B&B Electronics PCRTC manual Aging

Aging

All crystal oscillators have an aging characteristic. The crystal used in the PCRTC uses the coldweld manufacturing technique, which exhibits the lowest aging characteristic of 1 ppm/year. In practice, this aging rate improves significantly with time, but for practical purposes the value of 1 ppm is adequate.

To estimate the error in your application, sum the error from the three sources above. This estimate can be used to determine how frequently the time should be updated using Timeset or another method.

Documentation Number PCRTC2095 Manual 13

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105