Thanks for the quick reply,
I have done a check on the FIT file on the Edge "530" for my last ride and I can see no "Zeros" in the temp series under Raw Data.
But when I look at the Raw Data in Golden Cheetah, I see there is a few groups of "Zeroes" in the Raw Data and it appears that this is happening when I have to stop at a road junction etc
And when I check again on the Edge 530, during these time periods when I am stopped, nothing has been recorded for anything, including temperature and it all restarts when I start riding again so I get the impression GC is filling in these gaps with records.
I have a theory what might be causing it now I can see the problem, a good few months back, I tried to get GC to download weather information into my rides just after I rode "London Edinburgh London" and it was unsuccefull, but, I never deleted or removed what I had done as I was going to try and make it work, but I forgot about it. so I am going to delete everything and see what happens when I upload yesterdays ride again
I appear to have resolved the issue, Under "Automation and Processors", I removed my "Weather" module which did not work, but also under "Automation and Processors" cancelled "Fix Gaps in Recording" ,Which I think was the culprit as I see it says that it will insert "Zeroes" if the gap is longer than what has been set. But, I have it set at "90s" so nothing should be happening as one gap I looked at was only about 35 seconds and the temperature was filled with "Zeros"
When I reuploaded yesterdays ride with todays date, the "Min Temp" was displayed correctly as "46.4"
Anyway, thanks for the help. I now need to find a quick way to alter all the records that become corrupted but I will try and do it in "raw data" using "Find and Replace"