Martindale PD230SRD Proving Unit 230V None RS Calibration

The PD230SRD 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 230V AC or DC in domestic and commercial applications.
Switchable AC / DC output mode via push button
Stepped voltage output matched to two-pole tester thresholds