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This unit is guaranteed working and can be returned for a full The SC-10 watt-hour standards are rugged, portable and specifically designed to test watt-hour meters, using the comparison method, in the field or the laboratory. The SC-10 standards are engineered to meet the most stringent quality measurements in regard to accuracy, stability and reliability. They are one of the top most accurate Input Voltage: 120, 240, 480 VAC Input Current: 1.0 to 50 Amps. Power Factor: See accuracy definition Ambient Temperature: 68° to 86° F (20° to 30° C) Auxiliary Power Voltage: 120, 240, 480 VAC Recalibration Interval: 365 days Shock and Vibration: Any, which is nondestructive All errors are in percent of reading at any combination of the normal operating conditions. Note that stability is included within the maximum accuracy specifications for Watt-hours. At Unity Power Factor (0°) ±0.01% typ, ±0.05% max ±0.035% typ, ±0.1% max At 0.5 Lag Power Factor (-60°) ±0.02% typ, ±0.05% max ±0.025% typ, ±0.1% max At Power Factor P<0.5 Lag ±0.05% P maximum ±0.003%/ ° C maximum to -20° to+70° C (-4° to +158° F) |
