers: Army AT, CR Navy AS, SA, MC, EC Air Force 11 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 data base at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
