Cirrus Research optimus yellow User Manual
  1. Manuals
  2. Brands
  3. Cirrus Research Manuals
  4. Measuring Instruments
  5. optimus yellow
  6. User manual

Cirrus Research optimus yellow User Manual

Sound level meters
Hide thumbs
Table of Contents

Advertisement

Quick Links

User manual for
optimus sound level
meters

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the optimus yellow and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Cirrus Research optimus yellow

Summary of Contents for Cirrus Research optimus yellow

  • Page 1 User manual for optimus sound level meters...
  • Page 2 optimus sound level meter user manual Page 2...
  • Page 3 About this manual • The instructions in this user manual refer to the operation of Cirrus Research plc optimus sound level meters with version 2.4 or higher of the firmware. • The instruments described in this manual are the optimus yellow (CR:150 series), optimus red (CR:160 series), optimus green (CR:170 series) and optimus purple (CR:190 series).
  • Page 4 You must not modify text, images or illustrations in any way. The material must be acknowledged as Cirrus Research plc copyright and you must give the title of the source document/publication. Where any third party copyright material is identified you will need to obtain permission from the copyright holders concerned.

  • Page 5: Table Of Contents

    Acoustic Calibrator Information ....................40 Calibrating a Sound Level Meter......................40 Changing the Battery ......................... 41 Specifications ............................. 42 Technical Information ........................42 CE Certificate of Conformity ...................... 44 Warranty ........................... 45 Index ............................46 Cirrus Research Offices ......................47 Page 5...
  • Page 6 optimus sound level meter user manual Microphone Capsule Preamplifier Preamplifier Locking Ring Ambient Light Sensor Leq View LAeq,1s dB Display LC Peak 89.3dB 3.5dB Short LAeq LCPeak 1 of 3 07/01/10 09:43:21 Start Menu Calibrate Soft Keys Control Keys Page 6...
  • Page 7 optimus sound level meter user manual Battery Cover Retaining Screw On/Off Button Battery Cover Tripod Mount Page 7...

  • Page 8: Introduction

    Introduction Welcome to your optimus sound level meter. This next-generation instrument from Cirrus Research plc is powerful yet simple to use, and is capable of a wide range of noise measurement functions. The advanced technology used in the optimus...
  • Page 9 optimus sound level meter user manual This allows you to record notes and information before a measurement by simply speaking into the microphone, then play them back later in the NoiseTools software. You can save time when making measurements, and remove the need to carry a notepad and store any important information about your measurements A single measurement range By using the very latest in digital technology combined with 40 years’...

  • Page 10: First Use

    optimus sound level meter user manual First Use Your optimus sound level meter has been shipped in reusable packaging that should be retained for safe shipment when returning the instrument for calibration or servicing. All optimus meters come with the following standard accessories: •...
  • Page 11 optimus sound level meter user manual To connect or remove the preamplifier, please follow the diagram: Page 11...

  • Page 12: Inserting The Batteries

    optimus sound level meter user manual Inserting the batteries Your optimus is powered by 4 x AA batteries (also called MN1500 or LR6). We recommend that you use alkaline or lithium batteries to give the best performance. Remove the battery cover by loosening the captive locking screw (as shown below). Battery Cover Retaining Screw Battery Polarity Indicators...

  • Page 13: Calibration

    optimus sound level meter user manual The instrument is switched on by pressing and releasing the power button on the left hand side of the case. After the boot screen, your optimus will display the last View you used. Calibration All noise measuring instruments should be calibrated before each use, because the microphone is susceptible to minor damage from even small knocks.
  • Page 14 When the calibration is completed, the optimus will display the level along with the correction or adjustment made. The optimus is preset with the correction values needed for Cirrus Research microphone capsules, so no manual adjustment is required. The calibration level you should expect is 93.7dB.

  • Page 15: Making A Measurement

    optimus sound level meter user manual Making a measurement Press the Start key to begin recording (on data logging intruments with the VoiceTag function switched on, the VoiceTag screen will show – press skip to move on without recording a note). Your optimus is now measuring and recording noise data for all available functions, regardless of your selected View, and the red animated Running icon will show in the top left of the information bar.

  • Page 16: Operations In More Detail

    If you are unsure which capabilities your optimus has, you can check on the instrument by looking at the General View / page 5 (and 6 on some models), or look at the Features Matrix available on the Cirrus Research website: www.cirrusresearch.co.uk/optimus/library...

  • Page 17: Connectors

    optimus sound level meter user manual Connectors The connectors used by the optimus to communicate with a PC and NoiseTools are at the bottom of the instrument under a protective cover. Open by pulling this edge Protective Cover 3.5mm Socket AC Output Multi I/O Interface Connector RS232 &...

  • Page 18: Screen Saver

    optimus sound level meter user manual An AC output is available on the optimus via the 3.5mm jack socket. The output is un- weighted and the output level can be adjusted using the options in the AC Out menu. This output can be used with external instrumentation. See page 37 for details of the electrical outputs.
  • Page 19 Under rare circumstances, when the optimus encounters a condition it cannot recover from, a ‘bluescreen’ error message will show with an error code. If this should happen to your optimus, please make a note of the code so the engineers at Cirrus Research Page 19...

  • Page 20: Audio Recording

    Menu (Standard or Studio). Details of the Audio Triggers can be found in Technical Note 28 - Audio Recording with the optimus green sound level meters. Please refer to the Cirrus Research plc website at www.cirrusresearch.co.uk/library/optimus. Pressing the audio key again stops the recording. There is no maximum duration of an audio recording set by default, but it can be changed in NoiseTools, and the parameters for the Audio Triggers can be configured in NoiseTools.

  • Page 21: Timers

    optimus sound level meter user manual Timers The single and repeat timers allow you to make precisely timed measurements over pre-set or custom defined durations, which are set on the instrument using the Storage Options Menu (see next chapter). The repeat timer allows measurements to be stopped and started automatically over a long period of time.

  • Page 22: Memory

    optimus sound level meter user manual The duration of the Back Erase can be set to between 1 and 30 seconds using the menu and can also be configured in the NoiseTools software. If the Pause function is disabled, the Back Erase function is also disabled. Memory The optimus has a 4GB memory as standard.

  • Page 23: Getting To Know Your Optimus - Features And Capabilities

    To check which capabilities your optimus has, go to General View / page 5 (and 6 on some models). This will list all the available capabilities. Alternatively, a Feature Matrix is available on the Cirrus Research website, which lists all the capabilities for all optimus models.
  • Page 24 This is a capability on some instruments, displayed within the 1:3 octave view. Instruments with Tone Detection use either the ISO 1996-2:2007 Simplified Method or an improved method developed by Cirrus Research which is based upon the ISO standard, extended to include tones between bands, tones in outer bands and Z- weighting.

  • Page 25: High Level Noise Measurement

    For more information, please see Technical Note 32 - Tonal noise detection with the optimus sound level meters available for download from the Cirrus Research website at www.cirrusresearch.co.uk/library/optimus. Ln View The Ln view shows the statistical Ln values calculated during the measurement. The first seven Ln values are set by default to commonly used values and 8-14 are definable in NoiseTools.

  • Page 26: Menus

    optimus sound level meter user manual This consists of a microphone capsule, attenuator and preamplifier, supplied as a complete unit. Switch off the instrument before fitting the MV:200EH. Once the unit is fitted, calibrate the sound level meter as standard. The optimus will detect the MV:200EH and adjust the measurement span to 50-170dB.
  • Page 27 optimus sound level meter user manual Advanced options: Restore Factory Settings Restores the instrument back to its original factory setup. AC Out On/Off +20dB Gain High Levels (70-140dB) or Low Levels (20-90dB) Audio Quality Standard Quality (16bit, 16kHz) Studio Quality (32bit, 96kHz) Audio Triggers On/Off Default (75dB LAeq, No minimum time) –...
  • Page 28 optimus sound level meter user manual Storage options: Time History Rate 2s, 1s (default), ½sec (500ms), ¼sec (250ms), 1/8sec (125ms) 1/16sec (62.5ms), 1/100sec (10ms) VoiceTag On/Off Single Timer On/Off 1min, 2min, 5min, 10min, 15min, 30min, 1hr, Custom (default 10min) Repeat Timer On/Off 1min, 2min, 5min, 10min, 15min, 30min, 1hr, Custom (default 10min) Day/Evening/Night...

  • Page 29: Additional Information

    • Technical Note 30 - Project Exposure Calculation • Technical Note 31 - NR & NC Curves Other documents may also be available for the optimus sound level meters. Please visit the Cirrus Research website for the latest information. Page 29...

  • Page 30: Appendices

    Cirrus Research plc website. Visit www.cirrusresearch.co.uk/library/optimus to download the latest information. This chapter of the manual contains the overall specifications for the optimus yellow (CR:150), optimus red (CR:160), optimus green (CR:170) and optimus purple (CR:190) sound level meters. Common Specifications...
  • Page 31 optimus sound level meter user manual Microphone Preamplifier: MV:200 Removable Preamplifier for Class 1 & Class 2 instruments Total Measurement Range: 20dB to 140dB RMS Single Range Noise Floor: <18dB(A) Class 1, <21dB(A) Class 2 Frequency Weightings: RMS: A, C, & Z Measured Simultaneously Peak: A, C, &...

  • Page 32: Views

    optimus sound level meter user manual Views Sound Level View • Sound Level: Lxy, x=A ,C ,Z; y= F, S, I • Maximum Sound Level: LxyMax where x=A ,C ,Z; y= F, S, I • Minimum Sound Level: LxyMin where x=A ,C ,Z; y= F, S, I •...
  • Page 33 optimus sound level meter user manual • Graphical display of cumulative LAeq for each band • Numeric display of Leq, 1s real time bands (updated every 1 second) • Numeric display of cumulative Leq and LAeq for each band • LeqLF and LAeqLF (20Hz to 200Hz) •...
  • Page 34 optimus sound level meter user manual Moving Average View • Page 1 • LAeq,15min o Indicated in Red where LAeq,15min > 95dB, o Indicated in Yellow where LAeq,15min > 85 dB o Indicated in White where LAeq,15min < 85dB • LASMax •...

  • Page 35: Stored Measurements

    optimus sound level meter user manual Stored Measurements Sound Level View • Overall: LxyMax where x = A, C, Z; y = F, S, I (9 items). • Time History: LxyMax where x = A, C; y = F, S,I (6 items). •...
  • Page 36 optimus sound level meter user manual 1:3 Octave Band View • Overall Leq for each octave band 36 items for 6.3Hz to 20kHz • Overall LAeq for each octave band 36 items for 6.3Hz to 20kHz • Leq,LF & LAeq,LF (20Hz to 200Hz) •...

  • Page 37: Electrical Outputs

    optimus sound level meter user manual Menu / Quick Settings The Quick Settings available are: UK: 3dB, No Threshold, No Time Weighting, Criterion Level of 85dB EU: 3dB, No Threshold, No Time Weighting, Criterion Level of 85dB OSHA HC & PEL Integrator 2: 5dB, 80dB Threshold, Slow Time Weighting, 90dB Criterion Level Integrator 3: 5dB, 90dB Threshold, Slow Time Weighting, 90dB Criterion Level OSHA HC &...
  • Page 38 DC Output Cables The DC Output is available using a ZL:174 Output Cable. This cable is available from Cirrus Research plc or your local distributor. Do not use any other cable with the optimus. This may damage the instrument and invalidate your warranty.
  • Page 39 optimus sound level meter user manual Microphone Extension Cables • ZL:202 - 2m Microphone Extension Cable • ZL:205 - 5m Microphone Extension Cable • ZL:210 - 10m Microphone Extension Cable • ZL:215 - 15m Microphone Extension Cable • ZL:220 - 20m Microphone Extension Cable •...

  • Page 40: Acoustic Calibrator Information

    Acoustic Calibrator Information This chapter refers to the use of a Cirrus Research plc CR:514 or CR:515 Acoustic Calibrator. Switching on the Calibrator Press the Power Button on the end of the Calibrator to switch the unit on. The Indicator will illuminate to show that the unit is operating.

  • Page 41: Changing The Battery

    optimus sound level meter user manual The microphone should be parallel to the body of the calibrator. Also ensure that the small bleed-hole next to the microphone cavity is not blocked as this could cause damage to the microphone. Your optimus sound level meter will automatically make adjustments for the level produced by the acoustic calibrator and the microphone type fitted to the instrument.

  • Page 42: Specifications

    optimus sound level meter user manual Unscrew the screw holding the battery cover on, using a coin or the keyring provided The battery, type 6F22 (PP3) can now be eased out of its holder and replaced. The battery should be eased out terminal side first by pushing against the spring at the other end.
  • Page 43 The correction is typically -0.3dB for ½ inch microphones (making the effective calibration level 93.7dB). Calibration corrections are listed below for the Cirrus Research plc ½” Capsules and three microphone capsules commonly used in Calibration Laboratories: Microphone Correction Values...

  • Page 44: Ce Certificate Of Conformity

    CE Certificate of Conformity Cirrus Research plc Hunmanby UK Equipment Description The following equipment manufactured after 1st January 2012: CR:151 Sound Level Meter (A & B Versions) CR:152 Sound Level Meter (A & B Versions) CR:161 Sound Level Meter (A, B, C &...

  • Page 45: Warranty

    15. In the event of any dispute on the terms of the warranty Cirrus Research plc will accept pendulum arbitration by the United Kingdom Institute of Acoustics Ltd.

  • Page 46: Index

    optimus sound level meter user manual Index 1:1 Octave Band ...24 Frequency Weightings .. 31 OSHA ......37 1:3 Octave Band ..24, 36 High Level Noise OSHA HC ....... 28 AC Out......27 Measurement ... 25 Overload ....... 19 AC Output .....37 HML ......

  • Page 47: Cirrus Research Offices

    optimus sound level meter user manual Page 47...

This manual is also suitable for:

Optimus redOptimus greenOptimus purpleCr 151Cr 152Cr 162 ... Show all

Table of Contents