DC112d / DC112
Contents
1. H 36 2 DC112d DC112 User s manual 1 GENERAL DESCRIPTION The DC112 is a high performance dosimeter in accordance with standards IEC 61252 2002 and UNE EN 61252 1998 A1 2003 Los dos modelos DC112d y DC112 disponen exactamente de las mismas caracter sticas como dos metro The difference between the two models lies in the fact that only the DC112 is also a real time spectrum analyser in octave bands with filters in accordance with IEC 61260 1995 A1 2001 and UNE EN 61260 1997 A1 2002 The DC112d DC112 is the ideal instrument for measuring noise in accordance with Directive 2003 10 CE which adapts to recent technical progress the regulation on the health and safety requirements regarding the exposure of workers to the risks arising from noise In The Member States this applies to the corresponding transposition to national law The DC112d can be converted into a DC112 for which it is necessary to acquire the module EF112 either when purchasing the DC112 or subsequently To acquire it simply contact your official CESVA distributor give them the serial number of your SLM and place an order for the module Within a few days you will receive a CD containing the activation programme The DC112d DC112 enables you to measure simultaneously all the parameters needed to assess the levels of noise to which workers are exposed when wearing or not wearing hearing protectors SNR HML To do this it measures simulta2. ccccecccececeeecseecseeeeeteeeceeeseeeseeeeneeeseeeueeseeteeeteeeteeeneenaes 31 6 10 Varm alenip M Ue 31 6 11 Influence of temperature sesssesssssseseeenneennnmmennenmennnmnnen nennen nnns 31 6 12 iniuence Or NUMIA RR 32 6 13 Influence of atmospheric PFESSULE cceccceecceeceecceecceeceseeeseeeeeeeeeeeeeteeetseeeneeaneeaaes 32 6 14 Electromagnetic Compattbllity cece cece secee cece eeceeese cece eeseeeeeeeseeeeeeeseeteeeseeeseeesees 32 6 15 Batteries and external SUPDIY cece cccceecceeceeeeeeseeeeeeteetaeeeeeseeesseceeseeseueseeaseneeeees 33 6 16 Dimensions and WEIGNH ccccseccseeceeeceecceeceeeceeeceeecaeecseecaeeeeeseeesaeecaeeseeeseeesensaees 33 SITE C MDAU eee eee eee E E nee E EE EE E ae ee eee 33 EML Eca 11o SE E E eee eee nee ne T 33 Cal boa 2 cee ne E ee ee eee eee 34 64 0 CCESS OFRES en inim MEE PON M Ma deua MM T ee eee es 34 APPONI qi FUNCIONS SEERE AE RE Er ne rae ttre ne a nn ere 35 TA ADOT MLO Ol WIC MONS so Rm E 35 7 1 1 Continuous equivalent sound pressure level cccececeseeee cece ceseeeeeeeseeeeeeeaeeeeeees 35 7 1 2 Peak sound pressure level cc eccecc cece ecceeeseeceeeceeceeceeeceeeeeceeseeesseceeeaseteeseeeneeaes 35 7 1 3 Equivalent daily exposure level cccccccccsecceeeeeeeeeeeeseeceeesseteeeeecgeeseeteeseeeseesaes 35 TES ere Minis deo E RETI TNTT 36 FEED SE PE
3. While a measurement is paused If you may continue to consult the functions measured prior to the temporary interruption of measurement While a measurement is paused Il the device can be switched off To do this press 0 When it is switched on again the measurement will remain on pause II and can be n resumed To resume measurement press 19 This characteristic of the DC112d DC112 allows measurements to be carried out for workers with split shifts or special shifts eg weekends It also enables the battery to be changed without the need to make two measurements 2 3 6 Ending a measurement gt E By pressing you end the measurement or recording The measurement status indicator will change from gt to W 2 3 7 Consulting measured data While the DC112d DC1 12 is not measuring li you may consult all the functions measured To consult them apply the same procedure as described in section O on viewing data while measurement is in progress 2 4 Overload indicator The DC112d DC112 is equipped with an overload indicator for each function If overloading occurs during a measurement the symbol will appear before the function affected by overloading When a function registers overload its corresponding measurement may be incorrect During the overload the indicator appears in the bottom right hand corner of the screen 2 5 Menu of the DC112d DC112 Register management and settings This section details the opti
4. Optional accessories 34 DC112d DC112 User s manual 7 Appendix A Functions 7 1 Definition of functions 7 1 1 Continuous equivalent sound pressure level Lrand LY This is the linear average of the instantaneous sound pressure square from the beginning t4 to the end t The duration of the measurement is therefore T to t t 1 fp tog L a t4 0 pt instantaneous sound pressure Do reference sound pressure 20 uPa T duration of the averaging The equivalent continuous sound pressure level function is ideal for measuring variable sound events such as compressors or sound events that due to their long duration cover a wide range of sound pressure levels such as machinery measurements The DC112d DC112 measures the equivalent continuous sound pressure level L and Lr The equivalent L level is the equivalent level of the interval measured that is for each instant it gives us the value of the equivalent level from the beginning of the measurement to that instant When a measurement has been completed the L value corresponds to the equivalent level of the entire measurement from beginning to end The equivalent level L1 is the equivalent level corresponding to T integration time a programmable parameter It is displayed every T time period In other words every T time period the DC112d DC112 shows the equivalent level of the last T time period 7 1 2 Peak sound pressure level Lpeak Peak The
5. When the built in memory is full no more recordings can be made and no more final results saved If you attempt to do this the MEMORY FULL message will appear on screen If the battery of the DC112d DC112 runs out during a recording the DC112d DC112 will interrupt the recording PAUSE show the message BATTERY FLAT on the screen and switch off To continue the measurement see section 3 2 1 If the power source of the DC112d DC112 is cut off suddenly during a recording removal of the battery or the USB connection the recording will be incomplete It will not be able to be 24 DC112d DC112 User s manual viewed with the DC112d DC112 the message RECORDING INCOMPLETE will appear on screen when this is attempted However it will be possible to download it to a computer using Capture Studio Following these measurements more registers can be recorded as long as the capacity allows 3 2 1 Continuing a recording after the DC112d DC112 has been switched off The DC112d DC112 allows for a recording that has been interrupted pause If to be continued after switching off the dosimeter To do this proceed as follows e Interrupt the recording in progress by pressing m e e The recording will stop and the recording status indicator will change from to II e Switch off the DC112d DC112 by pressing 0 When you wish to restart the measurement e Switch on the DC112d DC112 by pressing 0 e The measurement will ap
6. corresponding to measurement time t Noise dose DOSE corresponding to measurement time t evaluated according to the criterion level Lc Measurement time t Projected equivalent daily exposure level Lex snp with frequency weighting A Projected sound exposure E Projected noise dose DOSE evaluated according to the value of the projected time t Time history of the equivalent continuous sound pressure level with A frequency weighting and integration time T Apart from the aforementioned functions corresponding to the measurement time when it carries out a recording the DC112d DC112 saves the time history of the following functions every T period Equivalent continuous sound pressure level with A and C frequency weighting corresponding to the integration time T Lat y Ler Peak sound pressure level with C frequency weighting corresponding to the integration time T LcpeakT Equivalent continuous sound pressure level with or without A frequency weighting corresponding to integration time T for each one of the octave bands centred on the frequencies 63 125 250 500 1000 2000 4000 y 8000 Hz Only DC112 5 1 4 Description of the DC1120 DC 112 The most important parts of the DC112d DC112 are detailed in the following diagram 1 2 3 Microphone Prepolarised lapel condenser microphone GESWA P007 Support clip Adjustable clip to fix the microphone to a lapel or helmet Microphone extension
7. 3 2 Beginning a measurement First of all ensure that the sound level meter has no measuring process in progress W If it n has gt or ID press to stop it Next set the DC112d DC112 to dosimeter mode and choose the screen you want to display numerical numerical with projected values spectrum analyser or time history with the SCREEN Key Once you have selected your screen press to start the measurement process 2 3 3 Function display The DC112d DC112 measures all functions simultaneously Described below are the different ways of displaying the acoustic functions for the assessment of noise in the workplace while measurement is taking place If you change the kind of display screen or the octave band selected spectrum analyser screen measurement will continue uninterrupted Numerical screen This screen shows in real time the following information c r Pe Hi H gE i HEHE i8 e Daily noise exposure level Lex a with frequency weighting A e Sound Exposure E e Noise dose DOSE e Equivalent continuous sound pressure level with A and C frequency weightings corresponding to the measurement time La and Let e Peak sound pressure level with C frequency weighting corresponding to the measurement time Lcpeak e Criterion level Lc e Measurement time t By pressing the projected parameters are displayed The projected parameters determine the sound exposure if the level measu
8. The battery must be Let dB ab 3 replaced Lcpeak ell tat gt To replace the batteries the device must be switched off To remove the battery of the DC112d DC112 open the battery compartment and pull upwards on the back of the battery as shown in the figure 10 DC112d DC112 User s manual Once the batteries have been replaced simply switch on the device by pressing 0j and press to continue the measurement The DC112d DC112 can also be powered via the USB port To do this connect the USB port of the DC112d DC112 8 to a USB port of a PC with the cable provided When it is connected the symbol will appear where the battery symbol was RECOMMENDATIONS If the DC112d DC112 is likely to be unused for an extended period of time remove the batteries from the DC112d DC112 in order to prevent damage caused by battery leakage We recommend that you always carry new replacement batteries 2 1 3 Connection and disconnection of the microphone Before connecting or disconnecting the P007 microphone of the DC112d DC112 dosimeter make sure the DC112d DC1 12 is switched off To connect the microphone to the dosimeter hold the male plug of the microphone 4 in the middle Insert it into the female socket 5 of the dosimeter and press until it clicks To disconnect the microphone hold the male plug of the microphone in the middle 4 Pull upwards on the plug until disconnects IMPORTANT Do not pull on
9. The following table shows the A and C frequency weightings along with their tolerance Frequency A Weighting C Weighting Tolerance dB fee Oo o w Oo o 0mm 9 9 38 Hz dB dB 89 3 9 s 3 9 9 9 409 9 9 339 6 4 Sound pressure level range according to frequency Typical values for A weighting frequency Frequency Maximum level Minimum level dB rs 001138 L 2 95 52 Typical values for C weighting frequency Frequency Maximum level Minimum level dB 103992 HE REE BE FE 3x w 9 w w 9 39 w o 39 18 9 4 12 9 29 6 5 Octave band filters Frequency evaluation system Base 10 Reference attenuation 0 dB Margin of frequencies for real time operation 31 5 Hz a 16 kHz Octave band central frequencies Nominal central frequency Exact central frequency 125 Hz 125 89 Hz 4 kHz 2 511 9 Hz 6 6 Microphone CESVA P007 Prepolarised 72 condenser microphone with preamplifier incorporated Nominal sensitivity typical 11 2 mV Pa Constant pressure to free field correction Frequency Hz Correction dB Frequency Hz Correction dB 1 000 125 00 2 000 4 000 80 00 8 000 Typical frequency response Frequency Relative response Frequency Relative response Hz dB Hz dB 1 000 00 200 00 4 000 8 000 30 DC112d DC112 User s
10. cable 1m flexible extension cable for the CESWA_ P007 microphone LEMO type microphone connector Male LEMO type coaxial connector for the CESVA P007 microphone LEMO type dosimeter connector Female LEMO type coaxial connector for the CESVA DC112d DC112 dosimeter analyser 6 Screen Backlit LCD graphic screen 7 Soft touch membrane keypad Extra flat anti dust keypad especially designed for work 10 11 12 13 14 15 16 in industrial environments USB connector Mini B type USB connector for full speed bidirectional USB 1 1 digital communication Characteristics plate On this plate the brand model and all the standards with which the instrument complies are detailed CE mark European conformity mark Serial number Here the dosimeter s serial number is given Tripod support Tripod support with standard 74 W screw TR 40 or TRO50 Support clip Support clip to attach the DC112d DC112 to the worker s belt WEEE mark Symbol that indicates the selective collection of electric and electronic devices Battery protection cover Cover for battery protection only to be removed to change it Manufacturer Here the details of the manufacturer are given 6 DC112d DC112 User s manual CESVA model DC112 IEC 61252 20 02 IEC 61260 1995 A1 2001 UNE EN 61252 1998 A1 2003 UNE EN 61260 1997 A1 2002 7 MODE SCREEN ae Ce ox 1 5 Screen While the DC112d DC112 is carry
11. gt DOSIMETER option from the DC112d DC112 menu ee CCC er ll dE Or 30 00 fil When the previous screen appears select the parameter you want to configure Lc t or T using the and keys then press ok Use the key to cancel To modify the L parameter proceed as follows e Select the numerical value using and keys and press ok To modify the t parameter proceed as follows e Set the hours value using and and press to confirm repeat this process to set the minutes value The projection time t is set from HH mm 00 o 0 to 99 for HH Hours 0 to 59 for mm minutes The minimum projection time is 1 minute To modify the T parameter proceed as follows e Select the numerical value using and and confirm by pressing ok T integration time may be set from o 1 to 59 seconds 1 59 o 1 to 59 minutes 1 59 1 to 99 hours 1H 99 H e bre select the time units seconds minutes or hours H with the help of 73 and and press to confirm Use to cancel or return to the menu To set the frequency weighting applied to the spectrum access the menu of the DC112 and select SETTINGS gt MEASURING gt SPECTRUM ANALYSER we PEO TRUP BHPL SER PREG WE TGHT IMG L When the above screen appears select YES or NO using the A and keys depending on whether you wish to apply A frequency weighting or not and press ok 16 DC112d DC112 User s manual 2
12. highest absolute instantaneous sound pressure value since the beginning of the measurement in decibels 7 1 3 Equivalent daily exposure level L Exh Equivalent daily noise exposure level normalized to 8 hours with A frequency weighting Lex gn Lar 101g t T Lat Equivalent continuous sound pressure level with A frequency weighting corresponding to the measurement time t Measurement time To Normalization time 8 Hours 35 Sound exposure E 7 1 4 Dose DOSE Sound exposure time integral of the instantaneous squared sound pressure with A frecuency weighting over a specified measurement time expressed in Pa h t E foa 0 pat Instantaneous sound pressure with A frequency weighting Relationship between the energy of the measurement interval and the maximum energy allowed with a criterion level L for 8 hours Expressed as a percentage NEN DOSE 1 0 100 L exp Daily noise exposure level Lc Criterion level 36 CESVA instruments si Villar 20 bajos 08041 BARCELONA ESPANA Tel 34 934 335 240 FAX 34 933 479 310 e mail info cesva com www cesva com CESVA mstruments s Reserves the right to modify the characteristics and accessories of this manual without prior notice
13. in which the registers have been recorded For more information see section 3 4 e MEMORY This option facilitates the management of the DC112d DC112 memory MEMORY gt VIEW REGISTER Shows the registers recorded in the dosimeter For more information see section du MEMORY gt ERASE MEMORY This option erases the memory of the DC112d DC112 completely All the registers stored in the memory results and recordings will be deleted For more information see section 3 4 21 2 5 4 Settings e SETTINGS This option enables you to set a number of features of the DC112d DC112 eg Time date adjustments language or sensitivity of the DC112d DC112 SETTINGS 2 MEASURING With this option the acoustic parameters for the evaluation of noise at work level of criterion Lc projection time t and integration time T are defined see 2 3 1 SETTINGS gt MEASURING only DC112 e DOSIMETER With this option the acoustic parameters for the evaluation of noise at work are defined criterion level Lc projection time t and integration time T see 2 3 1 e SPECTRUM ANALYSER Allows to select the frequency weighting A or without which will be used for the spectrum analyser see 2 3 1 SETTINGS gt SENSITIVITY ADJUST This option enables you to adjust the sensitivity of the DC112d DC112 For more information see section 2 2 3 Testing the DC112d DC112 SETTINGS gt LANGUAGE Allows the language to be selected in which all the messages and
14. languages e The DC112d DC112 includes the Capture Studio software with which it can be programmed and measurements can be downloaded The software enables you to work with data in electronic format export it to other programmes and display it in numerical and graphic format in order to create your own reports e The DC112d DC112 microphone incorporates a clip to attach it to the worker s lapel so that they can carry out their working activities naturally e The DC112d DC112 is a personal pocket sized instrument Its reduced weight and robustness make it the ideal instrument for the evaluation of noise at work for those workers whose work requires them to move about the workplace 4 DC112d DC112 User s manual 1 3 Functions The DC112d DC112 measures the following functions simultaneously in all the dynamic range one single scale Equivalent continuous sound pressure level with A and C frequency weighting corresponding to the measurement time t Lat y Lc Peak sound pressure level with C frequency weighting corresponding to the measurement time t Lcpeak Equivalent continuous sound pressure level with or without A frequency weighting corresponding to measurement time t for each one of the octave bands centred on the frequencies 63 125 250 500 1000 2000 4000 y 8000 Hz Only DC112 Equivalent daily exposure level corresponding to the measurement time t Lex sn with frequency weighting A Sound exposure E
15. menus of the M DC112d DC112 are displayed Select the language with X and a SETTINGS gt TIME AND DATE This option allows the time and date of the DC112d DC112 to be adjusted SENSITIVITY ADJUST LANGUAGE DATE AMD TIME 2 6 Switching the DC112d DC112 off To switch off the DC112d DC112 check that no measurement is in progress Ml and E 3 22 DC112d DC112 User s manual 3 REGISTERING DATA The DC112d DC112 can record in the internal memory the values of the functions measured When the equipment is switched off the recorded data is not lost and can be retrieved and displayed directly from the DC112d DC112 or transmitted to a PC The memory can be erased directly from the DC112d DC112 Two kinds of registers may be saved in the memory e The final results of a measurement e Continuous recordings of functions with programmable integration time 3 1 Saving final results Once you have completed a measurement W the results may be stored in the memory by selecting the SAVE RESULTS option from the main menu The DC112d DC112 will indicate the register number in which to save the data The DC112d DC1 12 stores the following information e Equivalent continuous sound pressure level with A frequency weighting corresponding to the measurement time t Lai e Equivalent continuous sound pressure level with C frequency weighting corresponding to the measurement time t Lc e Equivalent continuous so
16. more than 0 3 dB from the calculated value the sensitivity of the dosimeter will need to be adjusted If not the dosimeter is measuring correctly and the sensitivity does not need adjusting If the testing procedure is not satisfactory contact an official CGESWA service before adjusting it To adjust the sensitivity proceed as follows Press CD to end the measurement process Do not switch off the CB 5 calibrator and keep it in the calibration position Next press to access the menu of the DC112d DC112 Access the option SETTINGS 3 SENSITIVITY ADJUST The sound pressure level measured by the DC112d DC112 will appear on the screen along with the time and date of the last time the sensitivity was modified 14 DC112d DC112 User s manual SENSITIVITY ADJUST qq 2005 03 15 1 15 39 i gt 6 Use the A and LA keys to adjust the value calculated 94 dB corrections OK 7 Confirm with the key the sensitivity will be modified and the time and date will be updated If you do not want update the sensitivity then press 7 to return to the DC112d DC112 menu SENSITIVITY ADJUST _ 7 94 9 dB 2007 03 15 1 35 39 RECOMMENDATIONS The CB 5 calibrator has two sound levels We recommend that you use the 94 dB level to test the DC112d DC112 using the 104 dB level to test its linearity When the test is finished switch off the calibrator 2 3 Measuring with the DC1120
17. the end of the plug by the cable as it will not disconnect Similarly do not try to disconnect it by twisting the plug In both cases the device could be damaged 2 1 4 Fixing the DC112d DC1 12 on the user worker The DC112d DC112 has a support clip 13 to fix it to the user s belt see figure and an adjustable metal clip 2 to attach the microphone to their collar or helmet Any excess wire should be wound in a figure 8 E Im 2 2 Beginning a measurement 2 2 1 Switching on the DC112d DC112 To switch on the DC112d DC1 12 press A screen will appear showing the GESWVA logo along with the DC112d DC112 model After a few seconds the numerical screen of the DC112d DC112 will appear see 2 2 2 If the DC112d DC112 fails to come on check that it is correctly connected to a power source 2 2 2 Display screen selection Once the dosimeter has been switched on it shows the numerical screen SCREEN To change from one measurement screen to another simply press and the new screen will appear 12 DC112d DC112 User s manual The following are the screens of the DC112d DC112 NUMERICAL SCREEN NUMERICAL SCREEN PROJECTED PARAMETERS 1 1 SPECTRUM ANALYSER SCREEN Only DC112 TIME HISTORY SCREEN PROJECTION A gt L CREE Numerical screen Numerical screen SCREEN E projected parameters OK SCREEN OK 1 1 Spectrum analyser screen only DC112 SCREEN
18. DC112d DC112 Dosimeter Dosimeter Spectrum Analyser User s Manual M DC112dDC112 v0020 20080128 ENG DC112d DC112 User s manual ENGLISH LGENERAL DES CRP LONE SEEDEDE EDER 3 1 1 Activation of the frequency analysis in octaves module for the DC112d 4 1 2 Main Characteristics of the DC112d DC112 0 0 cece ccccsececeeeeeeeeceeeseeeeseeeeaaeeseeeeaes 4 TE FONCIONS eec c 5 1 4 Description of the DC112d DC112 cece cccc cece eeeeeeeeeeeteeeteeeteeesseeeueeeueeseeeeeeeeeteeees 6 BES CN SI ease cape ETT 8 16 Use ofthe KEY DAG erresen E E Aae 8 2 USING THE DC112d DC112 mnie 10 Z2 Ml elis SS 0 E 10 2 1 1 Material and documentation susce aue os ocee ptas ep atu demde omen ecu tme ea ope Trpo Eu Ie te DIM EE IER Ro EpodS ee 10 2 1 2 DCT1120 DC112 Power SOUNCE ouscd ceat quodis bccondia EEN mt cump EE 10 2 1 3 Connection and disconnection of the microphone esseeeseeseeese 11 2 1 4 Fixing the DC112d DC112 on the user worker eeseeeeeeeeeereeeeee 12 2 2 Beginning a measurement cccccecceccceeceeeceeecaecceecceeecaeccaeceaesageceeceecaeesseesseeeeeeaaes 12 2 2 1 ewitehing on the DC112d DG 112 cuocere ritratto Roda diei ed oc tu ceti ai erbe natis 12 2 2 2 Display screen selection ccccceccseeceeeceeecaecceeccececeeceeeceeesaseceeseee
19. OK YS Time history screen 2 2 3 Testing the DC112d DC112 We recommend that you test the DC112d DC112 before beginning a measurement adjust the sensitivity if necessary and test it again after the measurement has finished To test the DC112d DC112 use the CESWVA CB 5 sound calibrator and proceed as follows 1 Insert the microphone of the DC112d DC112 in the cavity of the calibrator Make sure it has been fully inserted and is parallel to the axis of the calibrator see figure This may require a little force as the microphone must fit into the calibrator perfectly Do not insert the DC112d DC112 microphone roughly as it may be damaged 13 2 3 Switch on the calibrator and check the battery status The indicator must be lit at all times during the calibration process The calibrator generates a tone of 94 dB at 1 KHz Apply the pressure to free field corrections to the microphone at 1 kHz and the corresponding ones to the influence of atmospheric pressure temperature and humidity in the calibrator The free field pressure correction of the CESWA P007 microphone is 0 1 dB That means the DC112d DC112 should indicate a level of 93 9 dB SCREEN owitch the DC112d DC112 to the numerical screen 2 2 2 by pressing Start the measurement Check that the value of the Ly function coincides with the value of 94 0 dB with the corresponding corrections 93 9 dB Should the value of the reading differ by
20. The DC112d DC112 has an internal clock powered by a 3 V CR2032 type lithium button battery which enables it to save the time and programme This lithium battery has an average lifespan of 10 years When it runs out the internal calendar clock returns to 00 00 on the 01 01 2000 Go to the menu of the DC112d DC112 to consult the calendar The battery must be replaced immediately Remove it from the slot which is accessed from the battery compartment see photo and replace it with a new one or contact your official CESVWVA technical service This equipment can only be used with the accessories specified in the Accessories section If any unauthorised accessories are used and this results in a failure of the equipment CESVA will not accept responsibility for this failure and the equipment will be out of warranty 2 6 TECHNICAL SPECIFICATIONS 6 1 Measurement range Measurement range CONCCHE T NNN NN t 00000000 1999 5 59 HHHH MM SS 1 4 A a l l w w ha wo 0 d ha 0 ts dB Dos of 9999 lam oo 999 d Total Maximum Noise at 20 C Frequency Weighting Total Maximum Noise o Aa 43 de Se 2 53 dB Margin of frequencies maintained when the frequency response 31 5 Hz a 12 5 Khz extends to frequencies below 63 Hz or above 8 kHz 6 2 Peak detector L eak function Onset time constant 6 3 Frequency weightin C DC112d DC112 User s manual
21. bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz Only DC112 e Overall peak sound pressure level with C frequency weighting corresponding to the measurement time Lcepeax e Equivalent daily noise exposure level Lex gh p Equivalent continuous sound pressure level with A frequency weighting corresponding to the last integration interval T Lar e Equivalent continuous sound pressure level with C frequency weighting corresponding to the last integration interval T Lcr e Equivalent continuous sound pressure level corresponding to the last integration interval T with or without A frequency weighting for each one of the octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz Only DC112 e Peak sound pressure level of the integration interval with C frequency weighting Lcpeax e Measurement time t integration time T and the integration time elapsed e Date and time of the beginning of the measurement DOSE DOSE Lex sh p E and E functions are not saved Every time a register is displayed via the MEMORY gt SEE REGISTER option these functions are calculated according to the Lc and tp The storage capacity according to the programmable integration time is shown in the following table Storage capacity 1 month 3 days 11 months 7 days The storage times for each type of recording correspond to one single recording until the memory is completely full
22. cation will enable you to download measurements made with the instrument via the USB port and analyse the results quickly and simply The DC112d DC112 does not only make the job of measuring and evaluating noise simpler it also brings you all the data needed to inform and train workers with regard to the significance and potential risks arising from the results of the measurement and assessment Moreover It helps you to design and run a noise reduction programme and to choose the most suitable hearing protectors 3 1 1 Activation of the frequency analysis in octaves module for the DC112d To activate the frequency analysis in octaves module for the DC112d EF 112 e Insert el CD the you have received into the CD ROM unit The EF112 module Activator activation programme will run automatically If this does not happen run the SETUP EXE file of the CD ROM unit e Follow the steps indicated 1 2 Main Characteristics of the DC 112d DC112 e The DC112 carries out a frequency analysis in octave bands 63 Hz to 8 kHz to determine exposure to noise taking into account the reduction attained by the individual hearing protectors used by the workers e The projection of parameters makes it possible to evaluate the exposure to noise for measurement times less than the exposure time e The large memory 64 MB of the DC112d DC112 enables you to save the time history of all the functions measured for long periods of time The capacity
23. ht With battery 361 g Without battery 320 g 6 17 Calibration Use the CB 5 calibrator and consult section 2 2 3 6 18 Standards Standards UNE EN 61252 1998 A1 2003 UNE EN 61260 1997 A1 2002 EN 61252 1995 A1 2001 EN 61260 1995 A1 2001 IEC 61252 2002 IEC 61260 1995 A1 2001 DIRECTIVE 2003 10 CE OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 6 February 2003 on the minimum requirements for the health and safety related to the exposure of workers to risks derived from physical agents noise C mark Complies with 73 23 CEE and CEM 89 336 CEE low tension regulations the latter amended by 93 68 CEE CESVA unstruments s as manufacturer of electric or electronic equipment gives notice that the product you have purchased was put on the market later than 13 August 2005 and complies with 2002 96 CE and 2003 108 CE directives on Waste from Electrical and Electronic Equipment WEEE In addition the product is marked with the following symbol which indicates that it is subject to separate collection 33 6 19 Notes Should your DC112d DC112 cease to comply with any of these specifications contact your nearest official G ESsWAX service technicians who will gladly check adjust and or repair it for you It is obligatory to send the DC112d DC112 to an authorised laboratory annually to test its acoustic and electric characteristics are working correctly periodic testing 6 20 Accessories Standard accessories
24. ing out a measurement the following information is shown in the bottom right hand corner of the screen e Measurement time lapsed t e Battery status indicator e Measurement status indicator o Mi measurement finished t 00 01 17 o gt measurement in progress E o flashing measurement with recording in progress o Il measurement paused 1 6 Use of the keypad GENERIC KEYS On Off key of the DC112d DC112 On Off key of the screen light MENU KEYS Ce Keyt retum to o previous menu or carcel 8 DC112d DC112 User s manual MEASUREMENT KEYS Key to begin or end a measurement Key to continue a measurement when the DC112d DC112 is on Il Key to interrupt PAUSE a measurement while the DC112d DC112 is on gt or 8 Or to begin a recording in the memory when the DC112d DC112 is on W Key to return to the previous octave band Key to move on to the next octave band or to move on to the numerical screen with projected parameters SCREEN Key to select the desired Dosimeter mode screen OK numerical screen 1 1 spectrum analyser screen or graphic screen Key to block the keypad To unblock it press this same key OK 9 2 USING THE DC1120 DC112 2 1 Initial steps This chapter contains all the information necessary to configure adjust and carry out measurements with the DC112d DC112 dosimeter 2 1 1 Material and documentation The first step is to check the material and docu
25. is 1 month saving functions every second irrespective of the number of measurements being saved e The DC112d DC112 has a USB port to download data to a PC at high speed While the DC112d DC112 is connected to the USB port of a PC it does not need batteries as it is powered by the USB port of the PC e The keypad of the DC112d DC112 can be blocked to avoid accidental interventions While the keypad is blocked the values of the functions measured do not appear on the screen to avoid the deliberate generation of noise to distort the measurements e The DC112d DC112 adapts to any work shift As it allows you to stop a recording in progress pause switch off the instrument switch it back on again later and restart the measurement recording making all the information available in just one measurement Ideal for measuring split shifts and evaluating weekly levels e The graphic screen is very practical for the evaluation of a noise event its time history spectral content or its variability e The DC112d DC112 has a register of the date of the last sensitivity adjustment carried out in this way any unauthorised manipulation is registered e The battery status indicator that appears on the screen of the DC112d DC112 shows the current state of the battery at all times e The DC112d DC112 screen lights up at the touch of a button meaning that work can be carried out in atmospheres of poor lighting e The DC112d DC112 supports multiple
26. manual 6 7 Reference conditions Reference direction Perpendicular to the microphone diaphragm Reference sound pressure level 94 dB ref a 20 uPa Reference integration time 1 hour Reference sound exposure 1 0 Path 6 8 Electrical signal insertion Can be carried out with a Coaxial LEMO 5 connector situated at the top of the DC112d DC112 The ADMOPOO7 adapter must be used The devices connected must have an electrical impedance of less than 100 O 6 9 Single pole pulse response Typical E deviation with positive and negative pulses 6 10 Warm up time Warm up time 30 seconds 6 11 Influence of temperature Operation range Oat40 C Storage without batteries 20a 60 C 31 6 12 Influence of humidity Operation range 30 to 90 Storage without batteries lt 93 6 13 Influence of atmospheric pressure Operation range 91 2a 111 4 kPa 6 14 Electromagnetic compatibility Configuration for the normal operation Numerical screen in dosimeter mode mode and with Lc 87dB Influence of Magnetic Fields In a magnetic field of 80 A m 1 oersted at 50 Hz the reading will be under 52 dB A With the instrument positioned perpendicular to the magnetic field propagation direction and the microphone cable extended around the instrument In addition the USB communication cable without connector will be connected Lat oound pressure level at which the DC112d DC112 meets the require
27. mentation provided with the DC112d DC112 Material included e DC112d DC112 dosimeter spectrum analyser e Case e One 6LF22 type 9 V alkaline battery e Connection cable for communication with the PC e CESWVA Capture Studio Software Documentation included e Users manual for the DC112d DC112 dosimeter spectrum analyser e Guarantee If any of these elements should be missing contact your official G E SWA distributor 2 1 2 DC112d DC112 Power source The first operation to carry out before switching on the DC112d DC112 is to supply power The DC112d DC112 dosimeter is powered by a 6LF22 type 9V alkaline battery or via the USB port 8 To fit the battery remove the battery protection cover 15 which can be found at the back of the DC112d DC112 Insert the battery and press until the contacts fit perfectly see figure The battery indicator symbol in the bottom right hand corner of the dosimeter screen shows the status of the battery see figure When the battery is fully charged the Eii symbol shows on the screen As the battery is discharged the symbol empties When the battery is not sufficiently charged for the LES Bh BEY ak DC112d DC112 to work correctly the FH symbol will BOSE Meg Pazi start to flash Then if there is a measurement or um recording in progress it will be paused and the ile 91 0 dE message BATTERY FLAT will appear on the screen gt SGQur ib 00 00 00 and the device will switch off
28. ments of a radiated electromagnetic field Set of accessories tested in the P007 Microphone and USB connection verification of the electromagnetic cable CN1US compatibility requirements Configuration for the reference DC112d DC112 perpendicular to the orientation ground and the microphone following the main axis of the dosimeter with 50cm of cable extended and any excess cable wound in a figure 8 No emission difference is observed from the normal operation mode with the equipment in a vertical position with the microphone cable fully extended perpendicular to the main axis of the DC112d DC112 with all cables connected and with the USB feeder The equipment shows no degradation or loss of function after being exposed to electrostatic discharges The DC112d DC112 shows a slight variation with respect to the electric field with the instrument perpendicular to the propagation direction and the cables extended perpendicular to the main axis of the instrument The application of sinusoidal vibrations of 1 m s between 20 Hz and 1000 Hz does not limit the operation of the instrument 32 DC112d DC112 User s manual 6 15 Batteries and external supply Battery One 6LF22 type 9 volt battery Typical battery life with continuous use 20 hours The typical battery life with the display lit may be reduced by up to 50 with respect to the previous value External Supply By USB port 6 16 Dimensions and weight Weig
29. n the memory Before beginning a recording make sure there is no measurement in progress W n e HESR To begin a recording press The screen will display the register number The functions selected for the type of recording will be saved periodically in the memory until you stop the recording by pressing i 23 During the recording process the recording icon will appear on the screen The DC112d DC112 saves the following values once each integration period T has finished e Equivalent continuous sound pressure level with A frequency weighting Lar e Equivalent continuous sound pressure level with C frequency weighting Ler e Equivalent sound pressure level corresponding to the last T integration interval with or without frequency weighting A for each one of the octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz Only DC112 e Peak sound pressure level of the T integration interval with C frequency weighting Lcpeak 7 When the measurement ends the final results are saved e Equivalent continuous sound pressure level with A frequency weighting corresponding to the measurement time Lai e Equivalent continuous sound pressure level with C frequency weighting corresponding to the measurement time Lei e Equivalent continuous sound pressure level with the integration time corresponding to the measurement time with or without A frequency weighting for each one of the octave
30. neously the equivalent level with A and C frequency weightings Lat Lc daily noise exposure level with frequency weighting A Lexen ISO 1999 Noise exposure in Pa h E and noise dose DOSE with respect to a programmable Criterion Level Lc and of course also the Peak Level with C frequency weighting Lcpeak ISO 1999 Moreover the DC112d DC112 allows you to carry out the measurement during a time shorter than the exposure time because it shows on the screen all parameters projected to the expected exposure time programmable projection time tp To evaluate the exposure to noise taking into account the attenuation of the individual hearing protectors worn by the worker the DC112 besides measuring the equivalent level with A and C frequency weightings Lat Lc SNR and HML method like the DC1124d simultaneously carries out a real time frequency analysis by octave bands from 63 Hz to 8 kHz Octave method with or without frequency weighting In line with the philosophy that characterises CESWA instruments the DC112d DC112 is a user friendly instrument with a single range no changes of scale and simultaneous measurement of all its parameters The large memory of the DC112d DC112 allows you to store the time history of the parameters measured time periods longer than a week and afterwards recalculate them for any time interval required The DC112d DC112 comes with the Capture Studio software This appli
31. ons that are accessible from the DC112d DC112 menu among them memory management setting the measurement parameters setting the language the time and date and only in the DC112 selection of frequency weighting for the spectrum analyser The DC112d DC112 comes with an initial configuration which makes it possible to carry out measurements without having to reset it in advance 2 5 1 Menu access To access the DC112d DC112 menu make sure that no measurement is in progress W and press The following screen will appear 20 DC112d DC112 User s manual SAVE RESULTS MEMORY SETTINGS 2005 04 19 2 56 52 MEML This menu shows the main settings screen along with the time and date of the DC112d DC112 s clock The memory status is also shown indicating the available memory remaining e Memory empty gt MeEMC gt MEM m e Memory full 2 5 2 Menu of the DC112d DC112 The memory of the DC112d DC112 has the following structure SAVE RESULTS i MEMORY ERASE MEMORY SETTINGS 2005 04 19 2 56 52 nen c E DOSIMETER SENSITIVITY ADJUST SPECTRUM ANALYSER LANGUAGE DATE HHD TIME only DC112 To move through the settings menu use the keys described in section 1 6 2 5 3 Register management e SAVING RESULTS When this option is selected the DC112d DC112 records in its memory the final results of all the functions measured The DC112d DC112 indicates the number of the register
32. pear on pause II e Press rin to continue the measurement The DC112d DC112 will continue saving the values measured in the same register 3 3 Viewing the register This option allows you to display on screen the final result of the registers stored in the DC112d DC112 memory Access the option by selecting MEMORY gt VIEW REGISTER from the DC112d DC112 menu By pressing x and ok the DC112d DC112 allows you to select the register you want to view The screen will display an index of all the registers stored in the memory register number date and time when the measurement process began To view the different functions follow the procedure described in section 2 3 3 3 4 Erasing the memory This option enables you to wipe the memory completely The DC112d DC112 asks for confirmation before erasing MEMORY gt ERASE MEMORY 25 4 DATA TRANSFER The DC112d DC112 has the following data outputs see figure e USB communications port bidirectional digital USB 1 1 full soeed port for communication with a personal computer p The USB communication port allows real time transmission of the functions measured and those saved in the memory of a computer with a high transfer speed 4 1 Transfer of data to a PC Communication software The communication software supplied with the DC112d DC112 CESWA Capture Studio allows the following operations to be carried out e Real time transmission of the data meas
33. q DC112 The DC112d DC112 measures the following parameters for the evaluation of noise at work equivalent daily exposure level Lexg n sound exposure E and noise dose DOSE In addition the DC112d DC112 facilitates the projection of these parameters to the expected exposure time t for measurements shorter than the exposure time It also measures the equivalent continuous sound pressure level with A and C frequency weightings La y Lc and the peak level with C weighting Lcpeax Only the DC112 carries out a frequency analysis measuring in real time the equivalent continuous sound pressure levels for the octave bands between 63 Hz and 8 kHz with A frequency weighting The time history analysis shows the evolution of the equivalent continuous sound pressure level with and without A frequency weighting for the programmable continuous integration time T 2 3 1 Prior adjustments Before beginning a measurement the following parameters should be set e Criterion level Lc constant exposure to this level for eight hours would result in a 100 noise DOSE e Projection time t predicted noise exposure time e Integration time T Integration time for the measurement of equivalent continuous sound pressure level The DC112d DC112 saves the time history for the parameters Lcpeak Lar Ler and Lroa e The frequency weighting applied to the spectrum measured 15 To set these parameters select the SETTINGS gt MEASURING
34. red remains constant during the projection time The projected parameters allow the evaluation of the sound exposure for measurement times shorter than the set projection time tp e Projected daily noise exposure level Lex sn p with frequency weighting A e Projected sound exposure E e Projected noise dose DOSE e Measurement time t and projected time tp To return to the previous screen press x When a register recovered from the memory is displayed on the screen the sound level meter uses the Lc criterion level and the t projection time set This feature allows evaluations for a register according to the criterion level Lc and the projection time t set on the sound level meter 1 1 Spectrum analyser screen only DC112 This screen shows in real time the following information E 25 afg illi e Graph of the equivalent continuous sound pressure level with the integration time corresponding to the measurement time _ bars in real time for the octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz with A frequency weighting e Numerical value of the equivalent continuous sound pressure level with the integration time equal to the measurement time for the selected octave band amp bar with A frequency weighting e Central frequency of the selected octave band GE bar e Overall equivalent continuous sound pressure level with the integration time corresponding to the meas
35. saeesseesseenensaeees 12 220 VesumO tne DCTI2d DOT T2 E 13 2 3 Measuring with the DC112d DCO112 ce eee ccccceeeeseeeseeeeceeeseeeeaaeeseeeeeeeeseeeseeesaeees 15 2 941 Prior AQIUSUMISIMS spisnscisdemaniensaionvnecencrcecaadtededoebcac sousdesaxdelensincevunewesaieesdedendewecandendnttewte sani 15 2 3 2 BEGINNING a MEASULEMENM ccccsccceecceeeceecceeecuecauecasecauecageceeeseeecueecueesuesaensaeees 17 2 9 9 VIICUOM GIS NAY osa ERNE SERENE E E T 17 2 9 BIOCKING NE KeyPad cessan a ia aE 19 2 3 5 Interrupting the measurement sessesssssssssssssseeneen nennen nnne nnns 19 29 0 suelto Eizo 20 2 3 7 Consulting measured data cadens d tune Pa Ux aU Come a suate ee n ovess evene atas du x VR AREE uds 20 2 4 Overload indicator seesseesssesssesssessseeseeee nennen nennen nnn nnne anne sna nn 20 2 5 Menu of the DC112d DC112 Register management and settings 20 2 9 1 WOT HC COS a peg pststemat esi E Detiueste n dci cacbed s musicus usu bases MEET AU NNUS 20 2 52 Men ofthe DC T120 DC T12 aan sarum uma E ETS 21 2 5 3 Register management ccccccecccececeeeceeecueceueecuecaeesaeeceeceeceeceeeceeseerseeeseesaeess 21 ZS IN a E Em 22 2 6 Switching the DC112d DC 112 OT nisse operar trai et uta md ide ERI P OR Dave Eu uH osa Ea memes anas 22 3 REGISTERING DATA ansknbenb isiauivdaiasibrepi vli ha ERROR REN EE rp otio F bi 23 9 T Sa
36. und pressure level with the integration time corresponding to the measurement time t with or without A frequency weighting for each one of the octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz Only DC112 e Overall peak sound pressure level with C frequency weighting corresponding to the measurement time t L cosa e Equivalent daily noise exposure level Lex sn e Equivalent continuous sound pressure level with A frequency weighting corresponding to the last integration interval T Lar e Equivalent continuous sound pressure level with C frequency weighting corresponding to the last integration interval T Lcr e Equivalent continuous sound pressure level corresponding to the last integration interval T with or without A frequency weighting for each one of the octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz Only DC112 e Peak sound pressure level of the integration interval T with C frequency weighting e Measurement time t integration time T and the integration time elapsed e Date and time of the beginning of the measurement DOSE DOSE Lexar p E and E functions are not saved Every time a register is displayed with the MEMORY SEE REGISTER option these functions are calculated according to the Lc and t values 3 2 Making a recording A recording consists of making a measurement and storing the parameters measured by the DC112d DC112 i
37. ured by the DC112d DC112 to a computer e Downloading the registers saved by the DC112d DC112 e Register management erasing etc e Programming the dosimeter time parameters etc To carry out these functions the DC112d DC112 must be connected to the USB port of a computer with the cable supplied For more information about GE SVWA Capture Studio use the help that it incorporates 26 DC112d DC112 User s manual 5 PRECAUTIONS AND WARNINGS e Keep the microphone away from dust and sharp objects e Avoid excessive humidity and sudden changes of temperature which may produce condensation on the microphone e The microphone must never be dismantled as this may cause permanent damage e Any knocks on the DC112d DC112 will be picked up by the microphone and this may affect the value of the measurement e We recommend that you test the DC112d DC112 before and after every measurement using the sound calibrator See section 2 2 3 If the testing procedure is not satisfactory contact an official CE SVWA service before adjusting it e Remove the batteries if the DC112d DC112 will not be used for an extended period of time e The GESWVA DC112d DC112 dosimeter is designed to be very reliable for a long time If any malfunction cannot be resolved by changing the battery or consulting the manual send the DC112d DC112 to an official CE SWA service Under no circumstances allow it to be repaired by unauthorised personnel e
38. urement time and with A frequency weighting e Measurement time t Time history screen This screen shows in real time the following information 18 DC112d DC112 User s manual e Time history 60 values of the equivalent continuous sound pressure level with integration time T and A frequency weighting e Numerical value of the equivalent continuous sound pressure level with integration time T and A frequency weighting e Measurement time t and integration time elapsed 2 3 4 Blocking the keypad While a measurement or recording is in progress the keypad of the DC112d DC112 can be blocked this way accidental interventions in the process can be avoided o To block the keypad press The message KEYPAD BLOCKED will appear on the screen Next the information of the functions measured will disappear from the screen leaving just e The measurement time t elapsed e The battery status indicator e he measurement status indicator e The O symbol in the top right hand corner of the screen indicating that the keypad is blocked While the keypad is blocked the values of the functions measured do not appear on the screen to avoid the deliberate generation of noise to distort the measurement a To unblock the keypad press followed by m 2 3 5 Interrupting the measurement n e By pressing you temporarily interrupt the measurement The measurement status indicator will change from P to I
39. vihig TMA TeSUllS cenctssusutestetun tuv terc eoela e us duntal se saisis dqa UN UE du Erani 23 SEN MAKING aA Fear TIN NE EE Tom 23 3 2 1 Continuing a recording after the DC112d DC112 has been switched off 25 3 3 VIEWING ING d eo c MERE 25 3 4 Erasing the memory ccccsccscccscecececseeceeceeeceeeceeesaeesaeesaeesaeesaeseeesgecaeecseesseesensaueeaaes 25 DATA TRANSFER eal ripen EDER ERE HO EE ERE 26 4 1 Transfer of data to a PC Communication software ccccccccecceeeeceeeeeeeeeaeeseeeeeeees 26 5 PRECAUTIONS AND WARNINGS uessckibkizxixen inndKE dpa dnb eK LER EU AR EUR acd ncn 27 6 TECHNICAL SPECIFICATIONS iss vavaikkxu a nDGUUYAEEKV REFER ERU VET YA KEAE DURER ER RR OR RU GERD ERROR 28 6 1 Measurement range ssssessssssessseeseee see nenne nnne nnne nnne rne saei sae sais aes r sean se sene ns 28 6 2 Peak detector Lpeak function oorr rre rine nc reete eren nu aime aenea nua rinm es 28 6 3 Frequency WEIGNKING ccccccceccceccesccceecceeceeecaeeceeeceeccuecsauecaeeeaecauesauecaeesaeeceeesseseueeaaes 20 6 4 Sound pressure level range according to freQUeNCY cccecccseeceeeeeeeeeeeeeceeeeeeeseeees 29 6 5 Octave band TOES xoc mme EEN Satira eE a E EEEE 30 GO VINOD OMS RERO E MMT 30 6 7 Reference CO ONS RETE T UU T 31 6 8 Electrical signal WISGIMON 22 imet e eet atat abes tctentiuttuuua ai LE dob ut distet gba eiae 31 6 9 Single pole pulse response
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