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CEL-63x User Manual - TRS

1. CASELLA CEL CEL 63x Environmental Noise Meter HB3356 01 User Manual CASELLA MEASUREMENT Regent House H Wolseley Road mpston Bedford MK42 7JY U K Phone 44 0 1234 844 100 Fax 44 0 1234 841 490 E mail info casellacel com Web www casellameasurement com CASELLA CEL 63x Environmental Noise Meter CEL Contents Sono 2 1 ITO DCH e TIT 4 1 1 Structure OF this User WAMU All xvcccactunudenconuencoessaedeantavassantesassmondcacneseteedsaetavesceteacstmanerencess 4 1 2 s 6 2 dcziif lg 8 3 EEK e Te Goa caecacevssasonoseasiencrsedsate E er 0s esos Uca oa E 9 3 1 POW I ABRIR ILU des tascunesvnc cauaessecentsaseceerone 9 Bee USNS TAG ese se 11 PCE UO WC ya esirin srair e R aE EEEa 12 SA Calbratine the INSEE MI ssocacucawavcscsassceswecdsevssctesesncednsuncscsaseatdecdanvenecancbadedsuewsaanasersceeoact 12 3 5 Making a measurement run cccccccssesssssssccccccceenssseececceceneesseseececesseeausseeseceseeseneeeees 15 4 Detailed description sss sss sss senenn enen 23 4 1 Microphone and pre amplifier cccccssescccsssscccccsscccccesccccecesecccsceeecessensecesseescessasees 23 TE U 27 d cei se e 23 A SCPC OM BIOUDS eeso E E E E 24 4 4 Measurement VieWS sessssseeeessssssseeseesssssserreeressssserreesesssssesreeeessssse
2. 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 35 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 The measurement data sets option sets how the CEL 63x instrument captures measurements over a period of time You can set the instrument to capture measurements during a Ei Syashronise dines single run These are called cumulative measurements You can set the instrument to capture repeated measurements to create a periodic time history Figure 11 Cumulative measurements and Periodic T
3. 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 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 42 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 42 to print some screens Print Report Select the Printer icon to display the Print Report Options screen 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 Leq Max If narrowband results are stored this gives the option to print the Leg 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
4. e gt 8kHz to 12 5 kHz 1 5 dB 150 Deg 0 34 0 41 0 42 0 29 0 51 0 45 0 98 1 28 1 60 1 84 1 24 0 66 1 90 1 52 2 05 1 97 2 59 4 15 4 48 4 45 4 72 5 00 4 87 5 81 6 57 Fii 7 62 17 Casella CEL CASELLA CEL CEL 63x Environmental Noise Meter 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 Nominal Actual Frequency Frequency Hz Hz om s em oo 000 oo o0 oo ove on ow eornm om o2 om vm om Lem eme em em ue sor fom om foo om sm or oz arem oot em a ew omen pue oo vo ooo om om ove oo vos ore 00 os enon omn om om f oee ove aor oor oor f om ot os Le sree ome amr ane ame o cs uer ove uos s v m om oa fom f oof oo ae f oef oof ow aof ao oor o f aof ors T on Tor me aar om Dom oat s os oo osi oar om ose om os o rr om so eso mue om Dom om se one am vie ome vz om am e er ow m n om awe ow T oof oo Ton fao or fou Taz oar f ar oe oor ve om on om o oee om oor om os on oo oo ime om oes ss om ase oes on e ses Pom ove vor o s v vm ow 5 E os wo sms om pem pom pum ooe ne one ove crum com ae nee is en sm ome mem om us ow om noo e o os o aw m m eo a vm a0 sno sene om em poe ox o
5. for remote monitoring or recording PC WAV file recording or headphone applications Approximately 0 4 Vrms full scale output corresponding to 96 dB Output impedance is approximately 2 2 kO Load impedance should be as high as possible and a coaxial connection cable of between 0 5 metres and 10 metres length should be used 58 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 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 5 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 indi
6. 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 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 reference 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 bookmark panel and in the table of contents to jump to that
7. Run duration Each screen also has a pause control II 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 L 3764 and as a series of bars against a vertical scale ler 340 T Ln s screen The Ln s screen shows statistical Ln measurements for the run Lugo 39 50 Depending on model refer to page 54 Larsaa 365 Laroo 360 Le 355 Larsa 35 5 Octave and 1 3 Octave screens T NET The Octave and 1 3 Octave screens show measurements for the octave or 1 3 octave spectrum bands and A C Z values D e JP a B lai a tl lin Z CA 16 63 250 Ik 4k 16k You can use the navigation keys to select individual bars on the screen The screen shows the following measurements digitally at 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 30 Casella CEL CASELLA CEL 63x Environmental 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 ihe oo o9 example to show Laca Larmax for each of the centre frequencies rn ra Depending on instrument model additional frequency bands and m a statistical values may be viewed by using the naviga
8. are identified by using the subscript S 69 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL SPL The sound pressure level This is the basic physical measure of noise and is normally expressed in dB Threshold The sound pressure level below which sound measurements are excluded from the calculation 70 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 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 o dB to 140 dB 3 Microphone reference point The microphone reference point is the centre of the microphone s diaphragm The 0 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 Frequency probability k 2 calibrator electrostatic actuator Bruel amp Kjear 4226 Bruel amp Kjear UAo033 31 5 0 1 0 1 0 1 0 1 0 2 l 0 2 63 3 0 2 0 2 0 2 71 Casella CEL CEL 63x Environmental Noi
9. 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 x Figure 2 Setting the time and date 13 33 26 13 31 40 29 May 10 E fl E So 9 ME VY wv 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 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 e CEL 251 or CEL 252 114 0 dB if
10. intensity High levels of backlight intensity reduce the battery life Typically 12 hours measurement time with backlight OFF 5 21 Internal clock Date and time accuracy better than 2 seconds per day 5 22 Languages English default English US date time format Spanish French German Italian Portuguese Chinese Brazilian Portuguese 57 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 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 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 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 Limited to either 1 999 individual runs or 2 400 separate runs of 24 hours duration with 1 minute periods and 1 second profiles 5 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
11. measurements and is equivalent to Leg 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 Example A Threshold value is used during the calculation of Layg 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 Ifa 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 Lays However if the sound level exceeds the 80 dB Threshold for only a few seconds only these seconds contribute to the Lave 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 applied to measurements When using this setting the instrument applies a 1 second time constant when calculating sound pressure levels Slow measurements
12. only once or you can set EEE 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 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 18 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Figure 7 Measurement controls T2 X Mon 08 00 17 00 gt T3 X Tue 08 00 17 00 UepeeemceseP 14 R Wed 08 00 17 00 T5 X Thu 08 00 17 00 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 2 4 6 8 eS Vo UO o E E Es EE 4 aT D Loa 7 S L Eg gM yy gt 4 eWKe o o co IVA wv v2 wv Statistical Values gt TNs Includes LHH LNSO LINGO LN95 LN 3 Press E to toggle selec
13. page 52 for information about connecting the instrument to a PC 46 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 5 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 Vs 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 9 47 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Figure 12 User defined measurement view m O View View 1 SO EU Active 1 SO EU 2 OSHA USA 2 OSHA USA 3 ACGIH USA 3 ACGIH USA 4 DOD USA 4 DOD USA 5 Environmental 1 5 Envi
14. 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 41 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 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 measurement setup will require two sets of frequency bands to be printed using more paper Disabling both Octave options above just
15. 26 5 16 8 25 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 72 Casella CEL CASELLA CEL 63x Environmental 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 12 inch to 4 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 lower e The instru
16. 3x Environmental Noise Meter CEL i NOTE ban 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 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 66 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 8 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 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 The standard unit for measuring sound level and noise exposure A weigh
17. 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 Lra 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 50 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 values The statistical functions Lio Lao Loo and Los show the sound pressure levels that are exceeded for 10 96 50 96 90 and 95 96 Other Measured Ln Values of the measurement period respectively For example the measurement L is the level exceeded for 10 of the measurement time and Loo is the level exceeded for 90 of the measurement time 9 Press gt E selection Ln f ting determined e main SPL value to toggle requency weigh by t The CEL 63x instrument also provides a user defined variable statistical measurement 51 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 Figur
18. 63x Environmental Noise Meter CEL 0 Degree 0 Degree Expanded Free Field Free Field uncertainty Hesponse Corrections of with wind with Wind Corrections Screen Screen k 2 Hz Hz dB dB dB dB dB dB tooo 9x95 09 09 o7 ae 16 046 1050 105252 o8 os o7 16 15 os 29 17216 06 906 os as 15s os 400 1 535 09 09 14 23 23 08 1 0 1000 15899 09 09 19 28 28 060 woo 1760 10 10 21 e 31 oso 180 ime 40 10 24 34 34 oso 1900 1853645 0 10 e7 or 87 oso 0x0 199258 13 18 26 so 39 oso 1 Corrections below 250Hz are 0 0dB ODegree ODegre Free Field Free Field Response Corrections Effect of Wind Screen Nominal Actual Frequency Frequency 76 Casella CEL CEL 63x Environmental Noise Meter CASELLA CEL Table 8 CEL 63X with CEL 251 Microphone directional response dB relative to zero degrees Orientation of CEL 63X Display at 0 degrees relative to ground Nominal Actual Frequency Frequency 10 20 KI 40 50 60 70 BU 90 100 110 120 130 140 Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg 01 01 Hz Hz G G G G G G G G G Maximum expanded uncertainty of above data with 95 probability k 2 7100 7079 45 8000 7943 27 8500 8413 94 9000 8912 49 e 500 Hzto1 kHz 0 3 dB e gt 1kHzto 4 kHz 0 5 dB e gt 4kHzto 8 kHz 1 0 dB
19. EL 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 e Printed circuit boards e Cases e Displays e Interfaces keypads e Pump assemblies e Internal sensors 64 Casella CEL CASELLA CEL 63x Environmental 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 lifetime warranty The product must be returned within 30 days of either the
20. O Limo Lzrso Lzroo Lzros Lzr variable 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 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 Lze LZFmax Lzsmax LZFio LZF50 Lzroo Lzros LZFvariable Lceq LCFmax Lesmax Lra LCF50 Lcroo Lcros LCFvariable e LAeq Larmax LASMax Lario Largo Laroo Laros Larvariable Only Lzr are stored The Casella Insight data management software allows calculations for La and Lc C Profile Results For each profile interval the following results are produced e Broadband L eg Lared Larmax Lasmax LAtmax LCPEAK e Profile start time e Overload and battery fail flags 61 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL D Marker Event 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 Insight can show these events 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 measurement view
21. 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 Leg 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 L eg 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 68 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Lasmax also Larmax Lavg Average sound level Lepk also Lepx Lzpk Peak Slow 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
22. 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 Lavyg 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 5 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 62 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 6 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 period of time more than one mo
23. asurement run mode 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 004 4 49 00 0 04 10 003 l 4 40 36 0 08 19 the list to view a list of the runs stored for the selected date S S A PATA 001 1 08 42 0 00 05 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 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 36 for an explanation of the periodic time history View results The View results screens allow you to see the results of measurement runs that are stored in the CEL 63x instrument s memory There are three options available when you view the Memory results e View results e Delete e Printing Only available when printer CMC73 is connected 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 40 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL
24. ave 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 5 6 Peak measurement A C or Z weighted from 65 0 dB to 143 3 dB 5 7 RMS detector Digitally derived true root mean square RMS detection 0 1 dB display resolution 5 8 Noise floor Total inherent noise including microphone thermal noise at 20 C e 20 dB A Class 1 e 24 dB A Class 2 Electrical noise floor 17 5 dB A 5 9 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 55 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 11 Correction filters Built in correction filter for random incidence sound pressure fields 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 kHz 5 14 Operating environmental conditions Humidity 5 96 to 90 RH non condensin
25. cale measurement mode refer to the System Tools menu see the note on page 25 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 E S 2 t L p I o 2 E E a sa zZ 9 S p z S E E 2 t5 G D E O V E C 5 o o o9 GL o L O E n o 9 o o lt o a a DC Saig cain C C C Environmental che v e e Ka Environmental 5 2 Standards SISI Automatic On Off timers sf fs Statistical parameters Ln 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 EC 60651 1979 IEC 60804 2000 ANSI 81 4 1983 ANSI S1 43 1997 R2007 e 1 1 Octave and 1 3 Octave Filters comply with EN61260 1996 Class 0 and ANSI S1 11 1986 Order 3 Type oC 54 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 3 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 5 4 RMS frequency weightings A C and Z filter weightings satisfying IEC 61672 1 2002 Class 1 5 5 Octave and 1 3 Octave measurement Oct
26. ces LDN LDEN CNEL In periodic mode the following set of results is produced for each of the period intervals during a run In cumulative mode the following single set of results is produced covering the whole run 59 Casella CEL CEL 63x Environmental Noise Meter e Sound pressure levels SPL O O O O O O O LAF Ler Lzr Las Les Lzs Lar Ler Lz CASELLA CEL Note that the SPLs are displayed but are NOT stored e Equivalent continuous sound pressure levels Leq O O O O O Laeq Lceq Lzeq Lateq Lc La Laeqrso e Maximum and minimum sound pressure levels O O O O O O oO O OQ e Maximum and Minimum times LAFmax Lcrmax Lzrmax Lasmax Lcsmax Lzsmax Latmax Letmax Lzimax Lar min Lcrmin Lzrmin Lasmin Lesmin Lzsmin Latmin Lctmin Lzimin 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 O O Lapk Lepk Lzpk e Peak times The time for each of the three peak levels is stored to 1 second resolution 60 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL e Average sound pressure level with exchange rate Q o Lavsa O Lavgos each with threshold o dB or 70 to 90 dB e Other measurements O Larcrms Lar Tms Lar Tma Lar Tms Lar O O e Statistical parameters Ly O Lario Larso Laroo Laros Larvariable O Lra Lcrso Lcroo Lcros Lcrvariable
27. chronise runs by using the timers by starting and ending runs on whole time period intervals This synchronises both the periodic and the 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 1 2 inch 12 7 mm microphone This is a pre polarised microphone that uses a permanently 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 The Class 1 microphone CEL 251 has 50 mV Pa sensitivity e The Class 2 microphone CEL 252 has 30 mV Pa sensitivity 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 23 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Na
28. e 13 Connection ports 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 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 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 52 Casella CEL CASELLA CEL 63x Environmental 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 e The tip connection 1 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
29. e 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 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 a J e Fixed duration measurements In the fixed duration measurement mode the instrument uu starts to capture measurements when you press the o1 00 0 Run Stop control key K B key It continues to capture v measurements for the period set by this screen INE EN Measure Start Stop e Timer measurements modo EEEEEEEEEEEENI T1 SY Any 08 00 17 00 T2 X Mon 08 00 17 00 The CEL 63x instrument can start and stop DOO Tue 08 00 17 00 T4 X Wed 08 00 17 00 measurements automatically on preset days and times H3 uec T6 X Fri 08 00 17 00 Repeat x You can set different start and end times foreach day of iE 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
30. ent for any purposes for which it has not been designed A 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 7 Servicing and Warranty arrangements on page 64 for instructions to follow if the instrument has been damaged or has developed a fault 6 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL A CAUTION The CEL 63x instrument can operate from a battery power supply e 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 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 9 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 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 Use
31. ent measurement view 32 Casella CEL CASELLA CEL 63x Environmental 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 45 for an explanation of the User 1 and User 2 settings Table 1 User settings User function Range Average sound pressure level 0 dB or 70 dB to 90 dB Lave threshold Random Sound field response Freefield Octave weighting A C or Z Octave time constant F fast S slow Sound pressure level SPL Lar Las Lar Equivalent continuous sound Laeq pressure level Leg Lateq Maximum and minimum sound pressure level Peak sound pressure level Average sound pressure level with exchange rate Q Other measurements refer to Larcrms Larcrms Measurement views on page 45 Statistical functions Ln Environmental indices Lar max M E Lima LAF min Ema Larmia Lapk Lave Q4 33 MS Lesmax S Lcrmin Lcsmin erin Lepk Lavg Qs Lar Tms Lar Tms Lao La variable LDEN Lzrmax La La Erona zm Dum 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
32. ente E E E A 58 B20 ISNA ota sci oan csoneashosoncans E EE E A E E ANE 58 MER AERO isc cate E EEE E E A 58 o CONNEC Y oe E E E E O 58 p 205 FV ANG Ole da Sel e E E E E 59 E B2 a EEEE EE E E E ER 62 6 Care and Malle ial Oe cccusdscaceceisescussaighetdsausssesecntesessessieuiessescadoueto coed oansucbicasanvisicesaeaws 63 7 Servicing and Warranty arranGeMents cccsscccccssssccccssssccccssssccccessscceesssecceessecceeeess 64 7 1 VSO CCG Nit Ge SU EE OTT 64 7 2 Lifetime Warranty Terms and Conditions sss sss sees eee eee eee 64 7 3 Mami IE m m 65 77295 1050 977 mm 66 8 IOS SAU RE e em 67 9 Additional information scccccssssccccssssccccssscccccssssccccesscccceesseccceesscceccssecceeesceceeeessces 71 9 1 Sound calibrators Level corrections eese eene enne 74 D2 Response GilalaClel ISU C Sa css qui beret oves ob DOR eee 75 3 Casella CEL CASELLA CEL 63x Environmental 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 54 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 5 Specifications beginning on page 54 The CEL 63x instrument uses the latest digital signal processing technology to
33. esponse 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 45 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL L avg threshold The Layg 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 Layg over the measurement period equivalent to Leq Lay is a function used in OSHA measurements Normally 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 i
34. etting 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 The Graph 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 32 for instructions to use the setup screens 26 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Octave and 1 3 Octaves x The Octave and 1 3 Octave screen includes an octave spectrum Le 002 graph showing instantaneous and maximum noise levels for r each filter band plus A C and Z broadband measurements le Short lines above the individual bars show the maximum f l adi measurements for each filter band ZCA 16 63 250 tk 4k 16k 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 l i L The Graph screen shows a single line graph using a vertical scale 58 of noise level and a horizontal scale of time w The bar moves up and down to show the noise level and the a graph scrolls to the left to show noise level over time Ld Overload An arrow pointing
35. 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 7 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 messages that might have been displayed 65 Casella CEL CASELLA CEL 6
36. fety 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 23 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 instrument 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 m allows you to start and to stop a Run Press the gt Bi 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 instrument s initialization screen changes to the Status screen 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 m You can set the instrument s clock to the exact time
37. ffer different views Refer to section 5 Specifications beginning on page 54 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 views 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 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 Freefield Octave 16 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL User defined measurement view m m m Figure 6 Set a user defined meas
38. g Temperature 10 C to 50 C Class 1 o C to 40 C Class 2 Pressure 65 kPa to 108 kPa 5 15 Effects of temperature Electrical stability of the instrument lt 0 2 dB over the range 10 C to 50 C 5 16 Effects of humidity Less than 0 5 dB over the range 25 to 90 RH non condensing relative to the value under reference 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 56 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 5 18 Microphones CEL 251 12 inch Class 1 50 mV Pa pre polarised back electret CEL 252 12 inch Class 2 30 mV Pa pre polarised back electret Microphones use a separate pre amplifier CEL 495 MIC1 High range l4 inch high range microphone 2 8 mV Pa pre polarised back electret MPA1 1 2 inch to 14 inch adaptor 5 19 Calibration Auto calibration by application of a 1 kHz calibrator tone nominal level 114 dB or 94 dB 1 CB 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 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
39. he screens when the instrument is in Measurement stop or in Measurement run mode LEQs LAleq LAeqT80 toggl 0 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 on page 51 for an explanation of the statistical functions The L values are ALWAYS calculated using the Fast octave 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 subscri
40. htly 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 110 or CEL 111 calibrator and the certified output from the calibrator is 113 98 dB and you intend to use the instrument 74 Casella CEL CASELLA CEL 63x Environmental 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 set the calibration level to 94 04 dB You must round this va
41. ies 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 7 You should check that the batteries have adequate battery life before you begin a measurement Replacement batteries should be new or fully charged 9 Casella CEL CASELLA CEL 63x Environmental 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 Case
42. ime History E i Start t Cumulative Stop 1 2 3 Profie n Start Stop Period 1 Period 2 Period 3 T T a Profile 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 Memory results to see the captured measurements as a graph or as values The measurements are stored in memory and can be transferred to a computer by USB 36 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 The Casella Insight data management software is used to combine and graph the periodic data 37 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Calibration reference level setup The calibration reference level screen allows you to set the CEL 63x instrument to use the sa
43. ion 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 Fs There are seven main options in the Settings screen 4 FA 9o C e Measurement View allows you to set the measurement w uu g view or to create user defined measurement views 1 3 n 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 setup allows you to set the instrument to use the correct sound pressure level for the calibrator e Meter Mode allows you to select either octave or 5 octave measurements on B amp C models Measurement View The CEL 63x instrument has up to six fixed measurement views ve 2 OSHA USA and two user defined measurement views 3 ACGIN USA 4 DOD USA 5 Environmen tal 1 Environmenta 12 The fixed measurement views have functions that are defined to meet national regulations You cannot change these functions LEN NN This screen shows the measurement view that is active and allows you to select a differ
44. lla 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 charge 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 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 keys A and B e The Navigation keys C E 4 lt e The Run Stop 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 sa
45. lue 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 9 2 Response characteristics Table 7 Casella CEL 63X with CEL 251 Microphone Free Field response with and without Wind Screen 0 Degree 0 Degree Expanded 0 Degree 0 Degree Free Field Free Field uncertainty Free Field Free Field ae Response Corrections of Response Corrections with wind with Wind Corrections Screen Screen K 2 dB dB dB dB dB dB 316 23 o1 01 00 o1 o f ote 398831 01 01 00 ot o1 oie 630 63096 00 00 f o1 04 9 0 047 100 310000 01 01 f 01 O00 oo 019 1250 125892 00 00 f o2 o2 02 049 2000 1995 26 02 02 04 02 02 Nominal Actual Frequency Frequency Hz Hz 0 21 25 0 25188 04 04 05 09 09 oa 3 0 siez os 08 os os os oz aso 398139 09 09 o7 02 02 os 409 aans 00 90 0r 0 r O92 4 amp 0 4468 00 oo o7 o7 o7 os am sose o1 9 os os os os 8x9 asar 03 03 03 06 06 035 8x0 semsa o4 04 os os os os e0 anga 06 96 05 11 1 94 9x9 9uos os os os 19 13 om 75 Casella CEL CASELLA CEL
46. me sound pressure level as the calibrator Documents supplied with the calibrator should tell you what sound pressure level it delivers at the 1 kHz reference tone This amp D 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 Meter Mode The Meter Mode option allows you to set whether the CEL 63x PHS m instrument displays measurements octave or 3 octave frequency bands Table 2 below lists the octave and octave centre frequencies and the upper and lower frequencies of each band Table 2 Octave band frequencies Octave 1 3 Octave Lower Upper Lower Upper cutoff sadi cutoff cutoff eibi cutoff frequency Hz y frequency frequency Hz y frequency Hz Hz Hz Hz 22 31 5 44 63 38 Casella CEL CEL 63x Environmental Noise Meter Octave Lower cutoff frequency Hz Upper cutoff frequency Hz Centre frequency Hz 1420 2840 2840 5680 39 CASELLA CEL 1 3 Octave Lower cutoff frequency Hz Upper cutoff frequency Hz Centre frequency Hz Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Memory results 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 me
47. ment 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 15seconds after a 5 kPa change in ambient pressure 13 Casella CEL CASELLA CEL 63x Environmental 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 9 1 Sound calibrators Level corrections Sound level calibrators apply sound pressure to a microphone in a closed cavity The microphone s response in a free field to a 1 kHz tone will be slig
48. n 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 p R NAN YS CO Kh OO Profile 21 Casella CEL CASELLA CEL 63x Environmental 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 120r 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 syn
49. ncluded 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 Lays However if the sound level exceeds the 80 dB threshold for only a few seconds only these seconds contribute to the Layg 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 5 octave band results e A weighting is the usual method of adjusting the measured sound pressure level so that the measurements represent the frequency response of the human ear e C weighting 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 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
50. nth e Do not allow the instrument to become wet or to be exposed to extreme levels of dust heat or cold 63 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 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 of the product Products covered by the Casella C
51. o or 2r n om non ero em m am vie sme seme om ov es con e o oor en soe s e e ear 2m 29 oo eme emm om oan oos om oze e i om am 20e m e om m 2m m Le roses om are vos om e sar ono eo sr 2m vr 9 om 2 a 55 ewe ee om em ow pae aer ase m ise ner nem ae e m sm ace m ewe omo om ore oss am os rer m er om m or om 4 se oe we eme em oo rs oan o 150 9 om esr am m o m en m 50 eme seo om ove om o or o5 e a we s e ow 7 am so sor owe ses om ore om em sae on eo 2m ser sm m e om om se ie Los rossese om aoe oss sec aoe os eve ove swe e so vor eo 72 se 7 Le ee em ove poss ao m 21 m ove ar nm ser nm m 0m pem om e eno om or o 10s 190 o i om ser m n i s om om 732 e sez vm ose ose nee zoe eo ses are sam vm s om ens sor tre n Maximum expanded uncertainty of above data with 95 probability k 2 0 10 20 10 40 50 60 70 BU 90 100 110 120 130 140 150 Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg Deg e 500 Hzto1 kHz 0 3 dB e gt 1kHzto4kHz 0 5 dB e gt 4kHzto 8 kHz 1 0 dB e gt 8kHz to 12 5 kHz 1 5 dB 78 Casella CEL
52. on tone that the instrument is measuring u o After the calibration process finishes this screen shows whether tnt Calref 93 0 the calibration has passed or failed Le 93 0 dB aee When the calibration passes it is saved automatically Bia pdi i 28 Casella CEL CASELLA CEL 63x Environmental 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 29 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 32 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 1 3 Octave screen e The Values screen e The Marker screen All the measurement run screens show the Run number and the
53. 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 4 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 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 5 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL 1 2 Safety 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 A 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 instrum
54. 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 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 42 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL e R data e 2 stop bits 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 numbe
55. pt identifies the frequency weighting used when calculating the Leq function for example Lce is the C weighted Leg 49 Casella CEL CASELLA CEL 63x Environmental 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 Leg 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 Laeqrso 15 an A weighted measurement of Le 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 TONNEN and minimum SPL functions LASmax LCSmex LZSmex eaba The subscripted letters identify the frequency weighting and the ise tse s time constant to be used for the measurement and whether the 5 measurement is a maximum or a minimum Peaks Layg and other functions Peaks The Peaks functions are Lark Lop and Lzpx Peaks These functions record the peak levels of noise using A Cand Z 0009 15 weighting LAFTm3 LAFTm5 LAE LA vg LAITm3 LAITm5 Lavg is the time averaged noise level with an applied exchange rate measured during the run The two options are to use exchange rates Q5
56. r 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 Instrument status Q Select the Status option in Menu mode to see information about em the instrument s status This is the same screen that the Time Aden aan instrument shows after you switch the instrument ON o LIEN View User 1 Refer to Status on page 26 for a description of the Status screen os a T USB connect mode The CEL 63
57. r 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 s red dot faces towards the front of the instrument ON OFF key Display screen Soft keys Navigation keys Run Stop key oe Refer to section 4 2 User controls on page 23 for a description of the Soft keys of the Navigation keys and of the Run Stop key 8 Casella CEL CASELLA CEL 63x Environmental 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 USB connection 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 5 Specifications beginning on page 54 for some typical battery life examples You should also carry a spare set of batteries IMPORTANT To save power when operating on batter
58. recoding 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 25 for more information The output impedance is approximately 2 2 kQ 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 e 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 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 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 CEL 259 A To set the 53 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL instrument to the 140 dB or the 165 dB full s
59. ronmental 1 6 Environmental 2 6 Environmental 2 8 User 2 gt o p lt E SPLs Max Min SPLs Peaks LAVG threshold 40 LC LZ LCFmax LZFmax LZpk Response Freefield LAS Lcs 17s LASmax LCSmax LZSmax LAVGs E LAI LCI LZ LAlmax LCimax lZimax LAvg Q4 LAvg 05 p gt Octave weighting i EO PLEOs rrer Null wb TS aenean gt Other Octave time const F ice MET LASmin LCSmin LZSmin LAFTm3 LAFTm5 LAE m gt LAleq LAeqTBD LAlmin LCimin LZimin LAITm3 LAITm5 L Press B to toggie selection iz Press B to toggie Kaler Ran Bil Press PIE to toggie celecton Hold KR te cel as main valse E Hold gt E ho selas main vaise E Hold KR M cel as main value Variable Ln Value Other Me ed Ln Valu M ot v 3 2 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 Pressure Levels Leqs 2 The second screen shows Maximum and Minimum SPLs The third screen shows Peaks averages Lavgs and other functions 4 The fourth screen shows Statistical Values Ln CS 48 Casella CEL CASELLA CEL 63x Environmental 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 t
60. se Meter 5 Linear operating range CASELLA CEL 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 Weighting A C Z C Peak 31 5 Hz 30 to 100 32 to 137 38 to 140 65 to 140 1 kHz 30 to 140 32 to 140 38 to 140 65 to 143 Linear operating range 4 kHz 30 to 141 32 t0139 38 to 140 65 to 142 8 kHz 30 to 138 32 to 136 38 to 140 65 to 139 12 5 kHz 30 to 134 32 to 132 38 to 140 65 to 135 Weighting 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 Combined Max dB Combined Typical dB Microphone Thermal dB Electrical Max dB Electrical Typical dB 15 0 17 5 16 0 18 5 18 0 21 0 16 8 20 6 24 0
61. 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 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 14 Casella CEL CASELLA CEL 63x Environmental 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 20 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 o
62. sseeeesssssereeeeessssss 45 4 5 CONE CONS orne uu E E EEO 52 5 SPOCIE ON aa a T T TES 54 5 1 SIS Trail ENTRE A ROE E E E A 54 B o comm 54 b 3 Measurement rang Buc quietas DSi uni nu Dose ara cee aa 55 BG RMS MeQUENCY WEISNIINGS isccisceiasceccnstsnnedescnesseannasasenseadoddanscooavacteedecensdedseadeecoduentosoeteses 55 5 5 Octave and 13 5 Octave measurement ss sss sese eee ee eee eee 55 T EA MCaSULC MEM occceus sccsvecscenewtassceaasaendedunteseaacsssudeavdshsoasusevedsaniote sdeaossaopecbeassoesenssentens 55 p RM CeO nrc ceoostudieI senna tcusarcawvensecansesauechequsussesaucedveswanacconsecunssnasesseoanadearoessaseaseeowestes 55 BO NOC OO ean E 55 DO Jeq usHcy reSpONSE serrr rreri O EEEa EE Er EEEE 55 Gedo Le iunc 55 Ed COC CUO IN HC lt 56 BAO RETAN E Ce CUO N e E E E 56 c13 Reference conditions et 56 5 14 Operating environmental conditions eese eene 56 2 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Bete Effects of MISSE T 56 wO BOCES Or WIN A RETE 56 5 17 Storage environmental conditions sss sees sese sees sees eee eee 56 cM II are c en mm 57 E MEE rU 57 5 20 P wer SUPpPIY P T X 57 Rs MEE alEO mm 57 c MEE Eciam 57 5 23 Electromagnetic compatibility sesseesesseessseeesssscesssecesssecesssecesseecosseeeosseeesssecessseceesseee 58 5 24 Effects of AC power frequency fields eese eene 58 Be FROG MOU ES escasos ed
63. surement run You can choose among three options Figure 7 explains how to select each of the timed operation modes NOTE ddl For measurement runs that have a long duration you should use a mains DC power supply to operate the instrument 17 Casella CEL CASELLA CEL 63x Environmental 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 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 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 amp PES 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 Measure tart Stop The timers mode allows you to set the day of the week and the Modo nma time when a run starts and stops You can set the instrument to bannie start and stop one or more runs on different days and at different 7 4 HESS 2 Repeat x You can set the pattern of runs to occur
64. ted 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 67 Casella CEL CEL 63x Environmental Noise Meter Fast time weighting Impulsive time weighting Lar A weighted exposure level Laeq A weighted equivalent continuous sound energy level also Leeg Lzeq Lar also Las and Lay CASELLA CEL A standard time weighting applied to measurements Most measurements are made using the Fast time weighting When using this setting the instrument applies a 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 time constant to rising signals and a 1500 ms time constant to decaying signals when calculating a sound pressure level
65. 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 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 sd 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 They also allow selection of either 140 dB or 165 dB full scale modes 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 s
66. the settings when necessary E 2 Language m v 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 x A F K l ih Mh The language options are as follows e UK English 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 m allows you to use the instrument in poor ambient lighting d conditions or in darkness m The Backlight screen allows you to change the following backlight s settings exit i ran 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 34 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 th
67. tion a SS WU K A Ww m d 4 gt Cumulative measurements A cumulative measurement produces Start Stop 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 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 Start Cumulative Stop of fast measurements made at the same time as a cumulative i n measurement 1 2 3 Profile The profile recording supports a more limited set of functions including La Lareq Lcpk Larmax Lasmax Larmax 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 1 2 5 10 15 20 30 60 seconds e 2 5 10 15 20 30 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 duratio
68. tion keys to 1 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 s level dB er The more recent measurements are to the right of the graph NN 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 60 48 36 24 12 Secs 1 14 Mark gt 2 v3 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 31 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 Memory results opt
69. upwards 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 e Casella CEL CASELLA CEL 63x Environmental 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 Cal ret 93 0 reference level and the level of calibration tone that the L 90 0 dB instrument is measuring x i i 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 38 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 progress Cal ret 93 0 screen shows a horizontal progress bar and the level of Le 92 7 dB calibrati
70. urement view ES H View View 1 ISO EU Active 1 ISO EU P o 4 9 92 9 2 OSHA USA 2 OSHA USA ES 3 ACGIH USA 3 ACGIH USA O tas e does gt 9 E t 6 Environmen tal 2 n s 1 3 Qct 8 User 2 y e eo S m m S R Li lt lt zz N ss 3 33 a a S 3 amp amp n T f Sel PY PN CE 5 lt gt ww ww Max Min SPLs LAVG threshold 90 LCFmax lZFmax Response Freefield LASmax LCSmax lZSmax LAVGs Lai Loa Lz LAimax Climax LZimax LAvg O4 LAvg 05 Octave weighting A gt LEOs e EN LCFmin LZF min gt Other Octave time const F O S os LASmin LCSmin LZSmin LAFTm3 LAFTm5 LAE E m lae ZED tacqtss Laimin LCimin LZlmin LAITm3 LAITm5 nner PPP T Press gt E to toggle selecton m Press dd to toggle selec don Prets gt to toggle selection um Hold 4 i cot os main value mu Hold PPI uu Hold Pa to cet s main value xn 10 13 16 19 A A a P Y 8 4 x 144 4 EK 14 4 x 17 4 2 v 9 v 12 v 19 v 18 Press the Run Stop control key M 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 Section 4 4 Measurement views on page 45 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 mea
71. using windshield e CEL 251 or CEL 252 113 9 dB without windshield 1 Removethe 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 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 m 1140 dB O da Range 93 95 113 115 dB 4 7 KR gt lt gt e lt tR P VY wv wv 6 Saveand 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 13 Casella CEL CASELLA CEL 63x Environmental Noise Meter CEL Figure 4 Instrument calibration Calref 93 0 Cal ref 93 0 Cal ref 93 0 L 90 0 dB L 92 7 dB L 93 0 dB a Passed Cal change 0 5 dB Runs Updated 6 6 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 e NOTE Calibration mode operates only in Stop mode when the instrument
72. vigation 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 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 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 4 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 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
73. x instrument has a mini USB port that allows you to connect the instrument to a PC running Windows XP or DE Windows Vista or Windows 7 a When the instrument detects that it is connected to a PC the instrument displays an option to stop any run that is currently 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 43 Casella CEL CASELLA CEL CEL 63x Environmental Noise Meter USB port on page 52 for information about the connection to make for this purpose The PC recognises the instrument as a removable drive and identifies it by an available drive letter for example J IMPORTANT imn 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 44 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 r

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