High voltage measuring instrument GM3125 Features: Automatic unloading function for easy operation. LCD backlight function. Digital display of measurement results. Warning line and buzzer warning. Automatic switch-off function, the instrument switches off automatically after 10 minutes without any operation. External DC power supply (DC12V, 1A power adapter) can be used for measurements. Product parameters: Display. LCD shows up to 999 counts (1000 counts at 1T). Over limit indication. ol: Marker appears in insulation resistance range. lo: Marker appears in voltage range. .5 to 10 counts/sec. Operating environment: temperature 0-40 / humidity: below 85%. Storage environment: Temperature: -20 to 60 / Humidity: less than 90%. Withstanding voltage: AC 8320V (50/60Hz) / 5 seconds (between circuit and peripheral devices). Current consumption: approx. 1000 mA (max.) (normally maintained at approx. 25 mA). Battery life: approx. 15 hours. Dimensions: 153x96x220 mm. Weight: 1032 g (excluding battery and test leads). Insulation resistance test: rated voltage: 500 volts. Measuring range: 1.5 km/h.