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Summary of Contents for Larson Davis CAL150
- Page 1 CAL150 Precision Acoustic Calibrator Manual...
- Page 3 Larson Davis CAL150 Manual I150.01 Rev E...
- Page 4 Copyright Copyright 2006-2015 by PCB Piezotronics, Inc. This manual is copyrighted, with all rights reserved. The manual may not be copied in whole or in part for any use without prior written consent of PCB Piezotronics, Inc. Trademarks ® is a registered trademark of PCB, Inc. Disclaimer The following paragraph does not apply in any state or country where such statements are not agreeable with local law:...
- Page 5 This chapter describes the features and accessories of the Larson Davis CAL150 Sound Level Calibrator. Features The Larson Davis CAL150 Sound Level Calibrator is a battery-operated precision microphone calibrator used for the calibration of sound level meters and other sound measurement equipment.
- Page 6 CAL150 Technical Reference Manual Features...
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Page 7: Installing The Battery
Selecting the Output Level The output level is user-selected to be 94.0 or 114.0 dB using the slide selector on the side of the CAL150. Slide the switch to lower position for 114.0 dB or to the upper CAL150 Technical Reference Manual... - Page 8 If the calibrator and instrument are near room temperature °C) and near sea level (101.3 kPa) then no other corrections need to be made. If the calibration sheet for the CAL150 indicates 113.98 dB for its level when set up to 114 dB then set the Cal Level in the instrument to 113.86 dB and 1 kHz.
- Page 9 Step 3 Insert the microphone fully into the adapter. Make microphone. sure it fits snugly. The preferred method for calibrating with the CAL150 is to mount the Top: calibrator stands preamplifier in a fixed, vertical vertically above mounted position.
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Page 10: Calibration History
Systematic drifts are possible, and these should be recorded for corrective action. Most Larson Davis sound level meters keep a history of each calibration change that can be printed before an overall reset. Please refer to the respective instrument manuals for details. -
Page 11: Environmental Precautions
• The temperature of the CAL150 should be stable. If the temperature changes suddenly, provide a stabilization time of at least 15 minutes. This will ensure that the temperature compensation sensors are at the same temperature as the rest of the unit. - Page 12 • For several calibrators and several instruments, one calibration a year is recommended. If the CAL150 is being used to calibrate several instruments, then the history of calibration adjustments can usually pinpoint which instrument is drifting. If all the measurement instruments are drifting in the same direction by an amount you consider significant, the CAL150 should be recertified.
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Page 13: Standards Met
± 0.1 dB after 2 seconds Minimum stabilizing time after the 10 seconds microphone and calibrator are coupled together Static pressure range 65 kPa to 108 kPa, SPL variation will be < ± 0.4 dB CAL150 Technical Reference Manual Specifications... - Page 14 Utilize a 1/2” precision condenser microphone (WS2P) in conjunction with other traceable measuring instruments to establish traceability of the output level and frequency of the Model CAL150 CE-mark indicates compliance with EMC directive Note: The reference orientation for testing the effects of...
- Page 15 1/4” WS3P, WS3F and WS3D microphones with ADP024 adaptor According to IEC 61094-1;2000 1/2” LS2P; no adaptor required Other Microphones 3/8” with ADP031 adaptor 4180 Microphone The CAL150 level correction is +0.26 dB Technical Specifications CAL150 Technical Reference Manual...
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Page 16: Ce Mark Declaration Of Conformity
Directive(s) and Standard(s). Signature: Name: Kenneth J. Gonyea Jr. Title: V.P. Manufacturing 9001 PCB Piezotronics, Inc. Plione: 716-684-0001 FAX: 716-684-0987 PS078(E) 03/13/2015 Depew, NY FIGURE A-1 CE Mark Declaration of Conformity Technical Specifications CAL150 Technical Reference Manual...
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