What is my Loggers clock accuracy and how is it checked at the factory?
The Logger does not have a clock, but uses a timing circuit, based on a highly accurate oscillator (approximately 30ppm). As with all oscillators, high temperature affects them. However, in the case of the oscillator used in your Logger, the actual impact is not significant. For example, in the worst case where a Logger was operating at 150°C for 24 hours, the timing would be off less than 30 seconds. Timekeeping accuracy is evaluated inherently as part of the calibration process for each Logger. Initially, during the calibration procedure, the Logger is programmed on the computer which is used to operate the calibration bath and log the reference temperatures. Following programming, the Logger is immersed in the bath and the computer commands the bath to go to a certain temperature. When the bath software detects that the bath temperature is stable enough, measurements are taken with the reference thermometers. After the measurements are recorded, the bath is commanded to change to th
