1、AMSC N/A FSC 6645 INCH-POUND MIL-DTL-7793/13A 19 October 2012 SUPERSEDING MIL-M-7793/13 15 December 1988 DETAIL SPECIFICATION SHEET METER, TIME TOTALIZING, MINIATURE, DIGITAL, 5 VDC, PRINTED CIRCUIT MOUNT This specification is approved for use by all Departments and Agencies of the Department of Def
2、ense. Reactivated after 19 October 2012 and may be used for new and existing designs and acquisitions. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-7793. FIGURE 1. Bottom view. Provided by IHSNot for Resale-,-,-MIL-DTL-7793/13A 2 F
3、IGURE 2. Top view and pin assignment. REQUIREMENTS: 1. Dimensions. Dimensions are in inches. Unless otherwise specified, tolerances are .02 for two-place decimals and .015 for three-place decimals. 2. Dielectric strength. The meter shall be subjected to 600 VRMS (at 25 C 5 C) and 350 VRMS (altitude)
4、. The test voltage shall be applied between the power terminals (+5 VDC and common) and an external ground which contacts the meter case on the five sides without terminals. 3. Life accuracy. Meter accuracy shall be 0.1 percent from -65 to +125 C and 4.5 to 10 VDC. 4. Power consumption. Power consum
5、ption at 5 volts direct current (VDC) shall not be greater than 2 milliwatts. 5. Ripple voltage. The meter shall operate normally when subjected to a 2 volt peak (4 volts peak-to-peak) ripple between 10 Hz and 10 KHz superimposed on 7.0 VDC. Provided by IHSNot for Resale-,-,-MIL-DTL-7793/13A 3 6. Op
6、erating temperature range. The operating temperature range shall be from -65 to +125 C. 7. Part number. The part number shall be M7793/13-1. 8. Time range. Total readout of the meters shall be 99999.99 hours. 9. Meter output. The output from the meter shall be in a serial binary coded decimal format
7、. The output impedance shall be 100K 10%. A logical “zero” shall be between 0.0 and +0.2 volts. A logical “one” shall be between +3.3 and +6.6 volts. The output pin assignments are shown on figure 2 and the output data format is shown on figure 3. FIGURE 3. Output data format. 10. Transient protecti
8、on. When operated on DC, no temporary or permanent degradation shall be produced in the meter when subjected to 25 volt transients of 10 microseconds duration occurring at a 1 millisecond repetition rate. 11. Voltage range. The operating voltage shall be from 4.5 to 10 VDC. 12. Weight. Weight shall
9、be not greater than 0.2 ounce. 13. Thermal shock. In lieu of thermal shock, 100% environmental thermal stress screening may be performed on 100% of meters supplied under this specification sheet. Provided by IHSNot for Resale-,-,-MIL-DTL-7793/13A 4 14. Environmental thermal stress screening test pro
10、file. Temperature range: -65 C to +125 C Temperature rate of change: 2 C/minute minimum (chamber air temperature) Temperature dwell duration: 30 minutes minimum Temperature cycles: 5 cycles minimum Power on/Equipment operating: Power at 10 VDC for DC Meter or 26 VAC/400 Hertz for AC Meter The meter
11、shall be turned on and off a minimum of 3 times at each temperature extreme (-65 C and +125 C) for each cycle. 15. Qualification tests. Qualification tests shall be conducted in accordance with MIL-DTL-7793, except that the voltage, temperature, accuracy and thermal shock or environmental stress scr
12、eening shall be as specified herein. Hermetic seal, salt spray and moisture resistance test is not applicable. 16. 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. NOTES: 1. This uni
13、t is intended for use on printed circuit boards. All connections are expected to be made via printed wiring, and the output to be brought to a data collection point for system reading or to a single dedicated connector (see Note 2). 2. Elapsed time is read from the M7793/13-1 meter by mating the pri
14、nted wiring board connection with the M7793/12-1 readers connector and operating the reader. Custodians: Preparing activity: Army - MI Navy - AS Navy - AS (Project 6645-2012-015) Air Force - 99 Review activities: Navy - OS, SH 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 Resale-,-,-
