MEGOHMMETER
To measure a high value resistance, techniques for measuring a low value current are used. A constant voltage source (DC Voltage) is applied to the resistance to be measured and the resulting current is read on a highly sensitive ammeter circuit that can display the resistance value (in MΩ, GΩ, TΩ) A Megohmmeter is also called a high resistance tester, a teraohmmeter , a megger, a high insulation tester
