Field Testing the TPI 505L Photo Tachometer
It’s easy to test your 505L to make sure it is operating properly. First, point the 505L at the palm of your hand and press the on button. You should see light from the output lens. Second, point the 505L at a fluorescent light and press the on button. The reading should be 7200 RPM +/- 5 RPM.
Model 505L Applications