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User manual for the CR:800C Series of Sound

1. OK Repx Syncx 00 30 00 Change Ln Values TT HR 1071 OK Ln 1 01 0 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 Ln1 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 Liegt Impulse Weighted Time Weighted Sound Level or Larred Takt Maximal Sound Level Key Press Display Setup T7 NEN 9 Time Weighting Frequency Weighting K Change Ln Vales User Metric gt v Repx Syncx 00 30 00 OK User Metric LAFTeq LIeqT Repx 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 Sound Level Meter User Manual Note that if the LIeq t function is selected the CR 800C will automatically select the Impulse Time Weighting which will apply to all other measurement functions described in s
2. 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 allow switch on but will soon drop in voltage and indicate low battery or switch off Page 62 CR 800C Sound Level Meter User Manual 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 CR 800C Sound Level Meter User Manual Page 63 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 disch
3. 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 Braadband Measurement Time History Broadband Measurement Time History Broadband Measurement Time History ii Time Broadband Measurement History Page 52 Section 5 Maintenance amp Care CR 800C Sound Level Meter User Manual The CR 800C is a precision measurement instrument and should be treated with care Do not allow the instrument to be exposed to substances which 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
4. Before measurements can be downloaded from the CR 800C instrument the Deaf Defier3 software must be installed from the supplied CD Please refer to page 49 for further details of the installation of the Deaf Defier3 software Assembly The CR 800C instruments are supplied fully assembled apart from the MV 200C 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 Q 2 Cirrus CR 800B 25 06 03 07 25 56 25 06 03 07 25 5 25 06 03 07 25 56 Do not cross thread the locking ring Damage caused by misuse is not covered by the warranty for the instrument Removing the Preamplifier CR 800C Sound Level Meter User Manual Page 15 D
5. 2kHz 3 15kHz 4kHz 5kHz 6 3kHz 8kHz 10kHz 12 5kHz 16kHz 20Hz amp 20kHz with MO 800 6 Factory Option Memory 16Mbit memory allowing up to 1300 broadband measurements 770 1 1 octave measurements 330 1 3 octave measurements For example 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 Lceq or Lzeq Up to 11 days at 1 second acquisition 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 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 Weight 450 gms Dimensions 340mm x 75mm x 25mm Batteries 2 x 1 5v Alkaline LR6 AA CR 800C Sound Level Meter User Manual Page 57 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 con
6. User Defined Auto Repeat P gt 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 parameter and the Left and Right keys to move through the different settings Press OK to accept the User Time 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 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 Measurement Auto Repeat Page 32 CR 800C Sound Level Meter User Manual The Auto Repeat function is used to set the instrument to make a series of contiguous measurements Please note that this function only operated in the Broadband Measurement Auto Repeat is not available during 1 1 or 1 3 Octave Band Mode 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 With the Auto Repeat function enabled the instrument
7. 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 been accumulated to give an accurate measurement Page 24 Key Press Display 59 8 Running LZF 1 3 Oct LZeqt dB Elapsed 00 01 00 CR 800C 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 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 Display Running LAF 59 8 1 ttt LCPeak WLI ite D e gt Elapsed 00 08 23 Display Running LAF 59 8 ty me je LAFmax IRE D c Elapsed 00 08 23 Display Running LAF 59 8 B je LAE Ds Elapsed 00 08 23 Comments The in
8. amp Date Page 37 To change the Date and Time select the Set Clock option from the Setup Menu Key Press Display Setup 7C AN Contrast bK Set Clock K Cal Level Resolution K v 00 30 00 Repx Syncx Set Clock Time Date OK Repx Syncx 00 30 00 Set Clock Time 00 01 00 hh mm ss Repx Syncx 00 30 00 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 Page 38 CR 800C Sound Level Meter User Manual The default calibration level is 93 7dB for use with Cirrus Research plc CR 510 Series Acoustic Calibrators set to the 94dB setting The correction of 0 3dB is required to suit the MK 224 and MK 216 Microphone capsules used by the CR 800C Series To adjust the calibration level select the Cal Level option from the
9. Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode SL 2 8 Repx Syncx 00 30 00 CR 800C Main Menu HR Calibrate Broadband Mode 1 3 Octave Mode wv Repx Syncx 00 30 00 CR 800C Main Menu C mE 3 Calibrate Broadband Mode 1 3 Octave Mode wv Repx Syncx 00 30 00 Start amp Stop the measurement To start the measurement press the Start Key Key Press Display Comments A CR 800C Main Menu Calibrate Broadband Mode 1 1 Octave Mode 1 3 Octave Mode wv Repx Syncx 00 30 00 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 Comments Page 12 CR 800C Sound Level Meter User Manual Mem 10 Broadband The instrument stores the coc measurement in memory and Elapsed 00 15 00 enters the measurement review LAeqt 53 5 dB mode LCpeak 95 0 dB LAE 82 9 dB v 30 06 07 11 12 07 Review the measurement 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 Refer to page 43 for details of the measurement review mode Unpacking and checking the Sound Level Meter Carefully remove the instrument from its shipping container and inspect it for p
10. 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 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 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 811 Power Adaptor Cable for CU 195A Mains Power Supply 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 Sound Level Meter User Manual Section 2 Getting Started How to These example settings are designed to demonstrate the different configurations that are available from the CR 800C Sound Level Met
11. Requirerments c en nn in He 65 Installation Requirements 2222ssssnnon non nun nun nun nun nun nnn rna DEEDS ESE DEEDS nun nun nun nun nun ESSE EES 65 Appendix 4 Configuring the instrument from the software eren 66 Appendix 5 CE Certificate of Conformity uanuanuanuannannannunnunnunnunnunnnunnunnunnunnunnunnunnne 67 Warranty Information uu uunuunnunnunnunnnunnunnunnannannannunnunnunnunnunnunnunnunnnnnnunnunnunnunnunnunnne 68 Cirrus Research Offlces o eeeciuce aaa an aan anna wenn raa anne 69 CR 800C Sound Level Meter User Manual Page 5 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 as well as comprehensive technical information using optional accessories as well as troubleshooting 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 instr
12. 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 2 93 7dB Different microphones will have different correction values Please check the operation manual for the Sound Level Meter or microphone concerned for details CR 800C Sound Level Meter User Manual Page 65 Appendix 3 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 note that for PC s running Windows 95 98 and 98SE the Deaf Defier3 software may need to install additional components to enable the database to function correctly These components are included with the installation program Please also note that full administrator access may be required to install the 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 progr
13. right to make changes to product specifications without notice To understand the latest updates that have been implemented into this product and to download the most current version of this user manual visit our web site at www cirrusresearch co uk Instrument Serial Number amp Information Please record the serial number and purchase date of your instrument below along with details for any accessories supplied with your optimus sound level meter Instrument Serial Number Purchase Date Publication History Issue 5 October 2014 CR800C 10 14 05EN CR 800C Sound Level Meter User Manual Page 3 An SE LSL IEREPERRLETEFLERTTLDELTERRERTTERTELTETEFTLEDELERELTSTLETTLLTELTELTEFTLETEETBETTELLETTLITERETELELTLETTLTERLESTTELTLTEETERT 5 M ssages and Symbols eee ere ee ee ee 5 Section 1 Introduction aaa na aaa aaa na aan an 6 Main FEATURES sro exis ee ee ones 6 Measurement RFUnetioNns ur een ne ee nr ee 6 Broadband Measurement Mode u2ss2snsnnnnnnnnnnnnnnnennennennennnnnnn anna nna sua sea sua sea sea sea sea sese nun 6 1 1 amp 1 3 Octave Band Measurement Mode nuusennennennennennennen emen emen menses nnn nnn nnn 7 Options GC ACCeSSOLIGS S oio rp oin pi quei piene een 7 Section 2 Getting Started uuuuunnunnununnnnnnunnununnnunnunnannunnunnunnunnunnunnunnnunnunnunnunnunnunnunnne 8 HOW CO a ee a RE nieht 8 Quicle Start E en nn EUREN He cia nn ge asia ada an En en KE UE XE ER 9 Unpacking and checking the Sound Level Meter sss
14. screen Broadband Mode V l 1 1 Octave Mode In this example the Auto 1 3 Octave Mode Synchronise is switched on wv Rep Sync 00 15 00 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 Please refer to page 66 for details of this function CR 800C Sound Level Meter User Manual Calibration Page 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 7C NN Calibrate Broadband Mode 1 1 Octave Mode 1 3 Octave Mode J wv Sync 00 15 00 Rep CR 800C Main Menu 3 Calibrating Please wait CR 800C Main Menu SEEN 1 Calibrated to 93 7 dBA Press Exit Key If the instrument cannot calibrate successfully CR 800C Main Menu I 17 Too Low Not Calibrated Press Exit Key CR 800C Main Menu I Too High Not Calibrated 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 informati
15. sees reenn 12 Instruments Eayout un ee een bein Erkennen 13 Installing the SoftWare a a aa IE Da a a A CERNAN OUNTE RETINDE ERES 14 Assembly na ner d ae nen en Dee ee nee 14 Switching On a en ni ln eek rl gens Re nee nen ehe 17 Checking the Configuration of the Instrument sese e eee cece cence eee eee ee eee nn nen nenne nenne nennen 18 Calibration oce vede de xod aeree nee nee ac x D e E e 21 Starting a measurermment i eee de eire exei a reta ee ee ne ee c pe Edna 22 Displaying the data during a measurement sse e eee e ee e e ee e e ee e e ee e e eee 24 Pausing and Resetting a measurement ee cece e e ee e e ee eee K Kee 25 Stopping the measurement ccr er bi REIR R nic pO are 25 Viewing the stored measurements see e ee e e ee nena eee nes 26 Section 3 Configuring the Sound Level Meter uauanunnanunnanunnanunnanunnanunnanunnanunnanunnannnn 27 Keypad ea E mt 27 Menu System mn 27 Measurement Mode Ar a xD e s Le EI ra een 28 Measurement DURATION sis ice Ene een eee caine Rx D Rn nate oa eld e E t eR d a a 30 Measurement Auto Repeat eec erred rex A Dad xen ra ER E e REN Dra RE RE Rn RAN en 31 Measurement Auto Synchronise sse eee e e e e ee e e e ee eee 33 Measurement Range ran e boas acy jailed ated accelerate dt cede 34 instrament Setup ierra ore zt a dota exa eoe AENA dna Annie 36 Section 4 Viewing and Downloading the measurements eene 43 Recalling Stored Measuremehts 25 erect a2 eee quer p
16. 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 Research plc Y i Cirrus h cirrus B Y B USB Socket Battery Holder a Multi I O Socket oo Connect to USB Port on PC oo Connect to USB Port on PC Page 50 CR 800C Sound Level Meter User Manual 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 Octav
17. switched on 1 3 Octave Mode Menu w The Auto Synchronise function is Repx Syncx 00 30 00 switched on CR 800C Main Menu Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode wv Rep Sync 00 15 00 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 EE range is set to 70dB to 140dB 70dB_to 14008 60dB to 130dB Range 50dB to 120dB 40dB to 110dB T 14 07 07 15 25 03 To change the measurement range use the Up and Down Arrow keys to select the required measurement range and press OK Refer to page 34 for details of setting the measurement range and the use of the bar graph display in choosing the correct measurement range CR 800C Sound Level Meter User Manual Page 11 Change the measurement function To check the current measurement function and to change the measurement function 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 Main Menu In this example the instrument is Menu SS set to Broadband Measurement Calibrate Mode
18. the required Frequency E Weighting and press OK to select A Weighting 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 Laeq Lceq Or LZeq Sound Level Lar Las Lar Lcr Lcs Lc1 Lzr Lzs or Lz not stored Maximum Sound Leve Larmax Lasmax Latmax LcFmax Lcsmax Lctimax LzFmax Lzsmax Or Lzimax Minimum Sound Level LaFmin LASmin LAImin LcFmin Lcsmin Lctmin LzFmin Lzsmin Or Lzimin User Metric Lae Lce Or Lze Lateg Lcteq Or Lzteq Larreq 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 L1 0 L10 0 Lso o Lso o and Los o To change the Ln values select Change Ln Values from the Setup Menu CR 800C Sound Level Meter User Manual Key Press Display Setup Time Weighting gt Frequency Weighting K Change Ln Values User Metric gt v Repx Syncx 00 30 00 Change Ln Values aT
19. 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 User Defined Set User Time gt Auto Repeat gt Synchronise b wv Repx Syncx 00 30 00 OK Auto Repeat On vi 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 Eb Repx Syncx 00 30 00 CR 800C Sound Level Meter User Manual Page 33 Measurement Auto Synchronise This function is new to the CR 800C Series and 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 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 50 12 05 This method of starting and stopping the measurements is used fo
20. 40 110 50 120 60 130 70 140 Noise Floor Typical Self generated noise tint 10s Acoustic 18dB 25dB 35dB 18dB 28dB Class Type 1 Instruments Acoustic 23dB 30dB 40dB 23dB 31dB Class Type 2 Instruments 1 1 Octave Band Filters 12dB Z 1kHz 1 1 Octave Band 1 3 Octave Band Filters 7dB Z 1kHz 1 3 Octave Band Available Measurements The following metrics can be displayed for a recorded session and stored Broadband Mode LcPeak Lar Las Lar Ler Lcs Let Lzr Lzs or Lz not stored Larmax Lasmax Latmax LcFmax Lcsmax Lctmax LzFmax Lzsmax Or Lzimax Larmin LASmin LAImin LcFmin Lcsmin Lctmin LzFmin Lzsmin OF Lzimin L eaq LCeq Or LZeq Lae Lce Or Lze Lateg Lcteq Or Lzieg Larreq Lo 1 to Loo o five simultaneous user selected values available Run time Date and time 1 second Short Leq 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 Lzr or LzI not stored Filtered Lzeq stored Laeq Lceq Lzeq stored Run time Date and time Page 56 CR 800C Sound Level Meter User Manual Frequency Bands Nominal Frequencies 1 1 Octave Band 31Hz 63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz 16kHz 1 3 Octave Band 25Hz 31Hz 40Hz 50Hz 63Hz 80Hz 100Hz 125Hz 160Hz 200Hz 250Hz 315Hz 400Hz 500Hz 630Hz 800Hz 1kHz 1 25kHz 1 6kHz
21. 8 dB v 30 06 07 11 12 07 Mem 12 Octave Band C E 3 37 8 kHz 28 7 dB 16 kHz 34 7 dB 30 06 07 11 12 07 Mem 12 Octave Band 1071 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 Comments l The graphical display of the 1 3 Octave Band measurement is shown with the measurement range shown on the left hand scale 30 06 07 11 12 07 Mem 12 Octave Band TT 9 X X 1071 25 Hz 78 3 dB 31 5 Hz 84 2 dB 40 Hz 79 7 dB 50 Hz 80 4 dB T 30 06 07 11 12 07 Page 45 Page 46 CR 800C Sound Level Meter User Manual Mem 12 Octave Band ST 62 5 Hz 80 Hz 100 Hz 30 06 07 Mem 12 Octave Band ST 160 Hz 64 6 dB 200 Hz 61 2 dB 250 Hz 60 7 dB 315 Hz 49 7 dB 30 06 07 11 12 07 Mem 12 Octave Band T HR 17 400 Hz 55 3 dB 500 Hz 58 3 dB 630 Hz 58 7 dB 800 Hz 54 7 dB 30 06 07 Mem 12 Octave Band ST kHz 52 0 dB 25 kHz 44 7 dB 6 kHz 46 5 dB kHz 49 6 dB 30 06 07 Ir Mem 12 Octave Band 2 5 kHz 49 3 15 kHz 46 4 kHz 42 5 kHz 325 30 06 07 11 12 07 Mem 12 Octave Band HR 3 I 6 25 kHz 6 dB 8 kHz 1 dB 10 kHz n dB 12 5 kHz c dB 30 06 07 Mem 12 Octave Band VEEeM 53 16 kHz 30 06 07 CR 800C Sound Level Meter User Manual Page 47 Checking amp Clearing the memory The me
22. CR 800C 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 2014 Page 2 CR 800C Sound Level Meter User Manual Copyright Copyright Cirrus Research plc 2010 2014 All rights reserved You may re use this document publication not including the Cirrus Research plc logo and other product logos free of charge in any format for research private study or internal circulation within an organisation You must re use it accurately and not use it in a misleading context You must not modify text images or illustrations in any way The material must be acknowledged as Cirrus Research plc copyright and you must give the title of the source document publication Where any third party copyright material is identified you will need to obtain permission from the copyright holders concerned Trademarks Cirrus Research plc the Cirrus Research plc Logo doseBadge DOSEBADGE optimus Trojan the Trojan Logo the NoiseTools Logo and the Noise Hub Logo are either registered trademarks or trademarks of Cirrus Research plc in the United Kingdom and or other countries Microsoft and Windows are registered trademarks of Microsoft Inc All other trademarks acknowledged Updates In the interests of continuous product improvements Cirrus Research plc reserves the
23. For Class 1 Instruments refer to page 14 for details of fitting the preamplifier CR 800C Sound Level Meter User Manual Page 53 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 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 Measurements amp Settings Symptom Possible Cause Possible Remedy No measurements have been stored Memory is full Check the available memory See page 47 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 Synch
24. Hz 80MHz EN 50204 1995 900MHz EN 61000 4 8 1994 50Hz CR 800C Sound Level Meter User Manual Page 59 Appendix 2 Acoustic Calibrators 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 Cirrus Research plc 94dB 1kHz x IEC 60942 2003 Class 2 Z S Wy Der S Un rr Sch AM A Aroneg b Aan ox 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 Page 60 CR 800C Sound Level Meter User Manual 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 tha
25. Telephone 44 1723 891655 Equipment Description The following equipment manufactured after 1 November 2007 CR 811C Sound Level Meter CR 812C Sound Level Meter CR 821C Sound Level Meter CR 822C Sound Level Meter CR 831C Sound Level Meter CR 832C Sound Level Meter CR 514 Acoustic Calibrator CR 515 Acoustic Calibrator Along with their standard accessories According to EMC Directives 89 336 EEC and 93 98 EEC meet the following standards EN 61000 6 3 2001 EMC Generic emission standard for residential commercial and light industrial environments EN 61000 6 1 2001 EMC Generic immunity standard for residential commercial and light industrial environments Signed Dated 1 January 2007 S O Rourke Director Page 68 CR 800C Sound Level Meter User Manual Warranty Information 10 11 12 13 14 15 16 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 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 September 1st 2011 The warranty covers all faults on and minor accidental damage to the instrument except the microphone capsule for the period defined in para 5 below Minor accidental damage does not include blatant miss use damage cau
26. am does not automatically start run D setup exe where D is the drive letter of the CD ROM drive on the PC 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 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 9 Pin RS232 Serial Port or USB Connection 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 Page 66 CR 800C Sound Level Meter User Manual Appendix 4 Configuring the instrument from the software The configuration of the instrument can be set from within the Deaf Defier3 software Different configurations can be saved and loaded into the instrument to suit different mea
27. anual covers the configuration of the Sound Level Meter and the different options that are available to the user Keypad 1 2 3 4 5 6 7 8 9 10 11 12 13 Move through the measurement parameters when running a measurement 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 step 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 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 Sound L
28. arges 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 facing the table the antenna polarisation horizontal and the calibrator switched on Page 64 CR 800C Sound Level Meter User Manual 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 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
29. ate 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 70d4B to 140GB 60dB to 130GB 50dB to 120dB 40dB to 110GB v 14 07 07 15 25 03 40dB to 110dB 30dB to 100dB 20dB to 90dB 10dB to 80dB 14 07 07 15 25 03 v 70dB to 140dB 60dB to 130dB 50dB to 120dB 40dB to 110dB v 14 07 07 15 25 03 The diagram above shows how the bar graph will show where the noise level is placed within the selected measurement range Select the appropriate measurement range to suit the noise levels to be measured Page 36 CR 800C Sound Level Meter User Manual Instrument Setup Select the Setup option from the main menu and press OK Key Press Display Comments CR 800C Main Menu s rrrmmmm OK Run Durations b Memory 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 TT E Contrast K Set Clock K Cal Level Resolution K v Repx Syncx 00 30 00 Select the Lighter or Darker option and press the OK repeatedly to adjust the selection Darker Contrast Press the Exit button to exit from the Contrast menu Repx Syncx 00 30 00 CR 800C Sound Level Meter User Manual Time
30. dition When batteries approach end of life the unit will store any data required and switch off automatically Environmental Temperature Operating 10 C to 50 C Storage 20 C to 60 C Humidity Up to 95 RH Non Condensing External Connections Data Output USB Type B Socket Multi pin Expansion Socket 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 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 Pin RS232 Serial Port PC specification Minimum PII 266 MHz Recommended PIII 500 MHz 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 55022 1994 EN 61000 4 2 1995 Page 58 CR 800C Sound Level Meter User Manual EN 61000 4 3 1996 80MHz 1GHz EN 61000 4 3 1996 25M
31. e measurement takes 3 memory slots The diagram below shows how the different measurements take up different amounts of memory space 1 1 Octave Band Measurement 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 also 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 at 1 second samples 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 Broadband Measurement CR 800C Sound Level Meter User Manual Broadband Measurement Broadband Measurement SR Broadband Measurement Broadband Measurement Broadband Measurement Broadband Measurement SEB A Time History Time History Time History
32. ection Time Weighting on page 39 Before the Time Weighting can be selected to either Fast or Slow the User Metric must be set to SEL 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 Please refer to page 66 for details of this function CR 800C Sound Level Meter User Manual Page 43 Section 4 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 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 kjey to view the last measurement stored Key Press Display Comments Cirrus CR 800C gt gt m 23 11 07 14 56 01 z Mem 1 Broadband The first measurement stored is gt 9 shown Elapsed 00 15 00 LAegt 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 E Men 10 Broadband The last measurement stored is lt q mmmm i shown Elapsed 00 15 00 l LAeqt 53 5 dB The parameters displayed depend LCpeak 95 0 dB upon the measurement type LAE 82 9 dB 30 06 07 Tis The measurement type is shown at the top of the scr
33. een next to the measurement number The different measurement types have different parameters that are displayed and these are described below Page 44 Broadband Measurement Key Press Display Mem 10 Broadband Elapsed 00 15 00 LAegt 53 5 dB LCpeak 95 0 dB LAE 82 9 dB 30 06 07 11 Display Mem 10 Broadband LAFmin 36 5 dB LAFmax 66 9 dB LO1 0 60 2 dB 30 06 07 11 12 07 Display Mem 10 Broadband L10 56 4 dB L50 50 4 dB L90 38 4 dB L99 37 4 dB wv 30 06 07 11 12 07 Display Mem 10 Broadband B 90 20 30 06 07 RIR e Ta 1 1 Octave Band Measurements Key Press Display Octave Band Mem 12 90 20 30 06 07 11 12 07 CR 800C Sound Level Meter User Manual Comments The User Metric setting of the instrument determines if the unit stores LAE LAIeq t or LAFTeq If the unit was in Overload or Under Range during the measurement this is indicated on the screen The whole measurement duration is displayed on the screen when the Time History data is reviewed Comments The graphical display of the 1 1 Octave Band measurement is shown with the measurement range shown on the left hand scale Display Display Display Display CR 800C Sound Level Meter User Manual Mem 12 Octave Band ST 31 5 Hz 56 6 dB 62 5 Hz 52 3 dB 125 Hz 43 9 dB 250 Hz 54 4 dB 30 06 07 11 12 07 Mem 12 Octave Band HR 500 Hz 53 6 dB 1 kHz 49 0 dB 2 kHz 45 5 dB 4 kHz 33
34. er Manual Section 1 Introduction Main Features Measurement Functions The measurement functions that can be provided by the CR 800C depend upon the options that have been fitted If the instrument has been fitted with the 1 1 Octave Band or the 1 3 Octave Band filters these measurements will be available 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 the broadband measurement up to 999 times See page 20 for details of setting the auto repeat function The instrument can also be configured to synchronise the measurement start time with the instrument clock See page 20 for details of the Auto Synchronise function Broadband Measurement Mode In Broadband Mode the instrument stored the overall values such as Laeg 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 Frequenc Maximum Minimum Function Weighting Displayed as value val
35. ers 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 SP SU Laon w Make a 1 1 Octave Band Measurement over 1 minute 1 Switch on 2 Calibrate 3 Set Measurement Mode to 1 1 Octave Band 4 Set Measurement Duration to 1 minute 5 Set Measurement Range 6 Start Measurement a Run for 1 minute Stop Measurement Review Measurement Data oo NI Make a 1 3 Octave Band Measurement over 5 minutes 1 Switch on 2 Calibrate 3 Set Measurement Mode to 1 3 Octave Band 4 Set Measurement Duration to 5 minutes 5 Set Measurement Range 6 Start Measurement a Run for 5 minutes Stop Measurement Review Measurement Data oo N 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 ae ee D 0 Quick Start Switch on Key Press D CR 800C Sound Level Meter User Manual Page 9 D
36. evel Meter User Manual Measurement Mode To select the Measurement Mode press the Menu Key The current measurement mode is displayed Please note that the CR 800C Sound Level Meters will revert to Broadband Measurement Mode when the instrument is switched off Key Press Display CR 800C Main Menu wmm 3 Menu Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode T Repx Syncx 00 30 00 Broadband Mode To select the Broadband Measurement Mode Key Press Display Display CR 800C Main Menu Calibrate OK Broadband Mode J 1 1 Octave Mode 1 3 Octave Mode wv Repx Syncx 00 30 00 Cirrus CR 800C lt gt lt gt LAF gt m o gt dB Exit 23 11 07 14 56 01 CR 800C 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 WENN 17 Calibrate OK Broadband Mode 1 1 Octave Mode J 1 3 Octave Mode bas se Repx Syncx 00 30 00 EN Cirrus CR 800C mm gt WE 1 1 Oct e t B 23 11 07 14 56 01 d 1 3 Octave Band Mode To select the 1 3 Octave Band Measurement Mode Key Press Display Display CR 800C Main Menu Calibrate OK Broadband Mode 1 1 Octave Mode 1 3 Octave Mode wv Repx Syncx 00 30 00 Exit Cirrus CR 800C u M 77 E a LI dB 23 11 07 14 56 01 Page 29 Page 30 CR 800C Sound Level Meter User Manual Measure
37. ion from the menu Key Press Display Comments Setup Frequency Weighting K Change Ln Vales User Metric gt v Repx Syncx 00 30 00 Time Weighting Select the required Time mE 1 Weighting and press OK to select Slow The select Time Weighting is Impulse 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 Lcs Lc1 Lzr Lzs or Lz not stored Larmax Lasmax Latmax LcFmax Lcsmax Lctimax LzFmax Lzsmax Or Lzimax Larmin LASmin LAImin LcFmin Lcsmin Lctmin LzFmin Lzsmin OF Lzimin Lo 1 to Loo o five simultaneous user selected values available The Ln s or Statistical parameters are calculated from Sound Level Therefore if the Time Weighting is set to Fast the Ln s will be calculated from Lar and also for the Slow and Impulse Time Weightings 1 1 Octave Band Mode Filtered Lzs Lzr or LzI not stored 1 3 Octave Band Mode Filtered Lzs Lzr or LzI 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 Frequency Weighting option from the menu Key Press Display Comments Page 40 CR 800C Sound Level Meter User Manual Setup ST Time Weightino gt Change Ln Vales User Metric gt v Repx Syncx 00 30 00 Freq Weighting Select
38. ion is ee shown at the bottom of the el Broadband Mode V 1 1 Octave Mode In this example the measurement 1 3 Octave Mode time is 15 minutes ee Rep Sync 00 15 00 Menu 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 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 CR 800C Sound Level Meter User Manual Measurement Auto Repeat Key Press Display Comments Cirrus CR 800C N gt III us 23 11 07 14 56 01 CR 800C Main Menu The status of the Auto Repeat is T NN shown at the bottom of the Broadband Mode V 1 1 Octave Mode In this example the Auto Repeat 1 3 Octave Mode is switched on wv Rep Sync 00 15 00 When the Auto Repeat is switched off the display is Repx Menu Measurement Auto Synchronise Key Press Display Comments Cirrus CR 800C N N e LI e 23 11 07 14 56 01 CR 800C Main Menu The status of the Auto Menu ou Synchronise is shown at the Calibrate bottom of the
39. isplay Cirrus CR 800C Cirrus COC Research plc L1 E CR 800C 03 01 I m LAF dB 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 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 Comments CR 800C Main Menu BR Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode Menu DS 4 Repx Syncx 00 30 00 OK CR 800C Main Menu Calibrating Please wait CR 800C Main Menu mEEEN 1 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 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 Key Press Display Comments CR 800C Main Menu In this example the measurement 71 duration is set to 15 minutes Calibrate Broadband Mode V The Auto Repeat function is 1 1 Octave Mode
40. ment 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 Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode wv Rep Sync 00 15 00 00 15 00 To change the measurement duration of the instrument Key Press Display CR 800C Main Menu m 7 Menu Calibrate Broadband Mode V 1 1 Octave Mode 1 3 Octave Mode wv Repx Syncx 00 30 00 Display CR 800C Main Menu Display Run Durations b v Memory K Setup K Display Print Options v MMC 2 Repx Syncx 00 30 00 CR 800C Sound Level Meter User Manual Page 31 Run Duration OK 1 Minute 5 Minutes 10 Minutes ae ee M ee Repx Syncx 00 30 00 In this example the measurement duration is 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 CS 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
41. mory 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 Run Durations K Setup p gt Print Options Repx Syncx 00 30 Memory Available Memory Clear Memory K OK Repx Syncx 00 30 OK Memory Measurement 99 Free Time History 63 Free Repx Syncx 00 30 To clear all the measurements from the memory use the Clear Memory option Key Press Display Comments Memory OK Available Memory Clear Memory wv Repx Syncx 00 30 00 OK Memory Confirm with OK Repx Syncx 00 30 00 Page 48 CR 800C Sound Level Meter User Manual 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 CR 800C Sound Level Meter User Manual Page 49 Downloading Measurements to the Software Before measurements can be downloaded the software must be installed on to a suitable PC Software Installation The Deaf Defier3 software must be installed before measurements can be downloaded Please refer to page 65 for details of the installation of the Deaf Defier3 software Connecting the instrument to the PC The CR 800C instruments connect to the PC using the
42. o 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 extension 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 200C 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 Ensure that the batteries are inserted correctly DO NOT reverse the polarity of the ZN batteries as this may cause damage to the instrument Using an external power supply The CR 800C can be used with an external power supply When the external supply is connected the CR 800C switches Cirrus CR 800C automatically from the internal battery power gt CE L bL When the external power is either removed or switched off the instrument will am LAF automatically s
43. on screen Press Exit to return to the main screen the display will show an error 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 Sound Level Meter User Manual CR 800C Main Menu The calibration level is unstable 171 The background noise level may be too high or the Acoustic Calibrator may not be fitted correctly to the Sound Level Meter Unstable Not Calibrated Press Exit Key Refer to the troubleshooting section on page 52 for further information Starting a measurement Broadband Mode Key Press Display Comments When the measurement is running the display shows Running in the top left hand corner 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 When the measurement is running the display shows Running in the top left hand corner Elapsed 00 01 00 If the measurement duration is set to Man
44. ossible 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 Please refer to page 59 for details of the Acoustic Calibrator Instruments Layout Information Label Tripod Mount o Microphone Capsule Preamplifier ml Cirrus CR 800C COC Li E LU LAF 23 11 07 14 56 01 CR 822C INTEGRATING AVERAGING SOUND LEVEL METER Menu A Display OK i i 3 gt zx E Exit g A 4 pac rr US USB Socket Research plc CR 800C Sound Level Meter User Manual Page 13 Display Keypad Battery Holder Multi I O Socket Battery Holder Page 14 CR 800C Sound Level Meter User Manual Installing the software
45. ptor and follow the instructions supplied with the instrument Do Not attempt to calibrate the instrument with the NK 70 fitted CR 800C Sound Level Meter User Manual Page 17 Switching On Key Press Display Y Cirrus nr Research plc N 4 T CR 800C 03 01 LAF dB 23 11 07 14 56 01 When the instrument is first switched on a Welcome 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 Please refer to page 34 for details of changing the measurement range The display will also show the battery level and when the instrument is in Overload or Under Range The Glossary on page Error Bookmark not defined also describes the indication of Overload and Under Range Cirrus CR 800C Cirrus CR 800C Cirrus CR 800C ST es VE LJ LAF I _ m LI LAF om mo om LAF 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 So
46. r example when the application is Occupational Noise and the user wants to control the starting and stopping of the measurement directly However in many applications such as Environmental Noise measurements 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 50 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 Key Press Display OK Run Duration User Defined Set User Time K Auto Repeat gt Synchronise gt E 4 Repx Syncx 00 30 00 Page 34 CR 800C Sound Level Meter User Manual OK Synchronise On J Exit Off Rep Syno 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 Measurement Range One of the most important features of a Sound Level Meter is the measurement range If the measuremen
47. ronise 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 The Run Duration has been set Select the Manual Run a set time to a preset value Duration The Run Duration has been set Select the Manual Run to the User Defined value Duration The measurement does not stop as expected The Run Duration has been set to Manual Select a preset Run Duration 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 Page 54 CR 800C Sound Level Meter User Manual Appendix 1 Specifications 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 Fil
48. sed by the use of any accessories or components not specified or recommended by Cirrus damage caused through non Cirrus modification continued use outside of Cirrus recommended procedure or conditions or use contrary to the any advice provided by Cirrus The initial 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 A shorter 1 one year or 52 week warranty is offered for used ex demo or ex rental equipment unless a special arrangement is made and a written confirmation of the special warranty is given by Cirrus Research plc Any rechargeable battery only has the battery manufacturer s one year warranty however there will be a reduced charge for their replacement during the annual Traceable Calibration On completion of the annual Traceable Calibration by Cirrus Research plc or an official Cirrus Calibration Centre the instrument will automatically be given an additional free one year warranty It follows that should the instrument be calibrated by Cirrus Research plc or an official Cirrus Calibration Centre every year the warranty is effectively continuous to a maximum of 15 fifteen years from the date of purchase There will be a charge for this Traceable Calibration and the price is publi
49. setup menu Key Press Display Comments Setup Contrast b Set Clock K Cal Level Resolution K wv Repx Syncx 00 30 00 Setup Use the Up and Down arrows to C0 U adjust the level and the Left and Cal Level Right arrow keys to move between 093 7 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 Refer to the operating manual supplied with the Acoustic Calibrator to be used for details of the correction required for use with an MK 224 or MK 216 Microphone Capsule 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 standard Key Press Display Comments Setup aT Contrast b Set Clock K Cal Level Resolution gt wv Repx Syncx 00 30 00 Use the Up and Down arrows keys to select the display resolution and press OK to select the Resolution OK High 000 00 Norm 000 0 required display resolution Press Exit to return to the main display Repx Syncx 00 30 00 CR 800C Sound Level Meter User Manual Page 39 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 opt
50. shed in the Calibration Price List The customer is responsible for all shipping duty and other charges relating to the annual Traceable Calibration Where a repair service is conducted under warranty Cirrus Research plc will cover the shipping duty and other costs relating to the repair of the instrument Cirrus Research endeavors to ensure stocks of instrument components for the full fifteen year period but do not guarantee to do so as certain components do become obsolete or discontinued If a sub component becomes obsolete and stocks are depleted then Cirrus Research will endeavor to facilitate a repair but will not offer the same length warranty 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 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 Cirrus Research plc reserves the right to amend or update these terms and conditions without prior notice Warranty Terms 2 5 May 2012 CR 800C Sound Level Meter User Manual Page 69 Cirrus Research Offices The addresses given below are the Cirrus Research plc offices Cirrus Research plc also have approved distributors and agents is many countries worldwide For details of your local representative please contact Cirrus Research plc at the address below Contac
51. strument 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 Sound Level Meter User Manual Page 25 Display Running s 59 8 B The a is shown in this gt m ILI LI e m Elapsed 00 08 23 Display i LAF 59 8 B The real time display of the noise mmm 1 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 Pausing and Resetting a measurement During a measurement the user can pause the measurement by pressing the Start Pause key Key Press Display Comments Elapsed 00 08 23 To restart the measurement press the Start Pause key again EN 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
52. surement applications and standards The following parameters can be set from within the Deaf Defier3 software Measurement Mode Run Duration Time Weighting Frequency Weighting Measurement Range User Metric Measurement Auto Synchronisation Measurement Auto Repeat Ln values Remote Control of the Sound Level Meter via Modem GSM or PSTN Instrument Configuration O x Clear Memory Seer ze Instrument CR 800B Computer clock Serial number 00000000 24 07 03 22 28 51 Firmware version 03 00 17 Instrument clock Calibration due 09 07 04 24 07 03 22 21 20 Close ry Instrument Setup Filter Mode Broadband Run Duration E minutes Time Weighting Fast v User Time Freg Weighting h H Synchronise Pn Level Range nap Auto Repeat n Nof 339 User Metric lna change Ln hooo ST Setup Notes These are the instrument s current settings E Setup Name n Current Setup f 15 Minute Measurements E 1 Minute Measurements 00 01 00 g xj New setup Delete setup cend Setup to lAstument For full details please refer to the Deaf Defier3 software help CR 800C Sound Level Meter User Manual Page 67 Appendix 5 CE Certificate of Conformity Cirrus Research plc Hunmanby UK CE Certificate of Conformity Ce Manufacturer Cirrus Research plc Acoustic House Bridlington Road Hunmanby North Yorkshire YO14 OPH United Kingdom
53. t details for Cirrus Research authorised distributors and agents are also available from the Internet Web site at the address shown below Main Office Cirrus Environmental Cirrus Research plc Acoustic House Unit 2 Bridlington Road Industrial Estate Bridlington Road Hunmanby Hunmanby North Yorkshire North Yorkshire United Kingdom YO14 OPH YO14 OPH United Kingdom Telephone 44 0 1723 891655 Fax 44 0 1723 891742 E mail sales cirrusresearch co uk Tel 44 0 1723 891722 WEDER www cirrusresearch co uk Email sales cirrus environmental com Germany Web www cirrus environmental com Cirrus Research plc Deutschland Arabella Center Lyoner Strasse 44 48 D 60528 Frankfurt Germany Tel 49 0 69 95932047 Fax 49 0 69 95932049 Email vertrieb cirrusresearch de Web www cirrusresearch de Spain CIRRUS RESEARCH S L Travessera de Gracia 62 4 78 08006 Barcelona SPAIN Tel 34 933 622 891 Email info cirrusresearch es Web www cirrusresearch es
54. t edt te On pl etw t a a ag de 43 Checking amp Clearing themetrioby eerte tex y ERR ee 47 Downloading Measurements to the Software sse e ee e e ee e e ee e e ee eee 49 Software Installation iic een E ERE EUR ADR Y VERRE ra V Cr Pe a ta d dt 49 Connecting the instrument to the DG A 75T 5 T R ENH TTS E A menn enimse enne 49 Understanding how the measurements are stored ssssssssssssessssesemmee mee 50 Section 5 Maintenance amp Care nuuuuuunnunnunnunnunnnnnnnnunnunnunnunnunnunnunnunnnnnnnnnunnunnunnunnannunnunen 52 Section 6 Troubleshooting csssssssssee seves sss ee sss ee sse ennenen ennenen ennenen enen 52 B siCs u ET 52 Galibrations or 52 Measurements amp Settings eee ee ne soe nee ers 53 Downloading Measurements eorr eT rT eT T VESTR TOE Tr re he ep ne nn ee 53 Appendix 1 Specifications uunuunuuunnnnnunnunnunnnnnnnnunnunnunnunnunnunnunnunnunnnunnunnunnunnunnunnunnne 54 Appendix 2 Acoustic Calibrators zusunnannunuanunnunnnannannunnunnunnunnunnunnuunnunnunnunnunnunnunnne 59 Operations er ane aarti eee cle n ntc o a eae 59 Changing the Battery zen en eoe ER E Gua npa TRS 61 Telenn es Lel cH ee ne nee pie len el 62 Technical Information zer ah EHI AH RR Bike 63 BiAA ERa AEE A ae ate vue Colon rn vices wa cane T ER PR 64 Page 4 CR 800C Sound Level Meter User Manual Appendix 3 Software Installation uuuuuuunuannanuanunnnnnnannunnunnunnunnunnunnnnnnunnunnunnunnannunnune 65 System
55. t 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 F1 L dd us eo qme dB 23 11 07 14 56 01 Range The current measurement range is GE Lv LA A 40dB to 110dB Range 70dB to 140dB 60dB to 130dB 50dB to 120dB 40dB to 110dB 14 07 07 15 25 03 v 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 See page 52 for an explanation of Overload and Under Range CR 800C Sound Level Meter User Manual Page 35 Display Comments Range The measurement range is 40dB to 110dB and the noise level is 40dB to 120 6dB 30dB to 20dB to The instrument is overloading and the O L symbol is shown 14 07 07 15 25 03 Range The measurement range is 70dB to 140dB and the noise level is 58 948 60dB to 130dB 50dB to 120dB The instrument is under ranging 40dB to 110dB and the U L symbol is shown prise eai med 2 14 07 07 15 25 03 The bar graph at the top of the screen can be used to select the appropri
56. t 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 applied 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 CR 800C Sound Level Meter User Manual Page 61 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 1 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
57. ters 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 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 Microphone Preamplifier Class 1 MV 200D Removable Preamplifier Class 2 MV 200D Integral Preamplifier Extension cables ZL 202 2m ZL 205 5m ZL 210 10m ZL 215 15m ZL 220 20m ZL 225 25m Time Weightings F 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 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 Amplitude Weighting Q 3 True Energy Integration Measurement Range CR 800C Sound Level Meter User Manual Page 55 Broadband 21dB A to 140dB A Class Type 1 25dB A to 140dB A Class Type 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 Range Steps 10 80 20 90 30 100
58. 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 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 Key Press Display Comments Page 26 Viewing the stored measurements After a measurement has been stopped CR 800C Sound Level Meter User Manual Elapsed 00 08 23 Mem 10 Elapsed LAeqt LCpeak LAE Broadband 00 15 00 53 5 dB 95 0 dB 82 9 dB 30 06 07 11 12 07 When the Stop key is pressed the current measurement is stored in the memory and the display changes to the memory review mode In this example the measurement is a Broadband measurement 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 Refer to page 43 for details of reviewing measurements Recalling stored measurements Measurements can be recalled at any time to the instrument display Refer to page 43 for details of recalling measurements CR 800C Sound Level Meter User Manual Page 27 Section 3 Configuring the Sound Level Meter This section of the m
59. 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 52 for basic troubleshooting If this does not solve the problem contact Cirrus Research plc or your local representative for further assistance Section 6 Troubleshooting 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 instrument contact Cirrus Research plc or your local representative for further assistance 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 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
60. ual 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 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 CR 800C Sound Level Meter User Manual Page 23 The display will show until enough data has been accumulated to give an accurate measurement Key Press Display Comments Elapsed 00 01 00 1 3 Octave Band Mode Key Press Display Elapsed 00 01 00 The instrument has not accumulated sufficient data to give an accurate measurement When enough information has been gathered the LZeq value will be displayed Comments When the measurement is running the display shows Running in the top left hand corner 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
61. ue Sound Level with Fast Time A Lar Latina ul Weighting C Lcr LcrFmax LcrFmin Z Lzr LzFmax Lzfmin Sound Level with Slow Time A las Eismas eu Weighting C Lcs Lcsmax Lcsmin Z Lzs Lzsmax Lzsmin Sound Level with Impulse A a E EMG Time Weighting C Ler Lcimax Lcimin Z Lz Lzimax Lzimin Equivalent Continuous Sound A Laeat E Pressure Level with C Leegt z x integration time t Z LZeqt A Lac Sound Exposure Level SEL C Lce Z Lze s Peak Sound Pressure C LCpeak Takt Maximum Sound Level DIN 45641 Larrea PACEM Impulse Weighted Equivalent A LAIeqt Sounds Press Level with C LCIeqt integration time t Liegt Z LZIeqt E Please note that only one Frequency Weighting can be selected at any time CR 800C Sound Level Meter User Manual Page 7 1 1 amp 1 3 Octave Band Measurement Mode 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 Lceq and Lzeq functions Function Frequency Stored Weighting STE Measurement PPS te Sound Level with Fast Time 1 1 amp 1 3 Weighting z ne Octave Bands 1 1 amp 1 3 Z LZeqt Y Equivalent Continuous Sound eq Octave Bands Pressure Level with A LAeqt Yes Broadband integration time t C LCeqt Yes Broadband Z LZeqt Yes Broadband The 1 1
62. ument 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 Class 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 Please refer to page 54 for full technical details of the CR 800C Sound Level Meters 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 Please refer to page 16 for details of the use of the NK 70 Random Incidence Adaptor 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 Pay attention A caution informs you that improper use of the equipment or failure to follow instructions may cause data loss or may damage the equipment Please read A note is a hint or advice that helps you make best use of the equipment and accessories Page 6 CR 800C Sound Level Meter Us
63. und Level Meter User Manual 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 F1 LEE us dB 23 11 07 Measurement Range Key Press Display 14 56 01 Cirrus CR 800C 23 11 07 14 56 01 Range 70dB to 140dB 60dB to 130dB 50dB to 120dB 40dB to 110dB 14 07 07 Range 15 25 03 70dB to 140dB 60dB to 130dB 50dB to 120dB 40dB to 110dB 14 07 07 15 25 03 v 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 change the 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 Sound Level Meter User Manual Page 19 Measurement Mode Key Press Display Comments Cirrus CR 800C am ap LAF dB 23 11 07 14 56 01 CR 800C Main Menu The current measurement mode is C E shown on the screen Calibrate Broadband Mode V In this example the measurement 1 1 Octave Mode mode is Broadband 1 3 Octave Mode Menu v Repx Syncx 00 30 00 Measurement Duration Key Press Display Comments Cirrus CR 800C 23 11 07 14 56 01 CR 800C Main Menu The measurement durat
64. witch back to the internal dB battery supply 23 11 07 14 56 01 When an external supply is connected the display of the instrument will show a symbol 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 Page 16 CR 800C Sound Level Meter User Manual 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 S1 4 For instruments supplied for use outside of the USA this adaptor may not be supplied For further details please contact your local representative or Cirrus Research plc 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 fitted with the microphone capsule remove the NK 70 Ada

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