Cirrus Research CR 151 User Manual Download Page 1

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User manual for

optimus sound level

meters

Summary of Contents for CR 151

Page 1: ...User manual for optimus sound level meters ...

Page 2: ...optimus sound level meter user manual Page 2 ...

Page 3: ...e indicated by The additional information required for testing in accordance with IEC 61672 is provided as a supplementary document Optimus Sound Level Meters Technical Data Part B which is available for download at www cirrusresearch co uk library optimus It is not possible to change the way that the instrument measures through the software or firmware Any legal metrology aspects of the instrumen...

Page 4: ...terial is identified you will need to obtain permission from the copyright holders concerned Trademarks Cirrus Research plc the Cirrus Research plc Logo doseBadge DOSEBADGE optimus the NoiseTools Logo and the Noise Hub Logo are either registered trademarks or trademarks of Cirrus Research plc in the United Kingdom and or other countries Microsoft and Windows are registered trademarks of Microsoft ...

Page 5: ...estore Factory Settings 22 Windshield 22 Getting to know your optimus features and capabilities 23 Views 23 High Level Noise Measurement 25 Menus 26 Additional Information 29 Appendices 30 IEC 61672 test data 30 Common Specifications 30 Views 32 Stored Measurements 35 Electrical Outputs 37 Acoustic Calibrator Information 40 Calibrating a Sound Level Meter 40 Changing the Battery 41 Specifications ...

Page 6: ...6 Start Calibrate 07 01 10 09 43 21 140 20 LAS Menu Leq View 1 of 3 LAeq 1s dB LC Peak 89 3dB C A 3 5dB Short LAeq LCPeak 140 20 60 100 Microphone Capsule Preamplifier Ambient Light Sensor Display Soft Keys Control Keys Preamplifier Locking Ring ...

Page 7: ...optimus sound level meter user manual Page 7 Battery Cover Retaining Screw Cirrus Research plc Battery Cover Tripod Mount On Off Button ...

Page 8: ...nts is to give you a sound level meter that is as simple to use as possible whilst providing the very highest level of performance and function You cannot forget to measure the right function as everything is measured at the same time For example if you ve chosen the Fast time weighting View Option the optimus will still measure Slow and Impulse at the same time You can choose another time weighti...

Page 9: ... OLED type This gives a clear bright display that is easy to read in all light conditions as well as allowing us to use colour to show specific functions and information All of the information that you need is shown clearly on the screen with the most useful function for example the Leq in the Leq View shown in large white text This makes it easy for you to see the information that is important at...

Page 10: ...ual Product CD with NoiseTools software and documentation Windshield You may have other accessories depending on your package Please check for damage or missing items before using your optimus All optimus instruments are shipped with the removable preamplifier separated from the body When connecting the preamplifier please take great care to only turn the locking ring at the base Twisting the prea...

Page 11: ...optimus sound level meter user manual Page 11 To connect or remove the preamplifier please follow the diagram ...

Page 12: ... give the best performance Remove the battery cover by loosening the captive locking screw as shown below Please look carefully at the diagram inside the battery compartment showing the correct polarity After inserting the batteries in the correct orientation replace the cover and tighten the locking screw Battery Cover Retaining Screw Battery Cover Battery Polarity Indicators Cirrus Research plc ...

Page 13: ...The calibration applies corrections if needed to ensure that your measurements are as accurate as possible Calibration should also be carried out at the end of a measurement session to make sure that nothing has happened to the instrument during the session To calibrate your optimus carefully push the microphone into the cavity at the end of the calibrator Ensure the microphone is fully inserted i...

Page 14: ...brator to determine if it is within the required tolerance and levels The calibration level must be stable to within 0 075dB for 5 consecutive seconds for the calibration to be successful 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...

Page 15: ...ll show in the top left of the information bar The measurement can be paused by pressing the Pause Stop soft key Press once to pause back erase and twice to stop or alternatively press and hold for three seconds to stop For Pause Back Erase see page 21 The Pause Back Erase function is only available if this has been enabled in the instrument menu To stop the measurement press the Stop key The inst...

Page 16: ...ls is also a powerful environment for storing analysing and organising your data and produces reports for publication VoiceTag notes and audio recordings can only be played back through NoiseTools Keypad and Controls The optimus is controlled via the four arrow keys up down left and right and three soft keys which change in function depending upon the mode that the instrument is in The soft key fu...

Page 17: ... Jack 2m or via ZL 176 optimus 12v Battery pack cable The optimus can also be powered from an external source such as a USB connection to a PC or via a USB power supply Protective Cover Open by pulling this edge USB Connector Multi I O Interface Connector RS232 DC Output 3 5mm Socket AC Output Wrist Strap Fastening Pin 140 Leq View LAeq 1s dB LC Peak 89 3dB C A 3 5dB 140 Leq View LAeq 1s dB LC P k...

Page 18: ...ow that the instrument is powered The screen dim and screen saver functions will occur during measurements as well as when not measuring Press any key to restore the display The time intervals for the screen dim and screen saver are configurable in NoiseTools Display The optimus uses a high resolution colour OLED screen to show a clear and easy to read display of all the information you need Audio...

Page 19: ...anguage on the display On the Sound Level View and Leq View the indicators are situated beneath and to the left of the large number When a measurement is not in progress the indicator is shown for at least 1 second so that very short transient overload or under range conditions are visible to the operator When a measurement is in progress the overload indicator stays on until the measurement is st...

Page 20: ...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 The audio recording includes a 10 second back buffer on the Stan...

Page 21: ...e the optimus will restart Back Erase Pause Pause The optimus sound level meters provide Pause and Back Erase function which can be used during a measurement When the Pause function is enabled in the menu the Stop button is replaced by the Pause Stop button This also enables the Back Erase function the duration of which can be set in the menu Back Erase The Back Erase function allows a section of ...

Page 22: ...lear the memory and permanently delete all stored data choose the Clear Memory Menu page and follow the instructions on screen Before permanently erasing the data you will be asked to press OK to confirm Restore Factory Settings This is in the Advanced Options Menu and restores the optimus to the default options for all user definable settings in the Menus and clears the calibration offset For set...

Page 23: ...ll appear grey on the screen Views The views are accessed by pressing the left and right control keys The views are available when the optimus is measuring not measuring or in review mode but the pages available in each mode will differ Not measuring When not measuring the information shown is live instantaneous values Measuring When measuring these live values are still shown but you are also sho...

Page 24: ...the noise levels divided into 1 3 Octave called third octave frequency bands This can be used for environmental noise measurements and also for noise control applications The 1 3 Octave Band View also provides Leq LF 20Hz 200Hz and LAeq LF 20Hz 200Hz Tone detection This is a capability on some instruments displayed within the 1 3 octave view Instruments with Tone Detection use either the ISO 1996 ...

Page 25: ...EP d Dose and Estimated Dose along with the Projected Exposure Calculator For the EU option this View gives you Leq LEX 8 Dose and Estimated Dose along with the Projected Exposure Calculator For all other options the Lavg TWA Dose and Estimated Dose for two integrators in addition to ISO EU will be shown according to the setting you have chosen Two custom integrators can also be used configured in...

Page 26: ...se the OK soft key to confirm it In the menu pages the Status Bar will display information about your current settings and the option you have chosen The following chapter shows the navigation between the Menus and Pages and the options available For more detailed information please see the appendices Main menu Restart Review stored data Clear memory Advanced options View options Storage options Q...

Page 27: ...ptimus Select any user programmed triggering templates Pause On Off Back Erase Duration 0 30seconds Please note after 5 minutes in pause the optimus will restart View options Set level colours Analog Bar Defaults 80dB Yellow 85dB Red User selectable Time Weighting Fast Slow Impulse Adjust Screen Brightness Fixed Auto default Set date time formats dd mm yy mm dd yy dd mm yy dd mm yy yy mm dd hh mm ...

Page 28: ...mer 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 Quick Settings UK EU OSHA HC and PEL OSHA HC and ACGIH MSHA HC and EC Custom Set Clock Follow the instructions on the screen to set the date and time using the format set in View Options Set Date and Time Format above ...

Page 29: ...o uk library optimus for the latest versions of these documents Technical Note 28 Recording Audio with the optimus green CR 170 sound level meters Technical Note 29 Timer mode options 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 informati...

Page 30: ...pe 1 I or Type 2 I CR 151 CR 152 All versions CR 162 CR 161 All versions CR 171 CR 172 All versions IEC 60804 2000 Type 1 or Type 2 CR 162 CR 161 All versions CR 171 CR 172 All versions IEC 61252 1993 Personal Sound Exposure Meters CR 162 CR 161 All versions CR 171 CR 172 All versions ANSI S1 4 1983 R2006 CR 162 CR 161 All versions CR 171 CR 172 All versions ANSI S1 43 1997 R2007 CR 162 CR 161 All...

Page 31: ...ms 250ms 1 2 sec 1 sec 2 sec User selectable VoiceTag Audio Recording User selectable recording of voice notes before each measurement for download to NoiseTools software Data Logging Versions 30 seconds per recording with audio files downloaded with noise measurement information Size 283mm x 65mm x 30mm Weight 300gms 10oz Batteries 4 x AA Alkaline Battery life Typically 12 hours with Alkaline Bat...

Page 32: ...time octave bands with the highest value for each band updated every 1 16 seconds from 32Hz to 16kHz 16Hz 1 1 Octave Band stored for display in the NoiseTools software Graphical display of cumulative Leq for each octave band Graphical display of cumulative LAeq for each octave band Numeric display of Leq 1s real time octave bands updated every 1 second Numeric display of cumulative Leq for each oc...

Page 33: ...10 0 L50 0 L90 0 L95 0 L99 0 Lns 7 14 are user defined turned off by default Ln values are calculated using 1 16 second LAF samples by default Sampling rate time weighting and frequency weighting can be changed in NoiseTools Instruments with the Statistical Levels x 2 Capability provide a second set of 14 Ln values which can be configured within NoiseTools using independent sampling rate time weig...

Page 34: ...e 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 LA95 Page 2 LAeq 60min o Indicated in Red where LAeq 60min 100dB o Indicated in White where LAeq 60min 100dB LASMax LA95 ...

Page 35: ...Ieq t Time History data rate is user configurable in the global settings Measurement Run Time Time Date of Measurement Start Dose View Overall LAeq2 LAeq3 Lavg stored TWA Dose Est Dose also available Time History LAeq2 LAeq3 Time History data rate is user configurable in the global settings Measurement Run Time Time Date of Measurement Start Integrator 1 values are stored in the Leq module 1 1 Oct...

Page 36: ...q LF LAeq LF 20Hz to 200Hz Time History Leq for each 1 3 octave band 36 items for 6 3Hz to 20kHz stored at the Global data rate minimum duration of 1 16 seconds Measurement Run Time Time Date of Measurement Start Ln View 14 Ln values for each measurement in Ln set 1 14 Ln values for each measurement in Ln set 2 CR 171C CR 172C Moving Average View Page 1 o LASMax o LA95 Page 2 o LASMax o LA95 ...

Page 37: ... Slow Time Weighting 90dB Criterion Level Integrator 3 5dB 90dB Threshold Slow Time Weighting 90dB Criterion Level Custom Custom settings defined by the NoiseTools software Electrical Outputs AC Output The AC Output is provided on the 3 5mm jack socket at the bottom of the instrument Do not use a Stereo Jack Plug in this socket Only use a 3 5mm Mono Jack Plug The AC output has four settings a comb...

Page 38: ...put The DC Output is provided on the 18 Pin Multi IO socket at the bottom of the instrument The output is set to 25mV dB with LAF updated 16 times per second 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 ...

Page 39: ... way D male 1m ZL 174 Optimus AC DC Output 18 way to 2 x Phono 1m ZL 175 Optimus PC cable 18 way to RS232 9 pin D female 1m ZL 176 Optimus 12v Battery pack cable 2m to tinned ends with inline fuse ZL 177 Optimus AC output cable 3 5mm Mono to 3 5mm Stereo Jack 2m ZL 179 Optimus cable for ZE 910 Isolator 18 way to tinned ends 1m ZL 180 Optimus Modem cable 18 way to RS232 9 pin D male with 12V Power ...

Page 40: ...ss the power button again and the indicator will extinguish to show that the unit is switched off Permanent on Mode For some applications there may be a need to have the calibrator switched on continuously To allow for this the calibrator can be turned on by pressing and holding the power button for three seconds Release the button and the indicator will flash to show that the unit is in permanent...

Page 41: ...ophone type fitted to the instrument Background Noise In order for the calibrator to operate as intended the ambient acoustic noise level should be no greater than 80dBA Stabilisation In order for the sound pressure level and frequency to stabilise after switching the calibrator on when coupled to a microphone a period of at least 3 seconds should be allowed before performing a calibration Changin...

Page 42: ...to indicate that the battery voltage is low When the battery voltage is below 6 4 volts the calibrator will not turn on A discharged battery may allow switch on but will soon drop in voltage and indicate low battery or switch off Specifications Frequency 1kHz 1 Sound Level 94dB re 20μPa Standardisation CR 514 IEC 60942 2003 Class 2 CR 515 IEC 60942 2003 Class 1 Distortion Less than 2 Operating Hum...

Page 43: ...e which is to be used for free field measurements a small correction may be necessary to compensate for the difference between the microphone s free field response at zero degrees or head on incidence and the pressure level generated by the calibrator The correction is typically 0 3dB for inch microphones making the effective calibration level 93 7dB Calibration corrections are listed below for th...

Page 44: ...A B C Versions CR 19x Sound Level Meter All versions CR 514 Acoustic Calibrator CR 515 Acoustic Calibrator Along with their standard accessories According to EMC Directives 89 336 EEC and 93 98 EEC meet the following standards Sound Level Meters IEC 61672 1 2002 IEC 61672 2 2003 Acoustic Calibrators IEC 60942 2003 Except where modified by EN 61000 6 1 2007 EN 61000 6 1 2007 EMC Generic emission st...

Page 45: ...ch plc the instrument will automatically be given an additional free one year warranty 9 There will be a charge for this routine verification and the price is published in the Service Price List 10 The customer is responsible for all shipping duty and other charges relating to the routine servicing and calibration of the instruments 11 Where the instrument is deemed to be faulty due to manufacturi...

Page 46: ... 30 IEC 61672 1 2002 30 Impulse 27 Information Bar 19 Input Output Cables 39 ISO 1996 2 2007 24 Keypad 16 LAE 24 LAeq 32 LAeq I 24 32 LAeqLF 33 LAIeq 24 LAIeq t 32 Language 27 31 LCeq 32 LCPeak 32 Leq 35 LeqLF 33 Ln36 Low Battery 20 LxE 32 Lxeq 32 LZPeak 32 Maximum 32 Measurement Display 19 Memory 22 31 Microphone 30 Microphone Extension Cables 39 Minimum 32 MSHA 37 Navigation Bar 19 NC 24 Noise F...

Page 47: ...optimus sound level meter user manual Page 47 ...

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