Home

CEL-63x User Manual

Contents

1. able Seer 20 30 40 so eo 70 80 90 120 130 Hz Hz Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg 250 250 32 i 0 00 0 01 500 500 65 630 629 85 800 799 42 1000 1001 29 1250 1248 93 1600 1598 84 2000 1999 90 2240 2239 45 2500 2500 54 2800 2799 32 3150 3149 23 3550 3550 29 4000 3999 79 4500 4500 44 5000 5001 09 5600 5601 32 6300 6301 15 7100 7100 57 8000 7999 58 8500 8500 23 9000 9000 88 9500 9498 83 10000 9999 48 10600 10599 72 11200 11199 96 11800 11800 20 12500 12500 02 Maximum expanded uncertainty of above data with 95 probability k 2 e 500 Hzto1 kHz 0 3 dB e gt 1kHzto 4 kHz 0 5 dB e gt 4kHz to 8 kHz 1 0 dB e gt 8kHzto 12 5 kHz 1 5 dB 81 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Table 9 CEL 63X with CEL 251 Microphone directional response dB relative to zero degrees Orientation of CEL 63X Display at 90 degrees relative to ground Plebis E 20 90 40 so eo 80 90 110 120 180 140 Hz Hz eg Deg Deg Deg Deg Deg 250 250 32 500 500 65 630 629 85 800 799 42 1000 1001 29 1250 1248 93 1600 1598 84 2000 1999 90 2240 2239 45 2500 2500 54 2800 2799 32 3150 3149 23 3550 3550 29 4000 3999 7
2. RE MM M Profile 22 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL To select the Periodic data capture mode set the Data Sets Mode control to Periodic and then select the Periodic Interval The Periodic Interval is the time from the start of one period to the start of the next period You can set the Periodic Interval to one of the following e 1 2 5 10 15 20 30 or 60 minutes e 2 4 6 8 12 or 24 hours Synchronise time The Synchronise Time option synchronises both the periodic and the profile times to the actual time For example if a periodic time is 1 hour and a run starts at 09 18 with this option enabled then the first period finishes at 10 00 The second and all subsequent periods start on the whole hour The profile measurements are similarly synchronised to the period interval If the Synchronise Time option is disabled then in this example the first period continues to 10 18 the second period continues to 11 18 and so on You can also synchronise runs by using the timers by starting and ending runs on whole time period intervals This synchronises both the periodic and the profile measurements 23 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 4 Detailed description 4 1 Microphone and pre amplifier The CEL 63x instrument has a removable 12 inch 12 7 mm microphone This is a pre polarised microphone that uses a per
3. cesses eene eene ener eene EL Using the CONTIOIMS ccssscccesssseccssssnsccessssscccssssnseceessesecssssessesseseusecsssseseessssssecssssseseess 12 scc t Navigation KEYS viccesececscssscececsnucacesssvcadecsswaadessenesdscaews Aa AA sdadacensdadansncdacsessadactessadecteveaaees 12 PUT SEO EB ss ssasutasetasgnasenesevapssoieagnassesapnssnenasovepoiapnceyesasenisousnuessunnsensouasieepraanesereuaypiapennne Set the time and date oo icccsssscesscscccesssscssessscssessssccesssssessessssessessssssesssssessesstseee 13 Calibrating the instrument assesses eene eeeneeeeneees 13 Making a measurement FUN c cccesssscccessstcccessssccssssseccssssssecesssusecesssessessssssessssstsecees 10 Measurement VIEW testet terit a ae eaa e a ea aaa nea aa e eera aeaaee aaee 1o Measurement controlS sssssesssesssesssessseessresssesssessseessressresssessseessresseesssessseesseesssesssesssssse 18 Measurement data Stts 5 0 c5 nnnasannnnnaeincncaknanacaenanannnanands 21 Detailed description essoessosesoeessoeesocesscessocesocessoeesoeessosesocesscessocesseessocesocessoessoeessoee Z Microphone and pre amplifier ccscccsssccssseccssccescccsssecesssecesseecsssecessecssseeessesessres 24 d 3g ee CRT s 24 spec M EEUU 77 Navigation Keys cie Dice e cinia A A i ecoee acute icio ideis scie
4. CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Event Start Selections that can be made to the onset time s the threshold criteria lt gt and the threshold level dB Therefore the dB level of the parameter e g Laeq needs to be meet the threshold criteria e g gt continuously for the duration of the onset time in seconds for an event to start and the data to be captured Two criteria can be set e less than lt greater or equal to gt Event Stop Events are stopped using the same method as above However the threshold criteria lt gt is reversed automatically Note if the start and stop dB thresholds are close together then noise levels hovering around the levels could trigger multiple events in a short space of time Ideally the start and stop dB threshold levels should be separated as much as possible to prevent capture of unwanted and or an excessive number of events Care should be taken to select the appropriate onset and offset to ensure spurious events are not captured External Events The external events will start with a press of an external button Part of the NNR Kit will cause the meter to record an event for the minimum event time set either by extending an event in progress or starting a new event When the external button is pressed then an external event in progress won t finish until the user set maximum time The recor
5. e Set how long the backlight remains ON after a key press e Set the brightness level of the backlight Measurement Control The measurement setup allows you to set the measurement start and stop modes and to set the measurement capture mode 35 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Measurement start and stop modes There are three methods available to start and stop the CEL 63x instrument s measurements IMPORTANT n Note that the CEL 63x instrument stops capturing measurements saves the current measurement results and then shuts down if the battery charge fails during operation Make sure the batteries have sufficient charge to allow continuous operation for the full measurement period For long measurement periods consider operating the instrument using a mains power supply Refer to section 3 1 Powering the instrument on page 10 for information about power supply options e Start and stop measurements by pressing a key The instrument starts to capture measurements when you press the Run Stop key and continues to capture measurements until you press the key again e Fixed duration measurements In the fixed duration measurement mode the instrument starts to capture measurements when you press the mimm Run Stop control key gt m key It continues to capture S measurements for the period set by this screen Exit Ota e Timer measurements The CEL 63x
6. CASELLA CEL CEL 63x Environmental amp Occupational Noise Meter HB3356 03 User Manual CASELLA MEASUREMENT Regent House Wolseley Road Kempston Phone 44 0 1234 844 100 Fax 44 0 1234 841 490 E mail info casellacel com eb www casellameasurement com CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Contents DILECTE ne 1 1 1 1 2 3 1 3 2 3 3 3 4 3 5 4 3 Introd ctOofn 3 5 iiooco cT eeeee rade to ateei iE v vov degere ee vUe eee oa ee cuoco DUE P INE eR Co SUE EeR REUS ONES Structure of this User Manual cccssscccserccsssccesseecsseceesssecesnecseeeeessnceesaneeseeeeeseneeenenees Sape uM MEMINI MM MM FOACUIES RETI 5 5 Colour coding ccssccessscesssccesseccessccesssccesseecssseeesuecesseecsssecesseecesseecssuecesssecesseecsseceseeeesee O 7 9 Quick Teleren Baa copied ha EPIRI EP CCRY Y EPI RENI UR TEN YReIV FED REA rU Rr v even Ei vesti LO Powering the instr moert esce oen ino toe eon aoa arenae eun O Battery Supply niei resto ru erae ea rore oe roro oer o ro o eer ea a rese es aa aa eere aa ree iios LO How to fit new batteries Lua eeseeen eun s oue so suchte petu pobnseneGu sns esr pn padre axo sas r osa shcs pase pas cpurs Eus 10 Mains DC supply ccssscccessssscccesssscecssssnsecesssescecsesessecssssesecsessessecessssecsssseseesssssssessesseee LL Battery condition indicator
7. CEL 63x Environmental amp Occupational Noise Meter CEL 1 2 Safety A The CEL 63x instrument does not present a safety risk when you use it as instructed in this User Manual However it is possible that the environment where you use the instrument may present a safety risk and you must ALWAYS follow correct safe working practices WARNING Always be aware of the risks in the environment where you are working e The CEL 63x instrument is NOT intrinsically safe DO NOT use it in an atmosphere where explosive vapours or dusts might exist e Wear approved ear defenders when making measurements in noisy environments e Wear approved protective clothing and footwear suitable for the environment where you are making measurements e Always follow local safety regulations and be aware of risks in the area where you are working CAUTION Use the CEL 63x instrument only as instructed in this User Manual Do not use the instrument for any purposes for which it has not been designed CAUTION The CEL 63x is a precision instrument Always handle it with care Do not use the CEL 63x instrument if it has been damaged Refer to section 8 Servicing and Warranty arrangements on page 69 for instructions to follow if the instrument has been damaged or has developed a fault 7 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL A CAUTION The CEL 63x instrument can operate from a battery power supply e Us
8. Lavg Average sound level CASELLA CEL time constant to rising signals and a 1500 ms time constant to decaying signals when calculating a sound pressure level The Impulse Time Constant was traditionally used to display an impulsive type noise allowing the maximum levels to be more easily seen on a changing display Impulsive measurements are identified by using the subscript T The level that would contain the same amount of energy in one second as the actual noise has during the whole measurement period The A weighted also C weighted Z weighted steady level that would contain the same amount of noise energy as in the actual noise effectively giving an average level over the measurement period Following the ISO procedures doubling the energy results in a 3 dB change in the Leq This is denoted by the exchange rate Q 3 Example If the noise level in a factory were a constant 85 dB and the measurement period were 4 hours the Laeq would be 85 dB A The calculation of Laeq does not use a threshold as in the calculation of Layg except for the Laeq T80 function defined for the ACGIH standard The A weighted sound pressure level measured using fast time weighting also with Slow and Impulse time weighting The maximum A weighted sound level measured using slow time weighting also with Fast and Impulse time weighting The average sound level over the measurement period is a function used in OSHA measu
9. Max If narrowband results are stored this gives the option to print the Leq and Max for each octave or 1 3 octave band e Octave Ln s If narrowband Ln s are stored and some Ln s are currently selected this gives the option to print those Ln values for each octave or 1 3 octave band e Period 0010 0020 0075 If the run stores two or more period results then the user can select to print the results for up to 25 periods at a time In this example periods 10 to 20 are printed from the set of 75 period results stored e Print Report When this option is selected pressing the Print key prints the report Pressing Exit or switching the printer off stops any current printing The printed report includes the optional user logo the run start date and time and duration and the instrument setup and calibration data This is followed by the cumulative or period broadband and narrowband results and then by the Location Operator and Signature fields which can be filled in by the user NOTE The functions printed in the report and displayed on the results screens are those that are defined in the current measurement setup The printing of octave and 1 3 octave results can use considerable amounts of printer paper especially if a number of different periods are printed Up to five functions are printed for each set of frequency bands so if Octave Leq Max is enabled then selecting more than three Ln functions in the current meas
10. PASSED 10 Press the Exit soft key on the instrument 11 Press and hold the ON OFF key on the calibrator to switch the calibrator OFF 12 Remove the calibrator from the instrument s microphone and re fit the microphone s windshield You have now calibrated the CEL 63x instrument and made it ready for a measurement run 15 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 3 5 Making a measurement run The CEL 63x instrument measures calculates and records all noise functions simultaneously during a measurement In this manner it removes the need for critical set up of the instrument before any measurement Measurement runs can be recorded as cumulative or periodic data sets as well as a fast profile time history For an explanation of these modes refer to Measurement data sets beginning on page 21 Measurement view The measurement view simply defines which functions you view on the instrument s screen either while making a measurement or while reviewing measurements recorded previously The instrument has a wide range of measurement view options that you can choose The individual types of instrument in the CEL 63x range offer different views Refer to section 6 Specifications beginning on page 59 for more information e There are four fixed views that meet international requirements for workplace noise measurements You can review the functions displayed for each of these fixed vie
11. screen changes to the Status screen 4 Press the Menu Soft key to see the instrument s Settings menu 5 Follow the instruction steps shown in Figure 3 to set the instrument s calibration reference level so that it is the same as the sound pressure level that the calibrator generates Figure 3 Setting the instruments calibration reference level FEES rc Esc Esc rat ers ARO i amp Q0 4 dB efto ae Range 93 95 113 115 dB Range 93 95 113 115 dB Ci a j 1 4 m gt 3 4 8 gt La 6 4 m v v 6 Save and exit to the Measurement screen 7 Gently fit the calibrator to the instrument s microphone and press it into position as shown in Figure 4 14 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Figure 4 Instrument calibration Cal n mao Cal rof 114 0 Cal rof 114 0 Li 1123 dB L 113 8 dB La 1140 dB 8 Press the ON OFF key on the calibrator item 1 in Figure 4 to switch the calibrator ON The CEL 63x instrument selects the calibration screen automatically when it detects a stable 1 kHz calibration tone NOTE o Calibration mode operates only in Stop mode when the instrument shows red screen bars It does not operate while a run is active 9 Follow the instruction steps in Figure 4 to complete the calibration and save the results Note that the calibration takes typically less than 10 seconds to complete and for the screen to display the word
12. 0 3 0 5 0 2 0 2 0 28 6300 6309 56 0 1 0 1 0 4 0 5 0 5 0 29 7100 7079 45 0 3 0 3 0 2 0 1 0 1 0 32 8000 7943 27 0 0 0 0 0 0 0 0 0 0 0 35 8500 8413 94 0 1 0 1 0 1 0 2 0 2 0 38 9000 8912 49 0 0 0 0 0 1 0 1 0 1 0 41 9500 9440 59 0 1 0 1 0 2 0 3 0 3 0 44 79 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 0 E B a Expanded 0 Degree 0 Degree Free Field ree Fiel uncertaint Dain a Sets Free Field Free Field Mice Response Corrections of j Response Corrections with wind with Wind Corrections Screen Screen k 2 Hz Hz dB dB dB dB ol ol 3 10000 9999 98 0 0 0 0 0 3 0 3 0 3 0 46 10600 10592 52 0 0 0 0 0 4 0 4 0 4 0 48 11200 11220 16 0 0 0 0 0 5 0 5 0 5 0 50 11800 11885 00 0 1 0 1 0 7 0 6 0 6 0 52 12500 12589 23 0 0 0 0 0 8 0 8 0 8 0 53 13200 13335 19 0 1 0 1 1 0 1 1 1 1 0 55 14000 14125 35 0 1 0 1 1 2 1 3 1 3 0 57 15000 14962 33 0 1 0 1 1 3 1 4 1 4 0 59 16000 15848 90 0 1 0 1 1 4 1 5 1 5 0 60 17000 16788 00 0 0 0 0 1 7 1 7 1 7 0 60 18000 17782 76 0 0 0 0 1 9 1 9 1 9 0 60 19000 18836 45 0 0 0 0 2 0 2 0 2 0 0 60 20000 19952 58 0 0 0 0 2 1 2 1 2 1 0 60 1 Corrections below 250Hz are 0 0dB 80 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Table 8 CEL 63X with CEL 251 Microphone directional response dB relative to
13. ASCII and are terminated with a carriage return and then linefeed character The general output format is line type YYYY MM DD HH MM SS descriptor1 value1 descriptor2 value2 CRLF Where CRLF is the 2 characters Carriage return ASCII 13 followed by line feed ASCII 10 Normal Profile Result output every 1 second to 1 hour This outputs 1 line of results to RS232 every profile interval These are the same profile results which are stored on SD card and can be output to Casella insight This outputs the 6 fixed functions Laeq Lareg Larmax Lasmax Latmax and Lepeak If the Profile time is set to 1 minute or more and the Profile functions Ln option is selected and the meter is a CEL 633A B C then the 6 fixed functions are followed by 5 Ln values using the current Z C or A weighting These are always Fast time weighted so if the Current broadband weighting is C then Lerio Lcrao Lcroo Lcros Lcrnn n are Output where nn n is the user selected Ln percentile If Ln s are not output then 6 functions are output in a single line e g lt PRF gt 2010 06 02 23 19 45 Lacq 60 3 Lateg 61 9 Larmax 69 2 Lasmax 68 4 Latmax 70 2 Lcpeak 103 2 85 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL If Ln s are also output then 5 functions are output immediately after the Lepeak 103 2 above to give 11 functions in total e g Lario 64 5 Lars0 63 2 Largo 45 7 Laroo o 32 4 The dat
14. External Events SLM Mode ONLINE Mode NNR Mode Timers NS amp S amp S amp amp amp amp cien NN S NN Gb Ob Ob cres The CEL 63x instrument provides SPL Integrating and Octave band noise measurements compliant with the following international standards e IEC 61672 1 2002 5 Electro Acoustics Sound Level Meters Group X instruments Performance of Class 1 or 2 as relevant to the instrument model e IEC 60651 1979 IEC 60804 2000 ANSI 81 4 1983 ANSI 81 43 1997 R2007 e 1 1 Octave and 1 3 Octave Filters comply with EN61260 1996 Class o and ANSI 1 11 1986 Order 3 Type oC 59 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 6 3 6 4 6 5 6 6 6 7 6 8 6 9 Measurement range Single measurement range up to 140 2 dB A RMS and 143 3 dB C peak Linearity range from 10 dB above noise floor When used with the high range microphones MIC1 the maximum RMS ranges is up to 165 0 dB A RMS frequency weightings A C and Z filter weightings satisfying IEC 61672 1 2002 Class 1 Octave and 1 3 Octave measurement Octave Real time 11 bands with centre frequencies from 16 Hz to 16 kHz 1 3 Octave Real time 33 bands with centre frequencies from 12 5 Hz to 20 kHz The displayed spectrum can be pre weighted with A C or Z Z weighted octaves are stored only to be post weighted in insight software Peak measureme
15. Lag LaFmin LaFmax Lepeak e Other Data o Start period time Period duration Period overload time Period Pause and Back erase time Period Overload and Battery fail flags O O O O B Octave and 1 3 Octave Cumulative and Periodic results In addition to all the broadband results listed above the instrument can also produce the following results for each of the octave or 1 3 octave bands e Lzeg LZFmax Lzsmax Lzrio Lzrso LZFo0 Lzros LZFvariable e Lceq Lcrmax LesMax Lcrio Lcrso Lcroo Loros Lcrvariable Laeq Larmax Lasmax Lario Larso LaFoo Laros Larvariable Only Lzr are stored The Casella insight data management software allows calculations for L4 and Lc C Profile Results For each profile interval the following results are produced e Broadband Laeq Lareq Larmax Lasmax Latmax LcrrAK e Profile start time e Overload and battery fail flags 66 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL D Marker Record Results This produces a file of events where each event is either one of four markers or a Pause or a back erase event The Start time duration and type of event is stored for every event during each measurement run Casella insight can show these records on graphs of the measurement results The above results can be viewed on the instrument or by using insight and different results can be viewed even after the run has finished by changing the measureme
16. This is the same screen that the instrument shows after you switch the instrument ON iMm uM e 15 Sep 11 11 25 37 free er 9994321 irmware versi ion 129 02 14 asella CEL 44 0 1234 844100 Refer to Status on page 27 for a description of the Status screen USB connect mode The CEL 63x instrument has a mini USB port that allows you to connect the instrument to a PC running Windows XP or Windows Vista or Windows 7 A USB mode active When the instrument detects that it is connected to a PC the TRE instrument displays an option to stop any run that is currently LSS active The instrument then switches to Active USB mode You should use the insight program supplied by Casella to download results to the PC See Mini B USB port on page 55 for information about the connection The PC recognises the instrument as a removable drive and identifies it by an available drive letter for example J IMPORTANT The CEL 63x instrument stores measurements as binary files You must use the optional insight software supplied by Casella CEL to read these files CAUTION Always use the Safely Remove Hardware icon in the Notification Area of the PC s taskbar to disconnect the CEL 63x 47 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 4 4 Measurement views User settings The CEL 63x instrument has two measurement views that are available for user defined settings These meas
17. You should check that the batteries have adequate battery life before you begin a measurement Replacement batteries should be new or fully charged 10 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Fitting the batteries You do not need any special tools to fit new batteries to the instrument 1 Ifnecessary press and hold the ON OFF key to switch the instrument OFF 2 Remove the three exhausted batteries from the battery compartment 3 Fit fully charged batteries into the battery compartment observing the polarity markings 4 Press and release the ON OFF key and check the battery symbol shows the batteries have a good charge Mains DC supply If you need to operate the instrument for a long period you should operate the instrument from a mains DC power supply if possible The use of AA batteries is also recommended in case of power interruption The instrument DOES NOT include a mains DC supply as standard Please obtain and use an optional Casella power supply part number PC18 NOTE The CEL 63x instrument disconnects the internal batteries when you connect a mains DC supply to it The batteries do not recharge when you operate the instrument from a DC supply If you use rechargeable batteries with the CEL 63x instrument you must use an external battery charger of the correct type to charge the batteries Follow the charging instructions supplied by the battery manufacturer to ch
18. a free field to a 1 kHz tone will be slightly different from that of a pressure field Also some calibrators are affected by the physical size of the microphone changing the volume of the calibrator s cavity The wind screen has an effect on the free field response at 1 kHz However this can be compensated during calibration Table 6 Calibration corrections for the CEL 251 and CEL 252 microphones Calibration Level Calibration Level Correction no Wind Correction with Calibrator Screen Wind Screen IEC 60942 Casella CEL 110 1 0 1dB 0 0dB Type 1 Casella CEL 110 2 0 1dB 0 0dB Type 2 Bruel amp Kjear 4231 0 1dB 0 0dB Type 1 approved Cirrus CR 515 0 1dB 0 0dB Type 1 approved Examples The CEL 63x instrument can be calibrated at a nominal level of 94 dB or 114 dB depending on the type of calibrator used e Ifyou use a CEL 120 1 or CEL 120 2 calibrator and the certified output from the calibrator is 113 98 dB and you intend to use the instrument 78 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL without the wind screen then you must set the calibration level to 113 88 dB You must round this value to 113 9 dB o Calibrator level 113 98 dB o Correction 0 1 dB o Calibration level 113 88 dB rounded to 113 9 dB e Ifyou use a Cirrus CR 515 calibrator and the certified output from the calibrator is 94 04 dB and you intend to use the instrument with the wind screen fitted then you must
19. a run Q By e View results 9 I e Delete udis e Record Audio Notes e Event Data amp Audio e Printing Only available when printer CMC73 is connected View results The View results screens allow you to see the results of ER measurement runs that are stored in the CEL 63x instrument s wu M suh un ion 0 20 46 memory use duratio No Freefield IMPORTANT Note that the functions displayed on the View results screens are those that you define in the current measurement setup You can use the View results screens to review any measurement function 43 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Delete Delete The Delete screen allows you to delete a single run after you select it or you can delete all runs stored in the instrument A Delete run 005 Are you sure You can confirm or cancel the command to delete the runs but you cannot restore a run after you delete it Record Audio Note This allows audio notes to be added to a measurement if they 7 were not added when the measurements was started Press and hold the record key to record an audio note PRESS and HOLD REC to make VOICE NOTES NOTE If an audio note is already present this will overwrite the existing audio note A warning will be displayed accordingly if this is the case Event Data amp Audio This allows audio playback of any of the audio files associated eim Marker 2 Event
20. each run When the record key is pressed then a minimum of 2 seconds of audio will be saved and the audio will continue being saved up to the time the button is released Audio notes can be recorded before a run or any time after a run is completed within the memory results Record Audio Note on page 44 If audio notes for a run already exist then a warning is displayed and they can be overwritten by the new audio note If a user has selected to do audio notes before a run then when starting a run the meter will display the audio notes screen where P a user can record audio notes or skip to immediately start the iano VOCE NOTES run If the memory is low i e 90 or more full then audio notes before a run are skipped Likewise if start stop timers have samma been set to start the run in the future then again audio notes are gy E skipped Before run audio notes are only recorded for the first run in a sequence Audio notes can always be recorded for any run after the run has been completed even if the memory is low providing the memory is NOT actually full For Markers Marker record on all CEL 63X models e This will store when the marker key has been pressed see RELEET Marker screen page 32 Tm Marker event on CEL 632 and CEL 633 models When a marker key is pressed then audio is stored as described above and additional event noise parameters are also stored for the duration the marker key is pressed This is the same dat
21. full scale output corresponding to 96 dB Output impedance is approximately 2 2 kQ Load 63 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL impedance should be as high as possible and a coaxial connection cable of between 0 5 metres and 10 metres length should be used The AC output corresponds to the Z weighted response of the instrument DC output 2 5 mm stereo jack barrel ground ring DC output provided for chart recorders loggers and so on Some offset and scaling is necessary on the measuring system for accurate measurements Approximately 1 4 V DC full scale output corresponding to 140 dB Output impedance is approximately 2 2 kO Load impedance should be as high as possible The DC output corresponds to the A weighted fast time response of the instrument Note that the DC power input ground must be kept isolated from any signal ground 6 29 Available data sets A Broadband Cumulative and Periodic Results For each complete measurement run the instrument stores the following e Runstart Date and Time e Run duration e Run overload time e Run pause times e RunId e Instrument serial number e Current measurement setup data e The Last calibration before run started results e The First calibration after end of run results e The Overload and Battery fail flags e The Environmental indices LDN LDEN CNEL In periodic mode the following set of results is produced for each of
22. instrument model additional frequency bands and s 33 statistical values may be viewed by using the navigation keys to eee scroll the display Graph screen The Graph screen shows a graph of the CEL 63x instrument s measurements taken over a period of time The graph has a horizontal scale of time and a vertical scale of sound pressure level dB The more recent measurements are to the right of the graph The graph scrolls slowly to the left during the Run Measurements that are older than the displayed time span disappear at the left end of the graph The Graph screen also shows measurements digitally using different functions Marker screen The Marker screen allows you to tag noise data with a specific identity using one of four markers For example you can tag the data to identify it as noise from an aircraft or from a road vehicle BD 48 36 24 12 Secs ai id Mark b 3 Back erase By pressing Pause when cumulative measurements are being made back erase becomes available The back erase option allows you to remove up to the last 10 seconds of noise data from the cumulative result Note that if the measurement has not been running for 10 seconds back erase will erase up to the start of the measurement The functions viewed on this screen can be changed NOTE On CEL 632 and CEL 633 models audio recording if selected will occur together with a separate event measurement when a mar
23. octave measurements on B amp C models Setup The CEL 63x instrument has up to six fixed measurement views and two user defined measurement views Measurement View This screen allows you to set a fixed measurement view or a LAM user defined measurement view acc sn 5 Environmen tal 1 6 Environmental 2 The fixed measurement views have functions that are defined to 2597 meet national regulations You cannot change these functions This screen shows the measurement view that is active and allows you to select a different measurement view 33 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL User settings The table below lists the functions that you can change in a user defined measurement view This table also shows the range of each setting Refer to section 4 4 Measurement views on page 48 for an explanation of the User 1 and User 2 settings Table 1 User settings User function Range Average sound pressure level o dB or 70 dB to 90 dB Lavg threshold Sound field response Freefield Random Octave weighting A C or Z Octave time constant F fast S slow Sound pressure level SPL Lar Las Lar Equivalent continuous sound L eg Lzeq pressure level Leq Lareq Laeqrao Maximum and minimum Larmax Lerma Lzkmax sound pressure level BE PE n LZSmax Laimas Lerna Lzimax Lar min Lermin Lzrmin Lasmin Lcsmin Lzsmin Lamin Letmin Lzimin Pe
24. period of time more than one month e Donotallow the instrument to become wet or to be exposed to extreme levels of dust heat or cold 68 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 8 Servicing and Warranty arrangements 8 1 Inspection and test To make certain the CEL 63x instrument conforms to its published specification the instrument is tested thoroughly and its accuracy is verified before shipment from the factory All technical information about each individual instrument is filed under the instrument s serial number which you should include in any correspondence concerning this instrument 8 2 Lifetime Warranty Terms and Conditions This warranty provided by the manufacturer does not adversely affect the statutory rights of the purchaser against the seller and gives remedies in addition to those against the seller under the contract of sale Casella CEL warrants for the products stated below of their manufacture 1 24 months from the date of invoice to the original purchaser 2 Thereafter for the production lifetime of the product subject to regular calibration as detailed below Casella CEL undertakes that each new product supplied thereon by Casella CEL as original equipment will be free from defect in material or workmanship according to the state of the art under normal use and service for the production lifetime of the product The warranty is valid for the original purchaser
25. screens e The Values screen e The Graph screen e The Marker screen All the measurement run screens show the Run number and the Run duration Each screen also has a pause control Il and a View option Select the View option on each screen to change from one screen to the next Main screen The Main screen shows measured function values numerically and as a series of bars against a vertical scale Ln s screen The Ln s screen shows statistical Ln measurements for the run f E Depending on model refer to Statistical values on page 54 Lus 355 Laws 36 0 Laras 35 5 60 lates 355 LET f View Qctave and 1 3 Octave screens The Octave and 1 3 Octave screens show measurements for the octave or 1 3 octave spectrum bands and A C Z values You can use the navigation keys to select individual bars on the screen The screen shows the following measurements digitally B so ZCA 16 63 250 tk Sk 16k ET A View e The centre frequency of the selected octave for example 2 kHz e The sound pressure level dB of the measurement in the selected octave e The name of the measurement function for example La 31 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Values screen The Values screen shows a list of the centre frequencies for each octave or 1 3 octave and columns of measurements for example to show Laegq Larmax for each of the centre frequencies Depending on
26. set the calibration level to 94 04 dB You must round this value to 94 0 dB o Calibrator level 94 04 dB o Correction 0 0 dB o Calibration level 94 04 dB rounded to 94 0 dB Refer to section 3 4 Calibrating the instrument on page 13 for instructions to set the calibration level and calibrate the instrument 10 2 Response characteristics Table 7 Casella CEL 63X with CEL 251 Microphone Free Field response with and without Wind Screen 2 P K Bee Expanded 5 0 Degree 0 Degree ree Field ree Fiel uncertaint Moe pa Fete Peso ENR Response Corecions ot Response Corrections with wind with Wind Corrections Screen Screen k 2 Hz Hz dB dB dB dB ol 3 ol 250 251 19 0 2 0 2 0 0 0 2 0 2 0 16 315 316 23 0 2 0 2 0 0 0 2 0 2 0 16 400 398 11 0 2 0 2 0 0 0 2 0 2 0 16 500 501 19 0 2 0 2 0 0 0 2 0 2 0 16 630 630 96 0 1 0 1 0 0 0 1 0 1 0 17 800 794 33 0 1 0 1 0 0 0 1 0 1 0 18 1000 1000 00 0 1 0 1 0 1 0 0 0 0 0 19 1250 1258 92 0 0 0 0 0 1 0 1 0 1 0 19 1600 1584 89 0 0 0 0 0 2 0 2 0 2 0 20 2000 1995 26 0 0 0 0 0 2 0 2 0 2 0 21 2240 2238 72 0 1 0 1 0 3 0 2 0 2 0 21 2500 2511 88 0 2 0 2 0 4 0 2 0 2 0 21 2800 2818 38 0 1 0 1 0 4 0 3 0 3 0 22 3150 3162 27 0 0 0 0 0 5 0 5 0 5 0 22 3550 3548 13 0 1 0 1 0 5 0 6 0 6 0 23 4000 3981 07 0 2 0 2 0 6 0 4 0 4 0 23 4500 4466 83 0 1 0 1 0 6 0 5 0 5 0 25 5000 5011 86 0 1 0 1 0 6 0 5 0 5 0 26 5600 5623 40 0 3
27. the period intervals during a run In cumulative mode the following single set of results is produced covering the whole run 64 Casella CEL CEL 63x Environmental amp Occupational Noise Meter e Sound pressure levels SPL O O O O O O 0 0 0 Lar Lcr Lzr Las Lcs Lzs Lat La La CASELLA CEL Note that the SPLs are displayed but are NOT stored e Equivalent continuous sound pressure levels Leq O O OQO 0 0 Laeq Lceq Lzeq Lareq Lc La LAeqr8o e Maximum and minimum sound pressure levels O 000000 0 0 e Maximum and Minimum times Lar max Lermax LzFmax Lasmax Lesmax Lzsmax Latmax Letmax Lzimax Lar min Lermin Lzrmin Lasmin Lesmin Lzsmin Latmin Lemin Lzmin The time for each of the 18 maximum and minimum sound pressure levels is stored to 1 second resolution e Peak sound pressure level O Oo O Lapk Lepk Lzpk e Peak times The time for each of the three peak levels is stored to 1 second resolution 65 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL e Average sound pressure level with exchange rate Q O Lago O Lavg Qs each with threshold o dB or 70 to 90 dB e Other measurements O Larcrms Larcrms Latcrmg Latcrms Lag O O0 O e Statistical parameters Ln O Lario Larso LaFoo Lagos Larvariable o Lerio Lcrso Lcroo Lcros Lcrvariable O Lzro Lzrso Lzroo Lzros Lzr variable e Event Data O Lara
28. this line is ov or less then output is Paused and when at 3 3v or higher then output resumes XON XOFF This uses software handshaking The Receiver sends a XOFF character ASCII 19 to pause the RS232 output and XON character ASCII 17 to resume output NOTE RS232 Output is also paused when the CEL 63x does not get a valid RXD RS232 level from the receiver TXD line so there MUST be a valid RS232 level on this line from the receiver even when handshaking is set to None Removing the cable will also pause the RS232 output The CEL 63x Rs232 interface has 32 byte buffers so when the handshaking pauses the output then up to 32 further bytes can be transmitting before the pause actually occurs 84 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Output Periods This gives the option to Output Period Results or not see below 1 1 Octave 1 3 Octave Leg If the meter is a B or C variant and Output Period results is selected this allows a period Leq of each octave or 1 3 octave frequency to be output with the period results Online Mode This enables or disables Online mode NOTE Online Mode will ONLY operate when the Meter is in Periodic mode i e Periodic mode is set in the Measurement Control Data Sets Menu If Cumulative mode is selected then Online Mode will be ignored as if it had been disabled Results Output Normal Results Output All Results lines are output in
29. time constant Leg Leq is the equivalent continuous sound pressure level It is an average of the total sound energy measured over a specified period of time It represents the level of a steady continuous noise that has the same total energy as the real varying noise measured over the same period The functions highlighted in green are the other functions that are selected for display during a measurement run The Leg subscript identifies the frequency weighting used when calculating the Leq function for example Lc is the C weighted Leg 52 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Other functions listed under Leg are as follows Lateq is an integrating A weighted measurement of impulse Leg Integrated measurements provide an Leq measurement that assesses exposure to noise levels and are used in the calculation of the personal noise exposure Lz as defined by ISO 1999 Lc LA is a measurement that is used in the HML method where separate values for high medium and low frequencies provide a better estimate Laeqrgo is an A weighted measurement of L4 that has a threshold setting of 80 dB This is used for ACGIH in the USA only Maximum and Minimum SPLs This screen allows you to select among the available maximum TON and minimum SPL functions rere ise iae lCFmin LZFmin The subscripted letters identify the frequency weighting and the e tzsmin time constant to be us
30. to determine which period functions are output The Octave Z C or A weighting applied to the octave and 1 3 octave Legs is also selected here so that Lz or Lceq or Laeq can be output for each band 83 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL B To set Profiles Only 1 Disable Output Periods in the Online Menu above 2 In Measurement Control Date Sets menu then select Set the required Periodic Interval Set required Profile Interval Set the Profile functions required C To set Both Periods and Profiles This is same as A except in step 3 then set the required Interval to the required time and set the Profile functions required Baud Rate Set the required RS232 baud rate for transmitting and receiving data 1200 2400 4800 9600 19200 38400 57600 or 115 200 baud Handshake This can be set to None Hardware or XON XOFF The receiving device can pause and then continue the CEL 63x RS232 output using handshaking The CEL 63x can always buffer over 24 hours worth of readings i e up to 10Mbytes of results so a receiver using handshaking could pause the RS232 output for a few seconds or even a day without losing any data If the profile times and period times are set to longer intervals then the meter can buffer many days or even weeks of output Hardware This uses the DTR RS232 signal from the receiving device on pin 4 of the 9way Female D type connector When
31. useful when the instrument is used together with the environmental kit case This enclosure supports a higher capacity battery for short to medium term environmental measurements 19 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Figure 7 Measurement controls i Measurement Duration cI 4 6 gt gt lt 3 4 gt 5 4 gt 7 4 gt gt 4 T X Tue 08 00 17 00 gt T4 X Wed 08 00 17 00 T5 X Thu 08 00 17 00 T X Fu 08 00 17 00 Repeat X 20 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Measurement data sets The data sets option controls how the CEL 63x instrument records measurements during a run There are two options that you can choose e Cumulative measurements e Periodic measurements Both options can be used with Profile recording Figure 8 Measurement data sets NEL HEN zao ae for O hem Interval 2 Seconds SG g s gt f Cumulative measurements A cumulative measurement produces sum l SUP E a single set of results for the entire measurement duration When you use the CEL 63x instrument in cumulative measurement mode the start and stop times depend on whether you have selected Key press Fixed duration or Timers for the instrument 21 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL The cumulative dat
32. with a measurement from any markers and events where audio was stored Dunstin mia 4 I a During playback the output volume can be adjusted by pressing Sa the up or down cursor The right soft key will take the playback to LCNMEN NEN the beginning Stop and Start by pressing stop start Up or down will step through the audio files except when the audio files is being played Printing The CEL 63x has two different methods of printing measurement results using a 3 inch thermal printer CMC73 Print Report prints a measurement run report and Print Screen prints a copy of any of the result screens Both options print in the currently selected language NOTE If you are using the printer for the first time with the CEL 63x refer to Printer set up on page 46 before you start While the printer CMC73 is connected to the CEL 63x instrument and is switched on then a Printer icon is displayed on the Memory results screen Select this Printer icon to display the Print Report options for the current run and to print the report or follow the instructions in Print Screens on page 45 to print some screens Print Report Select the Printer icon to display the Print Report Options screen 44 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL This screen has the following options e Own Logo This option prints a stored user logo before the report see later for details e Octave L4
33. 8 25 0 27 0 Note that the CEL 252 microphone has a typical thermal noise level of 20 dB A When using the CEL 252 microphone the combined typical and maximum noise levels will be 3 dB to 4 dB higher than the values shown in the table above 76 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 9 Highest level Using the microphones CEL 251 and CEL 252 the highest sound pressure level that the CEL 63x instrument has been designed to measure is 140 dB These microphones have a nominal sensitivity of 50 mV Pa The highest peak to peak voltage that can be applied safely to the pre amplifier s input through the CEL 516 2 line input adaptor is 28 5 V For high range instruments using the CEL 259 14 inch high range microphone and CEL 259 A 1 2 inch to 14 inch adaptor the highest sound pressure level that can be measured is 165 db 10 Power supply voltage range The CEL 63x instrument can be powered from three internally fitted AA batteries or from an external 12 V DC supply through a 2 1 mm connector tip is positive The instrument can also be powered from a 5 V DC supply through a USB connection to a PC e The DC supply range is 9 V to 14 V e The USB supply range is 4 5 V to 5 5 V When operating from internal AA batteries the battery voltage range must be from 3 V to 5 V e Abattery condition symbol on the instrument s screen flashes a warning when the battery voltage falls to 3 3 V or lo
34. 9 50 Casella CEL CEL 63x Environmental amp Occupational Noise Meter Figure 12 Elmo ABO LAVG threshold o gt Response Freefield Octave weighting A Octave time const F Load defaults No Variable Ln Value Other Measured La Values HEN us Im Im Press 1 1 Oct 4 as 3 4 gt LEQs BEIE eum Presa w m iet vi mam value as 13 gt A oe 11 4 E v 12 Variable Ln Other Measured Ln Values 20 4 M9 gt w 21 25 4 gt v 24 View 1 150 EU 2 OSHA USA 3 ACGIH USA 4 DOD USA 5 Environmental 1 6 Environmental 2 8 User 2 CASELLA CEL User defined measurement view View Active 1 180 EU 2 OSHA USA 3 ACGIH USA 4 DOD USA 5 Environmen tal 1 6 Environmental 2 8 User 2 6 7 gt gt ES Z3 R s E Max Min SPLs Peaks LCFmax LZFmax ow IBTNEN oe LASmax LCSmax lZSmax LAVGs LAimex LCimax LZimax LAvg 04 LAvg 05 gt EE cem rm P dier LASmin LCSmin LZSmin LAFTm3 LAFTmS5 LAE LAtmin LClmin Limin LA Tm3 LAITmS DMTITIMEE CUIIIMM up wee mee UN eu ene aa Saag 16 19 E j as ag A 14 NS 17 4 o at as Y 15 Y 18 The CEL 63x instrument has four screens that show the functions available for selection 1 The first screen shows Sound Pressure Levels SPLs and Equivalent Continuous Sound Pressu
35. 9 4500 4500 44 5000 5001 09 5600 5601 32 6300 6301 15 7100 7100 57 8000 7999 58 8500 8500 23 9000 9000 88 9500 9498 83 10000 9999 48 10600 10599 72 11200 11199 96 11800 11800 20 12500 12500 02 Maximum expanded uncertainty of above data with 95 probability k 2 e 500 Hzto 1 kHz 0 3 dB e 1kHzto4KkHz 0 5 dB e gt 4kHz to 8 kHz 1 0 dB e gt 8 kHz to 12 5 kHz 1 5 dB 82 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 10 3 Data and Protocols for Online Mode The feature is available in all variants A B or C of the CEL 632 and CEL 633 instruments running in broadband Octave or 1 3 Octave band When Online mode is enabled and the Measurement Mode is correctly set for Online mode every time the CEL 63x is switched on it will automatically start a run and try to output the results to RS232 providing a USB host is NOT connected If the Casella CEL 63x RS232 cable part no 196138B is not connected or the receive has paused output using handshaking then the Online mode will buffer the results until the cable is connected and handshaking has stopped pausing the output The CEL 63x can buffer at least 24 hours worth of RS232 profile and period results up to 10MBytes of ASCII data Apart from the automatic start of arun and output of results to RS232 the meter will perform as normal so runs can be stopped started and calibrated etc Onl
36. E Whichever setting you use for octave weighting the CEL 63x instrument only stores Z weighted measurements This allows you to transfer measurements to a PC for post processing to A or C weighting using the Casella insight software Refer to Mini B USB port on page 55 for information about connecting the instrument to a PC 49 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Octave time constant The setting options are for F Fast or S Slow octave time constant This setting defines the time weighting used to display octave or s octave band results and how quickly the CEL 63x instrument responds to changes in sound pressure level Most measurements are made using the Fast octave time constant When using this setting the instrument applies a 1 s second 125 ms time constant to the sound pressure level Fast measurements are identified by using the subscript F for example Lar shows the sound pressure level using A weighting and the Fast octave time constant When you set the instrument to use the Slow octave time constant it applies a 1 second time constant to the sound pressure level Slow measurements are identified by using the subscript S for example Las Measurement functions You can select up to nine measurement functions for each user defined measurement view The bottom of the screen has a counter to show how many functions you have selected for example 7
37. Environmental amp Occupational Noise Meter CEL analysis and graphing tools which you can use to analyse and view measurement runs Contact Casella CEL for more information about the insight program AC and DC output port The AC and DC output port is a 2 5 mm stereo jack It has two functions The tip connection 4 provides an AC output from the instrument 3 You can use this output for remote monitoring and for providing a 2 signal to a separate recording device or headphone amplifier A 1 The AC output level is approximately 0 4 Vrms full scale which corresponds to a sound pressure level of 96 dB with AC Low Output selected refer to the note on page 26 for more information The output impedance is approximately 2 2 kO The AC output corresponds to the Z weighted response of the instrument If you use the AC output you should make certain the load impedance is as high as possible and you should use a co axial cable of length 0 5 m to 10 m The ring connection 2 provides a DC output voltage that is proportional to the measured sound pressure level The DC output voltage is scaled linearly at 0 01 V dB with a maximum value of 1 4 V DC which represents 140 dB The output impedance is approximately 2 2 kO The DC output corresponds to the A weighted fast time response of the instrument If you use the DC output you should make certain the load impedance is as high as possible The signal ground for the AC ou
38. L CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 5 Linear operating range Table 4 shows the lower and upper limits of the linear operating ranges for electrical input or when using a CEL 251 microphone You should add 10 dB to the lower limit shown in this table when using a CEL 252 microphone Table 4 Linear operating range Weighting 31 5 Hz 1 kHz 4 kHz 8 kHz 12 5 kHz 30 to 100 30 to 140 30 to 141 30 to 138 30 to 134 32 to 137 32 to 140 32 t0139 32 to 136 32 to 132 38 to 140 38 to 140 38 to 140 38 to 140 38 to 140 C Peak 65 to 140 65 to 143 65 to 142 65 to 139 65 to 135 6 Linearity measurements starting point The starting point for measuring linearity errors is 114 dB 7 Electrical input The input device to apply electrical signals to the pre amplifier is a series 18 pF 5 capacitor You can use the CEL 516 2 line input adaptor for this purpose The electrical self generated noise can be measured with the supplied shorting plug attached to the CEL 516 2 8 Self generated noise Self generated noise is a combination of microphone thermal noise and the instrument s electrical noise Table 5 shows the self generated noise levels for a range of conditions Table 5 Self generated noise using a type CEL 251 microphone Weighting Electrical Electrical Microphone Combined Combined Typical dB Max dB Thermal dB Typical dB Max dB 15 0 17 5 16 0 18 5 20 0 18 0 21 0 16 8 20 6 23 0 24 0 26 5 16
39. Upper Lower cutoff cutoff Lower cuon Centre frequency Centre frequency frequency Hz cy d he rend Hz frequency Hz Hz 22 44 42 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Memory results The CEL 63x instrument has 2 GB of memory that is available to store the results of the instrument s measurements The Results memory stores all measurements made when the CEL 63x instrument operates in the measurement run mode Date 26 Sep 11 The first screen shows the dates of the runs stored and how many runs are stored for each date You can select any date in the s seus 5 list to view a list of the runs stored for the selected date a Se The daily results screen shows a list of results identified by their Run ID numbers stored from a single day of measurements Each entry in the list shows the time when the run started and the run s duration The screen always lists the runs with the newest at the top NOTE Measurements that have an audio file stored will have a headphone symbol to show audio files are present You can select one of the runs to see the summary and the details for that run A series of screens shows information about the run s measurements A graph icon shows that the run includes a profile time history Refer to Data sets on page 37 for an explanation of the periodic time history There are five options available when you select
40. W 3 4 Calibrating the instrument The CEL 63x is a precision measuring instrument You should calibrate it before each measurement run and again after each measurement run so that you can be certain its measurements are accurate To calibrate the instrument you will need a suitable calibrator that generates a 1 kHz reference tone Depending on the type of calibrator the reference tone can have a nominal sound pressure level of either 94 dB or 114 dB Check the information supplied by the calibrator manufacturer to find the exact sound pressure level that the calibrator generates 13 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Each measurement run stores both the before run and the after run calibration results including any changes in the calibration This confirms the absolute accuracy of the measurement NOTE It might be necessary to change the calibration reference level so that it includes the pressure to free field correction applicable to the fitted microphone For Casella microphones and assuming a 114 0 dB nominal calibrator pressure the reference level should be as follows CEL 251 or CEL 252 114 0 dB if using windshield CEL 251 or CEL 252 113 9 dB without windshield 1 Remove the windshield from the CEL 63x instrument s microphone 2 Press and release the ON OFF key to switch the instrument ON 3 Wait approximately 10 seconds until the instrument s initialization
41. a a e e ea ea aea a ae OO Frequency reSponSe sssssssseesssssssssseeesssssssseeessssssssseesesssssssseesesssssssseseesssssssseeeesssssssssssesss OO Tite WelgDtilig S etes rtr nro rete einem mtem Diii OL Correction TIILetS i oicis erae ce i eoe E TRES RENE RR EROR ARTE EN E SURE TA en ERE e ca etu a coe caste OL Reference direction aste n ie ie itte erinnere ie nire tnieia O1 Reference conditions ccsccesssecessccsscecsssecesscecssssecssnecessescesseecssseceseecessseessseessesesseee OF Operating environmental conditions eese eene OF Effects OF temperate ioo eo eto ERE ERREUR e O1 Effects of NUMIA cesis cix rr rrr rtr Er Lr ri rro i catu O L 3 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 6 17 Storage environmental conditions eeeeeseeeese sees eene eene eene nennen seni 61 648 Microphones isses sert rator eth eto arta So TREE ERU EXPERS SEXE RARE ERE ELSE ERE LESS XXE ERES SER ERR eaaa 62 6 19 MEET o o REM 62 IB udi 62 6 24 Internal Clock resessie iaaiaee aaa iaaii aeaii 62 622 Languages aaee Ee S E E AO E A E E AAE E E AN EA EE E E DEEERRREENR 62 6 23 Electromagnetic compatibility sssesseeseeeseseesseessessresssossseesseesseesssessseesseesseesssessseesseess 63 6 24 Effects of AC power frequency fields cecsssecesssccesccessseceseeecesseceseecesseeessneeessneeess 63 6 25 Tripod mounting ccsesecessccessceessnecesscecessc
42. a as for triggered events see Event setup 40 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL NOTE If Pause is ON or a Level or External event is in Progress when the marker key is pressed then ONLY a marker record is produced NOTE When pressing Pause and Back erase this also will create Pause and back erase marker records which show when these actions were performed and will be displayed on insight data management software For Events The meter will capture up to the first 910 seconds of audio for an event If a pre trigger is set then the audio will be saved from before the event started and will continue until the event ends or in the case of level events it will continue until the end of the stop event time after the event This allows 10 seconds of pre trigger plus 15 minutes of event recording When the 910 seconds 15 minutes and 10 seconds of audio is captured then the audio file is completed and the meter will continue to capture the event data up to the maximum 24 hour event time NOTE An audio file is NOT saved for an event if there is NOT more than 2 seconds of audio NOTE Multiple audio files cannot be recorded simultaneously so if the audio is already being recorded for a marker any event will be disabled until the Marker key is released Quality The CEL 63X stores standard WAV audio files A user can set audio capture to be high quality 24 000 samples a second at 8bit res
43. a set alone does not provide time history information To include time history information for the measurement you can enable Profile recording Profile recording i Sto A profile recording consists of a series isi i Cumulative P of fast measurements made at the same time as a cumulative 1 2 3 Profile n measurement The profile recording supports a more limited set of functions including Laeg Lareq LCpk Larmax Lasmax Lamax and optional Ln statistics Broadband Fast A weighted Lns only When you use profile recording you can set the interval of each of the profile measurements to one of the following e OFF e 100msS 1 2 5 10 15 20 30 or 60 seconds e 2 5 10 15 20 30 or 60 minutes NOTE When used with periodic recording the profile interval can only be set to a sub interval of the cumulative measurement duration to produce an exact number of profile samples per period Periodic measurements Periodic measurements allow the total measurement duration to be divided into separate fixed time intervals In Periodic mode a full set of results is stored at the end of each time interval whereas in Cumulative mode a single full set of results is stored at the end of the measurement run In effect the original full set of cumulative results is captured at periodic measurement intervals Figure 9 Repeating cumulative and profile data sets Start Stop Period 1 Period 2 Period 3
44. ak sound pressure level Lapk Lepk Average sound pressure level Lavgo4 Lavg as with exchange rate Q Other measurements refer to Larcrms Lar Tm5 Measurement views on page Larrm3 Larcrms 48 Statistical functions Ln E Ln variable Environmental indices LDEN 34 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Set Clock The CEL 63x instrument has an internal clock which allows the instrument to record the date and time of each measurement ideal The Set Clock screen allows you to set the date and the time and to change the settings when necessary Language NI The CEL 63x instrument can display the screens using any of nine languages When you change this setting the instrument also changes the format used to display some information for example the date le Y V k iiaii ik The language options are as follows e UKEnglish e US English when using this only the date format changes e Brazilian Portuguese e French e German e Italian e Portuguese e Spanish e Chinese Backlight The CEL 63x instrument has a display backlight The backlight Activation ME allows you to use the instrument in poor ambient lighting a conditions or in darkness The Backlight screen allows you to change the following backlight s settings tui 7 E e Set the backlight permanently ON or set the backlight to come on after a key press
45. ancGasesnectasecnstseseeususesesesdsacesesdcacesesduneeseiecnetely D Power IM PUT POM 3 s ecccesessiecesestsececdessececcesececesaucecesddasccesedscecesedscececedeaucceedeaveceedenveccesenvtaceas 5 5 Mini B USB POTU scsssssccissssesccsssseesesssseesessssvesaasesvesaacsavesaavsseesaasvenssecsssaeeeasseseesasssenes assennnaas 55 AC and DC output port 0 ic cccssscccssssteccesssseccessseseccsssssecssssnsecssssessessssssessssseseessssetees D Mode Selection SLM Online NNR eene eene rne enns enne erneeeneeess 57 ICTTIISETDREEDRULUULOIOLLOLODL OLANDESE AN 7 SLM MOUE rr ter ert rrtmeHe iiti i i aT Online Mode cee eesssecesssccescecsssecesseecessceesssccessnecesssecesseecsseecesseecesseeesssecesssecesseecsseeesses D7 ANR MO E A EA ARAR EN EE tune D A Mintlpnelin frr 0O Generale reme Rn enema Standalids aneaneedenudiadmiutedenestusedsnaduniuieduauiamebmiunabo Meas rement Tarige iiec io cic ecen eee Ee Ee RR aaa ana OO RMS frequency weightings cccssscccesssssccesssrscccssssscecesssssecsesseseesessesseesssseseesessessesees OO Octave and 1 3 Octave MEASUFEMENL ccessscsssscesssscessssssssscessscessssesssssesssssessssessees OO Peak measurement ccessecccssssscccssssscecessnscecessssseccessesseceesusecsessessecessessecssssesecsessssesees OO RMS detectOI au SERESRCRERRESDENUUNDUNREURERUENEHEDUDDUI ID E OO NoiSe MOOR ereet ee anaa asa aa E ena Eea E a anaa na e
46. arge the batteries USB supply When you connect the instrument to a PC through a USB cable the instrument receives power to operate at 5 V DC from the PC There is no need to use a mains DC power supply to operate the CEL 63x instrument when you connect it to a PC Battery condition indicator When the CEL 63x instrument receives power from a mains DC power supply or from a USB port on a PC the battery condition symbol on the instrument s screen always shows a fully charged battery condition even if the batteries are not fully charged 11 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 3 2 Using the controls The CEL 63x instrument is designed to allow easy operation The instrument has only seven 7 control keys shown on the right These are as follows e The Soft keys A and B e The Navigation keys C v 4 e The Run Stop key D gt m C D The instrument is small in size and it is usually possible to hold and operate it using only one hand For safety you can attach a wrist strap near the bottom of the instrument The simple descriptions below show the purpose of the user control keys Refer to Section 4 2 User controls on page 24 for a full description of the user controls Soft keys The Soft keys A and B allow you to select between the two options showing at the bottom of the screen These two options change depending on which screen is showing on the instru
47. ate and the check the performance of sound level meters and noise dosimeters The standard unit for measuring sound level and noise exposure A weighted sound level in decibels A weighted measurements are shown by using the subscript A A standard weighting of audible frequencies designed to imitate the response of the human ear to noise C weighted sound level in decibels C weighted measurements are shown by using the subscript C C weighting is a weighting used in the Control of Noise at Work Regulations and applies only a relatively small correction to very loud noise sources Z weighted sound level in decibels Z weighting applies no weighting to the frequency of measurement It is a raw measurement of sound level across the complete frequency range of the instrument A standard time weighting applied to measurements Most measurements are made using the Fast time weighting When using this setting the instrument applies a V s second 125 ms time constant when calculating the sound pressure level Fast measurements are identified by using the subscript F A standard time weighting applied to measurements When using this setting the instrument applies a 35 ms 72 Casella CEL CEL 63x Environmental amp Occupational Noise Meter Lar A weighted exposure level Laeq A weighted equivalent continuous sound energy level also Leeq Lzeq Lar also Las and Lar Lasmax also LaFmax
48. be transferred to a computer by USB 2 This example is a single cumulative measurement shown as a dark blue line together with a profile channel shown as a light blue line The profile channel consists of a series of many measurements captured at the same time as the single cumulative measurement You can set the profile interval from one second to 60 minutes 3 This example shows periodic data sets as a series of dark blue lines and the profile channels that go with the periodic data sets as light blue lines The Casella insight data management software is used to combine and graph the periodic data Event setup There are different methods to start and stop the CEL 63x events e Level Triggered Events Event Setup Level events are triggered when a sound level function Event Sta exceeds user defined thresholds for a user defined time vensu e External Triggered Events en ENTE External events are triggered via an external signal from an external button or a line The normal mode of operation for this is in Noise Nuisance Recorder NNR mode Level Events Level events allow the meter to capture loud or quiet periods of measurement where a user can set a start event dB threshold and onset time in seconds as well as an end event dB threshold and off time number of seconds Parameter Level trigger events can be triggered from a choice of parameters Lar Las Laeq Leeg Lzeq Lzpeak Lepeak 38 Casella CEL
49. cccesccesssscccessseccceesssccscesseeescesseeeceeseeeeceeses 83 4 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 1 Introduction The CEL 63x series is a family of noise meters where x is a digit that indicates the model variant see Figure 14 on page 59 These are powerful measurement tools to support a wide range of industrial health and safety and environmental noise measurement requirements For a breakdown of the different models and their functionality refer to section 6 Specifications beginning on page 59 The CEL 63x instrument uses the latest digital signal processing technology to provide a full range of functions including integrating and real time octave and 1 3 octave band analysis The CEL 63x instrument uses a colour TFT screen to show a range of information including operating menus and messages warnings and the results of measurements The screen is clear and easy to read under all ambient lighting conditions including total darkness Measurements captured by the CEL 63x instrument conform to international standards for acoustic measurement The measurements are saved automatically in high capacity internal Flash memory You can transfer the measurement results to a PC where you can manage the results and create reports by using the Casella insight data management software Audio recording is available on all CEL 63X models Audio notes are available on all models to a
50. cessnecesseecsseeecssuecesseecesuecesseecesseeessneeessnecess 63 6 26 DISDIAY AIC e 63 0 275 MEMON oere EEEE EEE AE EEEE EEEE EEEE EEE 63 6 28 Connectivity msresssssessersssrrersssrssesrnss errereen sonnen nannu anane 63 6 29 Available data sets esonesssessseesseesseesseessseesseesseesseesssessseesseesseessoessseesseesseessoessseesseeso 64 630 Physitasicescceso cie cuiu eene a DI REIR UOI EC EEUU NS SOIN EC E EG EE EAS Ee ER EER E GN 67 10 8 1 8 2 8 3 8 4 10 1 10 2 10 3 Care and maintenarice 2 22 0 22 2 5022 0225 22 0222022052100025 2 00 0 0050002000 0 5000 50 005 6B Servicing and Warranty arrangements eeeeeeeee ee eere e eere eee ene eee se eese seeeee s OD Inspection and TOSEsssesececesssic cess ccceseesccceeess decceedeacecceveduee aE 69 Lifetime Warranty Terms and Conditions cesses eese eene eene nnne 69 MSIE ERAI UN EUER 70 User Servicitigin eonun E E E und une ud 7A GIO SSA Mee T d Additional TifOr gl lONku oic opcion o epu d bL Y Cubo Nen Cr cup en EU Pos CHR eo EK UY Cu Uga Cru i Tu subi p o Scrap U cepa 75 Sound calibrators Level corrections ccccccccssssscccesssecccessseccceesseecccessececessseeeseesseees 78 RESPONSE cliaracteristiCo eee etre a esee aede neue e dades la eee de E EXER SRS 79 Data and Protocols for Online Mode u c
51. d while Online mode is selected then these parameters cannot be changed a Event and Marker Audio capture are both disabled b Event Profiles are disabled c External events are disabled d Period mode is always selected Please see section 10 3 for details on the data and protocols used in online mode 5 4 NNR Mode Noise Nuisance Recorder NNR mode is used within the Stealth Noise Nuisance Kit On power up of the instrument NNR mode automatically steps through certain screens to enable a quick start up This is designed to simplify noisy neighbour applications While NRR mode is selected then the following settings are forced on 1 External events are enabled 2 Event audio capture for events is enabled using the currently selected high or low quality 57 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 3 10 seconds pre trigger is set 4 Capture of Voice notes before a run are enabled In this mode when the meter is switched on then the CEL 63X automatically enters calibration mode If a calibration is not done after 30 seconds this will time out then the meter will switch to allow Audio notes to be recorded Again this will time out after 30 seconds and automatically start a measurement so if no keys are pressed during the power on sequence then the meter will start a run after just over a minute This mode is designed to be used with a Stealth Noise Nuisance Record Kit Whenev
52. ding will continue until either the maximum time up to 15 mins is reached or if the minimum time absolute o seconds is reached from the time the button was pressed Calibration reference level Sa The calibration reference level screen allows you to set the CEL 63x instrument to use the same sound pressure level as the calibrator 1140 dB Documents supplied with the calibrator should tell you what S du sound pressure level it delivers at the 1 kHz reference tone This will be in the range 93 dB to 95 dB or in the range 113 dB to 115 dB This screen allows you to set the instrument to the same calibration level to an accuracy 0 1 dB 39 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Audio Recording There are five main options in the Settings screen e Audio Notes allows you to speak into the microphone to For Events 4 record verbal details about a measurement run e For Markers allows you to select one of 4 markers which will start a marker record and a marker event depending i on the model e For Events allows you to enabled or disabled audio capture for level and external triggered events e Quality allows you to set the audio capture to either high or low quality e Pre trigger allows up to 10 seconds of audio to be recorded prior to the start of an event Audio Notes Audio notes are always recorded in low quality and will record between 2 and 120 seconds of notes for
53. e warranty The product must be returned within 30 days of either the expiry of the 24 month initial warranty and or the date of invoice of the last calibration Casella CEL is a brand name of IDEAL INDUSTRIES LIMITED a company registered with company number 01824671 whose registered office is at Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8XY t a Casella CEL whose principal place of business is at Regent House Wolseley Road Kempston Bedford MK42 7JY 8 3 Repairs The manufacturer undertakes to put right any defect in the instrument that is attributable to a fault in its design or assembly and which becomes apparent during the warranty period To take advantage of this warranty the instrument must be returned carriage paid to the manufacturer s factory or accredited agent where the necessary repairs will be performed To obtain repair under warranty the instrument should be packed in its original packing or an equivalent and returned to Casella CEL s local agent or in the case of UK domestic sales to the Casella CEL Service Department at Bedford Please include the following information e Instrument type s e Serial number s e Firmware version number s e Customer name and address e Contact name and telephone number e Details of any PC and software involved including version number s e The reason for returning the equipment with a detailed description of the fault and a list of any error message
54. e and time output is the date and time when that profile started NOTE If the profile interval is set to 100ms then Normal Online mode will output a 1 second profile to the RS232 output but save a 100ms profile to memory during the run Normal Period Result output every 1 minute to 24 hours If Period output is enabled then at the end of every period the meter will output a broadband Period result line If the 1 1 1 3 Octave Leq is enabled and the meter has octave or third octave filters then an Octave Period result line is then also output with 11 x Octave band Legs or a third octave Period result line is output with 33 x 1 3 octave Leqs If two lines are output then the dates and times will be identical and is the date and time of the start of the period that was measured Broadband Period Result line This is in format PER YYYY MM DD HH MM SS function1 valuei function2 value2 functionN valueN The broadband functions are those selected in the current Setup View These are the same functions which are displayed when recalling completed runs to the CEL 63x LCD Between 1 and 9 functions can be selected as well as 0 to 5 Ln functions giving up to 14 functions in total e g PER 2010 05 07 15 23 45 LAFmax 102 4 LAFmin 34 3 Lc Aeq 5 0 LaF90 65 4 NOTE The Instantaneous SPL function eg LAF is never output In Normal online mode NOTE All Broadband Period function values are in dBs and all functions exce
55. e instrument e Serial Number e Firmware Version You cannot make changes to the displayed setting Measurement stop screen The measurement stop screens show the current instantaneous sound pressure level Different screen views include the following e The Octave screen e TheGraph screen Select the View option to toggle between the two screens Select the Menu option to use the setup screens Refer to Menu screens on page 33 for instructions to use the setup screens 27 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Octave and 1 3 Octaves The Octave and 1 3 Octave screen includes an octave spectrum 0 0 2 graph showing instantaneous and maximum noise levels for u each filter band plus A C and Z broadband measurements Short lines above the individual bars show the maximum measurements for each filter band You can use the navigation cursor keys to select individual bars on the screen The screen shows the following measurements digitally e The centre frequency of the selected octave for example 2 kHz e The sound pressure level dB of the measurement in the selected octave e The functions used for the measurement for example Lar Graph The Graph screen shows a single line graph using a vertical scale 585 of noise level and a horizontal scale of time The bar moves up and down to show the noise level and the graph scrolls to the left to show noise level
56. e instrument e User defined details for example the user s name These details must be set up by using the Casella insight data management software PC software and then transferring them to the instrument Write the serial number and the firmware version number in a safe location You should give this information to the service agent if the instrument develops a fault NOTE m This screen also provides access to system tools These tools enable the internal memory to be reformatted allow setting the memory to be read write from the connected PC and allow setting the AC output on the bottom socket to output the low or high part of the dynamic range NOTE The system tools also allow selection of either 140 dB or 165 dB full scale modes On CEL 632 and CEL 633 three different modes SLM Online and NNR may be set Please refer to Mode Selection SLM Online NNR on page 57 for descriptions of these modes For standard operations use SLM mode 26 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Status The Status screen shows the following information about the instrument s current operating condition e The current date and time e Runs free e Percentage of memory free e The battery voltage Refer to Battery supply on page 10 for more information about battery types e The type of microphone response field the instrument is using e The pre defined setup used by th
57. e instrument is useful when you do not know the duration of a measurement run Fixed duration The fixed duration mode allows you to set the duration of a run You can set the duration in steps of one second in the range 00 00 00 to 24 00 00 HH MM SS Measurement Duration You must press the Run Stop key to start the run manually but the instrument will stop the run automatically after the duration EEEE you have set If necessary press the Run Stop key to stop the run early The fixed duration mode is useful if you need to make a single measurement run where you know the duration but you do not know the exact time when the measurement run must start Timers Mode Mime The timers mode allows you to set the day of the week and the Ti f Any 08 00 17 00 time when a run starts and stops You can set the instrument to m x mon o 00 17 0 start and stop one or more runs on different days and at different 7 75 times T5 X Thu 08 00 17 00 T6 X Fri 08 00 17 00 Repeat x You can set the pattern of runs to occur only once or yu can set BBC the pattern of runs to repeat on the same days and at the same times each week When you use the timers mode you must leave the instrument switched ON from the start of the first run until after the end of the last run You must therefore operate the instrument from a mains DC power supply so that the measurement runs occur without interruption This timer mode is especially
58. e only batteries of the correct type and do not mix battery types in the instrument Refer to Battery supply on page 10 for advice about battery types e Do not try to charge non rechargeable batteries e Do not leave discharged batteries in the CEL 63x instrument e Install new batteries as a complete set Do not fit batteries that have a mixed state of charge Refer to How to fit new batteries on page 10 for instructions to install batteries e Remove all batteries from the CEL 63x instrument if you will not use the instrument for a long time e Always follow local regulations to dispose of used batteries A CAUTION The CEL 63x instrument is not waterproof Do not immerse the instrument in water or use it in the rain 8 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 2 Features Figure 1 shows the main features of the CEL 63x instrument Refer to Figure 1 when you perform the tasks and instructions in this User Manual Figure 1 Main features of the CEL 63x sound level meter 1 Windshield to cover the removable microphone 2 Pre amplifier removable pull the knurled body of the pre amplifier connector away from the instrument body When you attach the pre amplifier to the instrument make certain the red dot faces towards the front of the instrument 3 ON OFF key 4 Display screen 5 Softkeys 6 Navigation keys 7 Run Stop key Refer to section 4 2 User controls o
59. ed for the measurement and whether the measurement is a maximum or a minimum LAlmin LClmi Press PM to Hold Dl LZimin Peaks Layg and other functions Peaks The Peaks functions are Lapx Lcpk and Lzpx 7M LAVGs These functions record the peak levels of noise using A Cand Z Other weighting LAFTm3 LAFTm5 LAE LA vg LAITm3 LAITm5 Press P to D Hol Layg is the time averaged noise level with an applied exchange rate measured during the run The two options are to use exchange rates Q5 5 dB or Q4 4 dB Other functions Lar is the A weighted exposure level previously known as SEL It is the sound pressure level that would contain the same amount of energy in one second that the actual noise has during the whole measurement period Lrm3 and Lrm functions are Taktmaximal A weighted fast or impulse measurements Taktmaximal measurements are specified in German noise standards the DIN standard They integrate noise over a 3 second or a 5 second 53 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL period and produce an average level that assumes the highest level was present for the entire 3 or 5 second period Statistical values The statistical functions Lio Lao Loo and Lo show the sound pressure levels that are exceeded for 10 50 90 and 95 of the measurement period respectively For example the measurement Lipo is the level
60. er the button on the kit is pressed then an external event is started or extended see external event details above The LED will flash to show the event audio is being saved When the maximum event time is reached then the LED is switched off If memory is low then during an event the LED will be continuously lit to show an event is in progress but the event audio is NOT being recorded When the LED is off then an event is NOT in progress At the end of a NRR run the user is prompted to do an after run calibration Note if memory is low or an NRR run is delayed using the start stop timers or the NRR run is not the first run in a sequence of runs then the voice notes option is skipped Voice notes can however always be added after the run is completed 58 Casella CEL CEL 63x Environmental amp Occupational Noise Meter 6 Specifications 6 1 General CASELLA CEL The CEL 63x family is a range of instruments that support different firmware functionality Figure 14 below shows the functionality of the models in the range Figure 14 6 2 Standards CEL 63x instrument functionality o alna 5 So o c cciltec 2 9 9o 2d Te E Soa Eoa Application S c So ct o o 3 22 ee IKE e o wu OZ y O Npa e e Q Q Model number A E ul m Oo O Cumulative Results v v Period Results Profile Results Statistical Parameters Ln Audio Notes NES Marker Events Level Events
61. exceeded for 10 of the measurement time and Lop is the level exceeded for 90 of the measurement time The CEL 63x instrument also provides a user defined variable statistical measurement 54 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 4 5 Connections All connections to the CEL 63x instrument are made through three ports behind a hinged panel at the bottom of the instrument Figure 13 Connection ports 1 1 Power input port 2 Mini B USB port 3 ACand DC output port Power input port The power input port allows you to connect a DC power supply to operate the instrument You must use a 2 1 mm DC plug that has the positive supply connected to the centre receptacle A CAUTION You must make certain the DC power input ground is kept isolated from any signal ground Refer to Mains DC supply on page 11 for information about the requirements of a suitable mains DC power supply for use with the CEL 63x instrument Mini B USB port The mini B USB port allows you to connect the CEL 63x instrument to PC When you connect the instrument to a PC the instrument appears as a removable disk drive in Windows Explorer The Casella insight data management software is available from Casella CEL You must use this program to download measurements directly from the instrument without using Windows Explorer The insight software includes 55 Casella CEL CASELLA CEL 63x
62. indo 25 Run Stop Bi ESPERE REF RA FUREUAS TRUE EE EYE EAEAN E QURE EAE PREX FERE RA Ee ROT HM S E 2 010824 1 7 01 BARN RR RN IRR RR oan oRA ARADO 25 SWItCH ON cccccccececcccecccecccccsccccccsecsceeccesceeseceesescecsesesescecesessceseccescssscsssssssssssssssssssssssssees 2O SINE ehcp cence cana ge ca I IIT 2 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 4 4 4 5 5 1 5 2 5 3 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9 6 10 6 11 6 12 6 13 6 14 6 15 6 16 Measurement StOD SCIGen osse ooo o enin nonae ooa ue nn annuae se oae ua en an eaa se ye qo seen danses se seas sees sus 277 Calibration MOdC ccsscesssccsssscesssccesssecssscccsssecesseecesseeessnecessuecesseecsseeeesssecesseecesseeessees 29 Measurement run SCIEENS 00ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssseees QL WIGTIUES CHE CIS ERREICHTE S USB coninect thiode ue etit tao eie cascades ccdesdeeccdedvesdacsdiesdsedaueacdesstencdessueccdescanetese f Measurement VIEWS cccssscccessssscccessnscecesssscccesssesecessseseesesseseecessusecsssssseesessssesesstsesees BO User SOttingS ccscccsssseccssssscceessseccsssnsecesssnsecesssesseseesensecesssusecssssessesssstsecsssseseessssetees GO Measurement FUNCTIONS cssscccesssscccessseccssssescecessssseceessssecsessessecessesecsesssseesesssssessssses DO GONMECCIONS ssucsceseicescsvesscedesesswecssesenaccsovesuessores
63. ine Mode can optionally output just Period results just Profile Results or both Period and Profile results allowing output from once a second to once a day The run will also store the period profile and marker files to memory as normal so even if some results may be lost from the real time output then there is always a backup of all the results from the real time output which can be accessed using the Casella insight data management software The CEL 63x can store up to 400 days worth of runs providing power is maintained then the system can run without intervention for over a year and all the time be outputting results over the RS232 NOTE When Online mode is enabled then External Events are automatically disabled as the bottom socket is not available as its used for RS232 output Also Event Audio and Event Profiles are automatically disabled Level and Marker events can still be enabled to give event records without event audio or event profiles and voice notes can still be created NOTE Do not select Environmental 2 setup unless using with the MAM Multi Agent Monitor A To set Periods Only 1 Enable Output Periods in the Online Menu above 2 If Octave or third octave Legs are required then Select 1 1 1 3 Octave Leq in the Online Menu above 3 In Measurement Control Date Sets menu then Select Set the required Periodic Interval Set Profile Interval OFF 4 Inthe Setup Measurement view select the setup
64. instrument can start and stop T4 X Wed 08 00 17 00 measurements automatically on preset days and times n 820 Nuccind T6 X Fri 08 00 17 00 Repeat x You can set different start and end times for each day of m ota the week and you can set the instrument to capture measurements during more than one period on each day You can also set the instrument to capture measurements for the same time period on every day Press the Run Stop key to set the standby mode until the start of the run Timers When the Run Stop key is pressed to start a timed sequence of runs the CEL 63x instrument finds the first enabled timer starting from T1 and waits until the start day and time defined by that timer The instrument then performs the run On completion of the run the instrument then finds the next enabled timer T2 to T6 and waits for the indicated start day and time 36 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL When the instrument has cycled through all six timers it either stops the run sequence or if the Repeat option is enabled it repeats the sequence continuously from the beginning The timers can be set to run on a specific day of the week at a specific time 7 day timer or to start on any day of the week at a specific time 24 hour timer The start time for a timer can be the same as the end time for the previous timer so that unlike some meters the CEL 63x does NOT require a numbe
65. ker key is pressed Refer to Audio Recording on page 40 for details on this feature 32 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Menu screens The CEL 63x instrument s Menu mode has three options Zn O e The Settings option allows you to change the instrument s setup e The Memory results option allows you to view information stored in the instrument s internal memory e The Instrument status option displays the instrument s current operating status Settings There are seven main options in the Settings screen e Setup allows you to set the measurement view or to create user defined measurement views e Set Clock allows you to set the date and time or to change the date and time settings e Language allows you to set the language used for the instrument s screens e Backlight allows you to set the duration and level of backlight illumination e Measurement Control allows you to set the method used to start and stop measurements and allows you to set whether you are measuring Cumulative or Periodic data sets e Calibration reference level allows you to set the instrument to use the correct sound pressure level for the calibrator e Audio Recording allows the audio to be recorded for audio notes all models for markers and events CEL 632 amp CEL 633 as well as the pre trigger and quality of audio recording e Meter Mode allows you to select either octave or s
66. llow annotation of measurements On CEL 632 and CEL 633 models audio can be stored with data markers or for events triggered by a specific parameter e g Leq 11 Structure of this User Manual The structure of this User Manual is designed to help you find the information and instructions you need to complete a task easily Refer to section 3 Quick reference on page 10 for instructions to use the CEL 63x instrument If you need more information about any of the CEL 63x instrument s controls screens and features then you should read the section 244 called Detailed description which begins on page 24 To help you find the information you need quickly in the electronic version of this User Manual it includes clickable links The links appear as blue underlined text You can also click the names of chapters and sections in the bookmark panel and in the table of contents to jump to that part of the manual 5 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Colour coding The CEL 63x instrument s screens use a colour code to help you identify their purpose quickly This manual uses the same colour codes Refer to section 4 3 Screen groups beginning on page 25 for more information This colour indicates Cyan Memory results screens Green Measurement run screens Red Measurement stop screens Yellow Calibration mode Blue Menu screens Grey USB connection mode 6 Casella CEL CASELLA
67. ly the term Layg is used when the exchange rate Q is some value other than 3 for example when making measurements for the OSHA Hearing Conservation Amendment with Q 5 The threshold value is used during calculation of Layg where any levels below the threshold are not included Example Assume the threshold level is set to 80 dB and the exchange rate is 5 dB Q 5 In this case if you made a one hour measurement in an environment where the noise levels varied between 50 dB and 70 dB the sound level would never exceed the threshold so the instrument would record no value for the Layg However if the sound level exceeds the 80 dB threshold for only a few seconds only these seconds contribute to the L4 producing a result of approximately 40 dB This result is much lower than the actual ambient sound levels in the measured environment Octave weighting The setting options are for A C or Z weighting This is the octave weighting used to display octave or 4 octave band results e Aweighting is the usual method of adjusting the measured sound pressure level so that the measurements represent the frequency response of the human ear e Cweighting applies only a relatively small correction to very high and low frequencies C weighting represents how the human ear responds at very high noise levels e Z weighting does not include any frequency correction to the sound pressure levels so that the response is effectively flat NOT
68. manently charged material in its construction The instrument is supplied with a windshield The windshield provides protection from wind and from minor mechanical damage The windshield should always be fitted to the microphone There are two classes of microphone available which have different sensitivities e TheClass 1 microphone CEL 251 has 50 mV Pa sensitivity e TheClass 2 microphone CEL 252 has 30 mV Pa sensitivity NOTE For High range measurements above 140dB a special microphone MIC1 and adaptor MPA1 can be used See page 56 4 2 User controls Soft keys The Soft keys select between the two options showing at the bottom of the screen These two options change depending on which screen is showing on the instrument s display Therefore the Soft keys can have different functions depending on which screen the instrument is showing Usually you must press the Soft key on the right to select a function and you must press the Soft key on the left to exit a screen or cancel a function Press the Soft key for the option that you need to select that option 24 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Navigation keys The four Navigation keys allow you to select items on the main part of the screen Press the gt 4 or v Navigation key to change to the next selection in the direction of the cursor arrow Run Stop key The Run Stop key m allows you to start and to s
69. ment s display Navigation keys The four Navigation keys allow you to select items on the main part of the screen Press the gt 4 or v Navigation key to change to the next selection in the direction of the arrow Run Stop key The Run Stop key gt m allows you to start and to stop a Run Press the gt m key when the instrument is in the Stop mode to start the Run Refer to Measurement stop on page 27 for information about the Stop mode Press the gt m key during a Run to stop the Run 12 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 3 3 Set the time and date Follow the steps below to set the clock 1 Press and release the ON OFF key to switch the instrument ON 2 Wait approximately 10 seconds until the instrument s initialization screen changes to the Status screen 3 Press the Menu Soft key to see the instrument s Settings menu 4 Follow the instruction steps shown in Figure 2 to set the time and the date NOTE You can set the instrument s clock to the exact time by setting the hour and the minute and then pressing the Save Soft key when the second hand of a reference clock reaches the start of the minute Figure 2 Setting the time and date a 5 g is 23 Sep M us 23 Sep t 4 it 2 4 5 7 s See lt Se iik eee 1 4 W gt 34 M8 gt gt a 6 4 WE gt EJ w fi secu EENECCIONENNM Date d 1 a NN END aE 8 10 gt lt gt lt gt a 9 4
70. ment view Figure 6 Set a user defined measurement view 4 9 1 150 EU Active 1 150 EU n Cu pm esta clio un Q B Ncc eed rOn wen 1 1 Oct 8 User 2 9 User 2 4 aL 2 4 6 7 d lt di lt re to lt 1 4 gt 3 4 gt 5 a a v v duon ae T E creo tzrmex Response Freefield ns woo dence eris LAVGs ta ta un ax ax l7imax LAvg O4 LAvg 05 Octave weighting gt LtOs in ZF min gt omer Octave time const F C ices 0 c LZSmin LAFTm3 LAFTm5 LAE aoa x m LZimin LAITm3 LAIT 10 ra 8 lt NT gt gt Press the Run Stop control key m gt at step 12 to select or deselect the chosen function Press and hold the m gt key to set the main SPL value that is displayed in the stop mode Refer to Section 4 4 Measurement views on page 48 for a description of the User 1 and User 2 settings that you can use Measurement controls These settings control how the instrument starts and stops each measurement run You can choose among three options Figure 7 explains how to select each of the timed operation modes NOTE For measurement runs that have a long duration you should use a mains DC power supply to operate the instrument 18 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Key press The key press mode allows you to start and stop each measurement run by pressing the Run Stop key This manual control of th
71. n page 24 for a description of the Soft keys of the Navigation keys and of the Run Stop key 9 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 3 Quick reference 3 1 Powering the instrument The options for powering the instrument are as follows e Batteries e 12 V DC adaptor part number PC18 e USBconnection part number CMC51 Battery supply You can use alkaline or rechargeable AA batteries to operate the instrument Do not use a mixture of alkaline and rechargeable batteries at the same time The operating time that you can expect from a fully charged or new set of batteries depends on the battery capacity and whether you use the instrument s backlight Environmental conditions such as the ambient temperature also affect battery life See section 6 Specifications beginning on page 59 for some typical battery life examples You should also carry a spare set of batteries IMPORTANT To save power when operating on batteries the CEL 63x instrument switches OFF automatically if no measurement run is in progress and there is no key press activity for five minutes You should operate the instrument on a mains DC power supply if you must leave it unattended while making an extended measurement run The instrument does NOT switch off automatically when it operates from a mains DC supply How to fit new batteries Before you begin Read the caution notice about Batteries on page 8
72. non condensing relative to the value under reference conditions 6 17 Storage environmental conditions Humidity o 96 to 90 RH non condensing Temperature 20 C to 60 C Pressure 65 kPa to 108 kPa 61 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 6 18 Microphones CEL 251 l inch Class 1 50 mV Pa pre polarised back electret CEL 252 Yo inch Class 2 30 mV Pa pre polarised back electret Microphones use a separate pre amplifier CEL 495 MIC1 High range 14 inch microphone 2 8 mV Pa pre polarised back electret MPA1 1 2 inch to 14 inch adaptor 6 19 Calibration Auto calibration by application of a 1 kHz calibrator tone nominal level 114 dB or 94 dB 1 dB Auto calibrated to a user specified reference level with recording of date time and offset 6 20 Power supply External DC Optional PC18 12 V DC universal power supply adaptor available from Casella CEL e Supply voltage 12 V DC e Supply current 170 mA continuous rating e 2 1mm power connector Batteries Three AA alkaline or rechargeable cells Battery life Typically better than 8 hours in broadband mode with backlight continuously on at low intensity High levels of backlight intensity reduce the battery life Typically 12 hours measurement time with backlight OFF 6 21 Internal clock Date and time accuracy better than 2 seconds per day 6 22 Languages English default English US date time format Spanish French Ge
73. nt A C or Z weighted from 65 0 dB to 143 3 dB RMS detector Digitally derived true root mean square RMS detection 0 1 dB display resolution Noise floor Total inherent noise including microphone thermal noise at 20 C e lt 20 dB A Class 1 e 24 dB A Class 2 Electrical noise floor 17 5 dB A Frequency response 6 Hz to 20 kHz lower and upper 3 dB frequencies Digital sampling rate 67 2 kHz Overall Class 1 and Class 2 frequency response compliant with IEC 61672 1 2002 60 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 6 10 Time weightings Fast F Slow S and Impulse I according to IEC 61672 1 2002 6 11 Correction filters Built in correction filter for random incidence sound pressure fields 6 12 Reference direction For free field measurements the reference direction is perpendicular to the microphone diaphragm 6 13 Reference conditions e 23 C air temperature e 50 26 relative humidity RH e 101 325 kPa atmospheric pressure e Nominal reference level 114 0 dB at 1 kHz 6 14 Operating environmental conditions Humidity 5 to 90 RH non condensing Temperature 10 C to 50 C Class 1 o C to 40 C Class 2 Pressure 65 kPa to 108 kPa 6 15 Effects of temperature Electrical stability of the instrument lt 0 2 dB over the range 10 C to 50 C 6 16 Effects of humidity Less than 0 5 dB over the range 25 to 90 RH
74. nt view The following settings CANNOT be changed after the run has completed Therefore it is important to set them correctly BEFORE you start the measurement run 1 Microphone response random or free field 2 Lavg threshold 3 Ln variable percentile Measurement run duration In manual Cumulative mode a run will end automatically after 24 hours In manual Periodic mode a run will end at midnight and a new run will start again automatically immediately to produce a set of results for each day This sequence can continue for up to 400 days if the instrument is left running indefinitely When using the Delay or Timer measurement controls the cumulative or periodic run will continue for up to 24 hours under control of the delay or timers 6 30 Physical Dimensions 71 5 mm wide 230 0 mm high 31 0 mm deep Dimensions include microphone and removable pre amplifier CEL 495 Weight 0 332 kg with batteries 0 254 kg without batteries 67 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 7 Care and maintenance e Usea clean slightly damp cloth to wipe the outside of the CEL 63x instrument Do not use abrasive caustic or solvent materials to clean the instrument e Check the condition of the battery compartment when you fit batteries to the instrument Check for signs of corrosion and arrange any repairs necessary e Remove the batteries from the instrument if it will not be used for a long
75. of the product Products covered by the Casella CEL Lifetime Warranty are CEL 24X Series Sound Level Meters CEL 35X Series dBadge Noise Dosimeters CEL 6XX Series Sound Level Meters TUFF Personal Air Sampling Pumps Note X denotes the product variant Includes Intrinsically Safe models where available The warranty applies to free of charge repair of the product by Casella CEL Casella CEL at its discretion may elect to agree with the owner a value for part exchange of the product in case the parts and labour cost of the repair exceeds the economic value of the product The Lifetime Warranty is valid for the following components of the product Printed circuit boards e Cases e Displays e Interfaces keypads e Pump assemblies Internal sensors 69 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL The warranty excludes the following components of the product or aspects of damage e Batteries except back up batteries e Microphones e Cables and accessories of the product e Damage caused by battery acid leakage e Severe pump contamination e Damage caused either accidentally or maliciously The warranty starts with the date of invoice by Casella CEL Regular calibration in order to continue the warranty past the original 2 years the product must be returned to Casella CEL or an authorised service centre on a yearly basis for calibration Failure to do this will invalidate the lifetim
76. olution or low quality 8 000 samples per second at 8bit resolution For applications where audio is being stored for noise source identification and voice note storage low quality is more than adequate Low quality is suitable for signals up to 4kHz for signals where audio likely to be above 4kHz use high quality High quality will store all audio up to 12 kHz Audio files are stored up to 110dB Above this level sound may be distorted NOTE High quality requires 3 times the amount of memory so if audio is likely to be stored for a long duration use low quality where possible Pre trigger This applies to markers level events and externally triggered events Therefore the instrument is continuously storing the audio to a temporary memory but discarding it unless needed for an event or marker NOTE Multiple audio files cannot be recorded simultaneously so the audio recorded for pre trigger may be shorter than the set time if for example a marker has been stored just prior to the start of an event 41 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Meter Mode The Meter Mode option allows you to set whether the CEL 63x 1 ga Ur instrument displays measurements octave or octave frequency bands Table 2 below lists the octave and octave centre frequencies and the upper and lower frequencies of each band CREME RE Table 2 Octave band frequencies Octave 1 3 Octave Upper cutoff
77. over time 0 48 36 24 12 Secs Overload An arrow pointing upwards ff near the top right hand corner of the screen shows that an overload noise level that exceeds the instrument s measurement range has occurred If this occurs the measurement values shown will be incorrect and you may need to consider the validity of any measurements made 28 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Calibration mode The CEL 63x instrument changes automatically from Stop mode to Calibration mode when it detects a stable 1 kHz calibration tone The Calibrate mode has two separate screens e The Start calibration screen e The Calibration progress screen Start calibration The Start calibration screen shows the setting for calibration Carrot 1140 reference level and the level of calibration tone that the be Ties do instrument is measuring g x s IMPORTANT You must make sure the instrument is set to use the same calibration reference level as the calibrator Refer to the calibrator s manual for this information and refer to Calibration reference level on page 39 for instructions to change the instrument s setup The Start calibration screen has two options Y The green tick symbol allows you to start the calibration process The red cross symbol allows you to exit the Calibration mode Calibration progress After you start the calibration process the Calibration progres
78. plied to measurements When using this setting the instrument applies a 1 second time constant when calculating sound pressure levels Slow measurements are identified by using the subscript S The sound pressure level This is the basic physical measure of noise and is normally expressed in dB The sound pressure level below which sound measurements are excluded from the calculation 74 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 10 Additional information Frequency The following additional information relates to testing under IEC 61672 1 2002 section 9 3 of the standard 1 Reference sound pressure level The reference sound pressure level can be selected to 94 dB or 114 dB 2 Reference level range The CEL 63x instrument has a single measurement range of 0 dB to 140 dB 3 Microphone reference point The microphone reference point is the centre of the microphone s diaphragm The o reference direction is perpendicular to the microphone s diaphragm 4 Acoustical frequency response testing Table 3 shows the pressure to free field correction data for the CEL 251 microphone used for periodic testing Table 3 Pressure to 0 free field corrections Expanded Without wind With wind Without wind With wind uncertainty of screen screen screen screen corrections at 95 probability k 2 Bruel amp Kjear 4226 Bruel amp Kjear UA0033 calibrator electrostatic actuator 75 Casella CE
79. pt LC Aeq in the range 0 0 dB to 199 9dB and LC Aeq has a range 5 0 to 199 9dB 86 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Octave or 1 3 Octave Period Result line If the 1 1 1 3 Octave Leq is enabled and the meter has octave or third octave filters then an Octave Period result line is output with 11 x Octave band Legs or a third octave Period result line is output with 33 x 1 3 octave Legs These are in format 1 1 OCT LwEQ YYYY MM DD HH MM SS freqi value1 freq2 value2 freqi1 value11 1 3 OCT LWEQ gt YYYY MM DD HH MM SS freqi valuei freq2 value2 freq33 value33 Where LwEQ Lzzo Lcro or Lago depending on the setup octave weighting e g 1 1 OCT Leeq gt 2010 05 07 15 23 45 16Hz 32 4 32 Hz 67 2 16 KHz 54 2 1 3 OCT Leeq gt 2010 05 07 15 23 45 12 5Hz 32 3 16Hz 43 2 20 KHz 32 7 NOTE Environmental 2 setup should be selected when used with the Multi Agent Monitor MAM see MAM operator instructions for further details RS232 Data Format The online mode uses 1 start bit 8 data and 2 Stop bits with NO parity with a baud rate between 1200 and 115 200 Ensure that the receiver is set to the same baud rate and data format The Comma Delimited ASCII data format can be directly input into a standard terminal emulation program e g Microsoft HyperTerminal and can be saved as a standard text file which can be exported to most
80. r of seconds when noise is not measured between runs to perform housekeeping operations Data sets A The measurement data sets option sets how the CEL 63x Mennene instrument captures measurements over a period of time _ You can set the instrument to capture measurements during a EA Syrie m single run These are called cumulative measurements You can set the instrument to capture repeated measurements to MENNIZEZ create a periodic time history The storage interval that LAeq is stored for events is also selected on this screen either 10ms 100ms or 1 second Exit l Edit Figure 11 Cumulative measurements and Periodic Time History sa ia start l Cumulative Stop j 12 3 Profile n Start Stop Period 1 Period 2 Period 3 a oe SV Profile NOTE Event measurements are taken as well as the measurements above and are set up independently Please see Event setup on page 38 for a detailed description Figure 11 shows three examples of cumulative measurement runs and periodic time histories 37 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 1 This example is a single cumulative measurement run as a dark blue line The duration of the run is set by the Measurement start and stop modes You can use the screens in the Memory results to see the captured measurements as a graph or as values The measurements are stored in memory and can
81. re Levels Legs 2 The second screen shows Maximum and Minimum SPLs s The third screen shows Peaks averages Lavgs and other functions 4 The fourth screen shows Statistical Values Ln 51 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL SPL and Leq SPL The function highlighted in red is the main SPL instantaneous sound pressure level that is currently selected This is the SPL value shown on the screens when the instrument is in Measurement stop or in Measurement run mode The functions highlighted in green are the other functions that are selected for display during a measurement run You can select other SPL functions by using the Navigation keys and then press the Run Stop key to add the selected function to the user defined measurement view You can select an SPL function and hold the Run Stop key pressed for one second to set the selected function as the main SPL You can also select any non SPL function Keep the Run Stop key pressed for one second to set the selected function as the main run function This will then be displayed using a larger font during a run The CEL 63x instrument allows you to store statistical information Ln about the instrument s measurements The recorded Ly values include A C and Z weightings Refer to Statistical values on page 54 for an explanation of the statistical functions The Ln values are ALWAYS calculated using the Fast octave
82. rements and is equivalent to La Normally this term is used when the exchange rate Q is some value other than 3 such as for measurements used for the OSHA Hearing Conservation Amendment with Q 5 73 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Lepk also Lepr Lzpk Peak Slow time weighting SPL Threshold Example A Threshold value is used during the calculation of Lay where any levels below the threshold are not included For example assume the threshold level is set to 80 dB and the exchange rate is 5 dB Q 5 If a one hour measurement were taken in an environment where the noise levels vary between 50 dB and 70 dB the sound level would never exceed the Threshold and the instrument would record no value for the La However if the sound level exceeds the 80 dB Threshold for only a few seconds only these seconds contribute to the Layg giving a level of approximately 40 dB which is much lower than the actual ambient sound levels in the measured environment The peak C weighted also A weighted or Z weighted sound level The maximum level in dB reached by the sound pressure at any instant during a measurement period The CEL 63x instrument can measure the peak sound pressure using A C or Z weighting Peak is the true peak of the pressure wave which you should not confuse with the highest sound pressure level which is called Lmax A standard time weighting ap
83. rman Italian Portuguese Chinese Brazilian Portuguese 62 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 6 23 Electromagnetic compatibility The instrument is designed and tested to comply with the following EMC and ESD standards e IEC 61000 4 2 Testing and Measuring Techniques Electrostatic discharge immunity tests e IEC 61000 6 2 Generic standards Immunity for industrial environments 6 24 Effects of AC power frequency fields Less than 0 5 dB change from 74 dBA 925 Hz reference level when subjected to 160 A m AC magnetic field at 50 Hz and 60 Hz 6 25 Tripod mounting Socket to mount on standard inch Whitworth camera tripod thread 6 26 Display 320 x 240 pixels transmissive colour TFT update period 0 5 seconds 6 27 Memory Micro SD 2 GB non volatile internal memory Maximum capacity Limited to either 1 999 individual runs or 2 400 separate runs of 24 hours duration with 1 minute periods and 1 second profiles Excluding event and audio data 3 999 events per run 4 999 audio files per day 5 20 hours of audio recording in high quality mode 60 hours in low quality mode 6 28 Connectivity Refer to Figure 13 USB Mini B CMC51 to download to Casella insight data management software AC output 2 5 mm stereo jack barrel ground tip AC output provided for remote monitoring or recording PC WAV file recording or headphone applications Approximately 0 4 Vrms
84. s e no parity This printer should be loaded with 78 mm thermal paper and connected to the CEL 63x using Casella CEL cable Casella CEL part number 196137B which connects to the RS232 cable supplied with the printer If the printer does not print anything sensible then perform a test print and ensure the above RS232 protocol is selected see the CMC73 User Manual for details NOTE If it is required to print Chinese reports then the printer must be loaded with the GB2132 Chinese character set Contact the printer supplier or Casella CEL for details Adding your own Logo to print reports It is possible to add your own logo to personalise reports These can be any size up to 127 dots wide x 248 dots high This feature can be used to add a company logo or to have extra fixed text or symbols For example if you wanted to add details of the weather then a box titled Weather could be printed with the report and the user could then write in the weather by hand The logo is downloaded and kept in the printer flash memory using the LOGO MANAGER IBM PC software which is on the CD disc supplied with the printer If the Own Logo option is enabled in the print report options then this logo will be automatically printed at the start of the report 46 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Instrument status o Select the Status option in Menu mode to see information about msn the instrument status
85. s TCPETT screen shows a horizontal progress bar and the level of Le 113 8 dB calibration tone that the instrument is measuring After the calibration process finishes this screen shows whether the calibration has passed or failed 0 CM 0 i L 1140 dB When the calibration passes it is saved automatically LU nud Passed uns Updated 0 0 29 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL If the calibration fails this indicates a technical problem with either the instrument or the calibrator The basic checks to try if the calibration fails are as follows e Check that the microphone and calibrator are fitted correctly e Inspect the microphone and the calibrator s cavity for signs of damage e Check that the calibration level is set correctly If the instrument persists in failing calibration contact Casella CEL for advice Press Exit to exit the Calibration mode without saving the new calibration 30 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Measurement run screens The CEL 63x instrument captures measurements when it operates in the Run mode The functions displayed depend on settings defined by the Measurement View in the instrument s setup Refer to Setup on page 33 for instructions to change the instrument s setup The Run mode has six types of screen e The Main screen e The Ln s screen e The Qctave and 1 3 Octave
86. s that might have been displayed 70 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL NOTE i Any stored data should be downloaded before sending the unit for service because it may be deleted during service Also any customer set up should be noted because these may be changed or reset during service The necessary adjustments or repairs will be performed and the instrument returned to you as soon as possible After the warranty has expired except on approved accounts service work is undertaken against quotations and all packing and transit costs are charged extra 8 4 User servicing There are no user serviceable components inside the CEL 63x instrument DO NOT open the instrument to attempt repairs You will cancel the warranty if you attempt to open the instrument for any reason If you suspect the instrument has developed a fault contact your local Casella CEL agent to arrange for service and repair 71 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 9 Glossary The following list defines some of the acoustic terms that you can find in this User Manual For additional information contact Casella CEL or your local agent Acoustic calibrator decibel dB dB A dB C dB Z Fast time weighting Impulsive time weighting An instrument that provides a reference noise source with a standard level and frequency It is used to calibr
87. spread sheets e g excel 87 Casella CEL
88. top a run Press the gt m key when the instrument is in the Stop mode to start the run Refer to Measurement stop on page 27 for information about the Stop mode Press the gt m key during a run to stop the run 4 3 Screen groups The CEL 63x instrument has groups of screens that allow you to set up and operate the instrument and to see the results of the instrument s measurements The screens have colour coded bars at their top and bottom edges to help you identify which screen group they belong to Refer to Colour coding on page 6 and Figure 10 below for the colour codes Note that the contents of some screens may vary depending on the model of instrument you are using Figure 10 Screen groups Status Measurement Measurement stop screens run screens USB connection mode Menu Memory screens results screens Each screen group includes one or more separate screens Figure 10 shows how the screen groups relate to each other Click any of the groups shown in Figure 10 to read a description of that group 25 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Switch on The CEL 63x instrument shows an introduction screen after you switch the instrument ON The introduction screen shows the following information about the instrument e The model number of the instrument for example CEL 63x e The instrument s serial number e The firmware version that is operating inside th
89. tput and for the DC output is on the barrel connection 3 The signal ground must be isolated from the ground connection of the DC power input when you use a mains DC supply High level noise measurements The CEL 63x instrument may be used to measure sound pressure levels up to 165 dB when used in conjunction with microphone MIC1 To set the instrument to the 140 dB or the 165 dB full scale measurement mode refer to the System Tools menu see the note on page 26 56 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 5 Mode Selection SLM Online NNR 5 1 General Changes to the mode of operation for the CEL 63X instruments are made within the system tools menu upon instrument start up See page 26 5 2 SLM Mode This is the default mode of operation In the system tools menu a user can select either SLM Online or NRR mode In SLM mode a user has manual or timed control over when runs start using the keys and timer menus 5 3 Online Mode In online mode the meter will output period and profile records during a run to the RS232 port a socket shared with the USB Two cables are required either 196137B Printer Cable or 196138B PC Cable In online mode runs will automatically start when the meter is powered up Period and profile data is automatically outputted in ASCII format that can be captured with PC applications such as Hyperterminal The following parameters are fixed in Online mode an
90. urement setup will require two sets of frequency bands to be printed using more paper Disabling both Octave options above just prints a broadband set of results Print Screens This mode captures the current result screen and prints a graphical copy of this screen to the printer While displaying the Memory results screen select the View icon instead of the Printer icon and use the keys to select each screen of the current runs results Press the Run Stop key when you want to print the current screen This printing format is particularly useful when displaying octave or 1 3 octave results when the graphical bar graph of the spectrum can be printed for any of the selected narrow band functions 45 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL Any mix of print reports and result screens can be printed Printer set up It is necessary to set up the printer CMC73 before using it for the first time NOTE Refer to the User and Programming manuals for the CMC73 on the CD which is supplied with the printer for details on setting the dip switches and the RS232 protocol The CMC73 printer dip switches SW1 SW2 SW3 and SW4 should ALL be in the OFF position which selects the following options e Wide paper roll 78 mm e ESC POS mode e Hardware handshaking e Normal operation The CMC73 uses the following RS232 settings when used with a CEL 63x e 115200 baud e S8data e 2 stop bit
91. urement views are called User 1 and User 2 Refer to User defined measurement view on page 18 for instructions to use these settings When you select one of the user defined views you can change the following settings e Microphone response e L avg threshold e Octave weighting e Octave time constant e Measurement functions Microphone response The setting options are for a Random or for a Free field microphone response True random field and free field conditions do not exist in normal environments The response patterns measured are close approximations to the theoretical measurements under the defined conditions Random field A random field microphone response is often necessary to conform to US regulations A random field response is where sound energy is distributed uniformly throughout the space being measured Free field A free field microphone response is generally necessary to conform to regulations throughout the European Union A free field response is where sound propagates directly from a source to a microphone without any form of obstruction 48 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL L avg threshold The Lavg threshold can be set in the range o dB or 70 dB to 90 dB This threshold is used in the calculation of the average sound level Lavg over the measurement period equivalent to Leq Lavg is a function used in OSHA measurements Normal
92. wer e The instrument stops the current run and turns OFF when the batteries have discharged to 3 0 V This is to make certain the instrument does not make data measurements that will not meet the requirements of IEC 61672 11 Display device The display device displays the complete linear operating range 12 Environmental stabilisation time The typical time taken for the CEL 63x instrument to stabilise after sudden changes in the environmental conditions is as follows e 5 minutes after a 10 C change in temperature e 5 minutes after a 30 change in humidity non condensing e 15 seconds after a 5 kPa change in ambient pressure 77 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL 13 Electric field strength greater than 10 V m The CEL 63x instrument has not been tested for field strengths greater than 10 V m 14 EMC emissions When tested emissions from the CEL 63x instrument were no greater in one plane or in any mode of operation than another 15 EMC susceptibility The CEL 63x instrument has a slightly higher susceptibility with the Y direction facing the radiating antenna e Xis the direction of the microphone e Yis the direction to either side of the case e Zis the direction perpendicular to the surface of the display 10 1 Sound calibrators Level corrections Sound level calibrators apply sound pressure to a microphone in a closed cavity The microphone s response in
93. ws but you cannot change them e There are two fixed views for environmental noise measurements These views display the functions that are commonly reported for environmental measurements You can review the functions for each of these fixed views but you cannot change them e There are two user defined views that allow you to review and change the measurement functions Use the Navigation keys to select one of the measurement view options and press the right hand Soft key to set the measurement view The screen shows the word Active next to the measurement view you have set Figure 5 on page 17 explains how to select a fixed measurement view and how to review the functions for the selected measurement view Figure 6 on page 18 explains how to select a user defined measurement view and how to review and change the functions that it uses 16 Casella CEL CEL 63x Environmental amp Occupational Noise Meter Fixed measurement view Set a fixed measurement view NEIIIZLIEN nison Figure 5 ABO lt 3 ACGIH USA 4 DOD USA 2 4 6 gt gt lt gt lt n 1 lt gt OR 5 tar laeg Leeq Lafmax LCpk LCAeq Response Fieetiold 17 CASELLA CEL View 7 OSHA USA 3 ACGIH USA 4 DOD USA 5 Environmental 1 6 Environmental 2 7 User t 8 User 2 Casella CEL CASELLA CEL 63x Environmental amp Occupational Noise Meter CEL User defined measure

Download Pdf Manuals

Related Search

Related Contents

Alcatel OneTouch 888/888D Owner's Manual  Philips GoGear MP3 player SA018102V  Guida rapida di..  Lave Glace été  User Manual V1.0  Bedienungsanleitung  Modèle 28127 Système Téléphonique sans fil de Couleur, DECT  AMERICAN NATIONAL CAN COMPANY  FilePoint Quick Start Guide. - Bachmann Software and Services  i はじめに - メガソフト  

Copyright © All rights reserved. Failed to retrieve file