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hƭŷƉƚƭŷ /ƚƩƦƚƩğƷźƚƓ /ƌğƭƭźŅźĭğƷźƚƓ Ώ wĻƭƷƩźĭƷĻķ <br /> <br />Defrosting <br />Defroster testing was performed in accordance with SAE J381Windshield Defrosting Systems <br />Test Procedure and Performance Requirements-Trucks, Buses, and Multipurpose Vehicles. <br /> <br />This SAE Recommended Practice establishes uniform test procedures and performance <br />requirements for the defrosting system of enclosed cab trucks, buses, and multipurpose <br />vehicles. Current engineering practice prescribes that for laboratory evaluation of defroster <br />systems, an ice coating of known thickness be applied to the windshield and left- and right- <br />hand side windows to provide more uniform and repeatable test results, even though under <br />actual conditions such a coating would necessarily be scraped off before driving. The test <br />condition, therefore, represents a more severe condition than the actual condition, where the <br />defroster system must merely be capable of maintaining a cleared viewing area. <br /> <br />During the test, the vehicle is cold soaked to 0º F in a cold chamber. A prescribed layer of ice <br />is applied to the windshield. The defroster is then run, and the advancing melt boundary <br />marked as the test proceeds. <br /> <br />The SAE prescribed area of the windshield was 100% cleared and the side windows were <br />75% cleared within the specified 30-minute period. <br /> <br />Defrost Results <br /> <br /> <br /> Start of Test 15 Minutes 30 Minutes <br /> <br /> Right Viewed From Outside Left <br /> <br /> <br /> <br />CD0167 Saber FR - Enforcer Air Conditioning_Defrost 290420.doc 2 4/28/2020 <br /> <br />