Kewtech Kewprove Proving Unit How to use 1. Test your voltage detector on the proving unit, by placing the probes intothe front terminals.2. The neon on the proving unit should light up & your voltage detectorshould indicate voltage.3. Test on the circuit to be tested 4. Prove your voltage detector is still working by placing the probesinto the front terminals again.5. The neon on the proving unit should light up & your voltage detectorshould indicate voltage.