(41CX) Stopwatch Accuracy

[SlideRule]

An excerpt from The Analysis of the Stopwatch Accuracy in the Electronic Calculator HP-41 CX, YU ISSN 0352-2651, 1990, 9 pages

Abstract: The accuracy of the stop watch in the electronic calculator HP 41 CX (the older model in which were more chips on the electronic plate) is analysed. By the analysis it was found that it is necessary to control the time displayed on the stopwatch dial with the radio time signals every 20 minutes during the observation on the geoid stations to determine the geographical latitude. The rms error of the time of the stopwatch is in that case approximately ∓ 0.005 s.

1. Introduction

… automatization was obtained using an electronic calculator Hewlett-Packard 41CX …
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… it was observed that the stop watch HP 41CX calculator during a half hour work, has changes of the rate

2. Analysis of the stop watch accuracy
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… the stop watch HP 41 CX was so arranged that the stop watch rate during the whole day was approximately equal to zero …
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3. Conclusion
The accuracy of the stop watch installed in the electronic calculator HP 41CX … that the rms error of the stop watch in the HP 41CX were …
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References
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SlideRule

[rprosperi]

Nice find SlideRule, thanks for posting this here. This surfaced many years ago but was then lost and haven't seen it since. Now safely saved!

Thanks!

[SlideRule]

You're welcome, happy to contribute; see you at the upcoming HHC conference.

BEST!
SlideRule

[rprosperi]

(07-18-2024 06:19 PM)SlideRule Wrote:  You're welcome, happy to contribute; see you at the upcoming HHC conference.

BEST!
SlideRule

Great, looking forward to seeing you there, I had not seen you in the registration list yet. Looks like attendance will be good this year!!