Fluke PRV240 Proving Unit 240 V ac/dc

This proving unit is a pocket-sized, battery-powered voltage source designed to provide a known live voltage for verifying electrical test instruments before live measurements. It supplies a steady 240V output for both alternating and direct measurements and is intended to reduce unnecessary exposure when confirming meter functionality in industrial and field environments.

• Sources 240V ac or dc to validate instrument response under load
• Compatible with high and low impedance testers for broad instrument coverage
• Recessed contact activation prevents accidental contact during test connection
• Single LED indicates presence of output voltage for Rapid confirmation
• Battery operation enables 5,000 five-second test cycles per battery set
• Magnetic hanging strap included to secure unit during hands-free checks

• Suitable for pre-checks of multimeters in electrical maintenance routines
• Ideal for field verification of clamp meters and two-pole testers
• Used with industrial automation measurement equipment for on-site validation
• Can be used for commissioning checks in mechanical and electrical installations

It operates on four AA alkaline cells and provides around 5,000 five-second test cycles with a high-impedance load

Under greater than 3 kΩ load conditions the unit supplies a reduced ac Value typical of 60V and a minimum of 50V ac rms to simulate low-impedance responses.

It functions between -10 °C and +50 °C, with defined humidity limits varying by temperature and an operational altitude up to 2,000 m.

Voltage is delivered through recessed contacts that only energise when probes are inserted, reducing the risk of accidental contact.