MS21341H
NOTES:
1. Dimensions are in inches.
2. Unless otherwise specified, tolerance is ±.02 for two place decimals and ±.005 for three place decimals
3. For design feature purposes, this specification sheet takes precedence over documents referenced herein.
4. Referenced documents shall be of the issue in effect on the date of invitation for bid.
5. Optional radius applies to all corners and edges.
6. Exposed tin plate on this surface of mounting flange only, per ASTM-B545, to provide an electrical ground for the case.
7. Marking surface is optional. Marking must not be obscured by mounting bracket.
8. Polarity marking (+) near positive terminal on this surface. REQUIREMENTS:
1. Dimensions. See Figure 1 and Table I.
2. Electrical. Unless otherwise specified, all tests shall be at room pressure and temperature, approximately +23 °C.
3. Meter range. 0 to 9999 hours.
4. Scale designator. Hours
5. Mounting flange. Per Note 6 above, tin-plate .0002 to .0004-inch thick to provide means for electrical ground of the case (see Figure 1).
6. Transient protection. No temporary or permanent degradation shall be produced in the meter for the input voltage and time values shown on Figure 2 and Figure 3 (80V and 600V transient, respectively).
7. Ripple protection. The meter must maintain the accuracy specified in Table I when subjected to a cyclic peak of ripple voltage of less than 2.0 VDC and the frequency-voltage coordinates of Figure 4.
8. Operational check. The meter shall register accurate time over the input voltage range specified in Table I between -65 °C and +125 °C.
9. Case finish. The case shall be finished in a durable, dull or semi-gloss black color.
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