Calculate time error based on RTC (32.768 kHz) accuracy
Author: kusukawaExecutions: 23513
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Enter the real-time clock (32.768 kHz) accuracy to calculate the time error.
The accuracy of a 32.768 kHz real-time clock is expressed in ppm (pulses per million). Let’s calculate what this translates to in actual time error.
(Calculations assume 30 days per month and 365 days per year.)
(Calculations assume 30 days per month and 365 days per year.)
| Error per hour | seconds |
| Daily error | seconds |
| Monthly error | seconds |
| Annual error | seconds |
Explanation of RTC on the Macnica website
https://www.macnica.co.jp/business/semiconductor/articles/intel/133394/
Epson’s Real-Time Clock FAQ Page
https://www5.epsondevice.com/ja/information/support/faq_rtc/all/
Excel spreadsheet for calculating real-time clock error, accessible from Epson’s FAQ page
(This is more convenient for those who want to investigate in detail)
https://www5.epsondevice.com/ja/information/support/faq_rtc/all/rtc-calculatorv03ja.xls
https://www.macnica.co.jp/business/semiconductor/articles/intel/133394/
Epson’s Real-Time Clock FAQ Page
https://www5.epsondevice.com/ja/information/support/faq_rtc/all/
Excel spreadsheet for calculating real-time clock error, accessible from Epson’s FAQ page
(This is more convenient for those who want to investigate in detail)
https://www5.epsondevice.com/ja/information/support/faq_rtc/all/rtc-calculatorv03ja.xls
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