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Certificate Number 2017004790 <br />Pattern approval for IEC 61672-1:2013 / ANSI/ASA S1.4-2014/Part 1 successfully completed by Physikalisch-Technische Bundesanstalt <br />(PTB) on 2016-02-24 certificate number DE-15-M-PTB-0056. <br />The sound level meter submitted for testing successfully completed the periodic tests of IEC 61672-3:2013 / ANSI/ASA S1.4-2014/Part <br />3, for the environmental conditions under which the tests were performed. As evidence was publicly available, from an independent <br />testing organization responsible for approving the results of pattern -evaluation tests performed in accordance with IEC 61672-2:2013 / <br />ANSI/ASA S1.4-2014/Part 2, to demonstrate that the model of sound level meter fully conformed to the class 1 specifications in IEC <br />61672-1:2013 / ANSI/ASA S1.4-2014/Part 1; the sound level meter submitted for testing conforms to the class 1specifications in IEC <br />61672-1:2013 / ANSI/ASA S1.4-2014/Part 1. <br />Standards Used <br />Description Cal Date Cal Due Cal Standard <br />SRS DS360 Ultra Low Distortion Generator 2017-01-19 2018-01-19 006239 <br />Hart Scientific 2626-S Humidity/Temperature Sensor 2016-06-17 2017-06-17 006946 <br />Larson Davis, a division of PCB Piezotronics, Inc <br />1681 West 820 North <br />Provo, UT 84601, United States <br />716-684-0001 <br />ACCREDITED <br />6d,A1W <br />Cert.#3622.01 <br />10LAR50N DAV15 <br />A PCB PIEZOTRONICS DIV. <br />2017-5-9T12:09:20 Page 2 of 24 D0001.8407 Rev B <br />