Martindale vipdlok150 with vi 15000 voltage indicator and pd690 proving device martindale vipd150 martindales vi 15000 voltage indicator and pd690 proving device in a money saving bundlethe pd690 proving device produces 700v acdc to check the operation of the vi 15000 voltage indicator before and after use enabling you to comply with health and safety recommendations for safe working it is a portable battery powered unit with the option of being driven from a 12v supply via a car or mai