The ISO 5000 Electronic Insulation Resistance tester has a measurement range of 500Kohm tp 50Gohm in four voltage ranges 500vdc, 1000vdc, 2500vdc and 5000vdc..
designed for measuring resistance in cables, motors, machines, transformers & ground cables etc.
The unit comes in a sturdy carry case and is powered by 4 x 1.5v batteries.
The tester also measures AC and DC volts up to 600v