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Hi. i need your advised about hour meter. how is the term if on hour meter are equal with one hour solar system? especially with engine. is it really related with idle RPM? how is the standard to get equal with one hour solar system? Many Thank's for your kindness. Regards, Effendy
"i want to count on how many hours the tractor has been run."
What tractor? You never mentioned any tractors before! Is it a solar-powered tractor?!
Anyhow, counting "how many hours the tractor has been run" is simple, isn't it? You just need to detect whenever the tractor is running and, whenever it is running, you increment your time count at a suitable rate.
You will, of course, need some sort of long-term storage to keep hold of the count...
"is it related with the engine speed (radian per minutes)."
The engine is either running, or it isn't.
However, if you want to record additional details - like engine speed, load etc - it's up to you to decide what you want to record!
I'd brand this thread like this:
"the cosmic connection"
:-)