Larson Davis CAL200 Manual
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Larson Davis CAL200 Manual

Precision acoustic calibrator
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CAL200
Precision Acoustic Calibrator
Manual

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Summary of Contents for Larson Davis CAL200

  • Page 1 CAL200 Precision Acoustic Calibrator Manual...
  • Page 3 A P P E N D I X Larson Davis CAL200 Manual I200.1 Rev H...
  • 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 of the Larson Davis CAL200 Sound Level Calibrator. Features The Larson Davis CAL200 sound level calibrator is a battery operated, precision instrument used for calibrating sound level meters and other sound measurement equipment. It provides an output level of either 94.0 or 114.0 dB (switch-selectable) at a frequency of 1 kHz.
  • Page 6 Features CAL200 Technical Reference Manual...

  • Page 7: Installing The Battery

    This chapter describes how to operate the CAL200 calibrator. Installing the Battery The CAL200 uses a nine-volt battery and it is recommended that you use an alkaline battery to extend the running time of your calibrator. The CAL200 will run for approximately 100 hours on one nine-volt battery when using the 114 dB output level.
  • Page 8 Select 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 CAL200. Slide the switch to lower position for 114.0 dB or to the upper position for 94.0 dB, as indicated by the label on the lower left of the front panel.
  • Page 9 FIGURE 2-1 Vertical Positioning Step 4 With the microphone connected to the instrument being calibrated, press the CAL200’s ON button. With a fresh battery, the calibrator will issue a tone for more than 60 seconds before automatically shutting off (see note below).

  • Page 10: Calibration History

    Step 6 Check the ambient noise level to insure that the calibration was not influenced by noise from external sources. The CAL200 needs to be on the microphone but with the CAL200 signal off. External noise levels lower than 89 dB SPL for the 114 dB level calibration, and 69 dB SPL for the 94 dB calibration level will influence the calibration by less than 0.015 dB.

  • Page 11: Calibrator Calibration

    • The temperature of the CAL200 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 If the CAL200 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 CAL200 should be recertified.

  • Page 13: Standards Met

    -0.12 dB for 1/2” free-field microphones, including 377B02 and other WS2F-compliant free-field microphones Frequency 1 kHz ± 1% Total Harmonic distortion < 2% Minimum stabilizing time after the 10 seconds microphone and the calibrator are coupled together Specifications CAL200 Manua...
  • Page 14 Utilize a 1/2” IEC 61094-4 (WS2P) microphone in conjunction with other traceable measuring instruments to establish traceability of the output level and frequency of the Model CAL200 CE-mark indicates compliance with EMC directive. Note: The reference orientation for testing the effects of...

  • Page 15: Microphone Types

    1/2” WS2P, WS2F and WS2D microphones; no adaptor required. 1/4” WS3P, WS3F and WS3D microphones with ADP024 adaptor. According to IEC 61094-1:2000 1/2” LS2P Other Microphones 3/8” with ADP031 adaptor 4180 Microphone The CAL200 level correction is +0.26 dB Technical Specifications CAL200 Technical Reference Manual...

  • Page 16: Ce Mark Declaration Of Conformity

    .HQQHWK - *RQ\HD -U 7LWOH 93 0DQXIDFWXULQJ  ,62  &HUWLILHG  3&% 3LH]RWURQLFV ,QF 3KRQH  )$;  36 5(9 '  'HSHZ 1<  RI  FIGURE A-1 Declaration of Conformity CE Mark Declaration of Conformity CAL200 Manual...

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