... materials as well as various electric equipments Application: it can be used for measuring insulation resistance of insulation materials as ... * With single, dual and three rated voltage models, measuring range can be up to 1000GΩ* Logarithmic scale, dual scales, auto-ranging ... even on high insulation range. * Timer& hold function(h model).The pointer can be hold at moment of 15s ,60s ,10min for ...