1、AMSC N/A FSC 6645 INCH-POUND MIL-DTL-3971/1F 18 March 2008 SUPERSEDING MIL-DTL-3971/1E 24 January 2001 DETAIL SPECIFICATION SHEET METERS, TIME TOTALIZING, NON-HERMETICALLY SEALED, ELECTRICAL: TYPE 1, 10-40V OR 40-130V OR 10-130V: 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 requirement 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 MAX
3、Surface 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-3971/1F 2 FIGURE 2. Meter with 2 hole flange. EDFGBABOLT HOLES CProvided by IHSNot for ResaleN
4、o reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3971/1F 3 TABLE I. Specification data for type I meters. DASH NO. FIG. A B C D E F G Grade Voltage Range Readout 1 1 2.875 1.265 .150 2.210 3.00 A 10-40 10,000 9999.92 1 2.875 1.265 .150 2.210 3.00 A 40-130 10,000 9999.93 1
5、3.500 1.580 .150 2.625 3.00 A 10-40 10,000 9999.94 1 3.500 1.580 .150 2.625 3.00 A 40-130 10,000 9999.95 1 2.875 1.265 .150 2.210 3.00 B 10-40 10,000 9999.96 1 2.875 1.265 .150 2.210 3.00 B 40-130 10,000 9999.97 1 3.500 1.580 .150 2.625 3.00 B 10-40 10,000 9999.98 1 3.500 1.580 .150 2.625 3.00 B 40-
6、130 10,000 9999.99 1 2.810 1.580 .150 2.135 1.75 B 10-130 10,000 9999.910 1 3.500 1.580 .150 2.135 1.75 B 10-130 10,000 9999.911 2 2.120 1.750 .150 .900 1.950 .125 1.414 A 10-40 10,000 9999.912 2 2.120 1.750 .150 .900 1.950 .125 1.414 B 10-40 10,000 9999.9Notes: 1. Dimensions are in inches (in.). 2.
7、 Tolerances: Dimensional 0.015 in., bolt holes .005 in. unless otherwise indicated. Angular 0.5. 3. Range and readout are in hours 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 bac
8、kground Tenths: Black on white background 1.3 Dielectric strength: Voltage 200 volts rms Frequency 60 Hz Potential ac Points of application Terminals and case 1.4 Weight. 0.60 lbs. maximum Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3971/
9、1F 4 1.5 Starting. 10-40V: 1. Energize with 28V for 60 seconds at +22oC + 2o C (71.6 3.6F), de-energize for 180 seconds, repeat 3 times. 2. As above at 12V, repeat 2 times. 40-130V: 1. As above at 120V, repeat 3 times. 2. As above at 85V, repeat 2 times. 10-130V: 1. As above at 120V, repeat 3 times.
10、 2. As above at 85V, repeat 2 times. 3. As above at 28V, repeat 3 times 4. As above at 12V, repeat 2 times. The meter shall start within 10 seconds of being energized. 1.6 Stopping. The meter shall stop within 120 seconds after being de-energized. 1.7 Power supply tolerance. 10-40 volt-meters One-ha
11、lf hour at 10 volts 4 hours at 28 volts One-half hour at 40 volts 40-130 volt-meters One-half hour at 40 volts 4 hours at 120 volts One-half hour at 130 volts 10-130 volt-meters One-half hour at 10 volts 2 hours at 28 volts 2 hours at 120 volts One-half hour at 130 volts Provided by IHSNot for Resal
12、eNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3971/1F 5 1.8 Part or identifying number (PIN). The part number consists of the basic number of this specification sheet and a dash number taken from table I. Example: M3971/1-1-S Basic number Specification sheet number Da
13、sh number from Table I B (blade) or S (stud) terminal configuration Note: Specify terminal configuration; wire lead (blade) or terminal block (stud). 2.0 Changes from previous revision. The following changes were made to this document: a. power consumption requirement was removed, had been “Not appl
14、icable”. b. Para. 1.5 start time requirement added. c. Para. 1.7 tolerance data revised. d. Para. 1.8 paragraph title changed from “Part number”. Custodians: Preparing activity: Army AR DLA-GS1 Navy SH Air Force 99 (Project 6645-2008-002) Reviewers: Army AT, CR Navy AS, SA, MC, EC Air Force 11 NOTE:
15、 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-,-,-
