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fast1075 · January 22nd, 2015, 06:15 PM

When you "0" a low scale refrigeration gauge, You are adjusting it to standard PSIG (pounds per square inch gauge). This accounts for the more or less 14.7 PSIA (pounds per square in absolute) as differential between the pressure inside the tire and the pressure outside the tire since the pressure reacts equally against the tire and the surface of the bourdon tube.

A low range refrigeration gauge is highly accurate and must be so to be used to figure temperature/pressure differentials in refrigeration. I periodically have mine checked for accuracy against a known standard pressure.

To sum it up. If it zeros, and is repeatable, the discrimination is less than 1 psig to mid scale. Well within tire pressure range.

January 22nd, 2015, 06:15 PM	#41
fast1075 ninjette.org guru Name: harry Location: Central Florida Join Date: Sep 2013 Motorcycle(s): 2006 Ninja 250, 2004 Buell XB12s, Honda 110 Elite Posts: 332	Calibration When you "0" a low scale refrigeration gauge, You are adjusting it to standard PSIG (pounds per square inch gauge). This accounts for the more or less 14.7 PSIA (pounds per square in absolute) as differential between the pressure inside the tire and the pressure outside the tire since the pressure reacts equally against the tire and the surface of the bourdon tube. A low range refrigeration gauge is highly accurate and must be so to be used to figure temperature/pressure differentials in refrigeration. I periodically have mine checked for accuracy against a known standard pressure. To sum it up. If it zeros, and is repeatable, the discrimination is less than 1 psig to mid scale. Well within tire pressure range. __________________________________________________ "They don't pay me enough to ride this thing!" Kenny Roberts after winning the Indy Mile on the TZ750 powered Grand National bike.