MS27650G
10. Accuracy. Accuracy shall be 0.1 percent or 1 hour, whichever is greater. Note: Accuracy is degraded at the same percent as the percentage change in input frequency plus the specified accuracy tolerance.
11. Weight. The weight shall be a maximum of 0.7 ounce.
12. Transient protection. No temporary or permanent degradation or other malfunction shall be produced in the time totalizing meter if the input voltage should increase to +41 Vrms at
320 to 480 Hz for a period of 150 mlliseconds maximum.
13. Case finish. The case shall be finished in a durable, dull or semi-gloss black color.
14. Marking. The meter shall remain clearly and legibly marked with the following information after subjection to the environmental requirements:
(a) Part number, MS27650 (and dash number from Table II and mounting hole code letter from Table I). Example: MS27650-01.
(b) Source and date code per MIL-STD-1285. (c) Nominal voltage and frequency.
TABLE II. Dash numbers and dimensions.
Dash Number |
DIM. A ± .015 |
Dash Number |
DIM. A ± .015 |
-01 |
.000 |
-14 |
.406 |
-02 |
.031 |
-15 |
.438 |
-03 |
.062 |
-16 |
.469 |
-04 |
.094 |
-17 |
.500 |
-05 |
.125 |
-18 |
.531 |
-06 |
.156 |
-19 |
.562 |
-07 |
.188 |
-20 |
.594 |
-08 |
.218 |
-21 |
.625 |
-09 |
.250 |
-22 |
.656 |
-10 |
.281 |
-23 |
.688 |
-11 |
.312 |
-24 |
.719 |
-12 |
.344 |
-25 |
.750* |
-13 |
.375 |
-26 |
.781* |
* Does not apply to figure 2.
15. Conformance inspection. The following tests, run in the order shown on all meters, supersede the individual tests and sampling Plans A and B specified in MIL-DTL-7793. The maximum meter reading at the time of delivery shall be 0001.
(a) Examination of product.
(b) Operational check. Ten operations for instant starting at room temperature, approximately 25°C. Five of these ten operations at 29 V, 380 Hz and the other five operations at 23V, 420 Hz.
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