Megger is the manufacturer of graphical insulation resistance tester 5 kv. The product is available in model si-5010. The graphical insulation resistance tester is an advanced insulation tester for measurement of insulation resistance of all types of electrical equipment. The instrument performs automatic tests, enabling consistent operation without operator input, plus stores results and can be operated from a pc. The unique features of the graphical insulation resistance tester 5 kv are: