| MEASUREMENT RANGE | 0.0 TO 60.0 DECIBELS SINGLE INDICATOR SINGLE RANGE |
| ACCURACY IN PERCENT | -1.0 TO 1.0 AT FULL SCALE SINGLE INDICATOR ALL RANGES |
| SCALE DIVISION QUANTITY | 12 SINGLE INDICATOR SINGLE RANGE |
| DIAL SCALE MARKING COLOR | BLACK SINGLE INDICATOR SINGLE RANGE |
| BACKGROUND COLOR | WHITE SINGLE INDICATOR SINGLE RANGE |
| MOVEMENT TYPE | MOVING IRON VANE |
| MOVEMENT SUSPENSION METHOD | JEWEL PIVOT BASE |
| CIRCUIT ATTACHMENT METHOD AND QUANTITY | 2 CONNECTOR, RECEPTACLE |
| SCALE SELECTION METHOD | SWITCH |
| POWER SOURCE | EXTERNAL |
| OPERATING VOLTAGE RATING IN VOLTS | 115.0 AC NOMINAL AND |
| 230.0 AC NOMINAL |
| FREQUENCY RATING | 50.000 HERTZ MINIMUM AND |
| 60.000 HERTZ MAXIMUM |
| PHASE | SINGLE |
| STYLE DESIGNATOR | RECTANGULAR OR SQUARE |
| OVERALL HEIGHT | 6.500 INCHES NOMINAL |
| OVERALL LENGTH | 11.000 INCHES NOMINAL |
| OVERALL WIDTH | 5.125 INCHES NOMINAL |
| SURFACE TREATMENT | ENAMEL |
| FEATURES PROVIDED | ELECTRICAL OVERLOAD PROTECTION AND |
| ZERO ADJUSTER |
| ENTRY DATE | 71-01-15 |
| FUNCTIONAL CLASSIFICATION | AA-1.1 |
| TYPE/MODEL DESIGNATION | AN/USM-224 |
| FUNCTIONAL DESCRIPTION | TRUE ROOT-MEANSQUARE VOLTMETER USED TO MAINTAIN AN/ARN-52 AND AN/ASN-64 |
| RELATIONSHIP TO SIMILAR EQUIPMENT | INTERCHANGEABLE W/6625010123255 AND 6625004423585 |
| REFERENCE DATA AND LITERATURE | TB9-6625-0011-50,TB11-6625-1227-15 |