Equation 1. Test Set: Scale Reading * Length = Resistance-Length
75,000 ohms * 3 miles = 225,000 ohm-mile
(75,000 ohms * 4.9 km = 367,000 ohm-km)
Equation 2. 100,000 ohm-mile ÷ Length = Minimum Acceptable Meter Scale Reading
100,000 ohm-mile ÷ 3 miles = 33,333 ohms
(161,000 ohm-km ÷ 4.9 km = 32,857 ohms)
7 C.F.R. §1755.406