505 High Voltage Insulation Tester Measures Insulation Resistances Up To 1 T Ohm Simpsons Model 505 High Voltage Insulation Tester is capable of measuring insulation resistances from 10 kilohms to 1 teraohm with eight selectable test voltages up to 5000 V. As a safety feature, the insulation tester acts as an AC/DC voltmeter to measure the absence of voltage in networks up to 2000V. For added safety, the cables are permanently attached, preventing possible injury that could occur by the accidental removal of the cables. The Model 505 features automatic discharging capability of capacitive units under test and a lock in test switch, for hands-free operation. An optional guard cable is available to minimize surface leakage errors. Two LEDs indicate the selected measuring range, and one LED signifies valid measurements. Each tester comes in a padded carrying case with permanently connected cables and test probes, 2 alligator clips and a plug-in battery module with batteries. Eight Test Voltages: 100, 250, 500, 1000, 1500, 2000, 2500, and 5000 VDC High Sensitivity, Direct Resistance Reading to 1T (1,000,000 M ), no Multipliers Voltage Measurement to 2000 V AC/DC Battery Powered Built in Battery Test and Battery Charge Indicator Ordering Information Accessories Catalog Number 505 High-Voltage Insulation Tester 12505 Guard Cable with Alligator Clip 45065 Replacement Alligator Clips (pair) 45066 1 Rev. 04-15 505 High Voltage Insulation Tester Measuring Ranges Insulation Resistance Nominal/Open-Circuit Measuring Nominal Short Circut Intrinsic Voltage Range Current Current Error (1) 100V 250V 100K to 1 mA 1.3 mA 2.5% 100M 500V 1000V 100V / 1500V 0.7 mA 250V / 2000V 0.5 mA 10K to 1.3 mA 5% 1 T 500V / 2500V 0.4 mA 1000V / 5000V 0.1 mA (1) Referring to scale length Direct and Alternating Voltage Measuring Internal Maximum Intrinsic Range Frequency Resistance Overload Error (1) 0 to 2000V AC/DC 15Hz to 500Hz 5M 2200V AC/DC max. 10s 5% (1) Referring to scale length 2 Rev. 04-15