Watch Timing Machine NO.1000 Multifunctional Accurate Calibration LCD Screen Mechanical Watch Timegrapher 100‑240V Item Type: Timegrapher Watch Timing Machine Material: PC 1. Rate: The speed at which the watch runs in seconds per day. If it's significantly over these ranges, you should bring it to a watchmaker to have it examined. Excellent quality: - +/- 7 s/d Acceptable: - +/- 20 s/d 2. Amplitude: The amount of rotation in the balance wheel's oscillation. A healthy movement should have a high amplitude when fully wound. Low amplitude usually indicates a problem that needs to be addressed before adjusting, like impediments due to foreign elements, dried oils, etc, but anything over 250 degrees can still be considered a healthy amplitude. Excellent: 270-310 Acceptable: 250-270 3. Beat Error This is the difference in time between the "tick" and the "tock". Excellent: 0.0 - 0.5 milliseconds Acceptable: 0.6 - 1 milliseconds 4. Parameters (Beats) The number should toggle between a 5 digit number and a degree. The 5 digit number is the beat frequency, meaning how many ticks there are in a second. Standard bph rating values: 14,400 bph = 4 beats/second 18,000 bph = 5 beats/second 21,600 bph = 6 beats/second 28,800 bph = 8 beats/second 36,000 bph = 10 beats/second Degree is Lift Angle, which should manually be set before using the timegrapher, the reason you need to input this into the timegrapher is so you can calculate the amplitude. You can find the exact number from the official specs of the movement. Most modern watches have a lift angle of 52 degrees.