Insulation resistance testers

No scale multipliers
Various test voltages for spot and step voltage testing
Watchman terminal to dispense with surface spillage current

Convenient, independent instruments intended to give fast and exact estimations. Four of the models highlight a simple presentation having four selectable test voltages of 100, 250, 500 and 1000 V dc, estimating protection opposition up to 2000 Mω and an ohm range to 5000 ohms. The other model has four test voltages of 50, 100, 250 and 500 V dc estimating protection obstruction up to 1000 Mω.
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