10 Clamp-on Meter Models 501 and 503Resistance (Ω)Range Measurement Resolution Accuracy Max Test Voltage400Ω 0.2 to 399.9Ω 0.1Ω 1% Rdg ± 2cts 1.5VDCOverload protection: 600VrmsContinuity ( )Range Beeper Activation Max Test Voltage< 40Ω 1.5VDCOverload protection: 600VrmsFrequency (Hz) (Auto-ranging)Input Range Resolution Accuracy Min. InputSignalCurrent 20 to 3999 Hz 1 Hz 0.1% Rdg± 1ct 2Arms4.00 to 10.00 kHz 10 HzVoltage2 to 3999 Hz 1 Hz0.1% Rdg± 1ct 5Vrms4.00 to 39.99 kHz 10 Hz40.0 to 399.9 kHz 100 HzInput Impedance: 1MΩOverload protection: 600Vrms or 600Arms3.1.2 Model 503DC Amperes (Auto-ranging)Range Measurement Resolution Accuracy40A 0.10 to 39.99A 0.01A 2.5% Rdg ± 10cts400A 40.0 to 400.0A 0.1AOverload protection: 600ArmsAC Amperes (Auto-ranging)Range Measurement Resolution Accuracy40A 0.05 to 39.99A 0.01A 50 to 60Hz: 1.5% Rdg ±10cts60 to 500Hz: 2.5% Rdg ±10cts400A 40.0 to 400.0A 0.1AOverload protection: 600Arms