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Author Topic: Harkness Digital Screen Verifier Pietro Clarici Expert Film Handler Posts: 136 From: Foligno (PG) Italy Registered: Sep 2008 posted 08-29-2016 10:07 AM                        Has anyone tried the Harkness app for iPhone? I'm not expecting it to be as accurate as a professional meter, but I was wondering if it could be useful to do approximate spot checks and track lamp brightness decay.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 08-29-2016 01:51 PM                     You should try to check it against a known calibrated meter to see exactly how it behaves at say 10 to 16 fl levels. Once the tracking (Or the tracking offset) is known, then yes, you could use it. Mark  |  IP: Logged Pietro Clarici Expert Film Handler Posts: 136 From: Foligno (PG) Italy Registered: Sep 2008 posted 08-30-2016 01:27 PM                        I'll definitely measure the reference values that every time my technician comes around with his equipment, just wanted to know if I can expect it to be somewhat consistent or if the measurements are all over the place.  |  IP: Logged Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 08-30-2016 03:04 PM                        I think it is unlikely that the projector and meter would drift the same amount and direction. If readings are stable, I suspect the projector is stable. Harold  |  IP: Logged

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