Since no one else has replied, I’ll have a go. I think it would be best to find out from Internet sources about how much water your maple tree requires per week. I got this from the Colorado State Forest Service:
Using that as a basis (you might want to search for additional information), your tree requires around 40 gallons of water a week. They don’t say if that’s summer, spring or fall, but it’s better than nothing I guess.
Your drip zone should be all around the tree, out to the drip zone if possible (although in my experience, that usually takes it into another “zone” of irrigation, into grass or shrubs). I’d run the drip zone on your tree for an hour, and measure the gallons of water applied by reading your water meter before and after. Divide 40 by the gallons applied and that will give you the hours to water. If 1 hour applies 10 gallons, you’d water for 40/10 = 4 hours.
Hope this helps.