SpecificationsNote: Specifications given for 60 Hz distribution systems; if 50 Hz,please consult factory.Accuracy (see chart on following page):± 2% of reading ± 1 ct from 10% to 100% of rangeTest Current Ranges:2 mA, 10 mA, 50 mAMaximum Auxiliary Electrode Resistance:Ry: 50 kΩ on 20Ω, 200Ω, 2000Ω, and20 kΩ ranges; 5 kΩ on 2Ω rangeRz: 2 mA range: 15 kΩ10 mA range: 3000 Ω50 mA range: 400ΩNoise Influence on Accuracy:0.5% of range (max) to 40 V peak-to-peak (20 x peak)Operating Frequency:128 Hz square waveDielectric Test:2000 V rms, 50/60 Hz between four interconnected measuring terminalsand any external metal ground2000 V rms, 50/60 Hz between line input and measuring terminals onfront panel6 Digital Ground Resistance Tester Model 4500Ranges 2Ω 20Ω 200Ω 2000Ω 20 kΩResolution 1 mΩ 10 mΩ 0.1Ω 1Ω 10ΩRecommended 10 mA 2 mA, 10 mA, 2 mA 2 mAcurrent ranges or 50 mA 50 mA 10 mA 10 mA