Casio SP-400 (2)
Timing Data
This watch has been a pleasant surprise as it has performed admirably, right out of the box.
Results so far...
Day | Deviation | SPY | Correction |
0 | -0.142 | 0 | |
20 | 0.236 | 6.9 | |
61 | 0.67 | 4.8 | |
88 | 1.094 | 5.1 | |
96 | 1.214 | 5.1 | |
105 | 1.322 | 5 | |
111 | 1.374 | 4.9 | |
117 | 1.514 | 5.1 | |
124 | 1.588 | 5 | |
130 | 1.62 | 4.9 | |
137 | 1.792 | 5.1 |
Graph showing trends in deviation from Standard Time (in seconds) and rate (in seconds per year)
A Note on the Accuracy and Reliability of Timing Results
There is always going to be an unknown margin of error in any method of timing, and I estimate that each timing event could be off by as much as 0.1 second (though in practice I believe my results to be somewhat better than this). As a consequence of this potential margin of error, results over short periods of time are unreliable. Ultimately, the only result that matters is that which comes at the end of a full 365 days. Where interim results show consistent timings or steady trends, however, then it is safe to assume that those results are fairly accurate.