MS27651G
TABLE I. Mounting hole code letter.
Code Letter |
Mounting Holes |
Applicable Figure |
A |
NO. .112-40 UNC-2B Tapped Holes |
1 |
B |
NO. .112-40 UNC-2B Tapped Holes |
1 (with flange rotated 90°) |
C |
.125 DIA Clearance Holes |
1 |
D |
.125 DIA Clearance Holes |
1 (with flange rotated 90°) |
E |
NO. .112-40 UNC-2B Tapped Holes |
2 |
F |
NO. .112-40 UNC-2B Tapped Holes |
2 (with flange rotated 90°) |
G |
.125 DIA Clearance Holes |
2 |
H |
.125 DIA Clearance Holes |
2 (with flange rotated 90°) |
REQUIREMENTS:
1. Dimensions. See figure 1 or figure 2, as applicable.
2. Electrical. Unless otherwise specified, all tests shall be at room pressure and temperature, approximately +25° C. All voltages shall be in accordance with MIL-DTL-7793, except lower voltage limit shall be 100 instead of 102.
3. Meter range. 0 to 10,000 hours, meter will read 9999 hours maximum.
4. Scale designator. Hours
5. Mounting flange. The surface of the mounting flange shall be tin plated per
ASTM-B545, 0.0002 to 0.0004 inch thick to provide electrical ground for case (see figures 1 and
2).
6. Input power. The input power shall be 1.0 watt nominal, 1.5 watts maximum.
7. Input voltage. The input voltage shall be 115 volts ±15 volts.
8. Frequency. The frequency shall be 400 ±20 Hz.
9. Current. The current shall be 15 milliamperes maximum.
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.
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