CEL-200 SERIES DIGITAL SOUND LEVEL METERS
Contents
1. 3 PREPARATION FOR USE PROCEDURE Refer to Figure 2 1 Open the Battery Cover 2 Check the battery compartment is clean and dry 3 Fit three new AA Alkaline or NiMH batteries according to the polarity in the battery compartment 4 Close the Battery Cover Notes If there is evidence of leakage from previously installed batteries contact Casella at the address given in Contact Details before using the instrument Caution Do not mix battery types Always fit new batteries when the battery indicator A shows battery strength is low to prevent the instrument switching OFF while in use Figure 2 Preparations for Use Back to Index CASELLA CEL 4 GENERAL OPERATION 1 Press and release the Power ON OFF key to switch ON During the software initiation the screen will display the firmware version e g V035 05 indicates issue 5 of the firmware and the serial number Such as 0108121 followed by the Main Measurement screen Refer to Figure 3 Note During power up CEL 242 and CEL 246 models will display time date and memory settings as described in Section 8 If you do not wish to alter these settings on CEL 242 246 models do not press any keys and the instrument will proceed to the main measurement shown below 2 Ifthe instrument requires calibration refer to CALIBRATION for details 3 Fit the windshield over the microphone before attempting any measurement LAF pP 423 4 04125 4 a gt 4 Oom o LE n2. 244 246 ONLY The parameter to measure average noise can be set to Leg or Lavg This is dependent on local legislation which sets the exchange rate Q to either 3 or 5 respectively The Q value determines the increase in dB associated with the doubling of risk to hearing damage Q 3 means that the increase in hearing damage risk doubles every 3dB increase in noise respectively Q 5 means that risk to hearing damage doubles every 5dB increase in noise level Use Leq Q 3 for EU based workplace noise regulations and Lavg Q 5 for US OSHA based noise legislation Note If unsure please refer to your local legislation and application standards LOGGING INTERVAL SCREEN CEL 246 ONLY In Figure 8 C the currently selected logging interval is displayed and is also shown above the Right key B Press the Right key B to change the logging interval Press Left key A to exit the settings menu and return to the measurement screen 11 CASELLA HAMM SS 4 00 08 F405 a8 Ors 814943 fy Page Sede a x Figure 8 Logging Interval Screen CEL 246 only Back to Index 12 CASELLA CEL 7 CONFIGURATION MENU The Configuration Menu Refer to Figure 9 is used to make changes to the Display Contrast Calibration Level and the Signal Input Source To access the Configuration Menu press and hold the Right key when switching the instrument on by pressing the Power ON key DISPLAY CONTRAST Figure 9 Refere
3. IEC 61672 1 2002 Class 2 ANSI 1 4 Type 2A Total noise floor typically lt 33dB A Overall frequency response as per IEC 61672 1 2002 Class 2 ANSI 1 4 Type 2A Fast Slow and Impulsive according to IEC 61672 1 2002 ANSI S1 4 Type 2A 20 C air temperature 65 relative humidity 101 325kPa atmospheric pressure Nominal reference level 114 0dB at 1kHz Free field perpendicular incidence OPERATING ENVIRONMENTAL CONDITIONS Humidity Temperature Range Pressure Effects of Humidity 5 to 90 RH in the absence of condensation 0 40 C 65 to 108kPa Less than 0 5dB over the range 30 to 90 relative humidity non condensing relative to the value at reference conditions STORAGE ENVIRONMENTAL CONDITIONS Humidity Temperature Range Pressure MICROPHONE CALIBRATION POWER SUPPLY External DC Batteries 0 to 90 RH in the absence of condensation 20 to 60 C 65 to 108kPa Internal electret capsule 10mV Pa nom 3dB within Y preamplifier Auto calibration by application of 1kHz 114 or 94dB calibrator CEL 110 2 or CEL 110 1 1dB calibration range 5VDC via USB 5 pin mini B 3x AA Rechargeable NiMH or Alkaline cells 17 CASELLA CEL Battery Life Typically 35 hours Power Consumption 65mA ELECTROMAGNETIC COMPATIBILITY Instrumentation is designed and tested to comply with the following EMC and ESD Standards IEC 61000 4 2 Testing and Measuring Techniques Electrost
4. for three seconds feature prevents the CEL 200 Series being accidentally switched OFF during use Back to Index 9 CALIBRATION It is recommended that an acoustic calibration using a CEL 110 2 or CEL 110 1 calibrator be performed before and after taking measurements PROCEDURE 1 Switch ON the Acoustic Calibrator Refer to the Calibrator Instruction Manual 2 Check the Acoustic Calibrator has a 114dB or 94dB output 3 Make sure the instrument is set to the 60 130dB range 4 Fit the Acoustic Calibrator firmly over the microphone The instrument automatically detects a 1kHz tone from a 94 or 114dB Calibrator and enters Calibration Mode Refer to Figure 5 CASELLA CEL Figure 5 Calibration Mode Screen 5 Press left key A to perform a calibration or press the right key B X to Exit When calibration is complete the Calibration Complete screen will be displayed Refer to Figure 6 Figure 6 Calibration Complete Screen Back to Index 6 INSTRUMENT SETTINGS 1 The Instrument Settings can be changed from the Measurement screen Refer to Figure 7 2 Press and release the Left key A An Arrow X will be displayed beside the Settings key indicating the Settings Menu has been enabled Note that the reset symbol HH will be replaced by the relevant settings to be changed as described below 3 Press and release the Left key A repeatedly to cycle through the Settings screens Note that the sc
5. s Notes usually follow the text to which they apply Notes can contain advice hints extra information and explanations Back to Index CASELLA CEL 2 INTRODUCTION CEL 240 242 244 and CEL 246 Congratulations on your purchase of a CEL 200 Series Digital Sound Level Meter subsequently referred to as the instrument The instrument has been designed to perform accurate noise measurements through a wide range lt is a completely digital sound level meter designed for stable reliable performance fully compliant with international sound level meter standards This instruction manual is to help you get the most benefit from your CEL 200 Series Digital Sound Level Meter and to ensure accurate noise measurements The CEL 200 Series range comprises of 4 models the features are summarised in the table below CEL 242 CEL 246 Model Selection Instantaneous and maximum levels Logging of 1s levels Selectable Logging interval of 1 10s Averaging Leq or Lavg Compliance with ANSI 81 4 IEC 61672 60651 Compliance with ANSI 1 43 IEC 60804 requires dB24 to access data stored on CEL 242 and CEL 246 models The instrument is illustrated in Figure 1 CASELLA CEL DET LAFmax 123 4 Figure 1 CEL 200 Series Digital Sound Level Meter 1 Microphone 2 Power ON OFF key 3 Display 4 Left Key 5 Right Key 6 USB PC Output 7 Auxiliary socket 2 5mm Stereo Back to Index CASELLA CEL
6. CASELLA CEL CEL 200 SERIES DIGITAL SOUND LEVEL METERS Go to Preface HB3348 01 OPERATOR S MANUAL CASELLA CEL CASELLA USA CASELLA ESPANAS A CASELLA CHINA CHH Regent House 17 Old Nashua Road Pol gono Eur polis HH Hb Wolsley Road 15 Amherst Calle C n 4B At at AR SIX ZR TT W118 911 28 sll ard a 28230 Las Rozas Madrid M 100738 MK42 7JY U K Toll Free 1 800 366 ae ha pi ic eee Phone 44 0 1234844100 2966 Phone 34 91 640 75 19 a Fax 44 0 1234 841 490 Fax 1 603 672 8053 Fax 34 91 636 01 96 THEE E mail Emaf E mail info casellameasurement cn info casellameasurement com info casellaUSA com online casella es com Piik www casellachina cn Web Web www casellaUSA com Web www casella es com www casellameasurement com CASELLA CEL PREFACE Back to Cover 1 MANUAL CONVENTIONS This section of the manual details the priority of Warnings Cautions and Notes that may apply throughout this manual 2 INTRODUCTION This section of the manual gives a brief overview of the equipment 3 PREPARATION FOR USE This section of the manual describes the first steps to using the CEL 200 Series Digital Sound Level Meter 4 GENERAL OPERATION This section of the manual describes the basic operating procedures 5 CALIBRATION This section of the manual details the Calibration method 6 INSTRUMENT SETTINGS This section of the manual describes the how to use the Instrument Settings 7 CONFIGURATION
7. MENU This section of the manual describes how to make changes to three specific settings 8 TIME AND DATE CEL 242 246 ONLY This screen displays the time and date 9 MEMORY DELETION CEL 242 246 ONLY This section details how to delete all loggings from the instrument memory 10 SET TIME AND DATE CEL 242 246 ONLY This section details how to set the time and date 11 SWITCH OFF This section of the manual describes the shut down procedure 12 EQUIPMENT SPECIFICATION This section of the manual gives the Specifications and Characteristics for the CEL 200 Series Digital Sound Level Meter 13 SERVICE AND WARRANTY This section of the manual explains Casella s after sales policy on the instruments covered in this manual 14 ENVIRONMENTAL CONSIDERATIONS This section of the manual stipulates the environmental policies Casella have committed to for the manufacture of instruments 15 DECLARATION OF CONFORMITY This section shows the declaration of conformity for the CEL 200 series instrument CASELLA CEL 1 MANUAL CONVENTIONS PRIORITY ONE PERSONAL SAFETY When a WARNING is included in the text the WARNING will always precede the text it applies to WARNING Indicates personal injury will result if proper precautions are not followed PRIORITY TWO EQUIPMENT PROTECTION A CAUTION will always precede the text it applies to CAUTION Indicates equipment damage can result if proper precautions are not taken Note
8. ated electromagnetic field tests IEC 6104 6 Electromagnetic compatibility EMC Immunity to conducted disturbances induced by radio frequency fields Tested at 10 V m or greater LVD Standards A pplicd Instrument contains no hazardous voltages Power supplies conform to the requirements of the following safety standards Harmonised Standard EN60450 Safety of IT equipment EN60335 2 29 Safety of Electrical Appliances Product Specific Standards EC 1672 1 2002 Electroacoustics Sound level meters This is to certify that the above product s have been designed tested and built to comply with the requirements of identified product specific standards and the EMC Directive 2004 1084 EC Fa See Stephen Tearle Head Technical Services Date of Issue 30 10 2008 END 21
9. atic discharge immunity tests IEC 61000 4 3 Electromagnetic compatibility EMC Radiated electromagnetic field tests IEC 61000 4 6 Electromagnetic compatibility EMC Immunity to conducted disturbances induced by radio frequency fields Tested at 10V m or greater EFFECTS OF AC POWER Less than 0 5dB change in 74dB A 925Hz reference FREQUENCY FIELDS level when subjected to 80A m AC magnetic field at 50 and 60Hz DISPLAY Resolution 128x128 Mono Graphics LCD Update Rate 0 5 seconds update rate CONNECTIVITY USB USB 2 0 via mini B socket For SPL output software required weighted as per selected frequency and time weightings AUX Socket 2 5mm stereo AC output provided for DAT tape PC wav file recording or headphone applications Approx 0 5V RMS Full Scale Deflection FSD A weighted output on selected range Minimum load impedance 22kQ Optional DC Output via internal configuration 0 to 3 3V DC for FSD on selected range Output corresponds to selected weighting 2kQ Output impedance AC input used for electrical calibration switched on via configuration menu DATA STORAGE CEL 242 amp CEL 246 Models only Memory Size 419 000 Data Points Number of Measurements 100 Maximum Data Points Per 65 515 Measurement File Storage Format CSV file compatible with MS Excel Parameters Stored CEL 242 1s sound pressure levels CEL 246 1 10s average value either Leq or Lavg dependent on settings Bac
10. emory status in Figure 10 C displays 100 meaning the memory is full No more data can be stored To delete the memory press the Left key A to access the Memory Deletion Screen Refer to MEMORY DELETION SCREEN Ensure any measurements are downloaded via dB 24 prior to deletion Figure 10 D shows the time and date currently set within the instrument Press the Right key B to access the Set Time and Date screen Refer to SET TIME AND DATE SCREEN Note If no changes are require to the memory or time date settings then do not press any keys and the instrument will proceed to the measurement screen Back to Index 14 CASELLA CEL 9 MEMORY DELETION SCREEN CEL 242 246 This screen is accessed from the Time and Date screen described above Initially press the Right key B if the intention is to delete the data in the memory Then press the Left key A to confirm deletion as shown below in Figure 11 When the data in memory has been deleted the screen will show 0 and return to the Time and Date screen automatically Press the Right key B and return to the Time and Date screen if it is decided not to delete the data in memory Note Ensure and saved results are downloaded via dB24 before deleting the memory Figure 11 Memory Discharge Screen Back to Index 15 CASELLA CEL 10 SET TIME AND DATE SCREEN CEL 242 246 This screen is accessed from the Time and Date screen described above When this screen is acc
11. essed Refer to Figure 13 the HH hours will be highlighted Press Right key B to set the hour Press Left key A to advance to the MM minutes Press Right key B to set the minutes Press Left key A to advance to the SS seconds Press Right key B to set the seconds Use keys A and B in the same sequence to set the date When the time and date have been set press Left key A to return to the Time and Date screen gt HH MM SS 22 34 56 YYYY MM DD 2008 02 02 3 TS Figure 13 Set Time and Date 11 SWITCH OFF When the required measurements have been taken press and hold the Power Key refer to Figure 14 A for three seconds to switch OFF the instrument A door display will be shown counting down 3 2 1 Back to Index A gt Figure 14 Switch OFF Back to Index 16 CASELLA CEL 12 EQUIPMENT SPECIFICATION SPECIFICATION STANDARDS RANGE RMS FREQUENCY WEIGHTINGS NOISE FLOOR FREQUENCY RESPONSE TIME WEIGHTINGS REFERENCE CONDITIONS CHARACTERISTICS IEC 61672 1 2002 5 Electro Acoustics Sound Level Meters Group X instruments Performance Class 2 IEC 60651 1979 Type 2 ANSI S1 4 type 2A Specification for Sound Level Meters CEL 244 246 Models IEC 60804 2000 Type 2 ANSI S1 43 1997 R2007 Type 2 Display range 30 130dB A RMS available in 2 ranges 30 100dB and 60 130dB Linear operating range 10dB above noise floor A and C filter weightings satisfying
12. ipment goes into landfill sites which amounts to about 6 million tons of waste every year Removal of these substances will reduce both health risks and damage to the environment CASELLA MEASUREMENT AND RoHS Products manufactured by Casella are classified under Category 9 Monitoring and control instruments as per Annex IA of the WEEE directive and as such are exempt from the requirements of ROHS As an environmental company Casella is committed to minimising the full life cycle impact of its products and actions on the environment Although Casella products are exempt we are committed to working towards the directive and as such are actively involved in a program to work towards our core product ranges being fully compliant to the demands of the ROHS directive by 2010 If the scope of the directive changes during this period we will revise our strategy to ensure full compliance with the directive at all times Back to Index 20 Back to Index CASELLA CEL 15 DECLARATION OF CONFORMITY CASELLA CE Declaration of Conformity Casella CEL Ltd Regent House Wolseley Road Kempston Bedford MK427JY UK Instrument Type CEL 24Y Series Sound Level Meters The above instrumentation has been designed and tested to comply with the following EMC and ESD Standards IEC 61000 4 2 Testing and Measuring Techniques Electrostatic discharge immunity tests IEC 6100 4 3 Electromagnetic compatibility EMC Radi
13. ith a detailed description of the fault and a list of any error messages that m ay have been displayed Back to Index 19 CASELLA CEL 14 ENVIRONMENTAL CONSIDERATIONS WEEE DIRECTIVE The WEEE directive aims to raise the level of recycling of electrical and electronic equipment EEE and encourages designers to create products with recycling in mind Potentially a key part of this directive is to make all parties aware and more responsible for collection treatment and recovery of WEEE CASELLA MEASUREMENT AND WEEE et All Casella products shipped from 13th August 2005 and thereafter will be marked in accordance with the European standard EN 50419 2005 to indicate new EEE waste Historical EEE waste sold before this date will be handled according to national legislation in European countries RoHS LEGISLATION The ROHS is a directive from the European Union EU and bans the use of certain substances used in the making of certain electrical and electronic equipment after July 2006 There are six major substances on the list lead cadmium mercury polybrominated biphenyls PBB s polybrominated diphenyl ethers PBDE s and hexavalent chromium Cr VI This directive stems from the impact these substances have to humans and the environment from both extraction of raw materials and their eventual disposal as well as occupational exposure and exposure following disposal In Europe over 90 of electrical electronic equ
14. k to Index 18 CASELLA CEL 13 SERVICE AND WARRANTY The manufacturer undertakes to rectify any defect in the instrument directly attributable to faulty design or assembly and which becomes apparent during the warranty period In order to take advantage of this warranty the instrument must be returned carriage paid to the manufacturer s factory or accredited agent where necessary repairs will be carried out The warranty period runs for 24 months from the date of receipt of goods with exceptions on certain specialised components supplied by other manufacturers that may be warranted for shorter or longer periods by their actual manufacturers In all such cases the benefit of these undertakings will be passed on to the user CASELLA CEL s liability is limited to items of their own manufacture and they do not accept liability for any loss resulting from the operation or interpretation of the results from this equipment To obtain repair under warranty the instrument should be packed and returned in it s original packing or an equivalent either to CASELLA CEL s local agent or in the case of U K domestic sales to the CASELLA CEL Service Department at Bedford UK Please include the following information Instrument Type s Serial Number s and Firmware Version Number s Customer name and address Contact name and phone number details of any PC and Software involved including Version Number s reason for returning the equipment w
15. n FA AFmax 123 4 Oem 1234 A O O A A Oe DH 0H yv FV pP CEL 240 242 CEL 244 246 A Battery Indicator B Over Range Indicator C Sound Pressure Level D Analogue Display Bar E Measurement Scale F Maximum Sound Pressure Level G Instrument Settings H Reset Average Sound Pressure Level Figure 3 Main Measurement Screen CASELLA CEL 4 A Bargraph Refer to Figure 4 A or Time History Refer to Figure 4 B will be displayed Refer to INSTRUMENT SETTINGS to change the Time and Frequency Weightings or to change the type of display 8 LAF Ft rae 33 4 j LAF 123 4 dB 123 4 dB 80 ieh H 480 40 i 60 s0 400 5 L 123 4 LALO 1234 9 a o co d a Lao mx 123 4 LAleq 123 4 LAFmax 123 4 min gt i had EE oer AD Y y Ir IR Y CEL 240 242 CEL 244 246 Figure 4 CEL 200 Series Bargraph and Time History Screens 5 The screen will display the instantaneous and maximum sound pressure levels along with the relevant Time and Frequency Weighting Refer to Instrument Settings to change these settings Additionally CEL 244 and CEL 246 instruments will display the average level Leq or Lavg since the reset button was pressed To reset the maximum sound pressure level and average level press and release the key 6 When the required measurements have been taken press and hold the Power ON OFF key Refer to Switch Off for three seconds to switch the instrument OFF Note The press and hold
16. nce X Press Right key B to adjust the Contrast When the contrast is considered ideal press Left key A to accept the changes and progress to the Calibration Level screen SIGNAL INPUT SOURCE Figure 9 Reference Y Note This option is for the use of acoustic laboratories only This screen allows the Signal Input to be routed from the inbuilt microphone or from an external signal connected via the auxiliary 2 5mm headphone socket Press Right key B to toggle between microphone input and alternating current input The default Power Up selection is Microphone Input Press the Left key A to confirm any changes CALIBRATION LEVEL Figure 9 Reference Z This screen is used to set the nominal output level ofthe acoustic calibrator e g 114 0dB Press Right key B to adjust the calibration level Refer to the calibration certificate for the acoustic calibrator for the calibrator output level Press Left key A to accept the changes and progress to the main measurement screen ian roa o tT AC Y Y GP e QOQ 0 gt gt gt Figure 9 Configuration Menu Back to Index 13 CASELLA CEL 8 MEMORY AND TIME DATE SETTINGS CEL 242 246 This screen only appears when the instrument is switched on and only on CEL 242 or CEL 246 models J aden 100 SPO PP ee ee eee ot Poe ee HH MM SS 22 34 56 D yyy mm DD 2008 02 02 yg O Figure 10 Time and Date Screen The m
17. reens displayed will be dependent on which CEL 200 series model purchased CASELLA CEL 4 Press Right key B to make changes to each setting as described below in sections A G 40 60 80 LAFmax 123 4 100 Figure 7 Instrument Settings 5 Current settings will be saved when the instrument is switched OFF Note that if no keys are pressed for approximately 5 seconds the CEL 200 Series will exit the settings screen and return to the normal measurement screen This will be evident as the arrow X will not be beside the spanner symbol A RECORDING DATA CEL 242 246 ONLY On the CEL 242 and CEL 246 models the option to record store data to the memory is available This is the first option available when the settings key age q is pressed The symbol REC will be shown and when Right key B is pressed data will be stored in the memory The CEL 242 will store 1 second sound pressure levels and the CEL 246 will store levels at a selectable logging interval as described in section G below The symbol will then change to display the current run number e g 3 M shows it is run number 3 Pressing the B button again will stop the run and store the results to memory A maximum of 100 runs can be stored before memory is full and dB24 software must be used to view the stored measurements If the memory is full this settings option will not appear Please refer to MEMORY AND TIME DATE SETTINGS DISPLAY TYPE The Main Di
18. splay can be toggled between Bargraph and Time History Refer to Figure 4 A and B respectively by pressing the B key TIME HISTORY This setting displays how the maximum sound pressure has varied over the last 1 minute 1 1min or 5 minutes Jmf Smin well as the sound pressure levels To toggle between these three options press and release the Right key B 10 CASELLA CEL MEASUREMENT RANGE 30 100dB or 60 130dB Care should be taken to select the correct measurement range depending on the noise climate being measured Make sure the noise being measured is within the range selected If the Over Range indicator is displayed the incorrect range has been selected Refer to Figure 7 C If the noise level is lower than the selected measurement range dB will be displayed TIME WEIGHTINGS FAST Use this setting for comparatively stable noise SLOW Use this setting for noise with a slow variation IMP Impulse Use this setting for noise with rapid variation and impulsive noise Note If unsure please refer to your local legislation and application standards FREQUENCY WEIGHTINGS Frequency weightings are used to represent the human ears response to noise A WEIGHTING Make this selection for general noise measurements C WEIGHTING Make this selection for very high noise levels Note If unsure please refer to your local legislation and application standards AVERAGE SETTING CEL
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