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Certificate Number 2017004807 <br />1 /2" adaptor is used with the preamplifier. <br />Calibration Check Frequency: 1000 Hz; Reference Sound Pressure Level: 114 dB re 20 NPa; Reference Range: 0 dB gain <br />Periodic tests were performed in accordance with precedures from IEC 61672-3:2013 / ANSI/ASA S1.4-2014/Part3. <br />Pattern approval for IEC 61672-1:2013 / ANSI/ASA S1.4-2014/Part 1 successfully completed by Physikalisch-Technische <br />Bundesanstalt (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 2016-06-21 2017-06-21 006311 <br />Hart Scientific 2626-S Humidity/Temperature Sensor 2016-06-17 2017-06-17 006946 <br />Larson Davis CAL200 Acoustic Calibrator 2016-07-26 2017-07-26 007027 <br />Larson Davis Model 831 2017-03-01 2018-03-01 007182 <br />PCB 377A13 1/2 inch Prepolarized Pressure Microphone 2017-03-08 2018-03-08 007185 <br />Larson Davis CAL291 Residual Intensity Calibrator 2016-09-22 2017-09-22 007287 <br />Acoustic Calibration <br />Measured according to IEC 61672-3:2013 10 and ANSI S1.4-2014 Part 3: 10 <br />Measurement Test Result [dB] Lower Limit [dB] Upper Limit [dBJ Expanded Result <br />Uncertainty [dBJ <br />1000 Hz 114.01 113.80 114.20 0.14 Pass <br />As Received Level: 114.13 <br />Adjusted Level: 114.01 <br />-- End of measurement results -- <br />Acoustic Signal Tests, C-weighting <br />Measured according to IEC 61672-3:2013 12 and ANSI S1.4-2014 Part 3: 12 using a comparison coupler with Unit Under Test <br />(UUT) and reference SLM using slow time -weighted sound level for compliance to IEC 61672-1:2013 5.5; ANSI S1.4-2014 Part <br />1: 5.5 <br />Frequency [Hz] Test Result [dB] Expected [dBJ Lower Limit [dBJ Upper Limit [dBJ Expanded Result <br />Uncertainty [dBJ <br />125 0.02 -0.20 -1.20 0.80 0.23 Pass <br />1000 0.08 0.00 -0.70 0.70 0.23 Pass <br />8000 -4.90 -3.00 -5.50 -1.50 0.32 Pass <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 />-- End of measurement results -- <br />Cert.#3622.01 <br />®LARSONDAVIS <br />A PCB PIEZOTRONICS DIV. <br />2017-5-9T14:42:42 Page 2 of 3 D0001.8406 Rev B <br />