INSULATION - Test Voltage (DC V) 250V/500V/1000V - Measuring Ranges (Auto-Ranges) 250V : 0-1000M Ohm, 500V : 0-2000M Ohm, 1000V : 0-3000M Ohm - Output Current 250V : 1mA DC min at 0.25M Ohm, 500V : 1mA DC min at 0.5M Ohm, 1000V : 1mA DC min at 1M ...