1、AMSC N/A FSC 6645 INCH-POUND MIL-DTL-7793/9C 19 October 2012 SUPERSEDING MIL-DTL-7793/9B 29 March 2004 DETAIL SPECIFICATION SHEET METER, TIME TOTALIZING, MINIATURE, DIGITAL, 115 V, 400 Hz Reactivated after 19 October 2012 and may be used for new and existing designs and acquisitions. This specificat
2、ion is approved for use by 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-DTL-7793. FIGURE 1. M7793/9-001. Provided by IHSNot for ResaleNo reproduction or networking permitted wi
3、thout license from IHS-,-,-MIL-DTL-7793/9C 2 FIGURE 2. M7793/9-001A through M7793/9-004A REQUIREMENTS: 1. Meters mounted by the front surface of the mounting flange shall have mounting flanges tin-plated on the front surface in accordance with ASTM-B545 to provide an electrical ground for the case.
4、The rear surface of the mounting flange shall be tin-plated for meters designed to be mounted by the rear surface of the mounting flange. 2. The alternate configuration Figure 2 unit is permitted to use a copper nickel material for the flange in accordance with MIL-C-15726 material alloys C70600 or
5、C71500. Either alloy is allowed provided that the part meets the requirements of this specification sheet. The applicable flange conductive surface specified in Table I shall be unpainted to provide an electrical ground for the case; or use the method of requirement 1. 3. Meter faces shall designate
6、 with proper marking HOURS or HOURS AND TENTHS (see Table I and Note 3). 4. To accommodate meters with round or rectangular castings, the mounting hole shall be not less than 1.657 inches in diameter (see Note 1). 5. Meters shall meet the performance requirements in Table I. 6. Meters in accordance
7、with Figure 2 shall have a mounting kit of four Phillips head (#4-40) screws, washers, and hex nuts supplied with each unit. 7. If a separate meter face is used, it shall be fastened to the meter by a Phillips head screw (#4-40), washer and nut (see note 5). Provided by IHSNot for ResaleNo reproduct
8、ion or networking permitted without license from IHS-,-,-MIL-DTL-7793/9C 3 TABLE I. Meter performance requirements. Performance requirement Figure 1 Part Number M7793/9-001 Figure 2 Part Number M7793/9-001A and M7793/9-003A Figure 2 Part Number M7793/9-002A and M7793/9-004A Life accuracy 1.0% at 400
9、 Hz 0.1% at 400 Hz 0.1% at 400 Hz Voltage range 100-130 VAC 100-130 VAC 100-130 VAC Frequency range 380 to 420 Hz 380 to 420 Hz 380 to 420 Hz Operating temperature range -65C to +125C -65C to +125C -65C to +125C Time readout maximum 9999 or 9999.9 hours 9999 or 9999.9 hours 99999 hours Power consump
10、tion 3 watts maximum At 115 V 400 Hz 900 milliwatts average at 115 V 400 Hz 900 milliwatts average at 115 V 400 Hz Dielectric strength 500 VAC at 0.82 inches of Hg 600 VAC at sea level and 350 VAC at 0.82 inches of Hg 600 VAC at sea level and 350 VAC at 0.82 inches of Hg Weight 9.0 oz maximum 2.5 oz
11、 maximum 2.5 oz Maximum Flange conductive surface Optional M7793/9-001A rear M7793/9-003A frontM7793/9-002A rear M7793/9-004A - front NOTES: 1. Meters supplied under M7793/9 may have either round or rectangular castings. Users are cautioned to leave sufficient space to accommodate either shape for r
12、eplacement purposes (see requirement 4). 2. All dimensions are in inches. Unless otherwise specified, tolerances are 0.015 (three decimal) and 0.02 (two decimal). 3. Tenths of hours readout is optional for M7793/9-001, M7793/9-001A and M7793/9-003A. 4. M7793/9-001 supersedes and is a direct replacem
13、ent for MS28053-6. Applications that require M7793/9-001 may also use M7793/9-001A. 5. Meters may be supplied with an attached flange or a flange with a meter face separate from the meter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-7793/
14、9C 4 8. Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. Referenced documents. In addition to MIL-DTL-7793, this specification sheet references MIL-C-15726 and ASTM-B545. Custodians:
15、 Preparing activity: Army - AR Navy - AS Navy - AS (Project 6645-2012-011) Air Force - 99 Review activity: DLA - GS1 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 https:/assist.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
