Safely proving a circuit to be dead requires the use of a voltage indicator and a known live source to test the indicator, both prior to and after checking for the presence of voltage. The combination of the Martindale VT28 voltage indicator and PD690SRD proving unit allows you to do just that, ensuring that you always have a known source to test against.

The VT28 is a two-pole voltage indicator with bright LED indicators as well as a clear LCD display. It will indicate the presence of AC or DC voltages from 12 to 690V. Additional functions include audible and visual continuity, single-pole phase test and phase-rotation testing. A built-in torch, and dual-layer cable insulation are excellent safety features. The inner cable insulation is a red colour, contrasting with the black outer insulation, so any damage to the cable is obvious and you know it is not safe to use the indicator.

Martindale's PD690SRD proving unit will light all the LEDs on the indicator, ensuring it is working correctly. It also features a battery warning indicator so you know when they need replacing, avoiding false readings from failing batteries.The complete kit is supplied with a TC70 carry case with neck strap, making it easy to transport and use.

• LED & LCD indication
• Measures 12 to 690V AC and DC
• Probe caps for GS38 compliance
• PD690SRD proving device
• Carry Case with Neck Strap
• Martindale type VT28/PD