Manual - TRS-Environmental
Contents
1. CEL 63x Environmental Noise Meter CEL 5 15 Effects Of temperature ccccccssssssssseeeccccceceessseeecccseeceessseeeccecseeeceseeeecccsseeaseeeeecceeees 52 Pa ENCIS ONU I ae O 52 BAZ Storage SUV Oa CO CI IG INS sorsra E O 52 BAO R eoa OME sncenncosncesassecsnenccsncesseveasnenssoncasnareesnenssoncciencesasnesstioncdsacesasnesastupneasnncsesususapncessueess 52 BAO Gall AUlON sspsescopeceedssnssassacseaacsenstseanaesaaacbenntsasheecsacbanstsasnsessancbantssasneechaceesnntacttuseleseiventwiede 53 Po PONET UDE Ae ee a ee ee 53 Bet MITCH ClO GK sccsirenesrasnnndnonsnnnseausanadoassinensenssnansenasnasssinationeaunacneosuanmanesvanssoudsacgaecioosssweeasaennsees 53 Bi A CS E A 53 5 23 Electromagnetic compatibility cccccccsssssssseeeeccccceeeessseeeeccccseeeessseeeccccseseeeassesceesees 53 5 24 Effects of AC power frequency fields Pae Td 1a 0 0 1a 0 19 oe ee eee eee ee 5 26 Display ccsccocsscosssecerscccsecssseccssecccsecessstcssseceseed 5 27 Memory eesseessssssesseecsecosecosecosecseecseeoseeosecseecseee 5 28 Connectivity sseesssessesseesssesscosseeseeesseeseen S 5 29 Available data sets 5 30 Physical eeeeesseessseeeeesssssssecceersssssses 6 Care and maintenance 7 Servicing and Warranty 7 1 Inspection and test 7 2 Warranty period 7 3 Repairs 7 4 User servicing 8 Glossary ccceees 9 Additional information sseeseeeesssssseseeccsessseeececcessseeseccccesee2. A weighted equivalent level also Leeq Lzeq Lar also Las Licmax A standard time weighting applied to measurements Most measurements are made using the Fast time weighting When using this setting the instrument samples the sound pressure level over a number of discrete s second 125 ms periods Fast measurements are identified by using the subscript F A standard time weighting applied to measurements When using this setting the instrument samples the sound pressure level over a number of discrete 35 ms periods Impulsive measurem subscript T identified by using the The level that would in one second a ain the same amount of energy tual noise has during the whole weighted Z weighted level that 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 Laeg would be 85 dB A The calculation of Laeq does not use a threshold as in the calculation of Lave except for the Lazo T80 function defined for the ACGIH standard The A weighted sound level measured using fast time weighting also with slow time weighting The maximum A weighted sound level measured using slow time weighting 61 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Lave The average sound level over the measurement period is a Average sound function used in OSHA measurements and is equivalent level to Leg N
3. plications AC output corresponds to the Z weighted response of the strument DC output 2 5 mm stereo audio 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 kQ 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 54 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 29 Available data sets A Broadband Cumulative and Periodic Results For each complete measurement run the instrument stores the following e Run start 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 starte e The First calibration after end of ru e The Overload and Battery fail fl e The Environmental indices L In periodic mode the following set of r s is produced for each of the period intervals during a run In cumulative mode the followi le set of results is produced covering the whole run Note that the SPLs are displayed but are NOT stored e Equivalent continuous sound pressure levels LEQ O LAEQ Lexa LZzEQ
4. CASELLA CEL CEL 63x Meter HB3 356 01 draft K User Manual Yer Regent House Wolseley Road Web www casellameasurement com CASELLA CEL 63x Environmental Noise Meter CEL Contents CONTONE E A E A 2 1 IIEFOGUCTIOM a sssesscsassessassenssevsvecasevavocsaesavnccacsssacassavsnscaaussesessenagssaussoucsbesvsegsaensbeesdeavbeseasavbenees 4 1 1 Structure of this User Manual ccccccccssssssseeeecccccccccsseeecccccecceeesseeeccccseeceeasecescesseeeeees 4 1 2 EE E EPEE E E E E A A EA E N TEE E SEE ESEE 6 2 FOOL NCS rc sacccenaaoniactnsauciasesamoniacasapuniecnsacenieasaapeneaanecauaainonan seuss scecsuenasecsusssuesevete eeu sueastensceasuners 8 3 Quick stari UIC sess sucsceccsecucsisscsecscsccsscussdscsdudsdscesudu scatsiedvanesssassaccussesesadeassesanaassesensasacasenes 9 3 1 Powe rng the IMSUFUIMENL cacsacacsazaccensanacvessinacvnsacaacnaaavanausanwansuaaianncesasdendecaecceesestcccesesescosedecs 9 Sa OST E 2 10 6 fc Renn een ee ee eee 3 3 Set the time and date cocassaccewssscccesseacswoassuceosesupersnreccure 3 4 Calibrating the instrumMent eessesesssesesesseeessseeee 3 5 Making a measurement run 4 Detailed CESCrIPtiON scccccccccrcssssseees 4 1 Microphone and pre amplifier 4 2 User controlS esesssessseeeeesssssseeeeee 4 3 Screen ZroUpS eessseeesseeessseeesseeeesse 44 Measurement views gn TA MMM ccccsssccccssssccccesssseccessscccessscecesssseccessscec
5. CEL 63x Environmental Noise Meter CEL Fitting the batteries You do not need any special tools to fit new batteries to the instrument 1 If necessary press and release 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 lo instrument from a mains DC power suppl interrupted by battery failure iod you should operate the This avoids the run being C supply as standard Please pply part number PC18 NOTE The CEL 63x instrument disconne If you use rechargeak i the CEL 63x instrument you must use an he correct type to charge the batteries Follow the by the battery manufacturer to charge the batteries 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
6. LAQ Lc La LAEQT80 O O O O O 55 Casella CEL CEL 63x Environmental Noise Meter CASELLA CEL e Maximum and minimum sound pressure levels O O O O O O O O O LAFMAX LCFMAX LZFMAX Lasmax Losmax Lzsmax Lamax Lommax Lzimax LAFMIN Lcrmin LZFMIN LAsSMIN Lesmin Lzsmin LAMIN Lcrm n LZIFMIN e Maximum and Minimum times The time for each of the 18 maximum and levels is stored to 1 second resolution e Peak sound pressure level O O O Lapk Lepk Lzpk e Peak times The time for each of t resolution e Average sound pressur O inimum sound pressure evels is stored to 1 second three p change rate Q dB or 70 to 90 dB e Statistical parameters L O LaFio Larso Largo LaFos LaFvariable O Lcrio Lcrso Lcroo LcFos LcFvariable O Lizmo Lzrs50 Lzro0 Lzro5 LZF variable e Other Data Start run date and time Run duration Overload time Pause and Back erase time Last calibration before run results First calibration after end of run results Overload and Battery fail flags O O O O O O O 56 Casella CEL CEL 63x Environme 5 30 Physical CASELLA ntal Noise Meter CEL Dimensions 71 5 mm wide Weight 230 0 mm high 31 0 mm deep Dimensions include microphone and removable pre amplifier CEL 495 Less than 0 310 kg including batteries 6 Care and maintenance Use a clean slightly damp cloth to wipe instrument Do no
7. Legos 2 Thesecond screen shows Maximum and Minimum SPLs The third screen shows Peaks averages Laves and other functions 4 The fourth screen shows Statistical Values Ln ca 44 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL SPL and Leg 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 LEQs LAleq LAeqTa0 8 toggle s on The functions highlighted in green are the other functions that are selected for display during a measurement run The SPL subscript identifies the Octave weighting and the Octave time constant to be used for the measurement of sound pressuredevel You can select other SPL functions by usin or control keys and then press the gt m key to add the selected funeti er defined measurement view You can select an SPL function and h gt m key pressed for one second to set the selected function as the The CEL 63x instrument allo j e statistical information Ln about the instrument s mea e statistical information is displayed using the same octave we as it uses for the main SPL value but always based ecorded Ly values include A C and Z weightings Refer to istical functions on page 47 for an explanation of the statisticald ns n values are ALWAYS calculated using the Fast octave
8. not fully charged 10 Casella CEL CASELLA CEL 63x Environmental 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 control keys A and B e Thecursor control keys C bava e The Run Stop control key D gt m C 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 user control keys Refer iption of the user The simple descriptions below show the to Section 4 2 User controls on page controls Soft control keys The soft control keys A and B a lect between the two options The fot ol keys allow you to select items on the main part of the screen selection in ction of the arrow Run Stop control key The Run Stop control 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 26 for information about the Stop mode Press the gt m key during a Run to stop the Run 11 Casella CEL CASELLA CEL 63x Environmental 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
9. LZFmin The L subscript identifies the Octave hting and the Octave LASmin LCSmin LZSmin LAlmin LCimin LZimin time constant to be used for the mea at and whether the tepi somes measurement is a maximum or a mini Peaks Laygs and other functi Peaks Peaks LAVGs LAvg 04 LAvg 05 Other LAFTm3 LAFTm5 LAE LAITm3 LAITm5 Lave 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 e Laris 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 e Lm and Lrms 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 46 Casella CEL CASELLA CEL 63x Environmental 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 functions The statistical functions Lnio Laso Lnoo and Lnos Show the sound pressure levels that are exceeded for 10 50 90 and 95 of the measurement period respectively For example the measurement Lro is the level exceeded for 10 of the ee measurement time and Lpoo is the level exceeded
10. Leo 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 function highlighted in red is the main Leggo that is currently selected The functions highlighted in green are the other functions that are selected for display during a measurement run The Legg subscript identifies the Octave weighting and the Octave time constant to be used for the measurement of sound pressure level 45 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Other functions listed under Leo are as follows e Lareg iS an integrating A weighted measurement of impulse Leo Integrated measurements provide an Leo Measurement that assesses exposure to noise levels and are used in the calculation of the personal noise exposure Lpp as defined by ISO 1999 e Lc Lais a measurement that is used in the HML method where separate values for high medium and low frequencies provide a better estimate e Larorgo is an A weighted measurement of LEQ 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 av e maximum Max Min SPLs 7 3 REET cr max L7Fmax and minimum SPL functions LASmax LCSmax LZSmex LAimax LCimax LZimax LcFmin
11. Noise Meter CEL 9 14 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 Y is the direction to either side of the case e Zis the direction perpendicular to the surface of the display 9 15 Sound calibrators Level corrections icrophone in a closed cavity tone will be slightly alibrators are affected by the Sound level calibrators apply sound pressure to a The microphone s response in a free field to a 1 different from that of a pressure field Also s Table 6 Calibration co 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 v The CEL 63x instrument can be calibrated at a nominal level of 94 dB or 114 dB depending on the type of calibrator used Examples e Ifyou use a CEL 110 or CEL 111 calibrator and the certified output from the calibrator is 113 98 dB and you intend to use the instrument 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 67 Casella CEL CAS
12. complian egrating and Octave band noise owing international standards 50 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 3 5 4 5 5 5 6 5 7 5 8 5 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 RMS frequency weightings A C and Z filter weightings satisfying IEC 61672 1 2002 Class 1 Octave and 4 octave measurement Octave Real time 11 bands with centre frequencies from 16 Hz to 16 kHz 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 wel d in Insight software Peak measurement A C or Z weighted from 65 0 dB to RMS detector Digitally derived true resolution are RMS detection 0 1 dB display Noise floor Total inhere el ing microphone thermal noise at 20 C Electrical noise floor lt 20 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 5 10 Time weightings Fast F Slow S and Impulse I according to IEC 61672 1 2002 51 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 11 Correction filters Built in correction filter for random incidence sound pressure fiel
13. instrument s initialization screen changes to the Status screen 3 Press the Menu soft control 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 control key when the second hand of a reference clock reaches the start of the minute Figure 2 Setting the time and date 13 33 26 13 31 40 Dat ee le gt 4 8 P 29 May 10 1B may 10 gt Ww PE _ J A lt P p d A Re a gt WY vyv 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 12 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Each measurement run stores both the before run and the after run calibration results including any changes in the calibration This confir
14. intensity High levels of e battery life ent time with backlight OFF 5 21 Internal clock Date and time accu temthan 2 seconds per day 5 22 Languages Englis Italian French German ortuguese Chinese Brazilian Portuguese 5 23 Electromagnetic co 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 4 3 Electromagnetic Compatibility EMC Radiated electromagnetic field tests e IEC 61000 4 6 Electromagnetic compatibility EMC Immunity to conducted disturbances induced by radio frequency fields Tested at 10 mV m or greater 5 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 53 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 25 Tripod mounting Socket to mount on standard 14 inch Whitworth camera tripod thread 5 26 Display 320 x 240 pixels transmissive colour TFT update period 0 5 seconds 5 27 Memory Micro SD 1 GB non volatile internal memory Maximum capacity 999 individual runs of 24 hours duration with 1 minute periods and 1 second profiles in 400 separate daily runs 5 28 Connectivity Refer to Figure 13 USB Mini B to downlo t software AC output arrel ground tip AC output ing or recording PC WAV file
15. 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 41 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL L AVG threshold The Lave threshold can be set in the range 70 dB to 90 dB This threshold is used in the calculation of the average sound level Lave over the measurement period equivalent to Leq Lave is a function used in OSHA measurements Normally the term Lave 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 Lave where any levels below the threshold are not included Example Assume the threshold level is set to 80 dB and In this case if you made a one hour measur exchange rate is 5 dB Q 5 in an environment where the threshold for only a few seconds oducing a result of approximately l ambient sound levels in the However if the sound level exceeds t only these seconds contribute 40 dB This result is much lo measured environment Octave weighti g is the usual method of adjusting the measured sound el so that the measurements represent the frequency response of the human ear e C weighting is used in the Control of Noise at Work Regulations and applies only a relatively small correction to very high and low freq
16. the table of contents to jump to that part of the manual 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 24 for more information This colour indicates Memory results screens Green nt run screens Red nt stop screens Yellow Blue screens Grey connection mode 5 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 1 2 Safety AN 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 footw ar suitable for the environment where you are making measurements e Always follow local safety regulationsgand be awafe of risks in the area where you are working CAUTION Use the CEL 63x instrument onl ted in tis User Manual Do not use the instrument for any purposes for wl as nobbeen desig
17. 8 hour Criterion Time and the exchange rate is 3 dB 62 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Peak 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 Slow time A standard time weighting applied to measurements weighting When using this setting the instrument samples the sound pressure level over a number of discrete 1 second periods Slow measurements are identified by using the subscript SPL basic physical ormally expressed in dB Threshold below which sound 63 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 9 Additional information The following additional information relates to testing under IEC 61672 1 2002 section 9 3 9 1 Reference sound pressure level The reference sound pressure level can be selected to 94 dB or 114 dB 9 2 Reference level range The CEL 63x instrument has a single measurement range of o dB to 140 CB 9 3 Microphone reference point The microphone reference point is the centre ofthe microphone s diaphragm The 0 reference direction is perpendicul ophone s diaphragm 9 4 Acoustical frequency response testin Table 3 shows the pressure to free fiel rection data for the CE
18. ELLA CEL CEL 63x Environmental Noise Meter 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 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 12 for instructions to set the calibration level and calibrate the instrument A 68 Casella CEL
19. L 251 microphone used for periodic ng Table 3 Pressure to 0 o Expanded Without wind With wind Without wind With wind uncertainty of screen screen screen screen corrections at 95 Frequency probability k 2 Bruel amp Kjear 4226 Bruel amp Kjear UA0033 calibrator electrostatic actuator Hz B 31 5 0 1 0 1 0 1 0 1 0 2 63 0 2 0 2 0 2 0 2 0 2 64 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 9 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 A 30 to 100 30 to 140 30 to 141 30 to 138 30 to 134 C 32 to 137 32 to 140 32 t0139 32 to 136 32 to 132 Z 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 9 6 Linearity measurements starting point The starting point for measuring line 9 7 Electrical input The input device to apply ele Weighting Electrical Electrical Microphone Combined Combined Typical dB Max dB Thermal dB Typical dB Max dB 18 0 16 0 20 0 21 0 16 8 28 0 16 8 Note that the CEL 251 microphone has a typical thermal noise level of 20 dB A When using the CEL 251 microphone the combined typical and maximum noise levels will be 1 5 dB
20. al control Fixed duration or Timer control for the instrument 20 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL The cumulative data set alone does not provide time history information To include time history information for the measurement you can enable Profile recording Profile recording A profile recording consists of a series oun t Cumulative meg l of fast measurements made at the same time as a cumulative 123 n ile n measurement Profile The profile recording supports a more limited setof functions including Laeg Lateq Lepk Larmax Lasmax Linas and optional When you use profile recording you ca i l of each of the profile measurements to one of the followin e OFF e 1 2 5 10 15 20 30 60 second e 2 5 10 15 20 30 6C J NOTE When used with perioc interval of the cumu profile samples per pe TA profile interval can only be set to a sub f ement duration to produce an exact number of Periodic me dents allow the total measurement duration to lt be divided into separate fixed time intervals In Periodic mode a ra _ full set of results is stored at the end of each time interval _ ss 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 regular repeating intervals Figure 9 Repeating cumulative and pr
21. cccceceeessececccccseeeeesseeeeccceeees 67 1 Introduction The CEL 63x series is a family of noise meters T measurement tools to support a wide range of industrial health and safety and provide a full range of functi and 3 octave band analysis The CEL 63x instr ur TFT screen to show a range of information includ rati nus and messages warnings and the results of measurements een is clear and easy to read under all ambient lighting con ns incl al darkness automatically sh 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 PC application 1 1 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 start guide on page 9 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 chapter called Detailed description which begins on page 23 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 4 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL bookmark panel and in
22. d at T4 X Wed 08 00 17 00 different times ca ae Repeat x You can set the pattern of runs to occur only once or you can set i E the pattern of runs to repeat on the same days and at the same times each week When you use the timer control mode you must leave the instrument switched ON from the start of the first run until after of the last run You must therefore operate the instrument from a mai er supply so that the The timer function is especially usefu with the environmental kit c battery for short to medium the instrument is used together re supports a higher capacity tal measurements 19 Casella CEL CASELLA CEL 63x Environmental 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 rere 9a g 1 3 i Exit il n p ee SZ x lt gt lt A O nN gt 1 lt gt gt 3 lt gt WY Vv LAleq LCpk Cumulative urements A cumulative measurement produces an t ater y 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 Manu
23. ds 5 12 Reference direction For free field measurements the reference direction is perpendicular to the microphone diaphragm 5 13 Reference conditions e 23 C air temperature e 50 relative humidity RH e 101 325 kPa atmospheric pressure e Nominal reference level 114 0 dB at 1 k 5 14 Operating environmental conditions Humidity 5 to 90 RH non condensing Temperature 10 C to 50 C o C to 40 C Class 65 kPa to 10 gi Pressure the value t ence conditions 5 17 Storage environmental conditions Humidity o to 90 RH non condensing Temperature 20 C to 60 C Pressure 65 kPa to 108 kPa 5 18 Microphone Class 1 12 inch Class 1 50 mV Pa pre polarised back electret Class 2 12 inch Class 2 30 mV Pa pre polarised back electret Microphones use a separate pre amplifier CEL 495 52 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 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 5 20 Power supply External DC Optional PC18 12 V DC universal power supply adapter available from Casella e Supply voltage 12 V DC e Supply current 170 mA conti e 2 1mm power connector Batteries Three AA alkaline orr Battery life Typically better t in broadband mode with backlight continuou at low
24. e time constant Maximum and minimum sound pressure level v Peak sound pressure level Average sound pressure level with exchange rate Q LAFMAX LasmMax Lammax LAFMIN LASMIN LAIMIN Lapk Lavea Other measurements refer to Larcrms Measurement views on page 41 Statistical functions Ln Environmental indices Laicrms 32 Lepk Lavc as LarcrMs Larcrns Lns0 La variable LDEN LizrmMax Lzsmax Lzmmax LZFMIN LizsFMIN LZIFMIN Casella CEL CASELLA CEL 63x Environmental 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 The Set Clock screen allows you to set the date and the time and to change the settings when necessary Language 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 The language options are as follows e UK English e US English when using this e Brazilian Portuguese the date for changes e French e German e Italian e Portuguese e Spanish e Chinese The CEL ment has a display backlight The backlight Activation ME allows you nstrument in poor ambient lighting M conditions kness vi The Backlight screen allows you to change the following backlight s se
25. eececcesseeeeeecoessseeeeeeccessseeeeeesees 64 9 1 Reference sound pressure level scsssecesareesavesvevexcanscessecesexccsnuscesvesseveceasecesvestacedaaabouaueronedss 64 Da PETNE EVEL TINO EEEE 64 9 3 Microphone reference point eessssssseeeeessssssecceeesssssseecceesssssseccceesssssececeeessssseecceesssseceeeersss 64 9 4 Acoustical frequency response TESTING cccccccccsssssssceeccccceeeeesssececcccseseeesseeeecceeseeeees 64 9 5 UNCON OMG US TIe O e E 65 9 6 Linearity measurements starting point ssseessssseeeesssseccessseeceessssecesssseecesssseccesssseeeessse 65 O7 Foiea O eers E E 65 9 8 Self generated NOISC ccccccccssssssesseccccccccssscesccccceeceessesescccsseeceasseecccsseeeesssesececcesseesees 65 oo Hene eVel aaa 66 9 10 Power supply voltage range eesseeeeeesssssssccceessssssrccceesssssseccceesssssececeerssssseeeceesssseceeeessss 66 3 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 9 11 Environmental stabilisation time c cc cssssssececcccceceessssceecccccececesseeeeccccseeeeesseeeecceeeees 66 9 12 Electric field strength greater than 10 V M cccccccsscscccccccccececceessssssssccseeeessececceeeseeeees 66 oa EAC CRISS TOR cae sere aoeter cease tan aes aeo oes EEEE E 66 gag EIA SUS COON ocx scieecvencsancxsenaecssinncasacesaneessclencasaczsnseeasoeassenceeneesnsnseautosnecsaseiaupnesssesinecss 67 9 15 Sound calibrators Level COrrectiOnS sssccccccccssssssseceec
26. ently charged material in its construction The microphone 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 The Class 1 microphone CEL 251 e The Class 2 microphone CEL 25 V Pa sensitivity as 30 Pa sensitivity 4 2 User controls The soft control keys select be O options showing at the bottom of the screen These t s change depending on which screen is showing on the instrument s the soft control keys can have different functions depenc een the instrument is showing Usually ae soft control key on the right to select a function and yo ae soft control key on the left to exit a screen or cancel a Press the soft control key for the option that you need to select that option 23 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Cursor control keys The four cursor control keys allow you to select items on the main part of the screen Press the gt 4 or v cursor control key to change to the next selection in the direction of the cursor arrow Run Stop control key The Run Stop control 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 26 for information about the Stop mode Pr
27. ents automatically on preset days and times so Wu eet T X Fri 08 00 17 00 Repeat X You can set different start and end times for each day of g i Eai 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 Timers When the Run 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 34 Casella CEL CASELLA CEL 63x Environmental 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 number of seconds when noise is not measured between runs to perform housekeeping operations Data sets EL 63x iod of time The measurement data sets optio
28. erm E gt other asui Octave time const F LZeq LASmin LCSmin LZSmin LAFTm3 LAFTm5 LAE i gt gt LAleq Serr LAeqTs0 gt LAlmin LCImin LZImin gt LAITm3 LAITm5 Load defaults No Press gt to toggle selection Hold gt E to set as main value Press E to toggle selection Press E to toggle selection Hold gt E to set as main value pei Hold gt E to set as main value Back s LE r Aa Press the Run Stop control key m gt at step 12 to select or deselect the chosen function Press and hold the m key to set the main SPL value that is displayed in the stop mode Refer to Sec easurement views on page 41 for a description of the User 1 and Use ettings that you can use Timed operation The settings for timed operation control how the instrument starts and stops each measurement run You can choose among three options e You can have full Manual control over when the measurement run starts and stops e You can set the run to start manually and then to continue for a Fixed duration e You can set the run to start and to stop automatically under Timer control 17 Casella CEL CASELLA CEL 63x Environmental Noise Meter Figure 7 explains how to select each of the timed operation modes NOTE CEL For measurement runs that have a long duration you should use a mains DC power supply to operate the instrument Figure 7 Timed operatio
29. ess the gt m key during arun to stop the run 4 3 Screen groups The CEL 63x instrument has groups of operate the instrument and to see th measurements The screens have co edges to help you identify which scree coding on page 5 and Figure up they belong to Refer to Colour colour codes Note that the contents of some vary depending on the model of instrument you are Figure 10 A 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 24 Casella CEL CASELLA CEL 63x Environmental 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 the instrument e User defined details for example the user s name These details must be set up by using the Casella Insight PC software and then transferring them to the instrument umber in a safe location ent if the instrument develops Write the serial number and the firmware versio You should give this informatio
30. esseseosesssses 41 4 5 Connections sie WF AIIE EEE E A E AEE 48 5 SOLAN 0 p PE E CEE E E EEE A 50 5 1 General d T MQ csccccscsccccscscceccvsccceacssceceesscecncvsccecacnsccesacsscecsacsccesaccscees 50 Ba S a 5 MM coir ceea esis ui capensis ciexcr anes acueysaaeusnucucouosyacsassenbnsegubagauenebagasouabanaznnns 50 5 3 Measurement rang MOR ccccsssccssccsscecccsscesscecccsscesscesscsscesssesesescesssesssescesscesssessesessscesses 51 5 4 RMS frequency weightings ccsssssecccccccccesssceeccccceceeessseececccseeeeessceeccccsseeeesseeeseceeeees 51 5 5 Octave and 4 octave MeaSureMen cssscccssssssssssssesssessssesesseeesseeeseeeeeeseeeeeeeeeeeees 51 AO Pek me SUE IC ni e E anton 51 EF PRM SOLO CE O E EEE E A E E EEE E 51 Be NOLE OOT ce ceaeeccsexeteccnentecerecceseereresecatecctecctucetacedcecturetecctacueeceesectceutecctacapecateccsuseuessesoseones 51 5 9 Frequency FESPONSEC ccsecccececceeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeseeeeeeees 51 PAO TME WES NUNS n EN 51 EAL 1911 2610 819 af 6c ene ene ese een ee nee nee ere eer 52 5 12 Reference direction ac cssccescaseccescevadsassinwssexessensesniseesensnoaesensneunseaneeueseansemsseapsensdsnnseesesnesennrs 52 Bate RETENC COMCNUON S era EEEa 52 5 14 Operating environmental conditionS sssssessseeeeeesssssseecesssssseecceesssssseecceesssssseceeeessssssee 52 2 Casella CEL CASELLA
31. for 90 of the tag ii measurement time E The CEL 63x instrument also provides a user defined variable statistical measurement 47 Casella CEL CASELLA CEL 63x Environmental 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 Audio and DC outr o connect a DC power supply to operate the DC plug that has the positive supply connected to the CAUTION You must make certain the DC power input ground is kept isolated from any signal ground Refer to Mains DC supply on page 10 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 A program called Insight is available from Casella CEL You must use this program to download measurements directly from the instrument without 48 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL using Windows Explorer The Insight software includes analysis and graphing tools which you can use to analyse and view measurement runs Contact Casella CEL for more information about the Insight program Audio a
32. hese he functions that are commonly reported for ser defined views that allow you to review and change ment functions Use the cursor control keys to select one of the measurement view options and press the right hand soft control key to set the measurement view The screen shows the word Active next to the measurement view you have set Figure 5 on page 16 explains how to select a fixed measurement view and how to review the functions for the selected measurement view Figure 6 on page 17 explains how to select a user defined measurement view and how to review and change the functions that it uses 15 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Fixed measurement view Figure 5 Set a fixed measurement view 16 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL User defined measurement view Figure 6 Set a user defined measurement view x fs O E Woks egy ss a 3 ACGIH USA 3 ACGIH USA O 4 DOD USA 4 DOD USA J gt i a i a Ui g gt i a i a gt 1 7 A 1 lt i gt N DS Z4 JZ User 1 Settings SPLs Max Min SPLs Peaks SLAVG threshold 40 gt LCF LZF LCFmax LZFmax Lak BT LZpk Response Freefield LAS Lcs Lzs LASmax LCSmax LZSmax LAVGs i LAI LCI LZI LAlmax LClmax LZimax LAvg Q4 LAvg Q5 asap Octave weighting AE a ee ee ee PEGs CC nnnnntnnneunennetnnonnsnnn gt Ute enn t
33. higher than the values shown in the table above 65 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 9 9 Highest level The highest sound pressure level that the CEL 63x instrument has been designed to measure is 140 dB when the instrument is using a microphone that has a 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 adapter is 28 5 V 9 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 Vt When operating from internal AA b from 3 Vto5 V urrent run and turns OFF when the batteries is is to make certain the instrument does 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 15 kPa change in ambient pressure 9 12 Electric field strength greater than 10 V m The CEL 63x instrument has not been tested for field strengths greater than 10 V m 9 13 EMC emissions When tested emissions from the CEL 63x instrument were no greater in one plane or in any mode of operation than another 66 Casella CEL CASELLA CEL 63x Environmental
34. level setup The calibration reference level screen allows you to set the CEL 63x instrument to use the same sound pressure level as the calibrator dB Documents supplied with the calibrator should tell you what 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 Range 93 95 113 115 dB This screen allows you to set the instrument to the same calibration level to an accuracy 0 1 dB Meter Mode The Meter Mode option allows you to set whe instrument displays measurements octave bands tre frequencies band Table 2 below lists the octave and 4 octave and the upper and lower frequencies o Table 2 Octave band fre Centre frequency Hz Band limit Hz Octave octave Lower 25 37 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Centre frequency Hz Band limit Hz Octave octave Lower Upper 38 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Results memory The CEL 63x instrument has 1 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 There are three options available when you view the Results memory e View results Q e Delete View results The daily results scr ist of res
35. 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 The functions used for the measur the noise level and the a e level over time s 60 48 36 24 12 Secs l Overload An arro near the top right hand corner of the screen shows d noise level that exceeds the instrument s measurement the measurement values shown will be incorrect and you may need to consider the validity of any measurements made 27 Casella CEL CASELLA CEL 63x Environmental Noise Meter Calibration mode CEL 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 reference level and the level of calibration ton instrument is measuring IMPORTANT You must make sure the instrumen et to us as the calibrator Refer to the calor Calibration reference level on page setup The Start calibre Calibration prog After you start the calibration process the Calibration progress screen shows a horizontal progress bar and the level of calibration tone that the instrument is measuring After the calibration process finishes this screen shows whether
36. ms 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 e CEL 251 or CEL 252 114 0 dB if using windshield e 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 screen changes to the Status screen 4 Press the Menu soft control key to trument s Settings menu Follow the instruction steps s Range 93 95 113 115 dB Range 93 95 113 115 dB 6 Gently fit the calibrator to the instrument s microphone and press it into position as shown in Figure 4 below 13 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Figure 4 Instrument calibration ese ee L 90 0 dB L 92 7 dB L 93 0 dB S ss Passed al change 0 5 dB Runs Updated 6 6 7 Press the ON OFF key on the c the calibrator ON ator item 1 in Figure 4 to switch The CEL 63x instrumen o elects the calibration screen automatically when it det r ole 1 KHz calibration tone NOTE v Calibration mode o
37. n 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 name of the measurement function for example Lazo Values screen The Values screen shows a list of the centre frequencies for each octave or 3 octave and columns of measurements for example wz oo o9 to show Lago Larmax for each of the centre frequencies Graph screen measurements taken over a period of he graph has a horizontal scale of time and f sound pressure level dB 60 486 36 24 12 Becs c 45 9 7 4 whlhatmax 44 3 Larmin 37 1 The more recent me to the right of the graph The Marker screen allows you to tag noise data with a specific identity using one of four markers For example you can tag the i 92 8 data to identify it as noise from an aircraft or from a road a oe u vehicle 60 48 3 4 12 Secs P d Mark 2 v3 Back erase By pressing Pause when cumulative measurements are being made the Marker screen is activated The Erase option allows you to remove up to the last 10 seconds of noise data from the cumulative result 30 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Menu screens The CEL 63x instrument s Menu mode has three options e The Settings option allows you to change the instrument s setup e The Results memory option allows you t
38. n options easure Start Stop T1 Sf Any 08 00 17 T2 X Mon 08 00 17 p13 X Tue 08 00 17 E gt votes oD TE WM Wed 08 00 17 T X Thu 08 00 17 T6 X Fri 08 00 17 Manual When y control yo pressing the 63x instrument under full manual t and stop each measurement run by Manual control of the 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 You must press the centre cursor key gt m to start the run manually but the instrument will stop the run automatically Measurement Duration 01 00 00 hh mm ss Exit al Edit after the duration you have set If necessary press the centre cursor key gt to stop the run early 18 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 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 Timer control The timer control mode allows you to set the day of the week and T1 SY Any 08 00 17 00 the time when a run starts and stops You can set the instrument m x mon os o0 17 00 T3 X Tue 08 00 17 00 to start and stop one or more runs on different days an
39. n sets how th instrument captures measurements over a f easurements dt urements You can set the instrument to capturen single run These are called cumulat nga Or amp You can set the instrument t create a periodic time history re repeated measurements to Figure u e measurements and Periodic Time History 1 3 C a ee Figure 11 shows three examples of cumulative measurement runs and periodic time histories 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 Results memory to see the captured measurements as a graph or as values The measurements are stored in memory and can be transferred to a computer through a USB link 35 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 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 a 36 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Calibration reference
40. n to the servic a fault NOTE This screen also provides access to syste memory to be reformatted and to set the me PC These tools should be used under the toa hese tools enable the internal ry to be read write from the connected irection of Casella CEL 25 Casella CEL CASELLA CEL 63x Environmental 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 The battery voltage Refer to Battery supply on page 9 for more information about battery types e The type of response field the instrument is using e The pre defined setup used by the instrument You cannot make changes to the displayed settin Measurement stop screen The measurement stop screens show level Different screen views include e The Octave screen e The Graph screen Select the Menu c page 31 ford ions to use the setup screens 26 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Octave and third octaves The Octave and 3 Octave screen includes an octave spectrum graph showing instantaneous and maximum noise levels for 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
41. nd DC output port The audio and DC output port is a 2 5 mm stereo audio jack It has two functions The tip connection 1 provides an audio output from the instrument 3 You can use this output for remote monitoring and for providing a signal to a separate audio recoding device or headphone amplifier 2 The audio output level is approximately 0 4 Vrms full The audio output cor instrument The output impedance is approximately 2 2 kQ 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 audio output 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 49 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 Specifications 5 1 General 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 CEL 63x instrument functionality Digit 3 Character 4 CEL 63 AIBC D Lns N A N A N A N A Logging time history Timers Broadband Octave N A N A N A N A N A N A N A N A 4 octave 5 2 Standards The CEL 63x instrument pro measurements
42. ned y i CAUTION The CEL 63x is a pre 360 instrument if it has been damaged Refer to section 7 arrangements on page 58 for instructions to follow if the aged or has developed a fault instrument Always handle it with care 6 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL A CAUTION The CEL 63x instrument can operate from a battery power supply A CAUTION The CEL 63x instrument is not waterproe use it in the rain Use only batteries of the correct type and do not mix battery types in the instrument Refer to Battery supply on page 9 for advice about battery types Do not try to charge non rechargeable batteries Do not leave discharged batteries in the CEL 63x instrument 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 9 for instructions to install batteries Remove all batteries from the CEL 63x instrument if you will not use the instrument for a long time Always follow local regulations to dispose of used batteries Do novimmerse the instrument in water or 7 Casella CEL CASELLA CEL 63x Environmental 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 When you attach the pre amplifier to the i
43. nstrument make certain the red dot faces towards the top of the instrument ON OFF control key Display screen Soft control keys Cursor control keys Run Stop control key NAAR YW Refer to section 4 2 User controls on page 23 for a description of the soft control keys of the cursor control keys and of the Run Stop control key 8 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 3 Quick start guide 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 USB connection Battery supply You can use alkaline or rechargeable AA batteries to operate the instrument Do not use a mixture of alkaline and rechargeable b ies at the same time The operating time that you can expect fro harged or new set of batteries depends on the battery capacit ou use the instrument s backlight Environmental conditions temperature also affect battery life See section 5 S ications beginning on page 50 for some typical battery life examples IMPORTANT To save power whe automatically if no for five minutes d while mal tomaticall LY How to fit new batteries hen it operates from a mains DC supply Before you begin Read the caution notice about Batteries on page 7 You should fit new or fully charged batteries into the instrument before you start a set of measurement 9 Casella CEL CASELLA
44. o connect the instrument to a P indows XP or iil Windows Vista a i When the instrumen is connected to a PC the re instrument displays a p any run that is currently FA aes active The instrum swi to Active USB mode You should use the d by Casella to download results to the PC See Mini B information about the connection to make for this available da e 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 A CAUTION Always use the Safely Remove Hardware icon in the Notification Area of the PC s taskbar to disconnect the CEL 63x 40 Casella CEL CASELLA CEL 63x Environmental 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 measurement views are called User 1 and User 2 Refer to User defined measurement view on page 17 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 Lavc threshold e Octave weighting e Octave time constant e Measurement functions 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
45. o view information stored in the instrument s internal memory e The Instrument status option displays the instrument s current operating status Settings F There are seven main options in the Settings e Language allows you screens Backlight allo ou to set whether you are measuring Cumulative or a sets with or without a Profile e Meter Mode allows you to select either octave or s octave measurements Measurement View The CEL 63x instrument has up to six fixed measurement views Y o wu 2 OSHA USA and two user defined measurement views 3 ACCHA 4 DOD USA The fixed measurement views have functions that are defined to Ameme 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 31 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL User settings The table below lists the functions that you can change in a custom measurement view This table also shows the range of each setting Refer to section 4 4 Measurement views on page 41 for an explanation of the User 1 and User 2 settings Table 1 User settings User function Average sound pressure level Lave threshold Sound field response Freefield Random A Cor Z Sound pressure level SPL Lar Las Lar Equivalent continuous sound rr pressure level Leo Varro PN Octave weighting Octav
46. ofile data sets Start Stop Period 1 Period 2 Period 3 a A ee Profile 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 21 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 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 profile interval in this example the first s to 11 18 and so on If the Synchronise Time option is disabled period continues to 10 18 the second perio e timers by starting and ending runs chronises both the periodic and the You can also synchronise runs by usi on whole time period intervals Thi profile measurements 22 Casella CEL CASELLA CEL 63x Environmental 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 perman
47. ormally 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 Example A Threshold value is used during the calculation of Lave 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 i environment where the noise levels vary betwee dB and 70 dB the sound level would never exc reshold and the instrument would for the Lave only these seconds contribute to of approximately 40 dB which is ual ambient sound levels in the Lapk sak A weighted also C weighted or Z weighted also Lepx Lzpk g daily personal noise exposure defined by ISO 1999 It Laeg normalised to an 8 hour Criterion Time that is an 8 hour standard day Ler a also L Assuming the noise level for the remainder of the 8 hour reference period is quiet the Lep compares with Lyeg in the following way e Lep is lower than Laeq when the measurement duration is less than 8 hours e Lepais equal to Laeg when the measurement duration is 8 hours e Lepais higher than Laeg when the measurement duration is more than 8 hours Example A noise measurement of duration 4 hours gives an Liegq measurement value of 90 dB A In this case the Lep a value is calculated to be 87 dB A because the measurement duration is half the
48. perates only in Stop mode when the instrument shows red screen bars It does not operate while a run is active ruction steps in Figure 4 to complete the calibration and Note that the calibration takes typically less than 10 seconds to complete and for the screen to display the word PASSED 9 Press the ON OFF key on the calibrator to switch the calibrator OFF 10 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 14 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 3 5 Making a measurement run The CEL 63x instrument is a very powerful measurement tool It 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 20Data sets Measurement view ns you view on the ement or while reviewing The measurement view simply defines which fun instrument s screen either while making a me measurements recorded previously ants You can review the functions displayed but you cannot change them e There are for environmental noise measurements T
49. right any defect in the instrument that is assembly and which becomes apparent 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 messages that might have been displayed The necessary adjustments or repairs will be performed and the instrument returned to you as soon as possible 58 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL After the warranty has expired except on approved accounts service work is undertaken against quotations and all packing and transit costs are charged extra 7 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 59 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 8 Glossary The following list defines some of
50. t use abrasive cau the instrument Check the condition of the batt to the instrument Check for rrosion and arrange any repairs necessary Remove the batteries period of time more Do not allow the instru levels of dust outside of the CEL 63x solvent materials to clean ment if it will not be used for a long e wet or to be exposed to extreme 57 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 7 Servicing and Warranty arrangements 7 1 Inspection and test To make certain the CEL 63x instrument conforms to its publish 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 7 2 Warranty period The warranty period runs for 24 months from the date of receipt with exceptions on certain specialised components supplied by other manufacturers that might be warranted for shorter or longer p s by their actual manufacturers In all such cases the benefit e undertakings are passed on to the user oft f Casella CEL s liability is limited to it not accept liability for any loss resul the results from this equipment ir own manufacture and they do the operation or interpretation of 7 3 Repairs The manufacturer undertal attributable to a amp DCL Gm t
51. the acoustic terms that you can find in this User Manual For additional information contact Casella CEL or your local agent A weighting A standard weighting of audible frequencies designed to imitate the response of the human ear to noise Acoustic calibrator An instrument that provides a reference noise source with a standard level and frequency It is used to calibrate and the check the performance of sound level meters and noise dosimeters decibel dB The standard unit for exposure ing sound level and noise dB A A weighted so decibels levela A weighted meas ents are shown by using the dB C eighted measurements are shown by using the cript C weighting is a weighting used in the Control of Noise at ork Regulations and applies only a relatively small correction to very loud noise sources dB Z 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 Whichever weighting you use to measure sound levels the CEL 63x instrument always stores Z weighted measurements at the same time This is to allow the measurements to be post processed using the Insight software after you transfer them to a PC 60 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Fast time weighting Impulsive time weighting Lar A weighted exposure level Laeq
52. the calibration has passed or failed When the calibration passes it is saved automatically The Exit option allows you to exit the Calibration mode without saving the new calibration 28 same calibration reference level r this information and refer to yr instructions to change the instrument s Calref 93 0 L 92 7 dB aerate eet il L 93 0 dB fT Passed Cal change 0 5 dB Runs Updated 6 6 i Casella CEL CASELLA CEL 63x Environmental 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 Measurement View on page 31 for instructions to change the instrument s setup The Run mode has five types of screen e The Main screen e The Graph screen e The Octave and Octave screen e The Values screen e The Marker screen and as aseries of k Larso o Lareo o Laoso Larosa Wi Octave and 4 Octave screens 365 36 0 355 h 35 5 _ e a View The Octave and Octave screens show measurements for the IN octave or octave spectrum bands and A C Z broadbands w 00 0 31 5Hz V dB atins I p ZCA 16 63 250 tk 4k 16k l View 29 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL You can use the navigation cursor keys to select individual bars on the scree
53. ttings A ak e Set the backlight permanently ON or set the backlight to come on after a key press 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 33 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Measurement start and stop modes There are three methods available to start and stop the CEL 63x instrument s measurements IMPORTANT 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 9 for information about power supply options e Start and stop measurements by pressi you press the Run Stop contr irement mode the instrument starts to ca ea aents when you press the oF 00 00 key It continues to capture or the period set by this screen Exi dew Measure Start Stop Mode Timers T1 A Any 08 00 17 00 T2 X Mon 08 00 17 00 x instrument can start and stop T3 X Tue 08 00 17 00 e e T4 x Wed 08 00 17 00 measurem
54. uencies 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 NOTE 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 48 for information about connecting the instrument toa PC 42 Casella CEL CASELLA CEL 63x Environmental 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 3 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 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 Slo time constant it applies a 1 second time constant to the sound pressure level Slow measurements are identified sin subscript S for example Las Meas
55. ults identified by their Run ID number jle day of measurements Each entry in the the run s d Date 1 Jan 07 Run Start Duration 004 gt 4 49 00 0 04 10 003 D 4 40 36 0 08 19 e when the run started and 002 PX 1 09 12 0 07 00 001 1 08 42 0 00 05 e of the runs to see the summary and the details for that run A series of scree ows information about the run s measurements A graph icon shows that the run includes a profile time history Refer to Data sets on page 35 for an explanation of the periodic time history 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 39 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Ei 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 Instrument status a Select the Status option in Menu mode to see information about Toe the instrument s status This is the same screen that the ee instrument shows after you switch the instrument ON Dewey Mia Refer to Status on page 26 for a description o Status screen wc USB connect mode The CEL 63x instrument has a mini that allows you t
56. urement functions ctions for each user defined the screen has a counter to show how many ple 7 9 43 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Figure 12 User defined measurement view View View 1 ISO EU ctive 1 ISO EU 2 OSHA USA 2 OSHA USA 3 ACGIH USA 3 ACGIH USA 4 DOD USA 4 DOD USA User 1 Settings Peak s ax Min s LAVG threshold 4o Ler i Car LCFmax LZFmax LApk LZpk Response Freefield LAS LCS LZS LASmax LCSmax LZSmax LAVGs i LAI LCI LZI LAlmax LClmax LZimax LAvg Q4 LAvg Q5 eee gt Octave weighting D adecrescseleaiecidisincta Dyed ed gt ole eda Len eee gt other seseeeeeeeeceseamaeneneneny Octave time const F LZeq LASmin LCSmin LZSmin LAFTm3 LAFTm5 LAE i is r gt LaAleq LAeqT80 m gt LAlmin LCimin LZimin gt LAITm3 LAITm5 Load defaults N Press PH to toggle selection j Press ro to toggle selection m Press PE to toggle selection Hold gt E to set as main value l Hold gt E to set as main value E Hold gt Hi to set as main value ore Press PE to toggle selection Press PE to toggle selection Ln frequency weighting determined Ln frequency weighting determined by the main SPL value by the main SPL value The CEL 63x ent has four screens that show the functions available for 1 The first screen shows Sound Pressure Levels SPLs and Equivalent Continuous Sound Pressure Levels
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