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Digital Ground Resistance Tester Model 4500
Charging Time: 14 hours typical
Charging Supply Voltage:Internallyselectable110/220V,45to450Hz
Low Battery Indication: Battery can be recharged with built-in dual volt-
agechargingunit:94to127Vor187to253V(47to450Hz).
WARNING: Do not fully discharge batteries.
Fuse Protection: 250Vrms(measurementcircuit)via3.15A250Vfuse
3.2 Accuracy