The Fluke PRV240 Proving Unit is a portable, pocket-sized voltage source that provides stable AC and DC voltages for verifying multimeters, clamp meters, and two-pole testers. It is compatible with both high impedance (HiZ) and low impedance (LoZ) instruments, with voltage sourced through recessed contacts that activate only when probes are inserted.

The PRV240 supports the “Test Before Touch” (TBT) safety protocol, allowing technicians to verify their test tool against a known voltage source before and after live measurements. This reduces the need for personal protective equipment (PPE) when a known voltage source is unavailable, while still ensuring tool functionality. The unit delivers 240V AC and DC steady-state voltage and performs up to 5,000 tests on a set of four AA batteries.

Safety rated to IEC 61010-1 and IEC 61010-2-030, the PRV240 provides a safe and reliable method to validate test tool operation without unnecessary exposure to shock and arc flash hazards.