Further information for Ch. Beha 4636971 - Fluke 117 / PRV240 multimeter Proving Unit Kit
Fluke 117 Multimeter with PRV240. PRV240 is the only battery-powered voltage source that can be used to verify the meter before taking actual measurements when a known voltage source is not available. Verifying the meter before taking a measurement is recommended by both GS38 and NFPA70E.