I use a Supernova for our routine PAT testing, I inherited it about 9 months ago from the guy who used to dothe job. We have around 2500 items dotted around the factory and i take the supernova around the different areas on a trolley.
Recently when i switch the tester on it has started freezing where none of the buttons work. i remedy this by using the old fashioned on off method. It was last serviced/calibrated in Nov 2012 and will be due in Nov this year. Has anyone got any advice or experienced this problem before?