HP48 Clock error data results

[TomC]

I've got several HP48G series machines that have been running for almost 2 weeks now.

Each one shows an error of about -1.88 seconds per day ( although one was -1.5, another -3.3). This means that if one were to set a daily alarm with code that performs 15400 CLKADJ, the calculator would have a more accurate clock. So, the CLKADJ factor will vary from machine to machine.

[I've added a factor to a couple machines and do the daily alarm CLKADJ adjustment and these have maintained about 0.5 second daily accuracy.]

My next step is to write code that will update the needed adjustment parameter. The machine will maintain the updated CLKADJ parameter and we should see it converging to some value. This of course is assuming that the calculators inaccuracy is consistent over time.

TomC