Insulation resistance: 100k?-10T? (105~1013?), accuracy: <1G: 1%, ?1G: 3%, ?10G: 5%, ?1T: 10% Test voltage: 1.0VDC~1000VDC (arbitrary adjustment), accuracy: 1% charging time: 0~999.9s, maximum charging current: 30mA±5mA Features: VFD display, insulation resistance and leakage current two-parameter measurement, 9999 readings, up to 55 tests 30 sets of comparators, sound and light alarm, RS-232 and handler interface, keypad lock The AT683 High Resistance Meter is an MCU controlled measuring instrument for direct readout of resistance and current. The voltage applied to the device under test (DUT) is programmable from 1 to 1000 volts. A pass/fail indicator provides a visual display of test results based on a preset limit. The AT683 High Resistance Meter is designed for measuring very high resistance and related parameters of insulation materials, electronic components, and electro-mechanical components.