Diesel Timming Tacho Tester The DF-7712 is designed to measure injection timing of diesel engine and is the first device which is developed as the most eliable timing tachotester in the world.Engine Applicability 2 cycle and 4 cycle diesel engine.Measure Range Engine Revolution :120~9,990 RPM (Min. RPM changes in 10 RPM increments.) Diesel Tacho Tester Measure Range 0~1,500 r.p.m 0~6,000 r.p.m (Accurancy within ±3% of full scale) Applicable Engine 4 Cycle diesel engine