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Calibration Certificate <br />Certificate Number 2021011961 <br />Customer: <br />�SI �ngineering Inc <br />Suite 218 <br />7831 Glenroy Road <br />A�Iinncapolis,vIN 55439,United States <br />Model Number CAL200 <br />Serial Number 18322 <br />Test Resu/ts Pass <br />Initial Condition AS RECEIVED same as shipped <br />Description Larson Davis CAL200 Acoustic Calibrator <br />Evaluafion Method <br />Compliance Standards <br />Procedure Number <br />Technician <br />Calibration Date <br />Calibration Due <br />Temperature <br />Humidity <br />Static Pressure <br />D0001.8386 <br />Scott Montgomery <br />24 Sep 2021 <br />24 Sep 2022 <br />25 °C ± 0.3 °C <br />31 %RH ± 3 %RH <br />101.2 kPa ± 1 kPa <br />The data is aquired by the insert voltage calibration method using the reference microphone's <br />open circuit sensitivity. Data reported in dB re 20 uPa. <br />Compliant to Manufacturer Specifications per D0001.8190 and the following standards: <br />IEC 60942:2017 ANSI S1.40-2006 <br />Issuing lab certifies that the instrument described above meets or exceeds all specifications as stated in the referenced procedure <br />(unless otherwise noted). It has been calibrated using measurement standards traceable to the SI through the National Institute of <br />Standards and Technology (NIST), or other national measurement institutes, and meets the requirements of ISO/IEC 17025:2017. <br />Test points marked with a$ in the uncertainties column do not fall within this laboratory's scope of accreditation. <br />The quality system is registered to ISO 9001:2015. <br />This calibration is a direct comparison of the unit under test to the listed reference standards and did not involve any sampling plans to <br />complete. No allowance has been made for the instability of the test device due to use, time, etc. Such allowances would be made by <br />the customer as needed. <br />The uncertainties were computed in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM). A <br />coverage factor of approximately 2 sigma (k=2) has been applied to the standard uncertainty to express the expanded uncertainty at <br />approximately 95% confidence level. <br />This report may not be reproduced, except in full, unless permission for the publication of an approved abstract is obtained in writing from <br />the organization issuing this report. <br />Description <br />Larson Davis Model 2900 Real Time Analyzer <br />Agilent 34401A DMM <br />Microphone Calibration System <br />1/2" Preamplifier <br />Larson Davis 1/2" Preamplifier 7-pin LEMO <br />1/2 inch Microphone - RI - 200V <br />Hart Scientific 2626-H Temperatwe Probe <br />Pressure Transducer <br />LARSON DAVIS - A PCB PIEZOTRONICS DIV <br />1681 West 820 North <br />Provo,UT 84601,United States <br />716-684-0001 <br />Standards L3sed <br />Cal Date <br />04/O 1 /2021 <br />03/02/2021 <br />02/24/2021 <br />08/26/2021 <br />08/09/2021 <br />09/23/2021 <br />02/04/2021 <br />06/28/2021 <br />Cal Due <br />04/01 /2022 <br />03/02/2022 <br />02/2d/2022 <br />08/26/2022 <br />08/09/2022 <br />09/23/2022 <br />08/04/2022 <br />06/28/2022 <br />�'`�`.%%'>. <br />: <br />. <br />.� ,�= :-: <br />���---.� ,�: <br />%i i� , �: 'ACCREDITED; <br />�'�rh�l�,n�` CP.n. � ^2P.L1 _ <br />Cal Standard <br />001051 <br />002588 <br />00544G <br />006506 <br />006507 <br />006511 <br />006767 <br />007310 <br />%�''�) � � I , / <br />, � ,�: � <br />9/24/2021 3:01:57PM Page 1 of 3 D0001.8410 Rev C <br />