Test Meter PRO TMP690 Proving Unit

Test Meter PRO TMP690 690V AC Proving Unit

The Test Meter PRO TMP690 is a compact, battery-powered 690V AC proving unit designed to verify the correct operation of two-pole voltage testers before and after testing an electrical installation. It supports the recognised prove-test-prove method used during safe isolation procedures and provides a safe, portable proving source without relying on a known live supply.

The unit is suitable for proving compatible high and low impedance voltage indicators and multimeters. It generates a nominal 690V AC output at 50Hz and features high-voltage and low-battery LED indication, automatic operation when probes are inserted and a lightweight design for everyday site use.

Part number: TMP690

Why use a proving unit?

A proving unit allows electricians to verify the correct operation of a voltage indicator before and after testing a circuit. This supports the recognised prove-test-prove method described within HSE GS38 guidance and helps confirm the tester remained operational throughout the safe isolation process.

FAQ

Why should I use a proving unit?

To verify your voltage tester before and after testing as part of the prove-test-prove procedure in order to comply with the guidance set out in HSE GS38.

Can it prove multimeters?

Yes, multimeters as well as two-pole voltage testers.

Is it battery powered?

Yes, it uses six AA alkaline batteries.

Typical Applications

• Safe isolation
• Consumer unit replacement
• Electrical maintenance
• Inspection & Testing
• Commercial installations
• Industrial maintenance
• EV charging
• Solar PV

Key Features

• Nominal 690V AC output
• Suitable for two-pole voltage testers
• Can also verify compatible multimeters
• Automatic operation
• High voltage LED
• Low battery indication
• 6 x AA alkaline batteries
• CAT II 750V
• Compact and lightweight