... IEC 61672 Class 1 2.Accurate testing results 3.RS-232 interface ouput are ... from -15 °C to 50 °CComplies with IEC 61672 Class 1 USESWidely use in Industrial Noise Surveys ; machinery, vehicles, ships and ... ,C, Z; Y is F, S, I; N can be 1—99) SEL, Lex,8h, Lavg, TWA, DOSE, E, SD, LXpeakStatisticalAnalysisFunctionNOOptionalYESOver ... ~ 50 °C AWA 5661 Precision Impulse Sound Level Meter Class 1