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Cirrus Research CR308 Handbook

Sound level meters
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Instrument
Handbook
CR308/310 Sound
Level Meters

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Summary of Contents for Cirrus Research CR308

  • Page 1 Instrument Handbook CR308/310 Sound Level Meters...

  • Page 2: Table Of Contents

    Contents The contents of this manual, including any illustrations, technical informaiton and descriptions, were correct at the time of printing. Cirrus Research plc reserves the right to make any changes necessary, without notice, in line with the policy of continuing 1.

  • Page 3: Overview

    CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Overview Welcome to your new CR:308/310 series sound level meter. You’ve taken a great step towards protecting people’s hearing and this entry level meter will make it quick and easy for you to take simple noise measurements, providing you with the basic data you need.
  • Page 4 CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook AC/DC out Serial connector for printer* USB power input Serial number label *Printer functionality only available on the CR:310 model. Tripod mount Battery compartment...

  • Page 5: Display Interface

    CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Display interface CR:308 & CR:310 main display CR:308 alarm set display (press ) - see page 12 Threshold level set Measurement indicator Under-range indicator Overload indicator Alarm level...

  • Page 6: Keypad Interface

    CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Keypad interface Instrument operation CR:308 keypad Fit new batteries by sliding the battery cover open and inserting two AA batteries in the correct orientation.

  • Page 7: Setting The Level Alarm (Cr:308)

    CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Setting the level alarm (CR:308) Performing and printing a measurement (CR:310) The level alarm function can be used to trigger an alert if the noise level exceeds a Press to start or stop a measurement.

  • Page 8: Calibrating The Meter

    Before making a measurement, it is important that you calibrate your instrument with Standards: IEC 61672-1:2013 Class 2 an acoustic calibrator, such as the Cirrus Research CR:514 1kHz 94dB calibrator. Measurement range: 30dB (A)~130dB (A) To start the process of calibration, ensure the microphone is fitted correctly and place 40dB (C)~130dB (C) the acoustic calibrator over the microphone.

  • Page 9: Reference Information For Periodic Testing

    CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Reference Information for Periodic Testing Storage Temperature: -20°C to +60°C Dimensions: 215mm×68mm×32 mm Reference level (1kHz) 94dB Weight: 220g (including battery) Reference level (8kHz) 92.9dB (A) Electrical Outputs: AC (tip 3.5mm jack) and DC (middle...
  • Page 10 CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Free field correction for HY205 microphone. Directionality plots and case reflection plots Frequency / kHz Free field Frequency / kHz Free field correction / dB correction / dB 1.25...

  • Page 11: Options And Accessories

    CR:308 & CR:310 sound level meters - instrument handbook CR:308 & CR:310 sound level meters - instrument handbook Options and accessories Serial connection The following table contains information about the model options and accessories DB9, RS232 communication rate at 9600 Baud. available with this sound level meter.

  • Page 12: Appendix A - Ce Declaration Of Conformity

    CR:308 sound level meter 3. Warranty extension CR:310 sound level meter If the product is returned to Cirrus Research plc or one of its Authorised Service & Along with their standard accessories. Calibration Centres for routine verification & calibration after the initial guarantee...
  • Page 13 7. The user shall be responsible for determining if the product is suitable for the use and that such use complies with any applicable laws, regulations or standards. 8. The customer must notify Cirrus Research plc in writing of any claimed defect in the product immediately upon discovering it.

  • Page 14: 14 Cirrus Research Offices

    CR:308 & CR:310 sound level meters - instrument handbook 14 Cirrus Research offices The addresses given below are the Cirrus Research plc offices. Cirrus Research plc also have approved distributors and agents in many countries worldwide. For details of your local representative, please contact Cirrus Research plc using the information below.
  • Page 15 sales@cirrusresearch.co.uk...

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Cr310

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