Martindale PD440SRD Proving Unit 440V None RS Calibration

Proves the operation of voltage indicators, multimeters and test lamps up to 440V
The PD440SRD is fast and easy to use, instantly supplying the full test voltage for both high and low-impedance voltage indicators, test lamps and meters. It comes complete with an over moulded low-profile case with a magnetic hanger. Ideal for proving indicators and measurement devices up to 440V AC or DC in commercial and industrial applications.
Switchable AC / DC output mode via push button
Stepped voltage output matched to two-pole tester thresholds

Tough overmoulded low profile design
Long battery life with low battery indicator and auto power off