The Fluke PRV240 Proving Unit is a portable, pocket-sized, battery-powered voltage source. It is unique in that it sources stable ac and dc voltages for both LoZ and HiZ instruments.

Sources both ac and dc steady-state voltage - supplies 240 V DC/AC
A single LED indicates functionality, making this unit a simple-to-use solution for verification of your test tool
Compatible with both high impedance or low impedance multimeters, clamp meters or two pole testers
Voltage is sourced through recessed contacts that are activated when tested probes are inserted to avoid accidental contact

Fluke PRV240 Proving Unit, TPAK hanging strap, Four AA batteries and Instruction sheet.

Mains Voltage Indicators - Contact