Re: checking accuracy of tach

Posted by RAB on July 16, 2005 at 13:18:23 from (195.93.21.100):

In Reply to: checking accuracy of tach posted by mikeinWA on July 16, 2005 at 08:10:38:

Attach a relatively slow moving item on the pto and count the revolutions per minute and compare to theoretical. Eg count the number of ram strokes on a baler.
Attach a generator and check the frequency of the output with a DMM.
Put a strong flourescent light on a moving part and check rev counter for when it appears to stand still due to the stroboscopic effect. Calculate back from your mains frequecy to the speed of the item.
You could, of course, beg, borrow or buy an electronic tachometer and check it.........
Or get your ear calibration checked out and certificated!
Hope this helps.
Regards, RAB

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