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Calibration Certificate <br />Certificate Number 2017012481 <br />Customer., <br />LSA Associates Inc <br />20 Executive Park <br />Irvine, CA 92614, United States <br />Model Number 2541 <br />Serial Number 7977 <br />Test Results Pass <br />Initial Condition AS RECEIVED same as shipped <br />Description 1/2 inch Microphone - FF - 200V <br />Procedure Number <br />Technician <br />Calibration Date <br />Calibration Due <br />Temperature <br />Humidity <br />Static Pressure <br />Evaluation Method Tested electrically using an electrostatic actuator. <br />Compliance Standards Compliant to Manufacturer Specifications. <br />D0001.8387 <br />Abraham Ortega <br />29 Nov 2017 <br />29 Nov 2018 <br />23.5 °C ± 0.01 °C <br />27.9 %RH ± 0.5 %RH <br />101.49 kPa ± 0.03 kPa <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 17025:2005. <br />Test points marked with a $ do not fall within this laboratory's scope of accreditation. <br />The quality system is registered to ISO 9001:2008. <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 <br />from the organization issuing this report. <br />Standards Used <br />Description <br />Cal Date <br />Cal Due <br />Cal Standard <br />Larson Davis Model 2900 Real Time Analyzer <br />07/17/2017 <br />07/17/2018 <br />001230 <br />Microphone Calibration System <br />08/30/2017 <br />08/30/2018 <br />001233 <br />1/2" Preamplifier <br />12/15/2016 <br />12/15/2017 <br />001274 <br />Agilent 34401A DMM <br />12/06/2016 <br />12/06/2017 <br />001329 <br />Larson Davis CAL250 Acoustic Calibrator <br />01/04/2017 <br />01/04/2018 <br />003030 <br />1/2" Preamplifier <br />04/12/2017 <br />04/12/2018 <br />006506 <br />Larson Davis 1/2" Preamplifier 7-pin LEMO <br />09/12/2017 <br />09/12/2018 <br />006507 <br />1/2 inch Microphone - RI - 200V <br />04/24/2017 <br />04/24/2018 <br />006510 <br />1/2 inch Microphone - RI - 200V <br />08/09/2017 <br />08/09/2018 <br />006519 <br />Larson Davis 1/2" Preamplifier 7-pin LEMO <br />09/12/2017 <br />09/12/2018 <br />006530 <br />Larson Davis 1/2" Preamplifier 7-pin LEMO <br />08/11/2017 <br />08/11/2018 <br />006531 <br />Larson Davis, a division of PCB Piezotronics, Inc <br />1681 West 820 North <br />`�� •r,"' <br />®LAR50N DAV/5 <br />Provo, UT 84601, United States <br />,\ <br />o_ <br />-,; <br />A PCB PIEZOTRONICS DIV. <br />716-684-0001 <br />�\ <br />!„1, <br />ACCREDITED <br />Cert.#3622.01 <br />11/29/2017 5:59:53PM <br />Page <br />l of 4 <br />D0001.8415 Rev A <br />