... control of diesel engine. 2, Approved by ISO9001:200 Electronic Motor Speed Controller SY-SC-20321,General desciption2032 Speed ... will achieve a satisfactory air gap. The magnetic speed sensor voltage should be at least 1VAC RMS during cranking. ... control system, e.g. engine controller, water pre-heater, automatic voltage regulator, generator synchronizer, genset controller, power factor regulator, ...