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Optimus sound level meter - instrument handbook

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2.1

Inserting the batteries

Your Optimus is powered by 4 x AA alkaline batteries (also called MN1500 or LR6). We
recommend that you use alkaline batteries to give the best performance.

Remove the battery cover by loosening the captive locking screw (as shown in the
diagram below).

Please look carefully at the diagram inside the battery compartment that shows the
correct polarity. After inserting the batteries in the correct orientation, replace the cover
and tighten the locking screw.

Battery Polarity Indicators

Battery Cover
Retaining Screw

Battery Cover

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Содержание Optimus Green Series

Страница 1: ...Instrument Handbook Optimus Sound Level Meters ...

Страница 2: ...bes the recommended usage of the Optimus Any warnings will be indicated by the following symbol 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 user manuals It is not possible to change the way that the instrument ...

Страница 3: ... material 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 Microso...

Страница 4: ...oth 5 Getting to know your Optimus 5 1 Views 5 2 High level noise measurement 6 Menus 7 Additional information 8 Appendices 8 1 IEC 61672 test data 8 2 Common specifications 8 3 Views 8 4 Stored measurements 8 5 Electrical outputs 9 Acoustic calibrator 9 1 Setting up the calibrator 9 2 Calibrating a sound level meter 9 3 Changing the battery 9 4 Specifications 9 5 Technical information 10 EU Decla...

Страница 5: ...Optimus sound level meter instrument handbook 5 Microphone capsule Preamplifier Preamplifier locking ring Ambient light sensor Display Soft keys Control keys ...

Страница 6: ...Optimus sound level meter instrument handbook 6 Battery cover screw Battery cover Power button ...

Страница 7: ...t providing the very highest level of performance and function You can t forget to measure the right parameter 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 weighting view option from the menu and then see real time data or review stored measure...

Страница 8: ...gn to future proof your investment The Optimus instruments are based around a modular design which allows you to upgrade and update your instrument if and when the time arises This means that your instrument will meet your current and future needs no matter what you need to measure Audio recording during measurements The Optimus Green instruments can record and store audio data the actual sounds h...

Страница 9: ...ne capsule attached to the preamplifier Wrist strap 4 x AA batteries User manual Windshield You may have other accessories depending on your package Please check for damage or missing items before using your Optimus When connecting the preamplifier please take great care to only turn the locking ring at the base Twisting the preamplifier body is likely to cause serious damage The microphone capsul...

Страница 10: ...Optimus sound level meter instrument handbook 10 ...

Страница 11: ...s to give the best performance Remove the battery cover by loosening the captive locking screw as shown in the diagram below Please look carefully at the diagram inside the battery compartment that shows the correct polarity After inserting the batteries in the correct orientation replace the cover and tighten the locking screw Battery Polarity Indicators Battery Cover Retaining Screw Battery Cove...

Страница 12: ...measurements to help with analysing the results and ensuring the accuracy of the data It is important to check that the instrument s clock is correctly set before starting a measurement session It is visible on the top right corner of the screen To set the clock press the menu button after the instrument has been turned on Select the Set Clock menu and follow the instructions on screen Please note...

Страница 13: ...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 into the cavity and is past the O ring seals Ensure that the small ...

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

Страница 15: ...on will 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 The pause back erase function is only available if this has been enabled in the instrument menu more information on page 22 To stop the measurement press the stop key The inst...

Страница 16: ...instruments without data logging only the last recorded measurement is available for review 4 1 NoiseTools All Optimus instruments can be used with the NoiseTools software which can be used to configure the instrument some options are only configurable within NoiseTools and not on the instrument it will be made clear in the text where this is the case NoiseTools is also a powerful environment for ...

Страница 17: ...he right soft key switches between pause and stop Press once to pause reverse back the measurement and twice to stop the measurement Alternatively press and hold the button for three seconds to stop the measurement 4 3 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 Protective cover Open by pulling t...

Страница 18: ...e options in the AC out menu This output can be used with external instrumentation See page 39 for details of the electrical outputs 4 4 Screen saver If no keys are pressed for 6 minutes the display will dim to preserve battery and screen life and reduce power consumption After 30 minutes with no key presses the display will switch off completely and the keypad will flash every two seconds to show...

Страница 19: ...ng at 4 5 3 Measurement display In addition to primary and secondary functions the display features an analogue bar on the left of the screen which shows real time A weighted sound level At the bottom of the screen is the Page information for your View i e 1 of 3 Timer Mode Active Audio Recording Trigger Ready Bluetooth Enabled Overload Indicator External USB Power Battery Level Indicator Primary ...

Страница 20: ...s the overload and under range indicators will be shown simultaneously In this case the text will be abbreviated to save space Note that if any displayed decibel value on the sound level view or Leq view is below 14 0 dB the value will be replaced by dashes These levels are typically below the noise floor of the microphone capsule and so will only be encountered during electrical testing 4 5 6 Blu...

Страница 21: ...fer will cover the time it takes you to respond and press record 10 seconds is the default duration which can be changed in NoiseTools The time history display and analogue bar turn blue when audio recording is running and revert to green when it has stopped Starting and stopping audio recordings during a measurement does not affect the noise measurement data being recorded Please note VoiceTags a...

Страница 22: ...ion 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 Please note that the measurement will automatically resume after five minutes in pause mode 4 8 2 Back erase The back erase function allows a section of the measurement to be removed from the data used to calculate the overall values...

Страница 23: ...lt the Optimus will return to the option it was shipped with Follow the instructions on the screeen and press OK to confirm This does not delete any stored measurements 4 11 Windshield The Optimus can be used with a UA 237 90 mm foam windshield which will reduce the noise levels generated by air turbulence over the microphone capsule It can also help protect the microphone capsule from dust and fl...

Страница 24: ...ndbook 24 The bluetooth symbol in the information bar turns green when connected Please note Bluetooth on the Optimus is connected to Port 2 meaning that it cannot be enabled as the same as GPS when used as part of an outdoor measurement kit ...

Страница 25: ...essed 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 shown cumulative overall values for the current measure...

Страница 26: ... 5 1 6 Tone detection This is a capability displayed within the 1 3 octave view on some instruments Instruments with tone detection use either the ISO 1996 2 2007 simplified method or an improved method developed by Cirrus Research which is based on the ISO standard extended to include tones between bands tones in outer bands and Z weightings The ISO method only applies to overall data when measur...

Страница 27: ...d 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 NoiseTools When chosen they will be shown in addition to ISO EU 5 1 9 Moving average view The moving average view is available o...

Страница 28: ... noise measurement The Optimus sound level meters can be used to measure high noise levels up to 170 dB with the use of the optional MV 200EH high level noise measurement option 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 Op...

Страница 29: ...led information please see the appendices 6 1 1 Main menu Restart Review stored data Clear memory Advanced options View options Storage options Quick settings Set clock 6 1 2 Restart Pressing restart at any time during a measurement resets the elapsed time to zero and deletes the data for that measurement only 6 1 3 Review stored data The left and right keys navigate between the different views se...

Страница 30: ...ck erase duration 0 30 seconds Note After 5 minutes in the pause state the Optimus will be restarted Auto audio On off Set duration for length of audio to be recorded at the start of a measurement 10 to 120 seconds 6 1 6 View options Set level colours analogue bar Defaults 80 dB Yellow 85 dB Red User selectable Time weighting Fast Slow Impulse Adjust screen brightness Fixed Auto default Set date t...

Страница 31: ...g octaves VoiceTag On off Single timer On off 1 min 2 min 5 min 15 min 30 min 1 h custom default 10 min Repeat timer On off 1 min 2 min 5 min 15 min 30 min 1 h custom default 10 min Day evening night 6 1 8 Quick settings UK EU OSHA HC and PEL OSHA HC and ACGIH MSHA HC and EC Custom 6 1 9 Set clock Follow the instructions on the screen to set the date and time using the format set in View Options S...

Страница 32: ...o uk library user manuals 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 info...

Страница 33: ... versions CR 191BE CR 192BE CR 193BE CR 194BE IEC 60651 2001 Type 1 I or Type 2 I CR 151 CR 152 All versions CR 161 CR 162 All versions CR 171 CR 172 All versions IEC 60804 2000 Type 1 or Type 2 CR 161 CR 162 All versions CR 171 CR 172 All versions IEC 61252 1993 personal sound exposure meters CR 161 CR 162 All versions CR 171 CR 172 All versions ANSI S1 4 1983 R2006 CR 161 CR 162 All versions CR ...

Страница 34: ...d noise 19 dB A Class 1 22 dB A Class 2 Frequency weightings RMS A C Z measured simultaneously Peak A C Z measured simultaneously Time weightings Fast Slow Impulse measured simultaneously Display High resolution display with ambient light sensor illuminated keypad Display of Measured parameters Recalled measurement parameters data logging versions Battery level external power connection Overload u...

Страница 35: ...alkaline Battery life Typically 12 hours with alkaline batteries Battery life is dependent upon the battery type and quality and screen brightness External power 5 V via USB socket from PC 12 V via Multi IO socket Tripod mount 1 4 Whitworth socket Case material High impact ABS PC with soft touch back keypad Temperature Operating 10 C to 50 C Storage 20 C to 60 C Humidity Up to 95 RH non condensing...

Страница 36: ...ative 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 octave band Numeric display of cumulative LAeq for each octave band Measurement run time 8 3 4 1 3 octave band view Graphical display of LF real time 1 3 octave bands with the highest value for ea...

Страница 37: ...ent sampling rate time weighting and frequency weighting 8 3 6 Dose view Integrator 1 Integrator 2 Integrator 3 Run time Run time Run time Leq1 Leq2 Leq3 LEP d Lex TWA TWA Dose Dose Dose Est dose Est dose Est dose Configuration Configuration Configuration Measurement run time 8 3 7 Moving average view Page 1 LAeq 15min Indicated in red where LAeq 15min 95 dB Indicated in yellow where LAeq 15min 85...

Страница 38: ...en the instrument is measuring Graphical display Lf real time 1 3 octave bands with the highest value for each band updated every 1 16 second Tonal noise detection when not set to the ISO option instruments with Tone Detection Capability only The y time weighting of the LAymax can be changed on the View Options Time Weighting menu German Language Page 1 LAeq LAymax L95 C A LCeq LAeq LAFT5eq LAFT5e...

Страница 39: ...asurements 8 4 1 Sound level view Overall LxyMax where x A C Z y F S I 9 items Overall LxyMin where x A C Z y F S I 9 items Time history LxyMax where x A C y F S I 6 items Measurement run time Time date of measurement start Time history data rate is user configurable in the global settings 8 4 2 Leq View Overall LCPeak LZPeak LAPeak LAeq LCeq LZeq 6 items Time history LAeq LCeq LZeq Time history L...

Страница 40: ...and 36 items from 6 3 Hz to 20 kHz Leq LF and LAeq LF 20 to 200 Hz Time history Leq for each 1 3 octave band 36 items from 6 3 Hz to 20 kHz stored at the global data rate minimum duration of 1 16 seconds Measurement run time Time date of measurement start 8 4 6 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 8 4 7 Moving average v...

Страница 41: ... 5 dB 80 dB threshold slow time weighting 90 dB criterion Level Integrator 3 5 dB 90 dB threshold slow time weighting 90 dB criterion Level Custom Custom settings defined by the NoiseTools software 8 5 Electrical outputs 8 5 1 AC output The AC output is provided on the 3 5 mm jack socket at the bottom of the instrument Do not use a stereo jack plug in this socket Only use a 3 5 mm mono jack plug T...

Страница 42: ...alidate your warranty 8 5 3 Threshold triggered output An external discrete available on the 18 Pin Multi IO socket at the bottom of the instrument can be triggered when an audio trigger event is detected This trigger will toggle the output from 0 to 3 3V and can be used to trigger external devices for example a camera or noise warning sign The trigger output can be enabled in NoiseTools as an eve...

Страница 43: ...e fuse ZL 177 Optimus AC output cable 3 5 mm mono to 3 5 mm stereo jack 2 m ZL 179 Optimus cable for ZE 910 isolator 18 way to tinned ends 1 m ZL 180 Optimus modem cable 18 way to RS232 9 pin D male with 12 V power input 2 1 mm jack 1 m ZL 181 Optimus PC cable 18 way to RS232 9 pin D female with 12V power input 2 1 mm jack 1 m ZL 182 Optimus Fujitsu printer cable 18 way to multiway 1 m ZL 183 Opti...

Страница 44: ...utton 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 on mode Press...

Страница 45: ...2 1 Background noise In order for the calibrator to operate as intended the ambient acoustic noise level should be no greater than 80 dB A 9 2 2 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 9 3 Changing the battery The CR ...

Страница 46: ...ery voltage is below 6 4 volts the calibrator will not switch on A discharged battery may allow switch on but will soon drop in voltage and indicate low battery or switch off 9 4 Specifications Frequency 1 kHz 1 Sound level 94 dB re 20 μPa Standardisation CR 514 IEC 60942 2003 Class 2 CR 515 IEC 60942 2003 Class 1 Distortion Less than 2 Operating humidity 25 to 90 relative humidity Operating stati...

Страница 47: ...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 3 dB for Cirrus inch microphones making the effective calibration level 93 7dB An example of the procedure used to calculate the value for an MK 224 MK 229 or MK 216 microphone is shown below Level 94 0 dB microphone correction Level 94 ...

Страница 48: ...und Level Meter All versions CR 514 Acoustic Calibrator CR 515 Acoustic Calibrator Along with standard accessories According to EMC Directive 2014 30 EU Low Voltage Directive 2014 35 EU RoHS Directive 2011 65 EU meet the following standards EN 61000 6 3 2007 A1 2011 Electromagnetic compatibility EMC Generic standards Emission standard for residential commercial and light industrial environments EN...

Страница 49: ...alibration Centres for routine verification and calibration after the initial guarantee period upon completion of the verification the product will be given an additional free one 1 year warranty This must be done within a 6 week window of the anniversary date of shipment This is limited to 3 weeks either side of the anniversary date of the shipment It follows that if an instrument is routinely ve...

Страница 50: ...tation charges prepaid 10 Where the product is deemed to be faulty due to manufacturing defects Cirrus Research plc shall a Repair or replace the defective products b Be given reasonable time by the customer to make such repairs or replacements c Return the product to the customer at Cirrus Research plc s expense 11 Cirrus Research plc reserves the right to decline an instrument under the initial ...

Страница 51: ...s provided that the user has used the correct charging instructions and has followed the charging regime stated in the product manual 14 No warranty is offered for used equipment unless a special arrangement is made and is confirmed in writing by Cirrus Research plc 15 Cirrus Research plc reserves the right to amend or update these terms and conditions without notice This warranty does not in any ...

Страница 52: ...891655 Fax 44 0 1723 891742 Email sales cirrusresearch com Website www cirrusresearch co uk Cirrus Germany Cirrus Research plc Deutschland Arabella Center Lyoner Strasse 44 48 D 60528 Frankfurt Germany Telephone 49 0 69 95932047 Fax 49 0 69 95932049 Email vertrieb cirrusresearch de Website www cirrusresearch de Cirrus Spain Av Diagonal 468 6 08006 Barcelona España Telephone 34 933 622 89 Email inf...

Страница 53: ...Notes This page has been intentionally left blank for notes ...

Страница 54: ...Notes This page has been intentionally left blank for notes ...

Страница 55: ...Notes This page has been intentionally left blank for notes ...

Страница 56: ...Version 1 Q4 2018 www cirrusresearch co uk sales cirrusresearch co uk ...

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