Question - How many counts is an acceptable number to be off in Counts per mile when using 2 different calibration courses? All rides were done in a span of 45 to 50 minutes.
1st Calibration course - 1000 feet
Start - 92658
1 - 96035 - 3377
2 - 99413 - 3378
3 - 102788 - 3375
4 - 106166 - 3378
Gives you an average of 3377 or 17848.39 counts per mile
2nd Calibration course - 1320 feet
Start - 14736
1 - 19196 - 4460
2 - 23656 - 4460
3 - 28116 - 4460
4 - 32578 - 4462
Gives you an average of 4460.5 or 17859.84 counts per mile.
Total difference between the 2 counts per mile is 11.45 counts. This seems a little high to me. I am wondering if anyone has used 2 different calibration courses and how much the 2 calibration courses were off?
So lets say I used Calibration course #1 to measure the 5k course. 17848.39*3.106856= 55452.38. I make sure the course is 55452.38 counts. Heading home my wife calls and says a big rain storm is at my calibration course so I get on the web site and find a calibration course close to were I am at and no rain so I do my 4 rides on calibration course number 2. Now I find out I am 10.51' short from what I measured and go back and correct the course.
Now lets say it is the other way around that i use calibration course 2 for the measurement and use course 1 for the post calibration and now I would be 10.81' too long.
So is 11.45 counts per mile between the 2 rides too big of a difference or would that be an acceptable difference?
Thank you for any input on this and maybe I am looking at it all wrong.