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CR:800B User Manual - Cirrus Research plc

1. Battery Holder f USB Socket 8 7 Multi I O Socket oo Connect to USB Port on PC Connect to USB Port on PC Page 50 CR 800C Series Sound Level Meter User Manual 5 8 Understanding how the measurements are stored The memory of the CR 800C can store up to 1 300 measurements Each measurement is Known as an Event and can be either Broadband 1 1 Octave Band or 1 3 Octave Band The duration of each measurement does not affect the size that it takes but the different measurements types take up different amounts of space in the instrument memory For example a Broadband measurement take 1 memory slot a 1 1 Octave measurement takes 2 memory slots and a 1 3 Octave measurement takes 3 memory slots The diagram below shows how the different measurements take up different amounts of memory space The maximum time over which Broadband measurements can be stored depends upon the duration of the measurement The table below shows the maximum time over which measurements can be made Please note that this applies only to Broadband Measurements using the Auto Repeat function Measurement Duration Maximum Length of Measurement 1 minute 21 5 hours 5 minutes 4 5 days 15 minutes 13 5 days 30 minutes 27 days 1 hour 54 days With each Broadband Measurement is als
2. Page 68 CR 800C Series Sound Level Meter User Manual 11 Appendix 3 CE Certificate of Conformity A Cirrus Research plc We the undersigned Manufacturer s name Cirrus Research plc Manufacturer s address Bridlington Road Hunmanby YO14 OPH North Yorkshire UK Certify and declare that the following apparatus Product description Sound Level Meters Product name CR 800C Series Product Number CR 812C CR 811C CR 822C CR 821C CR 832C CR 831C Product description Acoustic Calibrators Product name CR 510 Series Product Number CR 515 CR 514 conforms with the essential requirements of the following Directives EU EMC Directive Dec 2004 2004 108 EU Applied Harmonised standards where appropriate EN 61000 6 3 2007 EN 61000 6 1 2007 Except where modified by IEC 61672 1 2002 IEC 61672 2 2003 IEC 61942 2003 Signed for and on behalf of Cirrus Research plc Date 10 January 2008 Mr S T O Rourke Engineering Director CR 800C Series Sound Level Meter User Manual Page 69 12 Warranty Information 1 This document is a summary of the full warranty document and explains the Cirrus Research plc warranty in ordinary English not in legal or complex terms 2 The warranty covers any acoustic instrument such as a sound level meter acoustic calibrator real time acoustic analyser or personal sound exposure meter dosemeter manufactured by Cirrus Research plc after March ist 2007 3 The warranty covers all
3. Repx Syncx 00 30 00 Page 41 Comments The Ln to be changed can be selected using the Up and Down arrow keys Press OK to select the Ln to change In this example the Lni has been selected Use the Up and Down arrow keys to change the value and the Left and Right arrow keys to move between the numbers Press OK to accept the changes or Exit to discard any changes The other Ln values can be altered in the same manner as shown above User Metric The additional measurement parameter provided the CR 800C instrument is known as the User Metric This measurement parameter can be selected to be either Le Sound Exposure Level SEL Lteg Impulse Weighted Time Weighted Sound Level or Larrea Takt Maximal Sound Level Key Press Display Setup Time Weighting gt Frequency Weighting Change Ln Vales User Metric gt y 00 30 00 Repx Syncx User Metric OK Syncx 00 30 00 Comments Select the required User Metric and press OK to select The select User Metric is indicated by a tick Press Exit to return to the main display Page 42 CR 800C Series Sound Level Meter User Manual Note that if the Lleq t function is selected the CR 800C will automatically A select the Impulse Time Weighting which will apply to all other measurement functions described Before the Time Weighting can be selected to either Fast or Slow the User Metric must be set to SEL Configuring the inst
4. Up to 95 RH Non Condensing 9 21 External Connections Data Output USB Type B Socket Multi pin Expansion Socket 9 22 Output Cables Standard ZL 100 USB Cable supplied as standard Optional ZL 811 Power Adaptor Cable for CU 195A Power Supply ZL 812 AC Output Cable to Phono Plug ZL 813 RS232 Output ZL 814 Multi IO Interface Cable 9 23 Software Support Deaf Defier3 for Windows System Requirements The Deaf Defier3 for Windows requires the following Microsoft Windows 95 or later 6Mb of available hard disk space for program files CD ROM Drive VGA or higher resolution monitor Super VGA Recommended Microsoft compatible mouse or pointing device 9 24 Factory Options MO 800 1 Upgrade from Class 2 to Class 1 MO 800 2 Upgrade from Broadband to 1 1 Octave Band Filters MO 800 3 Upgrade from Broadband to 1 1 amp 1 3 Octave Band Filters MO 800 4 Upgrade from 1 1 to 1 1 amp 1 3 Octave Band Filters MO 800 5 Remote Preamplifier for Class 2 Instruments MO 800 6 20Hz amp 20kHz 1 3 Octave Band Filters Electromagnetic Performance EN 61000 6 3 2007 EN 61000 6 1 2007 Page 62 CR 800C Series Sound Level Meter User Manual 10 Appendix 2 Acoustic Calibrators 10 1 Operation 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 Power Button CR 514 Acoustic Calibrator rus Research ple 94dB 1kHz K I
5. A Weighting y C Weighting The select Frequency Weighting is Z Weighting indicated by a tick OK Press Exit to return to the main Repx Syncx 00 30 00 display The Frequency Weighting applies to the following parameters Broadband Mode Integrated Sound Level LaegrLceg OF LZeg Sound Level Lar Las Lar Lcr Los Ler Lze Lzs or Lx not stored Maximum Sound Leve LaFmaxy Lasmaxr Latmax LcFmax Lcsmax Lcimax LzFmax Lzsmax or Lz max Minimum Sound Level LaFmin Lasminy Latmin Lcrmins Lesminy Lcrmin LzFmin Lzsmin OF Lzimin User Metric Lae Lce Or Lze Lategr Lcteqs or Lziegr Larteq 1 1 Octave Band Mode No measurements are affected by the Frequency Weighting All 1 1 Octave Bands are measured with the Z Frequency Weighting 1 3 Octave Band Mode No measurements are affected by the Frequency Weighting All 1 3 Octave Bands are measured with the Z Frequency Weighting Ln values The five preset Ln or Statistical values that are calculated at the end of a Broadband measurement can be configured to different values The default values are Lio Lio o Lso o Loo o and Los 0 To change the Ln values select Change Ln Values from the Setup Menu CR 800C Series Sound Level Meter User Manual Key Press Display Setup Time Weighting gt Frequency Weighting P Change Ln Values User Metric gt v 00 30 00 Repx Syncx Change Ln Values OK Repx Syncx 00 30 00 OK Change Ln Values Ln 1 01 0
6. Range Steps 10 80 20 90 30 100 40 110 50 120 60 130 70 140 9 10 Noise Floor Typical Broadband 18dB A Class 1 20dB A Class 2 1 1 Octave Band Filters 12dB Z 1kHz 1 1 Octave Band 1 3 Octave Band Filters 7dB Z 1kHz 1 3 Octave Band 9 11 Available Measurements The following metrics can be displayed for a recorded session and stored Broadband Mode Lcpeak Lar Las Lar Lcr Les Lcr Lzr Lzs or Lz1 not stored LaFmax Lasmaxs Latmaxs Lermaxs Lesmaxr Lcimaxs LzFmaxr Lzsmax or Lzimax Larmins Lasminy Latmins LcFmins Lcsmin Letminy LZFmin Lzsmin or LzImin Lae Lcegr or LZeg Lae Lce Or Lze LareqrLcreqr OF Lzteq Larteg Lo 1 to Loo 9 five simultaneous user selected values available Run time Date and time 1 second Short Leg Noise Profile The Ln data is calculated from the Sound Level data and is Time Weighted according to the selected Time Weighting Filter mode 1 1 or 1 3 filter selected Selected frequency Filtered Lzs Lzf or Lz1 not stored Filtered Lzeq stored Laegr Lcegr Lzeg stored Run time Date and time Page 60 CR 800C Series Sound Level Meter User Manual 9 12 Frequency Bands Nominal Frequencies 1 1 Octave Band 31Hz 63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz 16kHz 1 3 Octave Band 25Hz to 16kHz 20Hz 8 20kHz with MO 800 6 Factory Option 9 13 Memory 16Mbit memory allowing up to 1300 broadband measurements 770 1 1 octave measurements 330 1 3 octave measurements For exa
7. the correct level The calibration fails Unstable The background noise level is within 15dB of the calibration level Move to a location where the background noise level is more than 15dB below the calibration level The Microphone may be damaged Contact Cirrus Research plc or your local representative for assistance Page 54 7 3 Measurements amp Settings CR 800C Series Sound Level Meter User Manual Symptom Possible Cause Possible Remedy No measurements have been stored Memory is full Check the available memory See page 45 The measurement was reset Restart the measurement In 1 1 or 1 3 Octave Band Mode the filters do not automatically sweep The Run Duration has been set to Manual Select a Preset Run Duration The measurements are not aligned with the clock The Auto Synchronise function is switched off Switch on the Auto Synchronise function Instrument has selected Impulse Time weighting Liegt User Metric may have been selected Select SEL User Metric and change Time Weighting required Overload symbol is shown The noise level is too high for Select a higher measurement the current range range Under Range symbol is shown The noise level is too low for Select a lower measurement the current range range The measurement stops after a set time The Run Duration has been set to a preset value Select the Manu
8. to 140dB and the noise level is Jod 60dB to 130dB 50dB to 120dB The instrument is under ranging 40dB to 110dB and the U L symbol is shown A 4 14 07 07 15 25 03 The bar graph at the top of the screen can be used to select the appropriate measurement range As the user moves between the different measurement ranges the bar graph changes the top and bottom to match the measurement range The noise level being measured is shown in the bar graph 70dB to 140dB 60dB to 130dB 50dB_to 120dB 40dB to 110dB 14 07 07 15 25 03 40dB to 110dB 30dB to 100dB 20dB to 90dB 40dB to 110dB 14 07 07 15 25 03 70dB to 140dB 60dB to 130dB 50dB to 120dB 40dB to 110dB v 14 07 07 1 5 25 3 03 Select the appropriate measurement range to suit the noise levels to be measured Page 36 CR 800C Series Sound Level Meter User Manual 4 8 Instrument Setup Select the Setup option from the main menu and press OK Key Press Display Comments CR 800C Main Menu ST OK Run Durations gt Print Options v Repx Syncx 00 30 00 Display Contrast To adjust the contrast of the display select the Contrast Option and press OK Key Press Display Comments Setup Contrast Set Clock gt Cal Level Resolution v Repx Syncx 00 30 00 Contrast Select the Lighter or Darker option a and press the OK repeatedly to adjust the selection Darker Press the Exit button t
9. value and then stop storing the measurement in the memory CR 800C Series Sound Level Meter User Manual Page 23 The user can override the automatic sweep by pressing the Up arrow key to step to the next frequency band The display will show until enough data has been accumulated to give an accurate measurement Key Press Display Comments The instrument has not accumulated sufficient data to give an accurate measurement When enough information has been gathered the LZeq value will be displayed Elapsed 00 01 00 1 3 Octave Band Mode Key Press Display Comments When the measurement is running the display shows Running in the top left hand corner MAI Elapsed 00 01 00 If the measurement duration is set to Manual the 1 3 Octave Band frequency will stay on the current frequency until the Up arrow is pressed At the end of the measurement the user must press the Stop key to end the measurement and store the information in the memory When the measurement duration is set to any option other than Manual the instrument will automatically sweep through the 1 3 Octave Bands in the set duration After the 16kHz 1 3 Octave Band the instrument will measure a dB A dB C and then a dB Z value and then stop storing the measurement in the memory The user can override the automatic sweep by pressing the Up arrow key to step to the next frequency band The display will show until enough data has be
10. CP 65 Carrying Pouch for Sound Level Meter CT 1 Tripod CM 270 1 Preamplifier Tripod Mount ZL 202 2m Microphone Extension Cable ZL 205 5m Microphone Extension Cable ZL 210 10m Microphone Extension Cable ZL 225 25m Microphone Extension Cable ZL 100 USB Data Cable ZL 812 AC Output Cable to Phono Connector ZL 813 RS232 Output Cable CK 408C Outdoor Measurement Kit CK 508C Lightweight Outdoor Measurement Kit CU 800C Mains Power Supply UK US EU SW DD3 Deaf Defier3 Software Page 8 CR 800C Series Sound Level Meter User Manual 3 Getting Started 3 1 How to These example settings are designed to demonstrate the different configurations that are available from the CR 800C Sound Level Meters Please check the configuration of the instrument to match the measurement requirements of your application before making a measurement Make a 15 minute Broadband Measurement 1 Switch on Calibrate Set Measurement Mode to Broadband Set measurement duration to 15 minutes Switch off Auto Repeat amp Auto Synchronise Set Measurement Range Start Measurement a Run for 15 minutes Stop Measurement Review Measurement Data PUT ON O 00 Make a 1 1 Octave Band Measurement over 1 minute 1 Switch on Calibrate Set Measurement Mode to 1 1 Octave Band Set Measurement Duration to 1 minute Set Measurement Range Start Measurement a Run for 1 minute 7 Stop Measurement 8 Review Measurement Data DO Make a 1 3 Octave Band Measurement
11. CR 800C i 01 23 11 07 14 56 01 INTEGRATING AVERAGING SOUND LEVEL METER Menu A Range Display Exit Reset A n ED CR 822C J Cirrus Research plc Display Battery Holder CR 800C Series Sound Level Meter User Manual Page 15 3 5 Assembly The CR 800C instruments are supplied fully assembled apart from the MV 200D Preamplifier for Class 1 instruments and the batteries Preamplifier The Class 1 versions of the CR 800C CR 811C CR 821C and CR 831C are supplied with a removable preamplifier the MV 200D Also a removable preamplifier may be fitted as an option to the Class 2 instruments This preamplifier must be connected to the Sound Level Meter before the unit is switched on This unit is connected to the top of the CR 800C using a locking ring To connect the MV 200D Preamplifier follow the diagram below 1 Place the preamplifier into the socket on the Sound Level Meter 2 Ensure the connector has located into the socket 3 Tighten the Locking Ring Do not cross thread the locking ring Damage caused by misuse is not covered by the warranty for the instrument Removing the Preamplifier Do not twist the preamplifier body Unscrew the locking ring and pull the preamplifier from the Sound Level Meter Using Microphone Extension Cables The CR 800C instruments can be used with a microphone extensio
12. Calibrated calibrator may not be fitted correctly to the sound level meter Press Exit Key 3 9 Starting a measurement Broadband Mode Key Press Display Comments gt Running LAF 59 8 Bb When the measurement is A 1 O running the display shows E C Running in the top left hand corner ld LAeqt JA JE Elapsed 00 08 23 If the user does not stop or reset the measurement the instrument will run for the preset measurement duration At the end of the measurement the information will be automatically stored in the memory If the Auto Repeat function is enabled the next measurement will start automatically at the end of the previous measurement 1 1 Octave Band Mode Key Press Display Comments gt Running 59 8 i When the measurement is A 1 3 running the display shows Z K Running in the top left hand 31 5Hz lo Vamo Vem 1 1 Oct corner LZeqt a Elapsed 00 01 00 If the measurement duration is set to Manual the 1 1 Octave Band frequency will stay on the current frequency until the Up arrow is pressed At the end of the measurement the user must press the Stop key to end the measurement and store the information in the memory When the measurement duration is set to any option other than Manual the instrument will automatically sweep through the 1 1 Octave Bands in the set duration After the 16kHz 1 1 Octave Band the instrument will measure a dB A dB C and then a dB Z
13. List 11 It follows that should the instrument be routinely verified by Cirrus Research plc every year the warranty is effectively continuous to a maximum of 12 twelve years from the date of purchase 12 Cirrus Research endeavour to ensure stocks of instrument components for the full twelve year period but do not guarantee to do so as certain components do become obsolete or discontinued 13 If a sub component becomes obsolete and stocks are depleted then Cirrus Research will endeavour to facilitate a repair but will not offer the same length guarantee 14 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 15 The warranty does not in any way reduce any legal right of the buyer or user of the sound level meter it is in addition to all legal rights determined by the European Union Page 70 CR 800C Series Sound Level Meter User Manual 13 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 at the address below Contact details for Cirrus Research authorised distributors and agents are also available from the Internet Web site at the address shown below Main Office Cirrus Research plc Acoustic House Bridlington Road Hun
14. Meter Noise Measurements using parameters which include all the audible noise such as dB A and dB C A standard weighting of the audible frequencies used for the measurement of Peak Sound Pressure level A label used to show that the Sound Level Meter conforms to the specification of a European Directive Decibels A weighted Decibels C Weighted Decibels Z weighted The units of sound level and noise exposure measurement German Standard which defines the additional measurements LarTeg amp Liegt A standard time weighting applied by the Sound Level Meter The International Standard for Sound Level Meters The International Standard for Integrating amp Integrating Averaging Sound Level Meters The International Standard for 1 1 Octave amp 1 3 Octave Band Filters The International standard for Sound Level Meter and Integrating Averaging Sound Level Meters that replaces both IEC 60651 and IEC 60804 A standard time weighting applied by the Sound Level Meter A Sound Level Meter which accumulates the total sound energy over a measurement period and calculates an average The noise level exceeded for 10 of the measurement period with A frequency weighting calculated by statistical analysis The noise level exceeded for 90 of the measurement period with A frequency weighting calculated by statistical analysis Sound Exposure Level SEL with A frequency weighting Equivalent continuous sound pressure level A measure
15. Please wait CR 800C Main Menu Calibrated to 93 7 dBA Press Exit Key If the calibration is successful press the exit key to return to the main screen Page 10 CR 800C Series Sound Level Meter User Manual Set the measurement duration Press the menu key to view the current measurement duration and the status of the auto repeat and auto synchronise function At the bottom of the screen is the current configuration In this example the measurement duration is set to 15 minutes The Auto Repeat function is switched on The Auto Synchronise function is switched on CR 800C Main Menu I Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode vy RepyY SyncyY 00 15 00 Rep GyneV 00 15 00 If the measurement duration is not as required use the Measurement Duration menu option to set the required measurement duration Refer to page 30 for details of setting the measurement duration Check the measurement range Press the Range key to check the current measurement range Key Press Display Comments Range In this example the measurement E N range is set to 70dB to 140dB 60dB to 130dB Range 50dB to 120dB 40dB to 110dB v 14 07 07 15 25 03 To change the measurement range use the Up and Down Arrow keys to highlight the required measurement range press OK Change the measurement function To check the current measurement function and to change the measurement function
16. disk space for program files 64Mb RAM 128Mb recommended CD ROM Drive for Installation VGA or higher resolution monitor Super VGA Recommended Microsoft compatible mouse or pointing device USB Connection 5 6 Installation Requirements Cirrus Research plc accepts no responsibility for the installation of the Deaf Defier3 software where the system requirements are not fully met and where the user does not have the correct configuration or access rights to enable the software to install correctly Microsoft is a registered trademark of the Microsoft Corporation Windows 95 Windows98 Windows ME and Windows XP are registered trademarks of the Microsoft Corporation CR 800C Series Sound Level Meter User Manual Page 49 5 7 Connecting the instrument to the PC The CR 800C instruments connect to the PC using the supplied ZL 100 USB Cable Connect the ZL 100 USB Cable to the USB socket on the bottom of the instrument Ensure that the cable is inserted correctly with the arrow on the top of the connector Do not force the connector into the socket as this may cause damage When the Deaf Defier3 software is installed and run use the Download option to connect to the instrument Please refer to the Help provided with the Deaf Defier3 software for details of the download procedure Cirrus Cirrus Research ple i B
17. facing the table the antenna polarisation horizontal and the calibrator switched on CR 800C Series Sound Level Meter User Manual Page 67 10 5 Free Field Correction When calibrating a microphone 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 Y inch microphones making the effective calibration level 93 7dB The table below shows the correction values for the standard microphones of Cirrus Research plc Calibration corrections are listed below for the Cirrus Research plc 12 Capsules and three microphone capsules commonly used in Calibration Laboratories Microphone Correction Values Microphone Type Calibration Correction Effective Calibration Level MK 202 0 3dB 93 7 dB MK 215 0 3dB 93 7 dB MK 216 0 3dB 93 7 dB MK 226 0 3dB 93 7 dB MK 224 0 3dB 93 7 dB B amp K 4134 OdB 94 0 dB B amp K 4180 OdB 94 0 dB B amp K 4192 OdB 94 0 dB Example An example of the procedure used to calculate the value for an MK 224 microphone is shown below Level 94 0dB Microphone Correction Level 94 0dB 0 3dB Level 93 7dB Different microphones will have different correction values Please check the operation manual for the Sound Level Meter or microphone concerned for details
18. function is not activated Start button pressed 10 minute 10 minute 10 minute 10 minute 10 minute measurement measurement measurement measurement measurement 12 00 12 10 12 20 12 30 12 40 12 05 This method of starting and stopping the measurements is used for example when the application is Occupational Noise and the user wants to control the starting and stopping of the measurement directly 12 50 However in many applications such as Environmental Noise it is important to start the measurements at a predetermined time For example when making environmental noise measurements that are for 10 minutes the CR 800C can be set to start the measurements on 10 minute boundaries The diagram below show the measurement starts with the Auto Sync function enabled Start button pressed 5 minute 10 minute 10 minute 10 minute 10 minute 10 minute measurement measurement measurement measurement measurement measurement 12 00 12 10 12 20 12 30 12 40 12 05 To enable the Auto Sync function select the Run Duration option from the menu and then select the Synchronise function Use the Up and Down arrows to switch on the off the Auto Synchronise function Press Exit when finished 12 50 Key Press Display Page 34 CR 800C Series Sound Level Meter User Manual Run Duration I E OK User Defined Set User Time p Auto Repeat gt Synchronise gt vy 00 30 00 Repx Syncx Synchronise I Of
19. has been fitted with the 1 1 Octave Band or the 1 3 Octave Band filters these measurements will be available In the 1 1 or 1 3 Octave Band Filter Mode the CR 800C instrument provide a sequential sweep through the filter bands over the measurement duration In addition to the frequency bands the instruments also provide a measurement of the overall Laeg Lceg and Lzeq functions Function Frequency Displayed Stored Weighting as Measurement Applies to Sound Level with Fast 1 1 amp 1 3 Time Weighting HE No Octave Bands 1 1 amp 1 3 Equivalent Continuous LESH veS Octave Bands Sound Pressure Level A LAeqt Yes Broadband with integration time t C LCeqt Yes Broadband Z LZeqt Yes Broadband The 1 1 Octave Band Filters cover the following frequency bands 31 5Hz to 16kHz The 1 3 Octave Band Filters cover the following frequency bands 25Hz to 16kHz When the MO 800 6 Options is fitted the 1 3 Octave Band Filters include the additional 20Hz and 20kHz 1 3 Octave Band Filters 2 5 Options amp Accessories The CR 800C Series are also available with a range of options and accessories that can enhance the performance and applications of the instrument For full details please contact Cirrus Research plc or your local representative The most commonly used accessories are listed below CR 514 Class 2 Acoustic Calibrator CR 515 Class 1 Acoustic Calibrator UA 237 Windshield CK 250 Carrying Case
20. of the average sound pressure level during a period of time t in dB with A weighting Sound level with A Frequency weighting and Fast Time weighting The maximum Sound level with A Frequency weighting and Fast Time weighting The minimum Sound level with A Frequency weighting and Fast Time weighting Takt maximal sound level as defined by DIN 45641 Sound level with A Frequency weighting and Impulse Time weighting The maximum Sound level with A Frequency weighting and Page 56 Latmin Las Lasmax Lasmin Loe Lceg t Lor LcFmax Ler Letmax Le peak Les Lesmax Lera Leg LiegT Ly LzImax Lzs Lzsmax Overload Peak SEL Slow Time Weighting CR 800C Series Sound Level Meter User Manual Impulse Time weighting The minimum Sound level with A Frequency weighting and Impulse Time weighting Sound level with A Frequency weighting and Slow Time weighting The maximum Sound level with A Frequency weighting and Slow Time weighting The minimum Sound level with A Frequency weighting and Slow Time weighting Sound Exposure Level SEL with C frequency weighting Equivalent continuous sound pressure level A measure of the average sound pressure level during a period of time t in dB with C weighting Sound level with C Frequency weighting and Fast Time weighting The maximum Sound level with C Frequency weighting and Fast Time
21. press the menu key Use the Up and Down arrows keys to select the required measurement mode and OK to Select the mode required Key Press Display Comments CR 800C Series Sound Level Meter User Manual CR 800C Main Menu ST Menu Calibrate 1 1 Octave Mode 1 3 Octave Mode y 00 30 00 Repx Syncx CR 800C Main Menu ST Calibrate Broadband Mode 1 1 Octave Mode V 1 3 Octave Mode vy 00 30 00 Repx Syncx CR 800B Main Menu aT Calibrate Broadband Mode 1 1 Octave Mode 1 3 Octave Mode Vv 00 30 00 Repx Syncx Start amp Stop the measurement Page 11 In this example the instrument is set to Broadband Measurement Mode In this example the instrument is set to 1 1 Octave Band Measurement Mode In this example the instrument is set to 1 1 Octave Band Measurement Mode To start the measurement press the Start Key Key Press MAI Display 59 8 LAeqt MI sa Running LAF Elapsed 00 08 23 Comments Press the Up and Down arrow keys to view the measurement functions during the measurement To stop the measurement press the Stop Key Key Press Display Mem 10 Broadband 00 15 00 53 5 dB 95 0 dB 82 9 Elapsed LAegt LCpeak LAE 30 06 07 LLE Comments The instrument stores the measurement in memory and enters the measurement review mode Page 12 CR 800C Series Sound Level Meter User Manual Review the measureme
22. required by the standards to which the instrument is designed to meet there is a minimum time required to measure each frequency band Therefore the CR 800C enforces a minimum measurement duration of 1 minute for the 1 1 Octave Band Mode and 3 minutes for the 1 3 Octave Band Mode Page 20 Measurement Auto Repeat Key Press Display Cirrus CR 800C A A 23 11 07 14 56 01 CR 800C Main Menu Menu u Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode v 00 15 00 Repy SyncJ Measurement Auto Synchronise Key Press Display Cirrus CR 800C AE A A 23 11 07 14 56 01 CR 800C Main Menu Menu a aE Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode v RepY SyncyY 00 15 00 CR 800C Series Sound Level Meter User Manual Comments The status of the Auto Repeat is shown at the bottom of the screen In this example the Auto Repeat is switched on When the Auto Repeat is switched off the display is Repx Comments The status of the Auto Synchronise is shown at the bottom of the screen In this example the Auto Synchronise is switched on When the Auto Synchronise is switched off the display is Syncx Configuring the instrument from the Deaf Defier3 software The entire configuration of the instrument can be set from the Deaf Defier3 software using the Advanced Configuration option CR 800C Series Sound Level Meter User Manual 3 8 Calibration Pag
23. 14 07 07 15325203 Comments The current time and date are shown at the bottom of the screen Comments The current measurement range is shown highlighted Use the Up and Down Arrows to select the required range Press the OK key to change the range or Exit to discard The bar at the top of the screen shows the noise level in proportion to the measurement range CR 800C Series Sound Level Meter User Manual Page 19 Measurement Mode Key Press Display Comments Cirrus CR 800C T gt cc E Li 23 11 07 14 56 01 CR 800C Main Menu The current measurement mode is Menu A gt TA shown on the screen Calibrate Broadband Mode V In this example the measurement 1 1 Octave Mode mode is Broadband 1 3 Octave Mode Repx Yy Syncx 00 30 00 Measurement Duration Key Press Display Comments Cirrus CR 800C AA CD gt 23 11 07 14 56 01 CR 800C Main Menu The measurement duration is Menu SS shown at the bottom of the Calibrate screen Broadband Mode V 1 1 Octave Mode In this example the measurement 1 3 Octave Mode time is 15 minutes v Repy SyncyY 00 15 00 When the instrument is set to either 1 1 or 1 3 Octave Band Mode the Run Duration is divided between the frequency bands For example if the measurement duration is set to 15 minutes the CR 800C instrument will take a total of 15 minutes to complete the sweep through the frequency bands To meet the accuracy
24. 6 07 Mem 12 Octave Band 25 Hz 78 31 5 Hz 84 40 Hz ASA 50 Hz 80 30 06 07 Ils Display Mem 12 16 kHz 3 AB dB dB dB 30 06 07 11 12 07 Octave Band 11 12 07 v 5 2 Checking amp Clearing the memory Page 45 Page 46 CR 800C Series Sound Level Meter User Manual The memory of the instrument can be checked for available space and also to allow the user to delete the measurements that are stored To check the available memory select the Memory option from the menu Key Press Display Comments CR 800C Main Menu Menu A Run Durations gt Setup P Print Options y Repx Syncx 00 30 00 Memor OK O Y r Available Memory Clear Memory gt eee eID f Repx Syncx 00 30 00 Memory This screen shows the amount of OK q memory free for the main Measurement measurement store and the time 99 Free history store Time History 63 Free v Repx Syncx 00 30 00 To clear all the measurements from the memory use the Clear Memory option Key Press Display Comments OK Memory Available Memory Clear Memory Vv Repx Syncx 00 30 00 OK Memory Confirm with OK Repx Syncx 00 30 00 CR 800C Series Sound Level Meter User Manual Page 47 Memory OK Memory Cleared Press Exit Key Repx Syncx 00 30 00 Exit Please note that when the memory has been cleared any measurement previously stored cannot be retrieved and are permanently deleted Page 48 CR 800C Series So
25. Applicable Standards Sound Level Meter IEC 61672 1 2002 Class 1 or 2 Group X IEC 60651 1979 Class 1 I or Class 2 I IEC 60804 1985 Class 1 or Class 2 ANSI S1 4 with NK 70 Random Incidence Adaptor Fitted 1 1 amp 1 3 Octave Band Filters where fitted IEC 61260 Class 1 9 3 Microphone Class 1 MK 224 pre polarized Free field 1 2 Condenser Class 2 MK 216 pre polarized Free field 12 Condenser Random Incidence to ANSI S1 4 with NK 70 Adaptor Capacitance 18pF 9 4 Microphone Preamplifier Class 1 MV 200D Removable Preamplifier Class 2 MV 200D Integral Preamplifier 9 5 Extension cables ZL 202 2m ZL 205 5m ZL 210 10m ZL 215 15m ZL 220 20m ZL 225 25m 9 6 Time Weightings FY Fast to IEC 61672 1 2002 Class 1 or 2 Group X S Slow to IEC 61672 1 2002 Class 1 or 2 Group X I Impulse to IEC 61672 1 2002 Class 1 or 2 Group X 9 7 Frequency Weightings Channel 1 A C or Z Channel 2 C for Peak Z weighting is a flat frequency response of 8Hz 20kHz 1 5dB excluding microphone response When either 1 1 or 1 3 Octave Band filters are selected the Z weighting is used CR 800C Series Sound Level Meter User Manual Page 59 9 8 Amplitude Weighting Q 3 True Energy Integration 9 9 Measurement Range Broadband 21dB A to 140dB A Class 1 25dB A to 140dB A Class 2 143dB C Peak 70 to 140dB Range 1 1 Octave Band Filters 19dB Z to 140dB Z 1 3 Octave Band Filters 14dB Z to 140dB Z
26. CR 800C Series Sound Level Meter User Manual Page 1 User Manual for the CR 800C Series of Sound Level Meters Cirrus Research plc This manual the software to which it relates the program code and drawings are all Copyright Cirrus Research plc 1989 2008 Page 2 CR 800C Series Sound Level Meter User Manual The content of this manual any illustrations technical information and descriptions within this document were correct at the time of going to print Cirrus Research plc reserves the right to make any changes necessary without notice in line with the policy of continuing product development and improvement No part of this publication may be duplicated reprinted stored in a data processing system or transmitted by electronic mechanical photographic or other means or recorded translated edited abridged or expanded without the prior written consent of Cirrus Research plc No liability is accepted for any inaccuracies or omissions in this manual although due care has been taken to ensure that is it complete and accurate as possible Accessories supplied by Cirrus Research plc have been designed for use with the instrumentation manufactured by Cirrus Research plc No responsibility is accepted for damage caused by the use of any other parts or accessories In order to take account of a policy of continual development Cirrus Research plc reserves the right to change any of the information contained in this publication wit
27. EC 60942 2003 Class 2 O K Kd Ge S Y A os a NC Y Ayeg ae 604 NN16 e ES Power Indicator The calibrator will automatically switch off after 5 minutes to preserve battery power To switch off the calibrator manually press 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 on mode Press the power button to switch off the calibrator CR 800C Series Sound Level Meter User Manual Page 63 Calibrating a Sound Level Meter Push the microphone of the Sound Level Meter 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 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 Most modern Sound Level Meters have electronic calibration with the level adjusted automatically Adjust the Sound Level Meter to the correct level where applicable When correcting the value generated by the calibrator a correction for the type of microphone capsule may need to be appli
28. a mada ee er eav narod RENERE Pian sid Vekeua wad vale age EENE AAA OORE 21 3 9 Starting a Measures A a 22 3 10 Displaying the data during a measurement cee cece cece eee eee eee eee eee eee eens eae eae es 24 3 11 Pausing and Resetting a MEASUrEMENL cece eee eee eee eee eee ee eee eee tenet neta une 25 3 12 Stopping the MEASUrEMENE ccceeccecee eee eee nee EEE EEE Ea rr rr 25 3 13 Viewing the stored MeEaSUrEMENtS ccc cee cece eee eee eee enn eet en eens ete ened 26 4 Configuring the Sound Level Meter c cccscsseeceeececeescescesseeeeeceeeeeeeeeeeeeeseeneeaeeeenaneaaes 27 Cl A iiaiai aia einn E ae Seed Heed ee eas A Eee a eta eee aa ee aia tea oe 27 4 2 Menu Syste eoseid iea A da 27 4 3 Measurement Moder rna a aa E Oa R TE E DEAE rr 28 4 4 Measurement Dura A aeveieeesenbug EEN Senseeue evan NENIEN ONKA 30 4 9 Measurement AUtO REDEA ienn oant cote endnn rece A a eat cee E DE anaes 31 4 6 Measurement Auto SYNCHIONISE 0 cece EEE EEE EEE EEE EE EES 33 4 7 Measurement Range ii id 34 4 8 Instrument SU Puerco a A dd 36 5 Viewing and Downloading the measurements cccccoconconconconconcnncnncnncnnnnnnnnnnnnnnnnnnnnnnns 43 5 1 Recalling Stored Measurements 0occcoccoccnnonconncncconcnnnnnnnrnnnnnnnnrnrnnr nee ee tenet eee tas 43 5 2 Checking amp Clearing the Memory eceece eee ee eee eee nena nee een eas 45 5 3 Downloading Measurements to the Software cecceeeeee eee ee ee eee teeta eee teste ea
29. al Run Duration The Run Duration has been set to the User Defined value Select the Manual Run Duration The measurement does not stop as expected The Run Duration has been set to Manual Select a preset Run Duration 7 4 Downloading Measurements Symptom Possible Cause Possible Remedy Measurements cannot be downloaded No measurements have been stored Repeat Measurement Instrument is not connected to PC Connect the USB Cable and retry Batteries are too low Replace batteries CR 800C Series Sound Level Meter User Manual 8 Glossary 1 1 Octave Band Filters 1 3 Octave Band Filters A Weighting Acoustic Calibrator Broadband C Weighting CE Marking dB A dB C dB Z Decibel dB DIN 45641 Fast Time Weighting IEC 60651 1979 IEC 60804 1984 IEC 61260 1995 IEC 61672 1 2003 Impulse Time Weighting Integrating Averaging Sound Level Meter Laio o Lago o Lae Laeg t Lar Larmax LaFmin LarTeg Lar Latmax Page 55 A division of the frequency range into bands the upper frequency limit of each band being twice the lower frequency limit Single 1 1 Octave bands divided into three parts A standard weighting of the audible frequencies designed to reflect the response of the human ear to noise An instrument that provides a reference noise source that is used to calibrate and check the performance of a Sound Level
30. bol in the top right corner as shown below Windshield The CR 800C Series can be used with a UA 237 90mm foam windshield which will reduce the noise levels generated by air turbulence over the microphone capsule The windshield can also be used to protect the microphone capsule of the sound level meter from dust and fluids which may affect the performance of the instrument To use the UA 237 windshield push the hole in the windshield over the microphone of the sound level meter The UA 237 windshield must be removed before the sound level meter can be calibrated NK 70 Random Incidence Adaptor The NK 70 Random Incidence Adaptor is designed to modify the response of the microphone capsule from Free Field to Random Incidence in order to comply with the requirements of ANSI 1 4 For instruments supplied for use outside of the USA this adaptor may not be supplied To fit the NK 70 Random Incidence Adaptor push the adaptor over the microphone grill Do not attempt to remove the microphone grill as this may cause damage to the capsule To calibrate the instrument remove the NK 70 Adaptor Do Not attempt to calibrate the instrument with the NK 70 fitted CR 800C Series Sound Level Meter User Manual Page 17 3 6 Switching On Key Press Display 2 J Cirrus Far Research plc CR 800C 03 01 dB 23 11 07 14 56 01 When the instrument is first switched on a Welco
31. d MK 216 Microphone capsules used by the CR 800C Series To adjust the calibration level select the Cal Level option from the setup menu Key Press Display Setup LT Contrast Set Clock gt Cal Level Resolution gt v Repx Syncx 00 30 00 Setup Cal Level 093 7 Comments Use the Up and Down arrows to adjust the level and the Left and Right arrow keys to move between the numbers Press OK to accept the calibration level Repx Syncx 00 30 00 Cirrus Research plc does not recommend the use of Acoustic Calibrators other than those manufactured or supplied by Cirrus Research plc for use with the CR 800C instruments Display Resolution The display resolution of the CR 800C instruments can be set to be either 0 1dB or 0 01dB For most applications the 0 1dB resolution is suitable Key Press Display Comments Setup Contrast Set Clock gt Cal Level Resolution gt Repx v 00 30 00 Syncx Use the Up and Down arrows keys to select the display resolution and press OK to select the required display resolution OK Resolution High Norm 000 00 000 0 Y Press Exit to return to the main display Repx Syncx 00 30 00 Time Weighting The Time Weighting of the instrument can be set to either Fast Slow or Impulse To set the Time Weighting select the Time Weighting option from the menu CR 800C Series Sound Level Meter User Manual Page 39 Key Press D
32. d Mode the instrument stores the overall values such as Lyeg Larmax and Ln s as well as storing a noise profile or Time History during each measurement The CR 800C instruments can store up to 1 300 Broadband Measurements which can be of any length up to a maximum of 99 hours per measurement With each measurement is stored a noise profile which consists of 1 second Leq samples with up to a maximum of 11 days of Noise Profile being available Frequency Displayed Maximum Minimum Function Weighting as value value A L L Larmi Sound Level with Fast E T TAN o Time Weighting CF CFmax CFmin Z LzF LzFmax Lzfmin A Liar Sound Level with Slow E cas asmax E Time Weighting CS CSmax CSmin Z Lzs Lzsmax Lzsmin A L L Latmi Sound Level with Impulse T ee ae Time Weighting CI CImax CImin Z Lz Lz1max Lz min Equivalent Continuous A Laegt Sound Pressure Level with C Lcegt integration time t Z Lzeat z A Lae 7 Sound Exposure Level SEL Loe Z Lze Peak Sound Pressure C LCpeak Takt Maximum Sound Level DIN 45641 Larteq g eed Impulse Weighted A LAlegt Equivalent Sounds Press C LCIeqt Level with integration time t Liegt Z LZIeqt Please note that only one Frequency Weighting can be selected at any time CR 800C Series Sound Level Meter User Manual Page 7 2 4 1 1 amp 1 3 Octave Band Measurement Mode If the instrument
33. e 21 If a microphone extension cable is to be used during a measurement the instrument must be calibrated with the cable attached Attach the acoustic calibrator to the sound level meter and press the menu key The first menu option is Calibrate Key Press Display CR 800C Main Menu Menu aE Calibrate Broadband Mode JV 1 1 Octave Mode 1 3 Octave Mode v 00 15 00 Repy Syncy CR 800C Main Menu ou Calibrating Please wait CR 800C Main Menu Calibrated to 93 7 dBA Press Exit Key Comments Select 94dB on the Acoustic Calibrator before starting the calibration procedure If the calibration is sucessful the instrument will display the calibration information screen Press Exit to return to the main screen If the instrument cannot calibrate successfully the display will show an error CR 800C Main Menu Too Low Not Calibrated Press Exit Key CR 800C Main Menu O TT Too High Not Calibrated Press Exit Key The calibration level is too low The Calibrator may not be switched on or may not be functioning correctly The calibration level is too high Check that the calibration level on the Acoustic Calibrator is set to the correct level The default level is 94dB Page 22 CR 800C Series Sound Level Meter User Manual CR 800C Main Menu The calibration level is unstable gt The background noise level may Unstable be too high or the acoustic Not
34. e eae ees 48 5 4 Software Installation a e a rN IU UU EE rr rr rr 48 5 5 System REQUIFEMENtS uces raie A dante A A Saeed Nadas eae PE hea een aed 48 5 6 Installation Requirements 0 UU EE EEE EERE EERE EEE 48 5 7 Connecting the instrument to the PC ccc cece cece eee eee eee ene eee teas 49 5 8 Understanding how the measurements are stored cecceeceeee eee eee eee eee eee e nate neta neen ae ees 50 6 Maintenance amp Care scccccccccccencecceneeneeneeeeeeeeeeeeeeeeeaeeeeeeeeeneeeeeeeeeeaeeaeeeeeeeeneeneeaenaneaneas 52 7 TrOUDlIESHOOUNG a ccccocincconancina od A anain eoru kanaa Eigb Nikaian E uNa 53 Teds BASICS A A A AAA A ea AAAS A 53 7 2 Calibration ii aioe dd casas ete elas A AAA A ED EA EATA A ai 53 7 3 Measurements 8e Settings a 54 7 4 Downloading Measurement irs meircii oranini enina ninaa eee AVN a Nanai 54 8 GlOSSALY A E E E E E E 55 9 Appendix 1 SpecificatiONS oococcccccnconconcnncnncnncnnnnnnnnnrnnrnn ranma 58 9 1 Instrument VErslONS oeri error eniai s irrien da a EREA ania dais case 58 9 2 Applicable Standards cirio riot A A A bea TEENE Ec 58 OFS MICA Ea RS AR e AGAR 58 9 4 Microphone Preamplifier o ooococccocccccccnncnnnn cnn nn rrrrrr rr rr rr rr rr rr 58 9 5 EXtension aple Sperneier A AA A dede 58 9 6 TIMES WeI NNG S id a a ica 58 Page 4 CR 800C Series Sound Level Meter User Manual 9 7 Frequency WeIQhtiNgS immerito rna Ad ad 58 9 8 Amplitude Weighting cooccoccoccnconccnccnncnnnnnnncnnnrnnn rn nr r
35. e sound pressure at any instant during a measurement period in dB usually with C frequency weighting Sound Exposure Level displayed as Lag Lce or Lze A standard time weighting applied by the Sound Level Meter CR 800C Series Sound Level Meter User Manual Page 57 Sound Level Sound Pressure Level with a Frequency weighting such as dB A Sound Level Meter An instrument for measuring various noise parameters SPL Sound Pressure Level the basic measure of noise loudness expressed in decibels Statistical Analysis A calculation performed by a Sound Level Meter on the noise levels measured during the measurement period to describe the statistical spread of the noise Time History A sample of the noise levels taken every 1 second throughout the measurement period Class 1 Laboratory amp Field Grade for Sound Level Meters Class 2 General Field Grade for Sound Level Meter Under Range The input to the Sound Level Meter is too low for the current measurement range Change the range Z Weighting Z weighting is a flat frequency response of 8Hz 20kHz 1 5dB excluding microphone response Page 58 CR 800C Series Sound Level Meter User Manual 9 Appendix 1 Specifications 9 1 Instrument Versions CR 811C Class 1 CR 812C Class 2 CR 821C Class 1 with 1 1 Octave Band Filters CR 822C Class 2 with 1 1 Octave Band Filters CR 831C Class 1 with 1 1 amp 1 3 Octave Band Filters CR 832C Class 2 with 1 1 amp 1 3 Octave Band Filters 9 2
36. ed see Appendix 2 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 Page 64 CR 800C Series Sound Level Meter User Manual 10 2 Changing the Battery The CR 514 amp CR 515 acoustic calibrators use a single 9v alkaline battery This type of battery is known as 6F22 or NEDA 1604 It is also commonly known as PP3 a Unscrew the screw holding the battery cover on using a coin 2 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 Ensure that the battery is inserted with the correct polarity with the negative terminal at the contact with the larger cutout Battery Cover Retaining Screw Battery Battery type The battery should be an alkaline battery not an ordinary dry cell The battery is 9 volts when new and will operate the calibrator down to 6 4 volts When the battery voltage is below 6 6 volts but above 6 4 volts the power LED will flash 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 allo
37. en accumulated to give an accurate measurement Page 24 Key Press Display Elapsed 00 01 00 CR 800C Series Sound Level Meter User Manual Comments The instrument has not accumulated sufficient data to give an accurate measurement When enough information has been gathered the LZeq value will be displayed 3 10 Displaying the data during a measurement Broadband Mode During a Broadband Mode measurement the user can step through the different measurement parameters All of the functions are measured simultaneously and are automatically stored Please note that this function is only available in Broadband Mode Key Press Display Elapsed 00 08 23 59 8 pE E LCPeak 1 iL tle gt lt gt Elapsed 00 08 23 59 8 Display Running LAF Display Running LAF q mm TAFmax Mt ile am o om Elapsed 00 08 23 Display Elapsed 00 08 23 Comments The instrument starts with the LAeq t value and the Elapsed Time The Sound Level in this case LAF is shown in the top right hand corner of the screen The Peak C value is shown The Maximum Sound Level LAFmax in this example is shown The Sound Exposure Level or LAE is shown If the User Metric is configured for either the LAFTeq or LIeq t functions these will be shown instead of the LAE value CR 800C Series Sound Level Meter User Manual Page 25 Display Running i The Sound Level is shown in th
38. f OK Exit RepJ SyncJ 00 30 00 When the Auto Synchronise function has been selected the display will show the Sync at the bottom of the screen with a tick next to it as shown above 4 7 Measurement Range One of the most important features of a Sound Level Meter is the measurement range If the measurement range is set too high the instrument may not be able to record low levels If the measurement range is set too low high noise levels will overload the instrument and make the measurement invalid Therefore it is vital that the correct measurement range is chosen for the noise to be recorded To check the current measurement range press the Range key Key Press Display Comments Cirrus CR 800C 23 11 07 14 56 01 Range The current measurement range is Range 4 40dB to 110dB 70dB to 60dB to 50dB to 140a1 B 130dB 120dB 40dB to 110dB 14 07 07 v 15 25 03 The measurement range in this example is 40dB to 110dB If the noise level is below 40dB the instrument will indicate Under Range If the noise level is above 110dB the instrument will indicate Overload CR 800C Series Sound Level Meter User Manual Page 35 Display Comments Range y i The measurement range is 40dB to 110dB and the noise level is 40dB to 120 6dB 30dB to 100dB l l 20dB to 90dB The instrument is overloading and the O L symbol is shown v 14 07 07 15 25 03 Range i The measurement range is 70dB
39. faults on the instrument except the microphone and the display for the period defined in para 4 below including minor accidental damage except to the microphone or display 4 In common with almost all acoustic manufacturers Cirrus Research plc do not give a warranty on the microphone or display normally an LCD because of their fragile nature 5 The period of the warranty is 2 two years or 104 weeks from the date of purchase as a new instrument from Cirrus Research plc or their formally approved distributors OR 130 weeks from the date the instrument passed its final manufacturing inspection at Cirrus Research plc whichever is the shorter 6 Any rechargeable battery only has the battery manufacturer s one year warranty 7 No warranty is offered for used equipment unless a special arrangement is made and a written confirmation of the warranty is given by Cirrus Research plc 8 The warranty becomes void if the instrument is not returned for calibration within 18 months or 78 weeks of purchase In the International Standard IEC 61672 this calibration is described as Routine Verification and it is required to ensure that any acoustic instrument measures correctly 9 On completion of the Routine Verification by Cirrus Research plc the instrument will automatically be given an additional free one year warranty 10 There will be a charge for this routine verification and the price is published in the Service Price
40. gt dB 23 11 07 14 56 01 CR 800C Series Sound Level Meter User Manual 1 1 Octave Band Mode To select the 1 1 Octave Band Measurement Mode Key Press Display Display CR 800C Main Menu ST Calibrate OK Broadband Mode 1 1 Octave Mode Y 1 3 Octave Mode v Repx Syncx 00 30 00 E Cirrus CR 800C Ac A EAS 31 5Hz m mT we 1 1 Oct LZeqt lt lt p e dB 23 11 07 14 56 01 1 3 Octave Band Mode To select the 1 3 Octave Band Measurement Mode Key Press Display Display CR 800C Main Menu ST Calibrate OK Broadband Mode 1 1 Octave Mode 1 3 Octave Mode y Repx Syncx 00 30 00 Exit Cirrus CR 800C E E E e E dB 23 11 07 14 56 01 Page 29 Page 30 CR 800C Series Sound Level Meter User Manual 4 4 Measurement Duration The configuration of the Run Duration the Auto Repeat and the Auto Synchronise functions are all connected and affect each other Always ensure that the status of these three functions is checked before making a measurement When the menu key is pressed the display shows the status of these functions as shown below CR 800C Main Menu I Calibrate Broadband Mode y 1 1 Octave Mode 1 3 Octave Mode vy RepyY SyncyY 00 15 00 Rep Sync 00 15 00 To change the measurement duration of the instrument Key Press Display CR 800C Main Menu S i E Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode Menu V
41. h may cause damage to the components of the unit If the instrument is to be used in an environment where particles such as dust may come into contact with the instrument always use a Windshield UA 237 to protect the microphone capsule The CR 800C is not waterproof and should not be used in situations where moisture will form or condense on the microphone capsule or the instrument body If using the CR 800C outdoor use a suitable outdoor measurement kit which has been specifically designed to protect the instrument If the CR 800C becomes dusty wipe it down with a cloth that is lightly dampened with water or a mild detergent Do not use aromatic hydrocarbons chlorinated solvents or methanol based fluids when wiping down the meter Do not clean the microphone capsule Do not remove the microphone grill as this can cause severe damage to the membrane Physical damage to the microphone capsule is not covered by the instrument warranty If you experience any problems with the operation of the instrument refer to page 53 for basic troubleshooting If this does not solve the problem contact Cirrus Research plc or your local representative for further assistance CR 800C Series Sound Level Meter User Manual 7 Troubleshooting Page 53 This section contains information which may solve simple operational problems you may encounter If you are unable to solve the problem or experience any problems with the assembly or operation of the instr
42. hout prior notice Produced by Cirrus Research plc Acoustic House Bridlington Road Hunmanby North Yorkshire YO14 OPH United Kingdom Copyright Cirrus Research plc 2008 Reference Number 07 11 CR 800C 01 Document Printing Date Monday 11 February 2008 CR 800C Series Sound Level Meter User Manual Page 3 DL PROTAGC viicctiudetestisdscactevectectaudetastadoatectausstestascstusteseciusavsstesadssstusadusstuutasesausaeveutsctausstuses 5 t1 Messages and Symbol Skrite A AA A a AAA ands ed eae A chance die oed 5 2 UNCFOGDUCTION cui Ri 6 2 1 Main Features iii evita A A pW eins A desea caw aed nae aaa 6 22 Measurement FUNCTIONS sis assets tada 6 2 3 Broadband Measurement Mode 2 ccc cc ce EEE EEE EEE EERE EEE 6 2 4 1 1 8 1 3 Octave Band Measurement Mode c 0ccocccocconnconnonnnan anar nnanrrnnrrn EE REE rE Ee 7 2 5 Options amp ACCESSOMIES rio esis Geis kd ices bn ae leis 7 3 Getting Started recesscicciscicedecssiaecasudedwceuscntucecssedessescsausacsscaudseusseusegecutesccteetscccassuvasveureens 8 Sil HOW CO ies eevccutisaudeeinaesa ities AAN aaleea arson gina NEA TERE O AR ERNAS 8 3 2 QUICK Sii A ieee A A caliente 9 3 3 Unpacking and checking the Sound Level Meter ooocoococcnccncconcnnnncnncnnnnnnrnnrnnnnrnnnannnnnes 13 34 Instruments LAU A A a dd dla de 14 3 9 ASSEMDIV iii caes 15 326 SWICENING OA a e 17 3 7 Checking the Configuration of the Instrument sssssssssrrrrsesrrrrnseurrrrnueurrnnnnsrerrnnrnrns 18 A N oiee fees ees ein
43. is o case the LAF DREE a o lt A gt Elapsed 00 08 23 Display LAF 59 8 Bh The real time display of the noise eee level is shown as 1 second Leq samples The display shows 2 minutes of information and then starts to scroll across the screen Elapsed 00 08 23 3 11 Pausing and Resetting a measurement During a measurement the user can pause the measurement by pressing the Start Pause key Key Press Display Comments MAI Elapsed 00 08 23 To restart the measurement press the Start Pause key again When a Broadband measurement is paused the collection of data for the overall parameters such a the Leq is paused However the Time History measurement continues and the instrument codes this data When the information is downloaded to the Deaf Defier3 software the user can see when the measurement was paused Information recorded by the Time History store when the instrument is in pause mode is not used in the calculation of the overall parameters The user can reset and discard the current measurement when the instrument is running by pressing the Reset key This will delete the current measurement information and restart the measurement 3 12 Stopping the measurement At any time during a measurement the user can stop the measurement The data will be automatically stored in memory and the display will change to the memory review mode Page 26 CR 800C Series Sound Level Meter User Manual Key P
44. isplay Comments Setup TTT ZT Frequency Weighting P Change Ln Vales User Metric gt M Repx Syncx 00 30 00 Time Weighting Select the required Time I EEr Weighting and press OK to select Slow The currently selected Time Impulse Weighting is indicated by a tick OK Press Exit to return to the main Repx Syncx 00 30 00 display The Time Weighting applies to the following parameters Broadband Mode Lar Las Lar Lcr Les Lcr Lzr Lzs or Lz not stored LaFmax Lasmax Latmaxy LcFmax Lcsmax Lcimaxs LzFmax Lzsmax or Lz max Larmins Lasmins Latmins LcFmin Losmins LcImin LzFmin Lzsmin or Lz min Lo 1 to Loo 9 five simultaneous user selected values available The L s or Statistical parameters are calculated from Sound Level Therefore if the Time Weighting is set to Fast the L s will be calculated from Lar 1 1 Octave Band Mode Filtered Lzs Lzf or Lz1 not stored 1 3 Octave Band Mode Filtered Lzs Lzf or Lz1 not stored Frequency Weighting The Frequency Weighting of the instrument can be set to either A C or Z To set the Frequency Weighting select the required option from the menu Key Press Display Comments Page 40 CR 800C Series Sound Level Meter User Manual Setup ST Time Weighting gt Frequency Weighting Change Ln Vales User Metric gt y Repx Syncx 00 30 00 Freq Weighting Select the required Frequency a ee Weighting and press OK to select
45. lease note that this function only operates in the Broadband Measurement Auto Repeat is not available during 1 1 or 1 3 Octave Band Mode Page 32 CR 800C Series Sound Level Meter User Manual With the Auto Repeat function enabled the instrument will make further 15 minute measurements one after the next until the total number of measurements has been made This allows the user to tell the instrument for example to make 96 individual 15 minute measurements over a 24 hour period To configure the Auto Repeat function enter the menu and select the Measurement Duration option and then select the Auto Repeat option Key Press Display Run Duration OK I User Defined Set User Time gt Auto Repeat gt Synchronise D gt v Repx Syncx 00 30 00 OK Auto Repeat Off Set Number gt Rep Sync 00 30 00 Use the up and down arrows to change the number of measurements required and the left and right arrows to move between the digits Press OK to accept the changes or Exit to discard any changes made Auto Repeat Set Number Eloo Repx Syncx 00 30 00 CR 800C Series Sound Level Meter User Manual Page 33 4 6 Measurement Auto Synchronise This function allows the start of the measurements to be started in time with the clock of the instrument The diagram below shows how the measurement runs from when the Start key is pressed for the duration defined by the Run Duration when the auto repeat
46. manby North Yorkshire United Kingdom YO14 OPH Telephone Fax e mail Technical Support Web Site Germany Cirrus Research Buro Dresden Karl Marx Str 11a D 01109 Dresden Germany Telephone Fax e mail Website France Cirrus France Ltd 7 Rue Haute 11230 Caudeval France Telephone Fax Email Web 01723 891655 01723 891742 sales cirrusresearch co uk support cirrusresearch co uk www cirrusresearch co uk 49 351 316 0950 49 351 316 0949 verteib cirrusresearch de www cirrusresearch de 33 468 692 091 33 468 692 091 sales cirrusresearch fr www cirrusresearch fr
47. me screen is shown with the instrument type and version number After 3 seconds the display will change and the current Sound Level will be shown with the current configuration shown as above In this example the instrument is showing the Fast A Weighted Sound Level with the current date and time shown at the bottom of the screen The battery level is shown in the top right hand corner of the display Across the top of the display above the numbers is shown the sound level as a bar graph This graph is scaled with the current measurement range The display will also show when the instrument is in Overload or Under Range The Glossary on page 55 also describes the indication of Overload and Under Range Cirrus CR 800C Cirrus CR 800C Cirrus CR 800C TT 23 11 07 14 56 01 23 11 07 14 56 01 23 11 07 14 56 01 Low Battery Level Overload Under Range Page 18 CR 800C Series Sound Level Meter User Manual 3 7 Checking the Configuration of the Instrument The Setup of the instrument should be checked before making a measurement Time and Date Key Press Display Cirrus CR 800C gt E lt Q MM dB 23 11 07 14 56 01 Measurement Range Key Press Display Cirrus CR 800C gt _ gt lito 23 11 07 14 56 01 LAF Range Range 90 6 70dB to 140dB 60dB to 130dB 50dB to 120dB 40dB to 110dB 14 07 07 15 25 03 Range 70dB to 60dB to 130dB 50dB to 120dB 40dB to 110dB 140dB vy
48. mple broadband mode allows 12 days of 15 minute measurements to be stored Calibration records are automatically stored in the instrument memory Noise Profile Short Leq Laeq Lceg OF Lzeq Up to 11 days at 1 second acquisition 9 14 Automatic Measurements The unit can be set to record and store data over fixed times of 1 minute 5 minutes 10 minutes 15 minutes 30 minutes 1 hour 8 hours 12 hours or a user defined period Automatic Repeat From 2 to 999 measurements broadband mode only Auto synchronise to the clock 9 15 Display Matrix LCD with backlight amp Quasi Analogue Bar Graph Selected measurement parameter with level Warnings for Overload Under Range and Low Battery Time amp Frequency Weighting Elapsed measurement time Real time short Leq broadband mode Graphical 1 1 and 1 3 Octave Band recall mode only Recalled stored measurements Measurement Range 9 16 Weight 450 gms 9 17 Dimensions 340mm x 75mm x 25mm 9 18 Batteries 2 x 1 5v Alkaline LR6 AA CR 800C Series Sound Level Meter User Manual Page 61 9 19 Battery Life Broadband Typically gt 30 hours Filter Mode Typically gt 20 hours Battery voltage is continuously monitored and warning is given on display of impending low battery condition When batteries approach end of life the unit will store any data required and switch off automatically 9 20 Environmental Temperature Operating 10 C to 50 C Storage 20 C to 60 C Humidity
49. n cable if the instrument is fitted with the removable preamplifier If a microphone extension cable is to be used during a measurement the instrument must be calibrated with the cable attached Connect the microphone extension cable in the same manner as the MV 200D Preamplifier Batteries The batteries of the CR 800C are located behind the cover on the bottom of the instrument Slide the cover to the right hand side to remove and to access the battery holder Ensure the instrument is switched off Remove the battery holder from the instrument and insert the batteries The CR 800C instruments uses two AA type batteries also known as LR6 USB Socket Battery Holder Multi I O Socket YN Ensure that the batteries are inserted correctly DO NOT reverse the polarity A of the batteries as this may cause damage to the instrument Page 16 CR 800C Series Sound Level Meter User Manual Using an external power supply The CR 800C can be used with an external power supply When the Cirrus CR 800C external supply is connected the A E CR 800C switches automatically from the B E C internal battery power FA A When the external power is either la a s Va LAF removed or switched off the instrument dB will automatically switch back to the 23 11 07 14 56 01 internal battery supply When an external supply is connected the display of the instrument will show a sym
50. nnncnnanennaneananess 69 13 Cirrus Research OFFICES cai ida 70 CR 800C Series Sound Level Meter User Manual Page 5 1 Preface Thank you for purchasing this CR 800C Series Sound Level Meter from Cirrus Research plc This powerful instrument provides excellent expansion capability and has been designed to provide reliable accurate measurements over a long period of time This manual describes the procedure that should be followed to set up and operate the CR 800C Sound Level Meter including comprehensive technical information using the optional accessories as well as a troubleshooting guide This manual also contains the information regarding the CR 514 and CR 515 Acoustic Calibrators If you are a new user of Sound Level Meters or new to the CR 800C Sound Level Meter first read Section 1 Introduction to familiarise yourself with the features components and accessories supplied Then read Section 2 Getting Started for step by step instructions on how to use the instrument The different versions of the CR 800C are CR 811C Class 1 Broadband Only CR 812C Class 2 Broadband Only CR 821C Class 1 Broadband with 1 1 Octave Band Filters CR 822C Class 2 Broadband with 1 1 Octave Band Filters CR 831C Class 1 Broadband with 1 1 amp 1 3 Octave Band Filters CR 832C Class 2 Broadband with 1 1 amp 1 3 Octave Band Filters The CR 800C Sound Level Meters meet the requirements for Class 1 and Class 2 of IEC 61672 1 2002 standard for Clas
51. nt When the measurement has been stopped the instrument automatically stores the measurement in memory and enters the measurement review mode Use the Up and Down arrow keys to view the different measurement values and press the exit key to return to the main display CR 800C Series Sound Level Meter User Manual Page 13 3 3 Unpacking and checking the Sound Level Meter Carefully remove the instrument from its shipping container and inspect it for possible damage or missing items If the meter appears to be damaged or something is missing contact Cirrus Research plc or your local representative immediately The basic CR 800C instrument is supplied with the following standard accessories Deaf Defier3 for Windows Software on CD ROM CR 800C User Manual Certificates of Calibration ZL 100 USB Data Cable Batteries 2 x AA In addition the Class 1 versions of the instrument are supplied with an MV 200D Preamplifier and a microphone box If you have ordered the instrument as a complete measurement kit you will have also received some further items such as an Acoustic Calibrator Carrying Case and Windshield Page 14 CR 800C Series Sound Level Meter User Manual 3 4 Instruments Layout Information Label Tripod Mount Ta Microphone Capsule USB Socket Multi I O Socket Battery Holder E Cirrus
52. o exit from the Contrast menu Repx Syncx 00 30 00 CR 800C Series Sound Level Meter User Manual Time amp Date Page 37 To change the Date and Time select the Set Clock option from the Setup Menu Key Press Display Setup Contrast gt Set Clock gt Cal Level Resolution gt Repx Syncx 00 30 00 Set Clock OK Time Date Repx Syncx 00 30 00 Set Clock Time 00 01 00 hh mm ss 00 30 00 Repx Syncx Set Clock OK Time Repx Syncx 00 30 00 Set Clock Date 23 11 07 dd mm yy Repx Syncx 00 30 00 Calibration Level Comments To set the time select the time option and press OK Use the Up and Down arrow keys to change the numbers and the left and right arrow keys to move between the numbers Press the OK key when the Time is correctly set To set the date select the date option and press OK Use the Up and Down arrow keys to change the numbers and the left and right arrow keys to move between the numbers Press the OK key when the Time is correctly set The level at which the CR 800C instrument calibrates can be adjusted if required to suit different Acoustic Calibrators The default calibration level is 93 7dB for use with Cirrus Research plc CR 515 or CR 514 Series Acoustic Calibrators set to the 94dB setting The correction of 0 3dB is Page 38 CR 800C Series Sound Level Meter User Manual required to suit the MK 224 an
53. o stored a Time History measurement This information is stored in a separate memory from the Events and does not take up any of the 1 300 Event memories However the Time History memory is limited to a size of 1 008 000 samples with each sample being 1 second which is just over 11 days of data storage If the Time History Store is full before the Event Memory Store the Event measurements will continue but will not have Time History data The diagram below shows an example of this CR 800C Series Sound Level Meter User Manual Broadband Measurement Broadband Measurement Broadband Measurement SIS Broadband Measurement Broadband Measurement Broadband Measurement Broadband Measurement SEER Time History Time History Time History Time History Time History Time History Time History Broadband Measurement Broadband Measurement Page 51 Time History Memory Full Broadband Measurement Time History T 1 1 1 1 1 1 Broadband Measurement Time History Broadband Measurement Time History Broadband Measurement Time History Time Broadband Measurement History Page 52 CR 800C Series Sound Level Meter User Manual 6 Maintenance amp Care The CR 800C is a precision measurement instrument and should be treated with care Do not allow the instrument to be exposed to substances whic
54. over 5 minutes 1 Switch on Calibrate Set Measurement Mode to 1 3 Octave Band Set Measurement Duration to 5 minutes Set Measurement Range Start Measurement a Run for 5 minutes 7 Stop Measurement 8 Review Measurement Data A ey Make a set of twenty four 1 hour measurements 1 Switch on Calibrate Set Measurement Mode to Broadband Set Measurement Duration to 1 hour Set Auto Repeat to On Set Number to 25 Set Auto Synchronise to On a Start Measurement After 24 1 hour measurements the instrument will stop Review Measurement Data O oo CR 800C Series Sound Level Meter User Manual Page 9 3 2 Quick Start Switch on Key Press Display O Cirrus CR 800C O P Cirrus Car Research plc MH 4 E CR 800C 03 01 aS DD e gt gt T 23 11 07 14 56 01 When the instrument has switched on the start up screen will change to the standard noise level display Calibrate the Sound Level Meter A If a microphone extension cable is to be used during a measurement the instrument must be calibrated with the cable attached Connect the Acoustic Calibrator to the Sound Level Meter and select the 94dB setting on the Acoustic Calibrator Press the Menu key to select the Calibrate option and press OK to start the calibration procedure Key Press Display CR 800C Main Menu aT Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode Menu v Repx Syncx 00 30 00 OK CR 800C Main Menu Calibrating
55. p through the memory locations Move through the measurement parameters when running a measurement Move through the stored measurement parameters in memory recall mode Select a lower frequency band in 1 1 and 1 3 Octave Band Filter mode Step down through menu options Resets the current measurement when running Power On and Off Stops the current measurement when running Start and Pause a measurement Switch on and off the display backlight Exit menu option Cancel data entry Select menu option Accept data entry Enter Memory Recall Mode and step through the memory locations Select the menu mode and view the menu options 4 2 Menu System The CR 800C instruments use a menu system to allow the user to change the operation of the Sound Level Meter This menu system is described below along with the procedure to change the different measurement functions and operational parameters Page 28 CR 800C Series Sound Level Meter User Manual 4 3 Measurement Mode To select the Measurement Mode press the Menu Key The current measurement mode is displayed Key Press Display CR 800C Main Menu Broadband Mode V Menu 1 1 Octave Mode 1 3 Octave Mode y Repx Syncx 00 30 00 Broadband Mode To select the Broadband Measurement Mode Key Press Display Display CR 800C Main Menu I gt Calibrate oK 1 1 Octave Mode 1 3 Octave Mode vy Repx Syncx 00 30 00 Cirrus CR 800C Exit A O A ca A DD e
56. r EEEE DENE EADE AE EAA DENS 59 9 9 Measurement RANG Esser Ener A E eee Ra wer es 59 9 10 Noise Floor TY pial wecvcsetvasev a da A i 59 9 11 Available MEASUFEMENTS ccc EE EE EEE nr EE EEE EERE EE EES 59 9 12 Frequency Bands Nominal Frequencies c ccceceecece eset eee eee eee eee seat enete neta neenaeeaas 60 FIS MEn rior AA AI ARA Geta eine ies Aaa 60 9 14 Automatic MeasureMentS cece cece EEE EEE EEE rr 60 A RR 60 9 16 WEONES di A D A ad la 60 IAS DIMENSION St A a a A a ci acia 60 LEALES ENEE VEEE AEEA EKEN KENE EEKEREN ve van elas eee 60 9 19 Battery Lift A Da NAET EA A EA E Ea EE a SE aN 61 9 20 Environmental isa casey ceria cna A A A tented NAE id EOT id E a anaa ee 61 9 21 EXternal Connections raien aae e e AAEE AA A NRE E EA aa aa aani 61 9 22 Output Cables iri meien ia A A Aa Aaa aaa aaa 61 9 23 Software SUPPOMt iseen ria urinii A dada AEA EIRA E AAAA AE RENEE NA GUAE eens ad 61 9 24 Factory Optlons a EEEIEE EAE 61 10 Appendix 2 Acoustic Calibrators cccccceccceeeceeeeeeeseeeeeseeeeeeseeeeeeeeeeeeeeeeeeeeeeeeenaeeaneans 62 1071 Operation a G aora daa 62 10 2 Changing the Battery iii cas 64 10 3 ECC ia 65 10 4 Technical Informatio Ne e a e A EERE EEE rr 66 10 5 Free Field Correction viii de a Aaa AAA 67 11 Appendix 3 CE Certificate of Conformity ssssssssusnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn n 68 12 Warranty Information oomccoonnconnncannncannncannncnnnncnnnnrnnancnnnnrnnanrnnnnrnnanrn
57. ress Display Comments Running LAF 59 8 i E n T rr gt NAL ex dB Elapsed 00 08 23 Mem 10 Broadband When the Stop key is pressed the MM e current measurement is stored in Elapsed 00 15 00 the memory and the display LAegt 53 5 dB changes to the memory review LCpeak 95 0 dB mode LAE 82 9 dB w Inthis example the measurement 30 06 07 11 12 07 is a Broadband measurement 3 13 Viewing the stored measurements After a measurement has been stopped When the measurement is stopped the data is automatically stored in memory and the instrument enters the measurement review mode Use the Up and Down arrow keys to review the measurement data Recalling stored measurements Measurements can be recalled at any time to the instrument display CR 800C Series Sound Level Meter User Manual Page 27 4 Configuring the Sound Level Meter This section of the manual covers the configuration of the Sound Level Meter and the different options that are available to the user 4 1 Keypad INTEGRATING AVERAGING 1 Move through the measurement parameters when running a measurement 2 3 4 5 6 7 8 9 10 11 12 13 Move through the stored measurement parameters in memory recall mode Select a higher frequency band in 1 1 and 1 3 Octave Band Filter mode Step up through menu options Change the measurement range and display the current measurement range Enter Memory Recall Mode and ste
58. rument from the Deaf Defier3 software The entire configuration of the instrument can also be set from the Deaf Defier3 software using the Advanced Configuration option CR 800C Series Sound Level Meter User Manual Page 43 5 Viewing and Downloading the measurements When a measurement stops either by the user pressing the Stop key or when a measurement stops automatically the data is automatically stored in the memory 5 1 Recalling Stored Measurements To view stored measurements ensure that the instrument is not running Press the right hand arrow key to view the first stored measurement and the left hand arrow key to view the last measurement stored Key Press Display Comments Cirrus CR 800C 23 11 07 14 56 01 z Mem 1 Broadband The first measurement stored is gt es shown Elapsed 00 15 00 LAeqt 53 5 dB The parameters displayed depend LCpeak 95 0 dB upon the measurement type LAE 82 9 dB v 30 06 07 11 12 07 Mem 10 Broadband The last measurement stored is lt q A shown Elapsed 00 15 00 i LAeqt 53 5 dB The parameters displayed depend LCpeak 95 0 dB upon the measurement type LAE 82 9 dB M 30 06 07 11 12 07 The measurement type is shown at the top of the screen next to the measurement number The different measurement types have different parameters that are displayed and these are described below Page 44 CR 800C Series Sound Level Meter User Manual Broadband Mea
59. s 1 Group X or Class 2 Group X Sound Level Meters as appropriate They also meet the requirements for Class 1 and Class 2 according to IEC 60651 and 60804 depending upon the version of the instrument To meet the requirements of ANSI S1 4 for Random Incidence microphone response an NK 70 Random Incidence Adaptor should be used when making measurements 1 1 Messages and Symbols Messages are used in this manual to bring important information to your attention The different message types are indicated as shown below Please read A note is a hint or advice that helps you make best use of the equipment and accessories failure to follow instructions may cause data loss or may damage the Pay attention A caution informs you that improper use of the equipment or equipment Page 6 CR 800C Series Sound Level Meter User Manual 2 Introduction 2 1 Main Features 2 2 Measurement Functions The measurement functions that can be provided by the CR 800C depend upon the options that have been fitted Listed below is a summary of the measurements that can be provided by the basic Broadband instrument and by the addition of the 1 1 Octave Band or the 1 3 Octave Band filters If the Auto Repeat function is used the CR 800C can be made to repeat a broadband measurement up to 999 times The instrument can also be configured to synchronise the measurement start time with the instrument clock 2 3 Broadband Measurement Mode In Broadban
60. surement Key Press Display Comments Mem 10 Broadband The User Metric setting of the _ gt IM instrument determines if the unit Elapsed 00 15 00 stores LAE LAIeq t or LAFTeq LAeqt 53 5 dB f LCpeak 95 0 dB If the unit was in Overload or LAE 82 9 Under Range during the measurement this is indicated on 30 06 07 11 12 the screen Display Mem 10 Broadband E LAFmin 36 5 dB LAFmax 66 9 dB LO1 0 60 2 dB v 30 06 07 11 12 07 Display Mem 10 Broadband A L10 56 4 dB L50 50 4 dB L90 38 4 dB L99 37 4 dB v 30 06 07 11 12 07 Display Mem 10 Broadband The whole measurement duration a aaa is displayed on the screen when 20 the Time History data is reviewed 20 30 06 07 11 12 07 1 1 Octave Band Measurements Key Press Display Comments Mem 12 Octave Band The graphical display of the 1 1 _ Octave Band measurement is 2 shown with the measurement range shown on the left hand scale 20 30 06 07 11 12 07 CR 800C Series Sound Level Meter User Manual Display Mem 12 Octave Band 31 5 Hz 56 6 dB 62 5 Hz 52 125 Hz 43 250 Hz 54 30 06 07 11 Display Display Mem 12 Octave Band A 60 1 dB C 54 4 dB 74 1 dB 30 06 07 11 12 07 1 3 Octave Band Measurements Key Press Display Mem 12 1 3 Octave 90 20 v Comments M The graphical display of the 1 3 Octave Band measurement is shown with the measurement range shown on the left hand scale 30 0
61. ument contact Cirrus Research plc or your local representative for further assistance 7 1 Basics Symptom Possible Cause Possible Remedy The instrument does not switch on The batteries are not fitted Fit new batteries and switch on The batteries are flat or very low Fit new batteries and switch on The batteries are not correctly fitted Remove the batteries and check the polarity of the batteries 7 2 Calibration Symptom Possible Cause Possible Remedy The calibration fails Too Low The Acoustic Calibrator is not switched on Switch on the Acoustic Calibrator and retry The Acoustic Calibrator is not fitted correctly Check that the Acoustic Calibrator is fitted according to the instructions supplied The Preamplifer is not fitted correctly Class 1 Instruments only For Class 1 Instruments refer to page 15 for details of fitting the preamplifier The microphone capsule is loose or not fitted Check that the microphone capsule is tight and fitted correctly Calibration level set to a different level Set the calibration level to the value provided by the Acoustic Calibrator See page 37 The Microphone may be damaged Contact Cirrus Research plc or your local representative for assistance The calibration fails Too High The Acoustic Calibrator is set to a higher level than the expected level Set the Acoustic Calibrator to
62. und Level Meter User Manual 5 3 Downloading Measurements to the Software Before measurements can be downloaded the software must be installed on to a suitable PC 5 4 Software Installation The CR 800C Series are supplied with the Deaf Defier3 software on a CD ROM Deaf Defier3 is suitable for PC s running Microsoft Windows 95 or later including WindowsXP and Windows2000 Deaf Defier3 is supplied on CD ROM with a full installation program and comprehensive on line help which gives details of the options and functions of the software along with details of the calculations used in the Hearing Protector Selection Report Please also note that full administrator access may be required to install the A Deaf Defier3 software under WindowsXP Windows2000 or WindowsNT Contact your system adminstrator for further details To install the software insert the CD ROM into a CD ROM drive on the PC The installation program should automatically start If the installation program does not automatically start run D setup exe where D is the drive letter of the CD ROM drive on the PC 5 5 System Requirements The Deaf Defier3 for Windows requires the following Microsoft Windows95 Windows 98 Windows 98 Second Edition Windows ME Windows NT Workstation 4 0 with service pack 6 Windows 2000 Professional with service pack 2 Windows XP Home Edition or Professional Internet access for downloading software updates 6Mb of available hard
63. v Repx Syncx 00 30 00 Display CR 800C Main Menu Display Run Durations gt Memory gt Setup p gt Display Print Options y v Repx Syncx 00 30 00 CR 800C Series Sound Level Meter User Manual Page 31 Run Duration OK 1 Minute 5 Minutes 10 Minutes v Repx Syncx 00 30 00 In this example the measurement duration will be set to 15 Minutes and the instrument will run continuously until the Stop key is pressed The change the measurement duration use the Up and Down keys to select the require duration and press OK to select Run Duration 15 Minutes 30 Minutes 1 hour 8 hours v Repx Syncx 00 30 00 In addition to the preset measurement durations the user can define the measurement duration using the Set User Time Option Display Run Duration User Defined Auto Repeat P Synchronise v Repx Syncx 00 30 00 OK Run Duration Time 00 01 00 hh mm ss Repx Syncx 00 30 00 Use the Up and Down keys to change the highlighted parameter and the Left and Right keys to move through the different fields Press OK to accept the User Time 4 5 Measurement Auto Repeat The auto repeat function is used to set the instrument to make a series of contiguous measurements For example if the measurement duration was set to 15 minutes and the Auto Repeat disabled after one 15 minute measurement the instrument will stop and store the measurement information the memory P
64. w switch on but will soon drop in voltage and indicate low battery or switch off CR 800C Series Sound Level Meter User Manual Page 65 10 3 Specification Frequency Sound Level Standardisation Distortion Operating Humidity Operating Static Pressure Operating Temperature Storing Temperature Effective Volume Cavity Diameter Battery Battery Life Battery Voltage Weight with Battery Dimensions 1kHz 1 94dB re 20uPa CR 514 IEC 60942 2003 Class 2 CR 515 IEC 60942 2003 Class 1 Less than 2 25 to 90 Relative Humidity 65 kPa to 108kPa 10 C to 50 C 20 C to 60 C 6 19 cm 0 2 cm 0 525 inch 1 x 9v 6F22 Neda 1604 Approx 15 Hours Continuous Use 9v Nominal 10v Maximum 6 4v Minimum 185g 135mm x 48mm Page 66 CR 800C Series Sound Level Meter User Manual 10 4 Technical Information The normal mode of operation of the calibrator is with the unit switched on When the LED indicates the unit is switched on this produces the greatest radio frequency emissions The calibrator continues to function after exposure to contact discharges up to 4kV and air discharges up to 8kV for both positive and negative voltages relative to earth ground The calibrator conforms to IEC 60942 2003 for a modulated root mean square electromagnetic field strength of 10 V m The maximum susceptibility to power and radio frequency fields is with the cavity facing away from the emitter with the battery compartment
65. weighting Sound level with C Frequency weighting and Impulse Time weighting The maximum Sound level with C Frequency weighting and Impulse Time weighting Peak Sound pressure level with C frequency weighting Sound level with C Frequency weighting and Slow Time weighting The maximum Sound level with C Frequency weighting and Slow Time weighting Daily personal noise exposure Equivalent continuous sound pressure level A measure of the average sound pressure level during a period of time t in dB Impulse weighted Leg as defined by DIN 45641 Statistical analysis of noise levels The n denotes the percentage exceedence Sound Exposure Level SEL with Z frequency weighting Equivalent continuous sound pressure level A measure of the average sound pressure level during a period of time t in dB with Z weighting Sound level with Z Frequency weighting and Fast Time weighting The maximum Sound level with Z Frequency weighting and Fast Time weighting Sound level with Z Frequency weighting and Impulse Time weighting The maximum Sound level with Z Frequency weighting and Impulse Time weighting Sound level with Z Frequency weighting and Slow Time weighting The maximum Sound level with Z Frequency weighting and Slow Time weighting The input to the Sound Level Meter is too high for the current measurement range Change the range The maximum value reached by th

CR:800B User Manual - Cirrus Research plc

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