SAE J678 Speedometers and Tachometers-Automotive
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Product Code:SAE J678
Title:Speedometers and Tachometers-Automotive
Issuing Committee:Odometer And Speedometer Standards
Scope: This SAE Recommended Practice applies to speedometers, odometers, and speedometer drives typical of passenger vehicles, buses, and trucks used for personal or commercial purposes. The method of determining wheel revolutions per unit distance and overall system design variation are applicable to passenger cars only. Comparable recommendations for trucks and buses are under development. The data of tachometers is applicable to vehicular use, as previously described, and also to stationary and marine engines and special vehicles.
Title:Speedometers and Tachometers-Automotive
Issuing Committee:Odometer And Speedometer Standards
Scope: This SAE Recommended Practice applies to speedometers, odometers, and speedometer drives typical of passenger vehicles, buses, and trucks used for personal or commercial purposes. The method of determining wheel revolutions per unit distance and overall system design variation are applicable to passenger cars only. Comparable recommendations for trucks and buses are under development. The data of tachometers is applicable to vehicular use, as previously described, and also to stationary and marine engines and special vehicles.
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