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III – Presentation of the sound level meter

1. 12 078 4 x 5 Hz dB 080 S S 070 050 030 010 ACZ 63 250 1k 4k 16K 00 00 00 24 DI El Analyser with storage function by octave bands 31 5Hz _ 8KHz Cal CALIBRATION Ref 94 0 dB C C 0 0 dB LCF ea dB Corr 0 5 dB 05 10 2011 Calibration 00 00 00 30 ow Da Measurement of sound of installation NR curves L A AF 55 2 LAeq 98 7 4 oe 31 4 A 00 00 00 Cont 4 Retro 3 Set contrast and backlight IV Setting From the Ell a screen lists the different settings or information about the instrument To have access to one of those screens scroll with the scrolling knob key and validate with OK key To quit each screen and back to main menu use fay key 1 0 1 02 DC 0 10V CONFIGURATION Out O CONFIGURATION CONFIG ot E n PROG MESURE Langue COMMENTAIRE A t L LeqA A PROPOS 1 0 p _ gt p 100 dB LECTURE NF EN 61672 PC y NF EN 61804 NF EN 61651 AUTONOMIE CEI 61260 faa fle INSTRUMENT APROPOS Fabriqu en France Men u V rifi le 01 2012 Av rifierle 01 2013 IV 1 Configuration This screen allows configuration for some functions To have access to those functions Press key then choose CONFIGURATION with the scrolling knob key and OK key to validate CONFIGURATION CONFIGURATION O CONFIGURATION Langue Fran ais PROG MESURE Bip Oui COMMENTAIRE A f O LE
2. Vill Transfer files to a PC VIII 1 Transfer This function allows to transfer data towards a computer through a USB cable The operating software must be installed on the computer e Connect the instrument to the PC through the USB cable e Go to PC screen of the sound level meter from the menu icon select PC then press OK e Press OK key again to activate USB icon The connection to the PC is shown on the screen of the sound level meter PC PC PC CONFIGURATION PROG MESURE DE 15 01 2011 Date 15 01 2011 COMMENTAIRE 10 20 55 10 20 55 ES OK OK LECTURE DB300 PC DB300 PC 0 PC AUTONOMIE INSTRUMENT APROPOS 07 USB RAZ USB 111 y Menu PC screen Sound level meter PC connection After the transfer turn off the instrument or quit PC screen by pressing Esc key The instrument is considered by the computer as a removable disk Files transfer can be perform according to two ways e With the LDB23 software see user manual of the software e Directly by activating the files manager of the operating system of the PC for example copy paste function send to to move files of the removable disk DB300 to the repertory the directory for the classification of the measurements 40 VIII 2 Files format and structure on the micro SD card Files have a generic termination Example S005_2409 L23 With 005 order number 2409 day month L23 extension Audio files are in a same directory which have the name of t
3. 2 4003 44 AY l2Ko Son Wave Memory space Available memory on micro SD card is divided into 2 areas the 1 one contains the metrological files and the 2 one contains audio files for re listening Before starting a new measurement it is advisable to check the remaining measurement capacity expressed in number of event timers and battery capacity For that from MENU screen AUTONOMIE AUTONOMIE e Select AUTONOMIE BP TOS E e Press OK to validate Ds e Check the number of sessions and the remaining battery life a Ex 870 sessions and 80 of remaining battery life in JJ HH MMSS one an ae 00 21 36 00 In case of shortage all data in the micro SD card must be deleted U R e With the keypad see page 41 H e With a software A Only the person in charge of the measurement has the responsibility to process recordings 45 X 4 Measurement in progress Data reading Audio function generates an additional screen control which completes the screen chain during measurement or at the end for reading of results During measurement Audio appears in the different screens and during recording a blinking point replaces Audio Waiting for the recording LAeq T LCeq T H Au d j 0 1 L 00 00 00 28 Audio El Reading 12 078 4 5 Hz 080 070 050 030 010 ACZ 00 00 00 24 63 250 1k 4k 16K Audio DI El A dB Blinking point during recording During recording E a 125 Y 078
4. maximum peak level of sound pressure on the measurement duration ES T e Measurement duration in HH MM SS 00 00 05 E2 This screen contains results of values that will be stored in memory at the end of measurement e LUpk maximum peak level of sound pressure on the measurement duration e LXY Inst instantaneous values of sound pressure levels temporally weighted met since the beginning of the measurement e LXYmax maximum value of sound pressure level weighted temporally met since the beginning of the measurement e LXYmin minimum value of sound pressure level weighted temporally met since the beginning of the measurement 103 6 dB To see these different results S N e Move the cursor with arrows keys on the item 1 and select with the scrolling knob key E Inst Max min to read instantaneous maximum and minimum values of sound pressure levels G ER LXY E 8 7 a e4 A LCI 78 6 dB mo aP T LAF 92 4 amp LAF 44 3 a 1 LAS 91 2 4o LAS 45 6 a 101 9 0 Al 449 A ie 93 6 e ee 45 3 A le 928 E re 45 8 A A LCI 102 7 dB LCI 46 1 dB y RAZ Max E2 Y RAZ min E2 E3 this screen reminds the general format of the session of measurement e Start date of measurement start 15 05 13 15 45 D part 15 05 09 15 e End date of measurement end here not entered because measurement is still ongoing Fin e Duration measurement duration here on going Dur e 00 00 01 13 e Mode measurement mode here L Leq
5. specify an acoustic situation indicating simultaneously e The instantaneous maximum or minimum sound pressure levels LXY e The equivalent continuous levels LAeq and LCeq e The maximum peak pressure level Lepk e Measurement duration 00 00 05 Main data are stored at the end of the measurement in order to get a usable file by the software supplied with the instrument To start this mode e Press rln key LAeq and LCeq values are indicated the timer indicates the measurement duration instead of time Note RST function is not available anymore in this mode During measurement s tis possible to watch E1 or E2 screen with the scrolling knob key also for conventional mode 4 AD gt LpK LpK LpK LAF LAS LAI LCF LCS LCI 103 6 88 7 61 4 78 6 88 7 61 4 78 6 Inst 44 3 45 6 44 9 45 3 45 8 46 1 A 99 2 92 98 7 A dB 31 4 A dB 00 00 05 15 V1 5 Screens during measurements During measurement three screens inform the current measurement They are accessible through the scrolling knob key L L A E1 itis the main screen that displays the instantaneous measurements o a e LXY sound pressure level temporally weighted according to the selection e LAeq equivalent continuous level of sound pressure A weighted on the measurement duration S S e LCeq equivalent continuous level of sound pressure C weighted on the measurement duration E 55 2 R e LUpk
6. 18 05 23 00 04 00 30 56 1 1 oct 31 5Hz 8kHz 1s C non S02_0410 L23 Stored file Vil 2 4 NR noise equipment file When the file has been identified by its identification number gt Press OK to go to E1 screen which remains the measurement configuration e Date of measurement start e Date of measurement end e Measurement duration e Measurement mode NR Mode e Filters by octave bands from 31 5Hz to 8kHz F e Elementary integration time for LXeq DI e Frequency weighting of the peak pressure level Lpk E2 is the main screen that displays the graphical representation spectrum type The different bars are for e LXeq equivalent continuous levels of sound pressure filtered by octave bands from 31 5Hz to 8 kHz e NR value in 1 is for the NR index as per NF S 31 010 standard e Measurement duration in JJ HH MM SS E3 this screen displays results values that are stored in the memory eL CpkMax maximum peak pressure level noted during the measurement eLAeq LCeq LZeq equivalent continuous levels of sound pressure A C and Z weighted on the measurement duration e LXeq equivalent continuous levels of sound pressure on the measurement duration filtered by octave bands from 31 5Hz to 8 kHz 15 05 D part Fin Dur e Mode F DI Lpk S09 13 15 45 15 05 09 15 18 05 23 00 04 00 30 NR 31 5Hz 8kHz T C S09_0410 L23 Stored file gt Press Esc ke
7. Fin Dur e Mode 1 1 oct F 31 5Hz 8kHz DI 1s Lpk C Audio non 13 15 45 STOP S11 1 1 oct is not completed Pressing B key e Accept measurements and store them move the cursor on Sto and press once on OK key to confirm A banner displays the storage phase 250 123 4 STOP 090 080 P S11 080 070 070 050 050 030 030 A CZ 63 250 1k 4k 16K 00 00 00 24 global E1 1 1 oct Raz 123 4 00 00 00 24 Ongoing measurement Results screen STO S11 L B 1 1 Oct Storage e Reject measurements and not store them move the cursor on RST and press twice on OK key to confirm A banner displays the phase of suppression of data A 123 4 T A 123 4 110 110 ue RAZ 090 090 080 080 Pp S 1 1 070 070 050 050 030 i 030 fi Se gro l E gg A CZ 63 250 1k 4k 16K 00 00 00 24 00 00 00 24 Results screen RST active SSS 1 1 Oct Deletion 23 V 4 Measurement of noise equipment NR mode 4 mo e Select NR mode move the cursor with the arrows on the icon then press OK The sound level meter works as a frequency analyzer to determinate the noise level compared to a network of evaluation curves called NR Noise Rating curves as per NF S 30 010 standard It processes the sound signal according to two temporal modes e Ona free T measurement duration left
8. Mode L Leg e Pond Frequency weightings ATS ES e Cte time constant DI s s Lpk c e S S Integration mode Start Stop e Lpk frequency weighting of the peak pressure level L Leq E3 16 V1 6 Stop the measurement STOP e Press LU key to stop the measurement S11 Validate with OK V 1 7 Store data At the end of the measurement a screen of all results is displayed It is then possible to e Accept measurements and store them move the cursor on Sto and press once on OK key to confirm A banner displays the storage phase LpK A 99 5 dB 98 7 dB 31 4 dB 67 4 dB 30 50 70 90 110 130 STOP R STO S11 02 S11 a OK L A 98 7 dB 552 a LAeq 98 7 A 78 5 dB E 314 X 67 4 dB 00 00 05 E1 Raz Ongoing measurement Results screen Storage e Reject measurements and not store them move the cursor on RST and press twice on OK key to confirm A banner displays the phase of suppression of data LCpk 99 5 dB LCpk 99 5 dB LAeq 98 7 dB LAeq 98 7 dB LCeq 31 4 dB LCeq 31 4 dB LAE 67 4 dB LAE 67 4 dB LCE 78 5 dB LCE 78 5 dB D 00 00 05 D 00 00 05 RAZ RAZ A 02 A 02 We Me OK S11 7 OK 11 LAF 99 5 dB LAF 99 5 dB LAS 98 7 dB LAS 98 7 dB LAI 31 4 dB LAI 31 4 dB LCF 67 4 dB LCF 67 4 dB LCS io ues ESNE gt Es LCI 67 4 dB LCI 67 4 dB Results screen RST active Deletion 17 V 2 Sound level meter and averager integrator with storage function e Select Leq St mode move the cursor wit
9. less than one bar on the pictogram the pictogram starts blinking the instrument stops the measurement saves the results and switches off During a mains connection for long term measurements the pictogram automatically changes to represent a plug Sba og avoid this trouble let the batteries or the rechargeable battery inside the instrument In case of sudden failure of the sector the measurement is not saved To 90 XII 3 Inputs outputs I O programming XII 3 1 1 0 1 In Adapted to launch a measurement from an external electronic order of 0 5 VDC maximum Compatible with the following measurement modes I Integrating averaging sound level meter with storage A and C weighted Integrating averaging sound level meter A and C weighted and analyser by octave bands filters from 31 5Hz to 8 kHz with storage Mb When the instrument is used in analyser mode for the measurement noise equipment in correspondence with NR curves as per NE S 30 010 standard e Measurement beginning in Tim mode works only for a programming of free duration T and does not work for preset durations 3 5 10 15 30 60 s Analyser sound level meter for the measurement according to the NR curves as per NF S 30 010 standard XII 3 2 1 0 1 Out It is the output detection in relation to a preset sound level and concerns the measurement modes below A high level appears in output when the value of sound pressure lev
10. s08 global E2 1 E2 global screen 250 Hz 123 4 q 110 090 EN T 0 l L A CZ 63 250 1k 4k 16K 0 00 o 0 N o 0 uu o 0 w o 0 00 04 00 30 S08 Max E2 E2 screen Max LA 250 Hz 123 4 4B 110 090 0 00 Oo 0 o o uw G 0 w Oo 0 Bp o ACZ 63 250 1k 4k 16K 00 04 00 30 S08 min E2 E2 screen min gt 4 gt lt gt lt LCpkmax 99 5 dB A LAeq 98 7 dB LCeq 81 4 dB LZeq 98 7 dB 16 HZ 31 5 Hz 98 7 dB 63 Hz 81 4 dB 125 Hz 99 5 dB 250 Hz 98 7 dB 500 Hz 61 4 dB 1kHz 99 5 dB 2 kHz 98 7 dB 4 kHz 61 4 dB 8 kHz 51 4 dB 16kHz 08 global E3 E3 global screen LCpkmax 99 5 dB A LAeq 98 7 dB LCeq 81 4 dB LZeq 98 7 dB 16Hz 31 5 Hz 98 7 dB 63 Hz 81 4 dB 125 Hz 99 5 dB 250 Hz 98 7 dB 500 Hz 61 4 dB 1 kHz 99 5 dB 2 kHz 98 7 dB 4 kHz 61 4 dB 8 kHz 51 4 dB 16kHz S08 Max E3 E3 screen Max LCpkmax 995 dB A LAeq 98 7 dB LCeq 81 4 dB LZeq 98 7 dB 16Hz _ 31 5 Hz 98 7 dB 63 Hz 81 4 dB 125 Hz 99 5 dB 250 Hz 98 7 dB 500 Hz 61 4 dB 1 kHz 99 5 dB 2 kHz 98 7 dB 4 kHz 61 4 dB 8 kHz 51 4 dB 16kHz S08 min E3 E3 screen min gt lt gt lt gt lt Y esc 15 05 D part Fin Dur e Mode DI Lpk Audio S08 13 15 45 15 05 09 15
11. 240V 60 50Hz 150 mA SEC 5V 1000mA 5VA 58 XIII 9 Memory and storage autonomy e Memory micro SD card Storage capacity can Logging time DI Maximum duration Maximum duration be divided into 999 sessions measurement in measurement in day e Minimum capacity micro SD Card 2GB hour The opposite table shows the measurement 1s 3240 135 duration 1 session according to the logging time DI for the storage in 1 1 oct mode AS 1620 67 810 33 1 8 s 405 16 1 16 s 200 8 For logging times greater than 1s the maximum measurement duration is related to the obtained result with 1 second EX DIl 15s Maximum measurement duration 135 days x 15 1 is erased A In the event of a reset of the memory by the sound level meter or through the software LDB23 all the memory XIII 10 Audio recording capacity The audio recording brings information to identify sources and the correspondence with the measured sound levels It is characterized by a frequency sampling and an accuracy expressed in number of bits The result is a certain recording capacity Sampling Pre and post Accuracy Recording capacity recording HH MM SS 12 kHz 4s 16 bits 00 45 00 XIII 11 Power and operating autonomy Measurement autonomies linked to power supply are given for an operating at 20 C and with the backlight off Beware of declining capacity of the battery or batteries for measurement
12. 4 dB 89 1 dB 110 78 7 y g oso E 7 81 4 080 9 070 5 050 76 7 030 83 9 010 ACZ 63 250 1k 4k 16K 00 00 00 28 00 00 00 24 El 0 DI E In the E1 screen which remains the measurement configuration Yes is indicated in front of Audio An additional screen indicates the number of recordings performed during the measurement 15 05 13 15 45 D part 15 05 09 15 Fin 18 05 10 30 Dur e 00 04 00 Mode Leq stock Pond A C DI 1s pk C S08 El 46 15 05 13 15 45 D part 15 05 09 15 Fin 18 05 23 00 Dur e 04 00 30 Mode 1 1 oct F 31 5Hz 8kHz DI 1s 08 El Audio Ref LAeq Seuil S i dB XI Direction for use and maintenance of the sound level meter XI 1 Use warnings The sound level meter is a measuring instrument using the latest technologies To maintain accuracy and required reliability avoid any chock of the housing and the microphone and keep them away from humidity and corrosive steams XI 2 Direction for use For each application you should check measurement technique and conditions in order to get valid and coherent results The way of using the instrument has at least as much importance on result than device quality You have to take into account at least the following parameters e The sound level meter is designed for a free field acoustic measurement e The instrument is held with reached out arm for short time measurement or positioned on a tripod for long time measurement e The axis of the
13. 49 X RUNNIDO Mor malo TTT 50 A A E 50 A thang nada asutddel ueenih a a a touh A 50 Alles Inputs OUTPUTS VO Program Ming at ls dale 51 AA A E 51 O A A MEIC TO cee areca ae eae ee 51 DOS e ase sas ct wich Sec hl tc wate teat 52 X Techhical T eT 53 o O A A 53 XI T T SACOG a r R cost en CAE E E E E EE E AAEE a OE 53 XIII 1 2 Normal frequency response IN free fleld ooooccoconnoconnoconinocnnononnnnonocnnnnnonnnnonnononnononnonannnnnnnnnnnnnnnnnns 53 UA A nid eunchavaseteauabis TT 53 AMES ARE IMC E E E en ee O ee 54 XIII 4 A C Z weightings and free field response eee eee 54 XES Filters bDy Octave Dands lt o SHZ a n a da 55 XIII 6 Measured and displayed values sss eee 55 AHE METOIOO Y oire E E a A a A TT 56 IMSS O ES L R E 56 AES TRIST elan iaa a ios 57 XIII 8 1 Removable preamplifier PR2 reirse a Aa a naaede eia ai ea e eaea i a 57 XIN 8 2 PUGS A ee A E NE E A id dd 58 PAN r MO MORA CC IAN ANA A TTT 58 XIII 8 4 Transfer plug load MAINS voltage adaptor oocccoocccccnccccnncconoconnnnonnononnononnononnnnnnnnonnnnnnnononnnnoninnaninnnos 58 ANS Memory ana storage IBe Ten a las 59 AMO AUGIO FECOrGING ee Le ia js IU ii in tino 59 AIEN POWera a operating autonO Vaciar A tdi ita 59 AIV Packaging and ACCESS OMNES iii AAA A A E aan 60 AVE SUD DUGG Wiosen tl a ie 60 A A A ee eee eee 60 XV L DB23 SOWA orozco 60 Introduction The DB300 sound level meter is an acoustic
14. AUTONOMIE 1s INSTRUMENT APROPOS i I O 2 out DC continuous analogue output 0 10V for connection to a recorder or industrial controller I O 1 in corresponds to the input for the launch and stop measurement from an industrial controller and is for Leq St 1 1 oct NR measurement modes Launching of the measurement is made for a continuous high level and stopping the measurement is made for a continuous low level I O 1 Out corresponds to the detection output compared to a preset sound level and is for L Leq St 1 1 oct measurement modes A high level appears in output when the sound peak pressure level reaches and exceeds a certain value For this type of output the following items must be configured e The level type choose L Leq or LPK depending on the mode of measurement e Programming with scrolling knob key the desired level of detection by 1 dB steps e Set a timer for maintaining the continuous signal detection after sub overshoot sound level from 1s to 10s by 1s pitch IV 4 Autonomy Autonomy provides information on the remaining memory capacity and allows AUTONOMIE AUTONOMIE CONFIGURATION Memoire 37 time measurement according to the chosen method of measurement The measurement time is calculated automatically based on the remaining memory capacity It is immediately compared to the remaining capacity of the power system batteries battery or PROG MESURE COMMENTAIRE 1 0 LECTURE PC
15. Days hours minutes seconds 00 00 00 format of the measurement time in Days hours minutes 00 00 00 format of the measurement time in Days hours minutes seconds or format of the current time 18 11 format of date 00 00 format of current time in hours minutes Pond A Cor Z frequency weightings Cte time weighting or time constant Fast Slow Impulse S S integration time controlled in Manuel mode Start Stop C CI free field correction term in calibration mode Corr corrective term of nominal benefit in calibration mode L01 L10 L50 L90 L95 Normalised statistics distribution used in environmental studies Ill Presentation of the sound level meter lll 1 Overview Windscreen essential to Electret microphone N reduce the noise induced by air Severable from the preamplifier currents inside the windscreen Removable preamplifier for the measurement at the end of an extension It displays both reserved areas for the setting of the measurement and areas for results presentation Monochrome with 16 grey blue levels it participates to the intuitive manipulation of the sound level meter Keyboard it consists of only 8 sensitive keys lts ergonomy allows an immediate and easy use of the sound level meter Se Bottom part protected by a flexible and removable LY 9 8 0 rubber breastplate it contains all input output and external power plug
16. V 2 2 Launch the measurement In manual mode press ly key the timer starts and indicates the measurement duration Timer and I O modes see page 51 V 2 3 During measurement During measurement three screens give information about the current measurement They are accessible with the scrolling knob key E1 itis the main screen that displays the instantaneous measurements e LAeq DI equivalent continuous level of sound pressure on the elementary integration time e LCeq DI equivalent continuous level of sound pressure on the elementary integration time e LAeq T equivalent continuous level of sound pressure A weighted on the current measurement duration e LCeq T equivalent continuous level of sound pressure C weighted on the current measurement duration e LUpk level of maximum peak of sound pressure on the selected integration time e Measurement duration in JJ HH MM SS 18 89 1 dB LCeq LAeq T LCeq T 00 00 00 00 01s Man 1 2 00 00 00 28 E2 this screen displays the results of values that will be stored in the memory at the end of the measurement e LUpk level of maximum peak of sound pressure on the measurement duration e LAeqM maximum value of the equivalent continuous level of sound pressure A weighted of all the logging times e LAeqm minimum value of the equivalent continuous level of sound pressure A weighted of all the logging times e LAeq equivalent continuo
17. are shown as K ee ue e An horizontal line for the maximum level oo IS i e ANI colored bar for the global level A aiii e An empty bar for the minimum level global a l h a AA S08 global E2 E3 this screen displays the results of current values that will be stored at the end of the measurement e Move the cursor in 1 with the arrow keys and select with the scrolling knob key between global ies iar ok Max min A LZeq 98 7 dB Read the different values according to the selection global Max min E oaza e Global weighted and filtered equivalent continuous levels of the measurement a be e Max weighted and filtered maximum equivalent continuous levels reached during the I e measurement base DI elementary integration time ae Mle e Min weighted and filtered minimum equivalent continuous levels exceeded during the L measurement base DI elementary integration time sos aaa 3 1 3 Main synoptic 15 05 13 15 45 D part 15 05 09 15 Sha 18 05 23 00 Dirse 04 00 30 56 Mode 1 1 oct F 31 5Hz 8kHz DI 1s Lpk C Audio non S08 02_0410 L23 Stored file gt Press Esc key to quit this file and back to main screen of files selection 38 15 05 13 15 45 Fin 18 05 23 00 Dur e 04 00 30 Mode 1 1 oct F 31 5Hz 8kHz DI 1s LOK C Audio non s08 E1 E1 screen gt lt A 250 Hz 123 4 q 110 090 080 070 a 050 030 010 I ACZ 63 250 1k 4k 16K 00 00 00 00
18. instrument must face sound source do not interfere with your own body or with any close material item furnitures machines low wall trees etc e Protect the instrument from bad weather and use as much as possible the windscreen It protects the microphone and minimizes during measurement the disruptive effects linked to air currents e Calibrate the instrument regularly with a suitable calibrator CAL200 or CAL300 type XI 3 Calibration A calibration must be performed regularly with a suitable calibrator e Insert the adapter ring according to the diameter of the microphone sound level meter Place the calibrator on the microphone until the microphone reaches the end of the ring Do this move slowly and smoothly so as not to damage the microphone Put vertically the sound level meter and the calibrator e Turn on the calibrator e Wait for a moment a correct level of acoustic pressure of the calibrator for example 94 0 dB e You can begin the procedure of calibration of the instrument as explained below 47 gt Reminder free field coefficient An acoustic reference source a calibrator or a pistonphone supplies a level of acoustic pressure During a free field measurement phenomenons of diffraction caused by the microphone and the housing come to affect the measurement This perturbation est minimized if the microphone is far from the housing For this sound level meter the induced free field perturbation is v
19. level Lpk E2 is the main screen that displays the values and a graphical representation spectrum type The different bars are for e LAeq LCeq LZeq equivalent continuous levels of sound pressure A C and Z weighted e LXeq equivalent continuous levels of sound pressure filtered by octave bands from 31 5Hz to 8 kHz e Measurement duration in JJ HH MM SS Read values e Move the cursor in 1 with the arrow keys and select with the scrolling knob key between global Max min e Move the cursor in 2 with the vertical arrow keys then select with the scrolling knob key the weighting value or the filter value and read the result displayed in 3 A vertical line is moving on the screen and is superimposed on the bar corresponding to the selected weighting or filter Do the same to read the different values according to the selection in 1 Global Max min e Global weighted and filtered equivalent continuous levels on the measurement duration e Max weighted and filtered maximum equivalent continuous levels reached during the 2 3 250 110 090 Fae z reed 080 pis 070 E 050 030 010 l ACZ 63 250 1k 4k 16K 08 A Hz 123 4 d B 00 00 00 00 global E2 measurement base DI elementary integration time 1 e Min weighted and filtered minimum equivalent continuous levels exceeded during the measurement base DI elementary integration time 250 ES G These different values
20. peak factors it is possible to choose the digital gain beyond Lok z 30 dB between 36 42 48dB During programming DB300 instrument displays maximum and minimum peak pressure levels properly recordable according to the selected criterion reference threshold and digital gain ie a Listening comfort It is recommended to keep the factory setting which is 30dB Eventually after experience on site it is possible to bring it to 24dB In this case the re listening allows an correct identification for the 4 seconds before and after the adjustable threshold exceeding Note to make more comfortable the re listening on PC we advise the use of an external amplified soeaker system to the PC CONFIGURATION PROG MESURE X 3 Use of audio recording CONFIGURATION em B PROG MESURE ik COMMENTAIRE From MENU screen select PROG MESURE 0 EFE e Press OK to validate BOW am B l e Move the cursor on Audio E S e Select YES in reverse video INSTRUMENT ves A APROPOS di ee Move the cursor to select successively e The used reference for the detection LAeq or Lpk PROG MESURE e The threshold beyond which the recording starts This threshold can be set with the scrolling a knob key in step of 1 dB and concerns either the LAeq or the Lpk according to the previous lpk selection F e The gain of the recording chain adjustable from 24 dB to 48 dB in step of 6 dB According to As ised this selection maximum and minimum recordable
21. the measurement and the instrument without being present 30 VI 4 Repetitive delayed mode Tim It is possible to programme the beginning and the end of the measurement date time on a daily duration see page 33 that has to be repeated from 2 to 10 times the following days at the same hours Example following of a sound source that is marked every days of the week e Select the icon Tim at the bottom right of the screen when set Pes K the instrument before the measurement laeg 88 7 e Press OK to go the programming screen 00 00 00 00 Ols Tim The screen of measurement programming is displayed Move the cursor on the different items and set date and time with the scrolling knob key Beginning date and time of the measurement beginning End date and time of the measurement end Move the cursor on the item Repeat to programme the repetition value from 2 to 10 OK appears Press OK key The programming of measurement launching is performed 63 Hz 130 110 090 ree oe 080 AN 070 5 050 030 010 A ez 63 250 1k 4k 16K 1 8s 00 00 00 20 1s Tim DIFF JOUR REPET D but 15 05 A 63 4 Gp 130 110 090 080 070 050 030 010 31 5 1 8s 63 250 1k 4k 8k 00 00 00 00 T Tim DIFF JOUR REPET D but 15 05 09 15 09 15 Fin 16 05 Fin 16 05 06 30 06 30 Repet RA Repet s M m M m OK Alim Alim Kan Note in case of exceedi
22. values of peak pressure levels correctly cul oe calculated are displayed Gain o da Note Durations of pre and post recordings supervising the exceeding are not adjustable and fixed at 4 seconds 44 Measurement in progress Different recordings are performed automatically without intervention and without affect metrological calculations Total recording time available being limited see page 59 be selective to select the detection threshold value in order to not use too quickly memory space and get repetitive and insignificant recordings Audio files All recordings are linked to the corresponding metrological file and saved as wav audio format on the micro SD card During data transfer on a PC the software LDS300 or LDB300 processes all the files and the re listening of files to help about sound sources recognition Listening of the audio files without software Audio files can be processed by a software LDS300 or LDB300 However if you don t have software it is possible to listen to the wav files with any kind of software suitable with wav and PC It is possible to listen to the recording but it is not possible to link them with metrological data Audio files are on the same directory and its name is the name of the metrological data file prod33 prd Detail of wav files Metrological data file gt D 50157806 L23 Directory of wav files gt 350152806 4001 way 258 Ko Son Wave a002 way asko Son Wave
23. 0 31 51 04 11 gt 4 ih 31 03 2010 01 04 2010 02 04 2010 03 04 2010 04 04 2010 05 04 2010 06 04 2010 2 y 65 7 75 80 8 AA EXPORT DEPARTMENT Boulevard de Beaubourg Emerainville BP 48 77312 MARNE LA VALLEE CEDEX 2 Qualit Tel 33 1 60 06 69 25 Fax 33 1 60 06 69 29 Ref NT DB300 29 06 12 RCS 24 P rigueux 349 282 095 Non contractual document We reserve the right to modify the characteristics of our products without prior notice
24. 00 21 36 00 B AUTONOMIE INSTRUMENT APROPOS AC adapter Menu INSTRUMENT IV 5 E Instrument Mic E HSS 12010004 f f x Preamp PR23 This screen reminds main components of the sound level meter c 12010008 e microphone and its serial number e preamplifier and its serial number e sound level meter housing e version number of the firmware 12 SLM DB300 ni 12010006 S version E33 1 V1 0 A PROPOS IV 6 About anc NF EN 61804 NFEN 61651 This screen shows the various European standards and the accuracy class of the instrument CEI 61260 It also specifies the date of the last checking and remains the next one Fabriqu en France V rifi le 01 2012 Av rifierle ae IV 7 Contrast backlight e From starting screen select icon EN and press OK to validate 7 89 1 To optimize reading of the display from this screen S We O e Position the cursor on Cont and adjust the contrast by choosing ds with scrolling knob key a level from 1 to 7 L e e Position the cursor on Retro and adjust backlight by choosing with e U scrolling knob key a level from 1 to 3 S 314 A 00 00 00 Contrast Backlight 13 V Perform some measurements V1 Conventional and averager integrator sound level meter with storage function Select L Leq mode move the cursor with arrow keys on icon then press OK V1 1 Conventional or classical mode The measurement is immediate yet it is interrupted and reset with each cha
25. 043 9 ae ane ime A co a ao a RAZ S1 calculation S2 calculation S1 S2 results Storage e Reject measurements and not store them move the cursor on RST and press twice on OK key to confirm A banner displays the phase of data deletion 28 RESULTAT RESULTAT s1 s2 048 1 s1 s2 048 1 e RAZ RAZ s2 046 1 2 046 1 OK STI si 1 043 9 1 043 9 00 00 04 00 00 04 S1 S2 results RST active Deletion VI Modes of measurement launching VI 1 Generalities DB300 instrument has four modes of measurement launching e Immediate mode manual launching with the keypad Delayed mode Tim programmable launching and stop on a free duration Repetitive delayed mode Tim launching from 2 to maximum 10 times of a daily programming limited to 24H59M00S I O mode launching by order of an electronic signal Example industrial controller The following modes Delayed Tim mode Repetitive delyed Tim mode and I O mode are related to the following measurements modes I integrator averager with storage sound level meter A and C weightings integrator averager with storage sound level meter A C and Z weightings and analyser by filters of octave bands from 31 5Hz to 8kHz Analyser sound level meter to measure the noise of equipment in correspondence with NR curves as per NF S wail 30 010 standard Informations When u
26. 1 2 e Move the cursor to 3 and select S1 S2 with the scrolling knob key to measure the two sound sources In the example outdoor heat pump 1 in a background noise during the day S2 s1 s2 082 6 e Launch the measurement with the pictogram Stop the measurement when it seems representative stabilized evolution of the LXeq value with the U pictogram e Stop the 1 sound source in the example heat pump e Launch the measurement of the S2 sound source background noise with the vn pictogram 00 00 00 Measurement of the 2 sound source will stop by itself after time T chosen for the measurement of the m S1 S2 sound source and the S1 and S2 sound source level is displayed on the sound level meter S2 dB S1 dB In case of improper handling and or of calculation impossibility result will not be displayed NOTE Example 1 S2 level is lower than S1 so S2 can not be calculated Dashes will appears on the screen L instead of numbers 27 V 6 2 Store data At the end of the measurement the screen of all results is displayed example adding of two sound sources It is then possible to e Accept measurements and store them move the cursor on Sto and press once on OK key to confirm A banner displays the storage phase 51 s2 RESULTAT aa dB Te dB si s2 048 1 l s2 A vu s 1008 81 s2 046 1 o a 1043 9 s 043 9 s
27. 4 dB A LCF 67 4 dB Lpk c Lpk C LCS 78 5 dB LCS 78 5 dB LCI 67 4 dB LCI 67 4 dB s08 S08_0410 L23 sog E1 v S08 max E2 h 4 08 min E2 E2 max screen E2 min screen 15 05 D part Fin Dur e Mode Pond Cte Lpk S08 13 15 45 15 05 09 15 18 05 23 00 04 00 30 L Leq A C F S I C S08_0410 L23 Stored file 35 VII 2 2 Leq St mode file When the file has been identified by its identification number gt Press OK to go to E1 screen which remains the measurement configuration e Date of measurement start e Date of measurement end e Measurement time expressed in DD HH MM SS e Measurement mode mode e Frequency weighting for the Leq Weig e Elementary integration time for Leq DI e Frequency weighting of the level of peak pressure for L LpK e Audio recording Audio gt With scrolling knob key go to E2 screen for the A and C weighted results e LUpk level of maximum peak of sound pressure on the measurement time e LAeqM maximum value of the equivalent continuous level of sound pressure A weighted of all the elementary integration time e LAeqm minimum value of the equivalent continuous level of sound pressure A weighted of all the elementary integration time e LAeq equivalent continuous level of sound pressure A weighted on the total measurement duration e LAE A weighted sound exposure e T measurement duration in JJ HH MM SS e percentage of saturation of the inp
28. CTURE v AutoOff Oui gt Date 02 09 20 11 PC AUTONOMIE INSTRUMENT A PROPOS Heure vieny Configuration From this screen use arrow keys to move the cursor in the desired area and modify with the scrolling knob key the proposition Various parameters to adjust are e Lang user language French or English e Bip the presence or absence of tone when pressing a key The beep disappears by itself if it interferes with the measurement e AutoOff yes or no If yes is selected the instrument will stop after 15 min of non use This disposal allows to save battery if there is no measurement launched e Date Hour Set date and time X To return to main screen press KA 10 IV 1 1 Set time CONFIGURATION CONFIGURATION From Configuration screen use the arrows to move the cursor in the ou Bip Oui date time area Autoort Oui Autooff Oui x f 02 09 20 11 Es 09 20 11 Date the cursor is put successively with the arrows on days months and years then use the scrolling knob key to select the correct number Time setting time must be done by comparison with a reference clock for example the speaking clock The simultaneity must occur at the beginning of the minute when the seconds display 00 of the reference clock Proceed as follows e Move the cursor from date to hour a 3D OK appears Heure e Adjust hours then minutes and validate with OK key when the 10 30 00 ref
29. KIMO INSTRUMENTS Pressure Temperature Humidity Air velocity Airflow Sound level Sound level meter DB 300 2 Table of contents A EMER GAUGE Usa art ecient A A a ias 5 N VO CAD T ATT TT 6 lll Presentation of the sound level meters sss cesses sese 7 A A A a E A 7 IIl 2 Presentation of the screen keyboard QrOup cccceccccseececeeeeeceeeeeeeeeeeseeeeeeaeeeeseeeeeseeeeeseeeeeseeeeeaeeeessaeeeeseeesaeeeess 8 lll 3 Screens oveni Ws sees eee eee a es ee ee TA 9 PV SeN OO 10 AN E a A O 10 IVE E E E NIG EE EEE EI TEA TET EE E T E E TEE A TE AE ATE ETT 11 Vez Measurement programming PTT 11 T E E EE A E EEE 12 VE AUN OI a ardid 12 MoNS TUMMEN essi a a dew ance aa acess eee de 12 M eE cla TTT 13 INT Contrast BACON tools lirica 13 V Perform some measurements sees e eee e eee se ecce eee eee eee eee 14 V 1 Conventional and averager integrator sound level meter with storage funciona see ee ee eee eee 14 Ve T 1 CONVERTIMOS acne aes ee ee 14 V 1 2 Possible selection for the measurement eee e ee ee 14 VES Screens d urnng measurements at A A bis 15 V 1 4 Conventional and integrator averager with storage MON occcconccccnccconccocnnconnononnononnononnnnnnnononononnononnnnoninos 15 V 1 5 Screens during Measurements ietis a e a a e e A 16 UE e Stop AO MEA eea 17 A A A 17 V 2 Sound level meter and averager integrator with storage TUNC ION oooocccocccnncconnconncnnnonnnonnnnnnnnnnnonnnnonnnn
30. Predefined mode by selecting a value between 3s 5s 10s 15s 30s 60s the T Man measurement begins with a manual start 1 2 2 Select the launching mode in 2 with the scrolling knob key Man manual Tim timer I O with I O signals A In predefined mode of the measurement duration 3s 5s 10s 15s 30s 60s only the manual mode is accessible Tim and I O modes see page 51 Note current time is displayed before launching the measurement 24 V 4 2 Launch the measurement Type of launch Manual Tim and I O mode see page 51 1 Select the measurement duration Move the cursor in 1 and select with the scrolling knob key T or or a predefined duration between 3s and 60s Press key the timer starts and indicates the measurement duration V 4 3 During the measurement During the measurement three screens give information about the ongoing measurement Thery are accessible with the scrolling knob key E1 itis the main screen it displays values and graphical representation spectrum type The different bars stand for e LXeq equivalent continuous levels of sound pressure on the measurement duration filtered by octave bands from 31 5Hz to 8 kHz e Measurement duration in JJ HH MM SS E2 this screen displays the results of values that will be stored at the end of the measurement e LCpkMax maximum peak pressure level of the ongoing measurement e LAeq LCeq LZeq equivalent con
31. Z is performed in the main menu PROG MESURE 3 During measurement two actions are possible e Reset the memorized levels mainly the peak pressure level LCpk e Go to E2 screen to read the different values instantaneous minimum or maximum values 4 To reset all the values Press OK key RST function is activated and is about RST activation e Maximum and minimum sound pressure levels available on E2 screen e The maximum peak pressure value and the linked bargraph ES OK e Overload information RAZ RAZ 14 V 1 3 Screens during measurements 1 From El screen press the scrolling knob key to display E2 screen 2 Move the cursor with the arrows on the item 1 and select with the scrolling knob key among Inst Max min to read instantaneous maximum and minimum values of LXY sound pressure levels 3 To reset all the values Press OK key RST function is activated and is about e Maximum and minimum sound pressure levels e The maximum peak pressure value e Overload information LCF LCS LCI RAZ L AF LAeq LCeq 103 6 88 7 61 4 78 6 88 7 61 4 78 6 Inst RAZ gt 19 gt V 1 4 Conventional and integrator averager with storage mode 55 2 98 7 31 4 00 00 05 RST activation LCF LCS LCI RAZ 103 6 92 4 91 2 101 9 93 6 92 8 102 7 The integrator averager mode completes the conventional mode always active read above It allows to
32. aining measuring capacity Start or stop a measurement are very easy to perform Directly with the keyboard in instantaneous mode or scheduled later or With an automation I O plug The sound level meter also communicates with an automaton through I O plugs e 0 10 V DC analog output e Control bit activated as per pre programmed threshold e Threshold detection for external alarm ll Vocabulary The terms and abbreviations listed below will be used throughout this user manual L Leq represents the measurement mode conventional and integrating averaging Values are measured simultaneously Leq St represents the measurement mode integrating averaging sound level meter with storage function The equivalent continuous sound level on the logging time DI is stored into the memory 1 1 oct analyser integrating averaging sound level meter with storage function and with filter by octave bands NR mode to measure noise level of machines or installations according to NR curves S1 S2 denomination for measuring or calculating the levels of 2 sound sources LXeq X weighted equivalent continuous sound level on the logging time or on the total time of the measurement LXeqM Maximum X weighted equivalent continuous sound level on the logging time on the total time of the measurement LXeqm Minimum X weighted equivalent continuous sound level on the logging time on the total time of the measurement LXE X weighted sound exposur
33. at low temperature e Batteries pack 3 alkaline batteries 1 5V LR6 AA type Autonomy 20 C lt 8H in continuous e Battery rechargeable Li lon type 3 7 V 4400 mAh Caution Li lon battery is a delicate element Take care when manipulating or storing Autonomy 20 C gt 24H in continuous e Mains supply charger type universal USB format ref AS 123 PRI 100V 240V 60 50Hz 150 mA SEC 5V 1000mA 5VA Autonomy unlimited depending on memory capacity of the measurement see table above D When a connection to a PC for data transfer the USB computer delivers a voltage of 5V DC 500mA under L This power supply has priority over the battery pack or battery that is recharged through this power supply 59 XIV Packaging and accessories XIV 1 Supplied with The sound level meter is supplied in its transport case with its microphone and preamplifier a battery and a batteries pack 3 x LR6 AA a USB charger a windscreen a USB cable a CD ROM with LDB23 software and user manuals A calibration certificate is also supplied XIV 2 Optional e Acoustic calibrator class 2 CAL200 Acoustic calibrator class 1 CAL300 e Telescopic tripod PPCX e Jacks cables I O interface on request e Extension for preamplifier on request XV LDB23 software Supplied with the sound level meter LDB200 software allows the configuration data recovery and exploitation stored in the memory of the i
34. atically set at 1 second AAA O SSS 3 HHR is nas H H a SE IE E N r LO LO O Un all k ss K m LAeq DI Seuil 00 O D py TIN MZ EIN ALTA AN A EUN eee S Y PO 0 OOO eee 70 K A 9 2 oy SN B AN OD Oo OD DV a K A 6 N no VARKVLEIS PG SM D L ND D ah ah oD 2 A PPTP SO E TEE EEE PAPA AAA AA AA AA AA PP PP 0 0 0 OS X 2 Synoptic of the management of the recording dynamic The gain is initially set at 30 dB dB 140 120 OdB 100 Comfortable listening level T 30dB a0 Moderate to low listening level 430B 60 Digital gain for recorder 40 20 Measurement dynamic 117 dB class1 or 107 class 2 43 Selection of a detection level for an audio recording it must be on the planned measuring range 30 137 dB Setting of the digital gain for audio recording the recorder dynamic is set in factory at 30 dB This means that the recorder has 30 dB in storage in peak pressure value beyond the selected detection threshold in LAeq or LCpk Example detection level LAeq 1s 105 dBA Sound sources higher to this level are recorded without distortion if and only if the maximum peak level does not exceed 105 30 135dB peak Generally sound sources have some high peak factors pretty much from 20 to 30dB That s why PROG MESURE it is not possible to set the gain at a value lower than 24dB However in situations where sound L sources are elaborated with very high
35. d source that causes the exceeding and makes easier its identification As it is an help for the recognition of sound sources and in order to optimize material resources the audio recording format on the SD card is defined as follows e Accuracy 16 bits e Sampling 12 kHz DB300 instrument having a wide measurement dynamic 107 dB it is likely that the re listening with a computer does not allow an easy identification according to the selected detection threshold To optimize the listening the audio recorder incorporates an adjustable digital gain from 24 to 48 dB with a step of 6 dB This adjustment has no incidence on the measurement and interferes on audio files only So according to measurement conditions and selection criteria this adjustment allows to adjust the reduced dynamic of audio listening computer ear environment about 50 dB to this more extensive of DB300 instrument 107 dB Important to make more comfortable the re listening on PC we advise the use of an external amplified speaker system to the PC 42 X 1 Temporal synoptic UN Area of exceeding of sound level on threshold ex 87 dB Tgl pre and post recording set at 4 seconds for supervision of audio exceeding on threshold Final recording pre and post exceeding exceeding VERY IMPORTANT when audio function is activated the DI duration of elementary integration for calculation of the LAeq LCeg and LXeq equivalent continuous level is autom
36. d stop the measurement with an external electronic command The signal comes from every electronic system that can provide a continuous electrical signal of 5V maximum called TTL Ex controller for the monitoring of industrial process e Select I O icon at the bottom right of the screen when set sm Ja Sot 8 TOO o the instrument before the measurement a S l A 090 ee eee ae a 4 050 E E ll 1 00 00 00 00 LAeq e Connect at the bottom of the instrument in the I O 1 plug a a 2 5 mm of diameter Jack cable LAeq T LCeq T 130 110 090 080 070 050 030 l 010 p 31 5 63 250 1k 4k 8k 1 8s 00 00 00 00 ols 1 0 1s 1 0 1 0 00 00 00 20 Principle A measurement launching according to the I O mode is performed O E T o once an electrical voltage of maximum 5 VDC appears on the 1 01 Measurement In It stops once this same electrical signal backs to 5 VDC see Measurement Measurement page 58 for the feature start stop Schema 33 VII Read the stored files After a controlled stopping of the measurement and a data storage it s possible to see on the screen measurement dataset results VII 1 Access to files ePress menu key then go to Read then press OK Information of the last stored file is displayed In order to make easier its identification the screen displays the entire configuration of the measurement e The mode L Leg Leq St 1 1 oct NR 1 2 e According
37. de move the cursor with the arrows to Adin then press OK The sound level meter runs as a frequency analyzer and processes the acoustic signal according to the temporal mode e Ona T D measurement duration with data storage for each DI elementary integration time Measured and stored data for each integration time e LAeq DI equivalent continuous level of sound pressure on the elementary integration time e LCeq DI equivalent continuous level of sound pressure on the elementary integration time e LXeq DI equivalent continuous level of sound pressure on the elementary integration time filtered by octave bands from 31 5 Hz to 8 kHz e LUpk level of maximum peak of sound pressure on the elementary integration time e Measurement duration in JJ HH MM SS Integration time The data storage is made according to an integration time DI to select 1 16s 1 8s 1 4s 1 2s 1s 2s 3s 5s 10s 15s 30s 60s In order to have permanent control of the sound pressure level before the launch of measurement the sound level meter calculates and displays the equivalent continuous level of acoustic pressure on a logging time of 1 8 s MOTE aaa V 3 1 Settings to perform before the measurement 1 Select the DI logging time e Move the cursor in 1 and select with the scrolling knob key among 1 16s 1 8s 1 4s 1 2s 1s 2s 3s 5s 10s 15s 30s 60s ES E 2 Select the mode of measurement start in 2 with the scrolling knob
38. e and the storage time depends on the importance of metrological data and of the number and size of audio files e Metrological data brief time e Audio file it can last from a few seconds to 40 min At the end of the storage the instrument turns off Repetitive delayed mode from 2 to 10 repetitions without Audio function storage is made at the end of the measurement if the daily duration doest not exceed 23H59M00S The last minute is for the storage of metrological data e Atthe end of the storage the instrument activates its sleep mode and starts again at the next period etc Conclusion all periods will start at the same time but the daily durations will be limited to 23H59M00S Repetitive delayed mode from 2 to 10 repetitions with audio function storage is made at the end of the measurement if the daily duration doest not exceed 23H20M00S The last 40 minutes are for the data storage e Atthe end of the storage the instrument activates its sleep mode and starts again at the next period etc Conclusion all periods will start at the same time but the daily durations will be limited to 23H20M00S Note if there is no audio file then the maximum daily duration will be 23H59M00S Additional information for acoustic studies on successive days it is advised to perform a single measurement of several days or weeks and to reorganize in daily periods with the operating software VI 5 1 0 mode It is possible to launch an
39. e available calibrator follow the instruction below A e Move the cursor on Ref With arrow key adjust to the desired value dB per dB with the scrolling knob key v This new value is memorized until the next change A This new value must be set between 70 dB and 130 dB 48 XI 4 Maintenance The sound level meter conception allows a reduced maintenance which consists in changing batteries and cleaning the instrument with a slightly cloth A particular attention must be paid to the microphone sensor which is the element the most sensitive of the metrological chain XI 9 Regular checking Like most measuring instruments it is strongly recommended to regularly control and calibrate the sound level meter Return to the manufacturer each year will provide necessary metrological traceability XI 6 Replace the battery by a batteries pack In case of impossibility to load the battery it is sometimes unavoidable to replace it by a batteries pack The batteries life will decrease from 8 to 10 hours in continuous operating e Turn off the sound level meter e Remove the battery do not forget to disconnect the cable e Connect the battery respecting its insertion direction mechanical keying of security e Slide the battery into the housing e Close the back hatch XI 7 Replace the batteries if equipped e Turn off the sound level meter e Return the instrument e Open the back hatch e Remove the 3 batter
40. e level LXY X weighted acoustic pressure level time weighting Y LXYmax Maximum X weighted sound pressure level time weighting Y LXYmin Minimum X weighted sound pressure level time weighting Y LUpK LUpKmax U weighted peak sound level maximum U weighted peak sound level DI Programmable logging time for the calculation of the equivalent continuous sound level stored into the memory also called elementary integration time X generic marking for standardized frequency weightings A C Z or filters by octave bands L Leq LE values U generic marking for frequency weightings C or Z standardized Lpk values Y generic marking for time weightings with F for Fast S for Slow or for Impulse Man manual mode of measurement launching I O Launching mode of the measurement controlled by I O plugs SXXX order number of the measurement sessions Limited to 999 RST reset of calculations of maximum or minimum values memorized erasing of measurement session or of the whole memory Sto storage of measurement session into the memory S1 name for measuring or calculating the equivalent continuous sound level of a first sound source S2 name for measuring or calculating the equivalent continuous sound level of a second sound source S1 S2 name for measuring or calculating the equivalent continuous sound level of the two sound sources 00 00 00 00 format of the measurement time in
41. el reaches and exceeds some value Settings are made in the menu I O 1 O e Select the type of level L Leq or Lpk voz DC 0 10V e Set the desired detection level with the scrolling knob key by step of 1 dB A e Select a time delay of stability of the continuous signal of detection after being below the G aa sound level from 1s to 10s by step of 1s yor rn cR Conventional sound level meter and avereger integrating with storage e For LpK selection the detection comes from the oe See i peak pressure level C or Z weighted according to 7 o es the measurement programming i e The sampling rate of the value is fixed A at 16 Hz that is a comparison to LXY e For Lileq selection the detection comes from them 352 threshold every 63 ms level of sound pressure LXY indicated under L eee 00 00 05 in Integrating averaging sound level meter with storage A and C weighted J e The comparison is made for each e For LpK selection the detection comes fromthe T T duration of elementary integration from peak pressure level A 1 16 s to 60s e For L leq selection the detection comes from the dee Mee Ie LAeq equivalent continuous level only ear 908 2 T 00 00 00 28 S 51 Integrating averaging sound level meter A and C weighted and analyser by octave bands filters from 31 5Hz to 8 kHz with storage a 250 Hz 123 4 dB e The comparison is made for each duration of elementary integrat
42. en 00 00 00 00 Ols Tim Is Tim T Tim The screen of measurement programming is displayed i i i j DIFF JOUR REPET DIFF JOUR REPET e Move the cursor on the different items and set date and time with the E o me D but 15 cou scrolling knob key 9 y 09 15 09 15 Beginning date and time of the measurement beginning End date and time of the measurement end i 15 E os o 7 e e Move the cursor on the Repeat item to validate the value at 01 OK 16 30 16 30 appears Repet 1 Repet e Press OK key TA S The programming of measurement launching is performed The two last lines of the screen indicates e That the memory capacity for the number of sessions is enough 999 max OK e That the power capacity allows the measurement OK DIFF JOUR REPET D but 15 05 In case of incompatibility o M k e K is displayed instead of OK in this case empty the memory of the l instrument S EN e Load the battery or change batteries Alim E e ifthe power adapter logo blinks it is imperative to use a power adapter e When the logo stops blinking it means that the power adapter is connected Note Using the delayed mode without programming the date and time of measurement beginning current date and time still present but by programming the date and time of measurement end the measurement starts immediately after the validation and will stop at the programmed hour This type of programming allows to stop
43. erence clock is at 00 second 7 The 3D OK disappears OK To back to main screen press IV 2 Measurement programming PROG MESURE 1 O OG SU From MENU screen use the scrolling CONFIGURATION Filt 10Hz knob key to move the cursor in the nee aut pe PROG MESURE area then press OK COMMENTAIRE p p gt Audio Then move the cursor and make a selection 0 E a for each parameter LECTURE PC AUTONOMIE INSTRUMENT APROPOS This screen allows to set the following parameters e High pass filter 10Hz it preferable to activate it in order to avoid overloads of low frequencies of the input stages of the sound level mater before digital processing Use example when there are strong wind movements in the environment roads rail doors ne opening or closing in rooms etc E S s PROG MESURE PROG MESURE Audio non Audio YES Audio e C or Z weighting for the measurement of the peak 2 pressure level Gain 30 dB Max 109 0 dB min 59 0 dB e Audio recording on threshold if this function is activated more parameters are displayed on the bottom of the screen see page 44 11 IV 3 1 0 The 1 0 input output allows to connect 2 5 mm jacks It is located at the bottom of the unit behind the rubber breastplate 1 0 1 0 CONFIGURATION e DC 0 10V PROG MESURE Nad a s COMMENTAIRE j p U 1 0 p p OK p 1 01 verr LECTURE out PC v 100 dB
44. ery low and it is not necessary to introduce a free field correction gt Operating mode e From starting screen select Cal with arrows keys then press OK CALIBRATION C c 0 0 dB f i Wi LCF dB i i if NR z 0 5 The instrument displays a new screen 05 10 2011 e Check that the reference value Ref is equivalent to the value of the used ET E calibrator and to the value of free field correction C Cl 0 0 dB for the sound E z level meter ca gt a ca o a e Put the operating calibrator on the microphone o E cr RER ee e Put the cursor with the arrow keys on LCF es s The instrument automatically adjusts the gain of the chain to get the coincidence of the displayed levels in Ref and LCF Once the measurement is stabilized Cal press OK key to validate The correction value of the gain and the calibration date are memorized and visible for the next calibration e Press Esc key to quit this function 05 10 2011 Cal 05 10 2011 This correction can not exceed 2 dB If the correction exceeds 2 dB the coincidence values in Ref NOTE and LCF is not obtained Reasons of this difference shall be identified defective microphone level value of the calibrator not adapted gt Modification of the reference value The reference value preset during the manufacturing process shows that we use calibrator with rated value of 94 dB at 1000 Hz lf the proposed reference is not the one of th
45. g C frequency weighting Z frequency weighting LIN Place the cursor with arrow keys on the area 2 and select with scrolling knob A C or Z Note current time is displayed before launching the measurement s1 a V 5 2 Make calculation of two sound sources 00 00 00 Leq gt e Measure 1 sound source Move the cursor to 3 and select 1 with the scrolling knob key then launch the measurement with ln pictogram Stop the measurement when it seems representative stabilized evolution of the LXeq value e Measure 2 sound source Move the cursor to 3 and select S2 with the scrolling knob key then launch the measurement with EN pictogram The measure will stop by itself after time T previously chosen for the measurement of the S1 source The equivalent continuous level calculated from the two combined sources is displayed in front of S1 S2 V 6 Determine a sound source among two T The determination of a sound source among a set of two can not run unless the operator can interrupt one of the two sources the aim being to estimate the sound level of a source without the presence of the other source Example outdoor heating pump in a background noise during the day Estimate the sound level of a heat pump without the background noise of day to estimate the possible nuisance of the heat pump in a noise environment less noisy as the one present the night V 6 1 Perform the measurement 2 S
46. gging time ex DI 60 is not completed Pressing U key will be inoperative 19 V 2 5 Store data At the end of the measurement in manual made a screen of all results is displayed It is then possible to e Accept measurements and store them move the cursor on Sto and press once on OK key to confirm A banner displays the storage phase gt LpkC 99 5 dB p A LAeqmax 98 7 dB C 89 1 dB LAeqmin 31 4 dB ols M 88 7 A LAeq 67 4 dB e 5 i A STOP C 0001 30 STO S11 LCeq 91 4 dB S11 A 02 L01 95 4 dB LAeq T 86 7 a L10 75 9 dB L50 68 1 dB LCeq T 90 8 A an 45 6 dB E dB L95 33 2 dB T 00 00 00 28 e R eq St E1 Leq St x S Ongoing measurement Results screen Storage e Reject measurements and not store them move the cursor on RST and press twice on OK key to confirm A banner displays the phase of suppression of data LpkC 99 5 dB LpkC 99 5 dB LAeqmax 98 7 dB LAeqmax 98 7 dB LAeqmin 31 4 dB LAeqmin 31 4 dB LAeq 67 4 dB AE a a LAE 78 5 dB RAZ RAZ T 00 01 30 T 00 01 30 A 02 A 02 LO1 95 4 dB L01 95 4 dB L10 75 9 dB L10 75 9 dB 150 68 1 dB L50 68 1 dB L90 45 6 dB L90 45 6 dB L95 33 2 dB L95 33 2 dB ARIS SUOR RST active Deletion Timer and I O modes data storage is automatically made without intervention 20 V 3 Analyser integrating averaging with storage sound level meter function e Select mode 1 1 oct mo
47. ghted according to times constants Slow Fast and Impulse Ex LAFmin e Peak pressure level C or Z frequency weighted Ex LCpK e Equivalent continuous level of sound pressure A C or Z frequency weighted or filtered by octave bands from 31 5 Hz to 8 kHz on a T measurement duration Ex LXeq T or LXT e Equivalent continuous level of sound pressure A C or Z frequency weighted or filtered by octave bands from 31 5 Hz to 8 kHz on a DI elementary measurement duration Ex LXeq DI e Equivalent continuous maximum level of sound pressure on a DI elementary measurement duration measured on the entire measurement Ex LXeq M e Equivalent continuous minimum level of sound pressure on a DI elementary measurement duration measured on the entire measurement Ex LXeq m e Exposure level to noise A C or Z frequency weighted on a T measurement duration related to a reference duration of 1 s Ex LAE Statistical indices Definition When the noise level is fluctuating the distribution of the measured levels can be characterized by statistical indices These indices are statistically calculated from the time evolution of the noise level measured on site These levels correspond to the sound pressure level X weighted which is exceeded during N of the considered time interval It is noted LN Therefore the L1 statistical index corresponds to the noise level exceeded during 1 of the time of observation L50 during 50 of the time The calculated i
48. h the arrows on the icon in then press OK The sound level meter processes the acoustic signal for each elementary integration time and stores results in a saved memory Measured and stored data for each integration time e LAeq DI equivalent continuous level of sound pressure on the elementary integration time e LCeq DI equivalent continuous level of sound pressure on the elementary integration time e LUpk level of maximum peak of sound pressure on the elementary integration time e Measurement duration in JJ HH MM SS Integration time Data storage is made according to logging time DI to choose from 1 16s 1 8s 1 4s 1 2s 1s 2s 3s 5s 10s 15s 30s 60s MOTE adulta In order to have permanent control of the sound pressure level before the launch of measurement the sound level meter calculates and displays the equivalent continuous level of acoustic pressure on a logging time of 0 5s V 2 1 Setting to perform before a measurement 1 Select the frequency weighting of the peak level of sound pressure C or Z see PROG MESURE in the main menu 2 Select the logging time DI Move the cursor in 1 and select with the scrolling knob key among 1 16s 1 8s 1 4s 1 2s 1s 2s 3s 5s 10s 15s 30s 60s 3 Select the mode of measurement start in 2 with the scrolling knob key among Man manual Tim timer I O with I O signal Info current time is displayed before launching measurement
49. he metrological data file Metrological data file prod33 prd Details of wav files Be D 50152806 L23 Directory of wav files 50152606 2 4001 444 E a002 way E 4003 44 258 Fo Son Wave 35 KO Son Wave izko Son Wave In case of audio files recording the measurement file and the wav audio files are in a same sub directory when transferring to a PC with the software LDB23 software supplied with DB300 doest not allow an automatic processing of wav files see page 45 IX Reset memory After datasets storing thanks to the transfer to computer it s possible to erase sound level meter memory There are two methods e Through sound level meter see below e Through computer see LDB23 software user manual Through the sound level meter e Goto PC screen of the sound level meter from the menu icon select PC then press OK e Move the cursor to RST with left arrow key e Press OK key RST blinks e Press OK key to delete all data progress bar is displayed pe PC PC PC CONFIGURATION PROG MESURE e Te n Date 25 01 2011 Date 15 01 2011 COMMENTAIRE ous 10 20 55 10 20 55 Y Ex LECTURE DB300 PC DB300 PC DB300 PC O PC AUTONOMIE R AZ INSTRUMENT A PROPOS RAZ USB RAZ USB RAZ USB a K Menu PC Date 15 01 2011 10 20 55 DB300 PC es RAZ USB Progression of deletion A All the sessions in the sound level meter will be permanently deleted gt Press Esc key to quit this file and back
50. ies and replace them respecting the meaning e Put the back hatch XI 8 Load the battery Use a USB power adaptor which serves as a charger It s also possible to connect the sound level meter to USB port of a running computer Battery will load according available current at the USB output about 500 mA A time of about 8 to 10 hours is needed to obtain a full charge Meaning of warning light located next to USB port e Red warning light ongoing load e Green warning light completed load e Blinking red green warning light battery is disconnected check the connection or contact customer support e Orange warning light after a load period load or battery trouble disconnect then connect again the charger Red warning light must be turned on to finish loading If orange warning light appears contact customer support XI 9 AC adapter For measurements over long periods if possible use the AC adapter supplied with the instrument Battery pack or optional battery must stay inside the instrument in order to preserve measurement in case sudden failure of the sector 49 XII Running information XII 1 Over range Under conditions of measuring range excess defined at 140 2 dB Z peak an over range icon appears Its displaying differs with the measuring mode selected e L Leq mode LXY it comes fleetingly for each exceeding It stays visible at least 1s for a better readability LXpk and Leq warning l
51. ight appears during the first overload of the input stage it stays visible during all the measurement e Leq St 1 1 oct NR modes Leg 0 5s warning light appears for each overload of input stage it stays visible during the integration time of 0 5 s then switches off and so on Leg DI and LXpk both warning lights appear for each input stage they stay visible during the integration time from 1 16 s to 60s then switch off and so on Leg T warning light appears during the first overload of the input stage it stays visible until the end of the measurement e S1 S2 mode Warning light appears at the first overload of input stage for each measurement it stays visible until the end of the measurement e of presence of overloads of the input stage This information can be required during a mid and long term measurement when overload indicator is displayed lts presence does not provide information about the frequency of occurrence of the overload but the percentage calculation provides a level of alert about measured and displayed levels by the instrument A LXY minimum value may have been overloaded for example a level of 110 dBA with a high peak factor M TE while a LXY maximum value of 125 dBA with a low peak factor can not be overloaded XII 2 Power supply When the instrument is equipped with alkaline batteries or with a battery a symbol informs the user about the remaining power In case of low power
52. interrupt the programming e ese eee eee ee eee 32 VI 4 3 Delayed mode Tim data storage and audio Hes 33 Vbo VOMA o a Eaa cea cia aA AE 33 VI Read the stored THES a e o OS 34 WIETACCESS 10 TIES soars euor ied usce o a o 35 VEZ Redd data Or MG Tile o id 35 V2 Eeee MMS A e dasa ids 35 VEZ EOS dl A 36 VI2 3 T octave mode oo 37 Ep NR MOISE E QUIEN EMS ec 39 VU oO TOS TIC IOC TTT 40 Vi Transfer tiles tO a a 40 O A 40 VIII 2 Files format and structure on the micro SD Card sese eee 41 AS RESECMEMOIY i a a a a A a 41 A gt Au dio recording Be e Niii E E 42 E Temporal neee 43 X 2 Synoptic of the management of the recording dyNaMiC occooocnccoccnccnncncnnncnnnnnnnnnnnnnonnnnnonncnnnnnrnnonnrnonanrnnonennnnnanes 43 KS USE Ol audio ECON cies 44 X 4 Measurement in progress Data readino ooccccooccccocncconcnocannnononnnnnnonnnnonnnnonrnnonrnnnnrnrnnrnnnnnnonrnnnnrnnnnrinrnrnnnnnnenens 46 XI Direction for use and maintenance of the sound level meters sssss sss sees 47 Al SS VAIO parrilla 47 EZ ECHO TOUS A a 47 A Peace caked senct sate aoe cecudes eds cccbiarsste ace Sandee nade uch adetasGute E E EE 47 A e E ote A ie ch hain tal no Secure alti E lo Ares ancl ieetals 49 PP ONS SG Ula CNEC IMAG A Mad ientueRlamantagumdliade Jvatadlanvutdstdiiuel a tins don Setiugiinats ya ddd 49 Al 6 Replace tne battery by a batternes PACK TTT 49 Ale Replace the Dates alabado 49 AS LOA the patea A A da 49 A TTT
53. ion e For LpK selection the detection comes from the peak pressure level lhon 1 46 s to 60s e For L leq selection the detection comes from the z T LXeq equivalent continuous level chosen in the E I selection of reading values een Ols Man XII 3 3 I O 2 Out It is the analog output 0 10VDC of the selected value L Leq only no peak pressure and concerns the measurement modes below Conventional sound level meter and avereger integrating with storage e For L leq storage DC output is for the level of m 4 We eae a sound pressure LXY indicated under L Se ee aes i every 63 ms 7 As A F 55 2 LAeq 98 7 A 31 4 A 00 00 05 RAZ E1 LCeq in Integrating averaging sound level meter with storage A and C weighted ra 89 1 e DC output is for each duration of e No LpK selection possible a y elementary integration from 1 16 s e 91 4 F to 60s e For the L leq selection DC output corresponds to the LAeq equivalent continuous level only AE e Pa Lceq T 90 8 a T 00 00 00 28 Integrating averaging sound level meter A and C weighted and analyser by octave bands filters from 31 5Hz to 8 kHz with storage qa A ES e DC output is for each duration of e No LpK selection possible elementary integration from 1 16 s AE ede ee to 60s e For the L leq selection DC output corresponds to 7 0 the LXeq equivalent continuous level chosen of the oso i
54. ion The finger must slide from an arrow to the other one simulating a scroll wheel action From the bottom to the top to increase or from the bottom to the top to back to the previous proposal Validate a suggestion or an action to lead present in an outer shaded frame Go to the main menu to return to the previous screen fa E k H co Exit a menu screen to return to the previous screen Launch a measurement then pause it if necessary Finally stop measurement Enable disable the backlight On Off 111 3 Screens overview ch on off Press On Off key INSTRUMENTS INSTRUMENTS Press OK on the DB300 pictogram in 3D the main screen appears Move the cursor on the icon corresponding to the required menu that becomes reversed video then press OK Information DB300 N 12120399 Versin E33 1 V 2 3 Etalonn le 07 04 2012 NF EN 61672 NF EN 61804 NF EN 61651 CEl 61260 Classe 2 General information about the instrument L A AF 55 2 LAeq 98 7 F 31 4 A LCeq dB 00 00 05 RAZ E1 Conventional sound level meter and integrating averaging mode CY S1 52 S2 S1 1 S2 S1 00 00 00 Leq A Amount difference between 2 sources T 00 00 00 00 01s Man Integrating averaging mode with storage Aand C weightings Back to selection screen
55. is possible at any time to stop the waiting mode or the sleep mode and launch the measurement In waiting mode just press the EN key The measurement starts immediately In sleep mode e Press on off key to reactivate the instrument The waiting screen is displayed BH key to start the measurement e Press In all cases there is only the launching of measurement that is modified programming of end and daily repetitive remain the same as the ones initially scheduled VI 4 2 Delayed mode Tim interrupt the programming It is possible to interrupt at any time the waiting or sleep modes and stop the current mode In waiting mode e Press Esc key The screen of timer exit is displayed e Select Yes with the arrows then press OK ae exit In sleep mode e Press on off key to reactivate the instrument The waiting screen is displayed e Press Esc key The screen of timer exit is displayed e Select Yes with the arrows then press OK vn sa The programming is canceled and the ses instrument backs to the screen of intial l Yes measurement T 00 00 00 00 01s Man 32 Non Oui VI 4 3 Delayed mode Tim Data storage and audio files At the end of each measurement files of metrological data and audio files if the function is activated are stored on the SD card This is how it works Simple delayed mode 01 repetition storage is made at the end of the measurement The instrument stays activ
56. key among Man manual Tim timer I O with I O signal Timer and I O modes see page 51 il Info current time is displayed before launching measurement 00 00 00 00 O1s Man 1 2 V 3 2 Launch the measurement a 250 Hz 123 4 dB 110 090 ee Ex 080 als 070 a 050 030 010 l ACZ 63 250 1k 4k 16K 00 00 00 24 In manual mode oros NN to launch the measurement with elementary data storage according to the selected integration time 1s for example timer starts and indicates the duration ols Man 21 V 3 3 During measurement During measurement three screens give information about the ongoing measurement They are accessible with the scrolling knob key E1 itis the main screen it displays values and graphical representation spectrum type The different bars stand for e LAeq LCeq LZeq equivalent continuous levels of sound pressure A C and Z weighted e LXeq equivalent continuous levels of sound pressure filtered by octave bands from 31 5Hz to 8 kHz e Measurement duration in JJ HH MM SS Read values e Move the cursor in 1 with the arrows and select among DI global Max min e Move the cursor in 2 with the arrows and select with scrolling knob key the value of weighting or filter and read the result displayed in the box 3 A vertical line is moving on the screen and superimposes on the bar corresponding to the selected weighting or filter Do
57. measurement instrument with main features of a conventional and integrating averaging sound level meter and analyser with storage With its memory DB300 sound level meter stores measurement datasets Then they are transferred to a computer and processed through LDB23 software According to international standards sound level meter calculates and displays on its graphical backlight LCD screen values used for a fast and complete study of the noise environment To simplify and make nice its use 5 measurement modes have been preselected e Mode 1 conventional sound level meter and avereger integrating with storage e Mode 2 integrating averaging sound level meter A and C weighted e Mode 3 integrating averaging sound level meter A and C weighted and analyser by octave bands filters from 31 5Hz to 8 kHz with storage Mode 4 analyser sound level meter for the measurement according to the NR curves as per NF S 30 010 standard e Mode 5 Sound level meter calculator of two sound sources In the different modes in addition to measured values the sound level meter can display e results for a better definition of the acoustic environment Maximum and minimum values peak values statistics distribution of measured levels e indications required for the proper validation of the measurement Presence and percentage of overload input stages duration of the measurement e other information Battery autonomy rem
58. nce 0 38 pF Nominal gain 0 01 dB Bandwidth 3dB 3 100 k Hz Bandwidth with extensions 3 22k Hz from 3 to 10 m 3dB Noise A weighted lt 3 uV Size L Diam 87 mm Weight lt 55 gr XIII 4 A C Z weightings and free field response The frequency response of the whole microphone windscreen A C or Z weightings sound level meter is in compliance with standards in a given template according to the accuracy class of the instrument NF EN 61672 1 class 2 Plots types of free field sound level meter are given below dB 54 Free field response with A weighting Free field response with C weighting Free field response with Z weighting XIII 5 Filters by octave bands from 31 5 Hz to 8 kHz The sound level meter has filters to perform spectral analysis These filters are in accordance with standards in a given template according to the accuracy class of the instrument CEI 61260 class 2 Relative response type of the filter by octave band as per CEl61260 template class 2 standard XIII 6 Measured and displayed values e Sound pressure level A and C frequency weighted and temporally weighted according to times constants Slow Fast and Impulse Ex LAF e Maximum sound pressure level A and C frequency weighted and temporally weighted according to times constants Slow Fast and Impulse Ex LAFMax e Minimum sound pressure level A and C frequency weighted and temporally wei
59. ndices are L01 L10 L50 L90 L95 99 XIII 7 Metrology XIII 7 1 Main features DB300 2 sound level meter Conventional mode Integrator averager mode Electromagnetic compatibility CE marking As per 89 336 CEE guideline and product standards Standards NF EN 61672 1 2003 NF EN 60651 1994 1995 NF EN 61672 1 2003 NF EN 60804 2000 CEI 61260 1995 Accuracy class 2 Reference Pressure level 94dB Frequency 1000 Hz Caliber 30 137 dB Direction 0 microphone axis Measuring range A weighted 30 137 dB C weighted 35 137 dB Z weighted 35 137 dB Peak channel measuring range 83 140 dB Resolution 0 1 dB Sound referred to input Compatible with the linear range X frequency weightings A C Z Filters by octave bands 31 5Hz 63Hz 125Hz 250Hz 500Hz 1kHz 2 kHz 4 kHz 8 kHz Y frequency weightings Lente F Rapide S Impulse I Overload indicator min 140 5 dB Adjustable elementary integration duration of 1 16s 1 8s 1 4s 1 2 1s 2s 3s 5s 10s the LXeq for storage 15s 30s 60s Integration duration Start Stop max order unlimited LXN statistical indices Calculation based on LXY or LXeq DI stored data rounded up to the next dB on a dynamic of 107 dB Clock accuracy Better than 0 01 Reference environment 23 C 50 HR 1013 hPa Operati
60. ng environment From 10 C to 50 C 650 hPa at 1080 hPa from 25 to 90 HR Storage temperature From 0 C to 50 C Size L x x e 270 x 70 x 40 mm Weight battery include 335 gr Fixing Fixation on the back of the instrument for tripod XIII 8 Plugs and connections XIII 8 1 Removable preamplifier PR23 It is often indispensable to remove the preamplifier from the sound level meter to connect it on an extension The preamplifier is fixed on the sound level meter with a Push pull mechanism This mechanical protection avoids any unwanted removal of the preamplifier or of the extension To remove the preamplifier proceed as follows Do not turn or pull the body of the amplifier Take the black part between your thumb and forefinger and pull firmly To reintroduce the preamplifier put it in position in the plug with the red mark positioned toward the back on the housing Push in it A click confirms the proper connection Wiring of the input connection 7 points on sound level meter Signal 1 Signal 2 V power supply 24 Volts DC 3 Heating power supply Not active 4 Not connected Pie ern 5 Power supply ground wie 6 Not connected 7 Not connected Plug body linked to the ground 57 XIII 8 2 Plugs Located under the breastplate in soft rubber the different plugs and connections allow to e Communicate with external items I O interface e Load
61. ng of the daily duration of programming the instrument will correct automatically the date and time of the end of measurement The two last lines of the screen indicates That the memory capacity for the number of sessions is enough 999 max OK That a power adapter must be used In case of incompatibility KO is displayed instead of OK in this case empty the memory of the instrument lf the power adapter logo blinks it is imperative to use a power adapter When the logo stops blinking it means that the power adapter is connected DIFF JOUR REPET D but 15 05 09 15 Fin 16 05 06 30 Repet Sy M m KO Alim CT 31 VI 4 1 Delayed mode Tim waiting for measurement The principle of a free delayed measurement or of a repetitive daily delayed measurement requires a temporal management of the instrument e The programming has been prepared and validated e A screen displays the waiting mode This screen is displayed a few moments then it turns off e The instrument is in sleep mode to save battery capacity It is reacivated a few moments before the measurement e The measurement is performed data are stored the instrument activates its sleep mode until the following measurement and so on Screen details Number of remained programmed measurement here 1 01 Date and time of starting for the haa next measurement gt gt 27 06 2012 12 42 Current time gt gt 10 43 19 Important it
62. nge The sound level meter processes the sound pressure signal and displays simultaneously the following information on E1and E2 screens e LXY sound pressure levels weighted temporally e LXYmax and LXYmin maximum and minimum values of sound pressure level since the beginning of the measurement e LUpk maximum peak level of sound pressure e 09 16 50 current time LpK A LpK S 89 1 dB B 103 6 s a LAF 88 7 as x S x 30 50 70 90 110 130 A Info Integrating averaging mode starts only after pressing Las 614 l pictogram 78 6 aF l L A LAeq and LCeq values are integrated on 1 16s in conventional mode AF 55 2 E 88 7 i A for instantaneous information the timer remains at zero LAed es A ics alee LCeq Pe LCI 78 6 dB 00 00 05 E1 RAZ Inst E2 V 1 2 Possible selection for the measurement 1 Select the weighting frequency and the time constant in direct visualization on the analog indicator with hand LpK A For each time weighting the sound level meter proposes the measurement according to 3 c e time constants Fast F Slow S Impulse 1 Possible selections are ee A weighting LAF LAS LAI ao C weighting LCF LCS LCI e 552 Place the cursor with arrow key on the area 1 and select with scrolling knob identified e A s measurement criteria among the possibilities listed above NA Ge 2 The selection of the frequency weighting for the sound peak pressure level C or
63. nnonacnnnnnos 18 V 2 1 Setting to perform before a measurement ee ee ee ee e e 18 Viz 2 LAUNCH IMC ASUTCIN GN vcsicn dasa nd l settee idas 18 W279 DUn INCAS UEM IO 18 Vi2Z 4 SIOD Me ME E eT T OTT 19 pr o o al AELTER PTE L 20 V 3 Analyser integrating averaging with storage sound level meter unction see ee eee 21 V 3 1 Setting to perform before a measurement ee ee ee ee e e 21 L LAUNCH Mea SUENE ii 21 VSS DUNN Meas emne N ea eons A A ar doo allas 22 Vi 3 4 SIOD ING O IU e E e ld 23 RA AA E E E A E 23 V 4 Measurement of noise equipment NT mode sss ee eee eee 24 V 4 1 Setting to perform before a measurement ee ee ee ee e e 24 V42 EQUNCA Measure meni ia a A iodo 25 VAS D SU e e ob a 25 V 4 4 Stop the measureme Mses niesienia AEE E NE AAEE E EE EA tae AEEA 25 VAIE OO e A A E TAE E E TA 26 V o Calculate Wo Sound SOUNCES snina aaa iia iii di 27 V 5 1 Setting to perform before a measurement ee ee ee ee e e 27 V 5 2 Make calculation of two sound SOUrCSS ce ee ee e 27 V 6 Determine a sound SOUFCE AMONG k e TTT 27 V 6 1 TANIA US AAA 27 WD EEE OLERE E E A o a cada 28 VI Mode of measurement launching sssss esse sss s esse cesse sese 29 Ui EET n eT TTT 29 Ui ed MIMO GIAle MOA TTT 29 Wits Delayed modes Tieri a ere E satin sa oa passe E E 30 VI 4 Repetitive delayed mode MM a a a Neth eae 31 VI 4 1 Delayed mode Tim waiting for measurement eee eee ee ee ee 32 VI 4 2 Delayed mode Tim
64. nstrument Easy to use it requires a smaller learning and allows immediate management of data Main functions e Visualization and results of the different measurement mode e Zoom function for more detailed study of a period e Statistical distribution of data e Formatting and editing of measurement report e Data recovery and creation of text files LDB200 S02_2903 appareil12006 LEQ E M Fichier Imprimer Exporter Appareil Outils Fen tre Aide 8X X u 7 i ES 0 E A E Y Y f it Soci t Ouvrir Enregistrer Imprimer Exporter Appareil Calculette 51 52 Soci t Note g n rale Tableau des valeurs Evolution temporelle Distribution statistiques Configuration Vueglobale Mode Leg Stockage D part de mesure 29 03 2010 16 37 51 Fin de mesure 06 04 2010 10 04 11 Dur e de la mesure 7J 17 26 30 Pond ration Leg A Pond ration cr te C Dur e d int gration 10 s Mode LegStockage LAeg max 84 8 dB iea p CABINET DE CONTROLE LAeg min 37 7 dB tapport de campagne apa LAeg T 58 4 dB l r LEAT 116 7 dB Hy LCpk 120 6 dB Wh T Surcharge 0 00 Dur e de la mesure 7J 17 26 30 138588853338 RB BE H 21 16 51 06 49 51 16 22 51 01 55 51 11 28 51 21 01 51 06 34 51 16 07 51 01 40 51 11 13 51 20 46 51 06 19 51 15 52 51 01 25 51 10 58 51 2
65. ogging time e Min minimum equivalent continuous levels weighted and filtered reached since the beginning of the measurement base DI logging time 22 2 3 250 Hz 123 4 dB 110 090 ds E a 080 S S 070 050 030 010 l A CZ 63 250 1k 4k 16K 00 00 00 24 global E1 1 LCpkmax 99 5 dB A LCeq 31 4 dB LZeq 98 7 dB 16Hz dB 31 5 Hz 98 7 dB 63 Hz 31 4 dB 125 Hz 99 5 dB 250 Hz 98 7 dB 500 Hz 31 4 dB 1 kHz 99 5 dB 2 kHz 98 7 dB 4 kHz 31 4 dB 8 kHz 31 4 dB 16kHz dB E3 this screen remains the general format of the measurement session e Date of measurement start e Date of measurement end not entered because measurement is still ongoing e Measurement time not entered because measurement is still ongoing e Measurement mode 1 1 oct Mode e Filters by octave bands from 31 5Hz to 8kHz E e LXeq logging time DI e Frequency weighting of the peak pressure level Lpk e Audio recording Audio V 3 4 Stop the measurement e Press to stop the measurement e Validate with OK Note When STOP is displayed it is possible to press ds key to back to measurement screens and keep going Note It is not possible to stop the measurement as long as the first logging time ex DI 60 will be inoperative V 3 5 Store data At the end of the measurement in manual mode a screen of all results is displayed It is then possible to 15 05 EP
66. rage is displayed to validate or reject the measurement NR 75 A i 9 31 5 63 250 1k 4k 8k 00 00 00 30 mom oe V 4 5 Store data At the end of the measurement in manual mode a screen of all results is displayed It is then possible to e Accept measurements and store them move the cursor on Sto and press once on OK key to confirm A banner displays the storage phase NR A NR 75 ZA oy RE 2o 00 ET STO S11 Oo m E pe ae a 00 00 00 30 E1 NR NR di ae Ongoing measurement Results screen Storage e Reject measurements and not store them move the cursor on RST and press twice on OK key to confirm A banner displays the phase of suppression of data NR 75 A NR 75 A 110 SE a ff 7 2 RAZ RAZ 080 080 S11 S11 00 00 00 30 00 00 00 30 Results screen RST active Deletion 26 V 5 Calculate two sound sources The sound level meter processes the acoustic signal of several sound sources over a time left to the free initiative of the operator The measured value here is the equivalent continuous level over this time V 5 1 Settings to perform before measurement 2 1 Select S1 S2 mode move the cursor with arrow keys on the icon then press OK 2 Select the frequency weighting 1 52 ab Possible choices are A frequency weightin
67. ressure for L LpK With scrolling knob key go to E2 results screen LUpk level of maximum peak of sound pressure on the measurement time LAeq equivalent continuous level of sound pressure A weighted on the total measurement duration LCeq equivalent continuous level of sound pressure C weighted on the total measurement duration LAE A weighted sound exposure LCE C weighted sound exposure T measurement duration in JJ HH MM SS percentage of saturation of the input stage LAF LAS LAI max or min levels of sound pressure A weighted according to the time constants Fast F Slow S Impulse 1 LCF LCS LCI max or min levels of sound pressure C weighted according to the time constants Fast F Slow S Impulse 1 gt Select Max or Min in 1 with the scrolling knob key to go from maximum values to minimum values gt Press Esc key to quit this file and back to main screen of files selection 15 05 13 15 45 15 05 13 15 45 LpkC 99 5 dB LpkC 99 5 dB 7 LAeq 98 7 dB LAeq 98 7 dB LCeq 31 4 dB LCeq 31 4 dB LAE 67 4 dB LAE 67 4 dB D part 15 05 09 15 D part 15 05 09 15 LCE 78 5 dB LCE 78 5 dB Fin 18 05 23 00 Fin 18 05 23 00 T 00 01 30 T 00 01 30 Dur e 04 00 30 Dur e 04 00 30 A 02 A 02 AN LAF 99 5 dB LAF 99 5 dB Y Esc Mode L Leq Mode L Leq LAS 98 7 dB LAS 98 7 dB Pond A C Pond A C LAI 31 4 dB LAI 31 4 dB Cte F S I Cte F S I A LCF 67
68. s The back of the instrument contains a battery compartment door a threaded hole for mounting on a tripod a location for the nameplate and a location for the calibration label lll 2 Presentation of the screen keyboard group E 89 1 The screen keyboard group gives to the instrument a modern ergonomy lt mainly participates to the quick familiarization of the sound level meter A A press a touch or a very light finger slipped on keyboard icon is enough to trigger the corresponding 7 action of the sensitive key a 55 2 The measurement configuration is made by moving a reversed video cursor in reserved areas then S by choosing the concerned parameter or function pee For instance e Time weighting and time constant selection A or C and Slow Fast or Impulse e Selection of measurement mode Reserved areas appear according to two 3D type formats e Inner shadow to the frame simulates a shifted back area in which parameters can be modified or displayed measurement results e External shadow to the frame simulates a shifted forward area in which different propositions of the menu can be chosen to go to an other configuration or validation screen RA A push on each arrow moves the cursor on the horizontal left right axis A push on each arrow moves the cursor on the vertical up down axis Scrolling knob key increases or decreases suggestions in the area according the principle of front or back circular permutat
69. selection of reading values S I 00 00 00 24 ols Man 52 XIII Technical features XIII 1 Microphone The instrument is equipped with an electret microphone with an integrated preamplifier of standardized diameter of inch Fixed at the top of the sound level meter it gives to the group microphone and housing free field features compatible with standards XIII 1 1 Sheet e Brand KIMO AME23 e Type condenser with electret e External diameter of the grid 13 2 mm inch e Nominal sensitivity for preamplifier output 20mV Pa e Equivalent capacity about 10pF XIII 1 2 Normal frequency response in free field Free field frequency response type template class 2 NF EN 61672 1 HZ 10 00 XIII2 Windscreen B DB23 windscreen creates modifications of free field response that comes in addition to initial features of the microphone on the housing The whole stays compliant to requirements class 2 reference standard So when using the windscreen there is no need to take into account a correction term free field dB B DB23 free field response template class 2 NF EN 61672 1 99 XIII 3 Preamplifier PR23 The preamplifier is an essential system to adapt the microphonic sensor to the input electronic of the sound level meter Features Preamplifier PR23 Unit Supply voltage 24 V Supply current lt 1 mA Input resistance gt 30 GO Input capacita
70. sing the instrument in analyser mode for the measurement of noise equipment in correspondence with NR curves as per NF S 30 010 Measurement start in Tim mode only works for a T free duration programming and not for predefined durations 3 5 10 15 30 60s When 0 VDC electrical voltage of control is reached in I O mode or generally with the delayed programming Tim e The measurement stops after at least one elementary logging time from 1s to 60s The current last elementary logging time is not taking into account in data The instrument saves metrologogical and audio data if activated at the end of the session Every other start linked to a back of 5 VDC of control voltage in I O mode or to a Tim programming is performed after the end of storage see page 33 VI 2 Immediate mode e Press EN key to launch the measurement 29 VI 3 Delayed Tim mode It is possible to programme the beginning and the end of the measurement date time of a free duration that can exceed several days For example preparing the instrument for measurement during the night LpK A E A 63 Hz 63 4 dB NR o eee C 89 1 dB 0 110 110 090 hoes TA 090 080 aa 080 070 070 050 050 030 030 010 l 010 ih A CZ 63 250 1k 4k 16K 31 55 63 250 1k 4k 8k 1 8s 1 2s 1 85 00 00 00 20 e Select icon Tim at the bottom right of the screen when set the laca the instrument before the measurement ceq e Press OK to go the programming scre
71. the battery and or power supply e Access to the micro SD card S2 I O 1 In Input allows the E launching of a measurement I O 1 Out Output detection of levels Micro SD card location _ Monitoring light of the state of battery charge Mini USB connector for data transfer load battery mains voltage adaptor AS C SZ SL Not used I O 2 In Input not used I O 2 Out Output DC 0 10V XIII 8 3 I O interface I O 1 In input start stop control for measurement TTL level maximal 5V input impedance gt 15 KQ jack 2 5 mm diameter J measurement a Measurement Measurement start stop I O 1 Out output to activate alarm maintains high state after detecting a LX or planned LXeq level Variable time selected from 1s to 10s by 1s steps TTL level 3 3 V input impedance lt 100 Q jack 2 5 mm diameter J a GND Ground THM H I O 2 Out DC output 0 10 Volts input impedance lt 100 Q jack 2 5 mm diameter L Dynamic range 0 137dB ae Step 0 073 mV dB ae Accuracy 0 5 dB Sar E GND Ground a Not connected XIII 8 4 Transfer plug load mains voltage adaptor This plug is for data transfer battery load optional or power It s a mini USB format e Data transfer USB mode e Data Format proprietary e Mains supply charger type universal USB format ref AS 123 PRI 100V
72. the same to read the different values according to the selection in 1 DI global Max min e DI equivalent continuous levels weighted and filtered for each DI logging time 01 s for example e Global equivalent continuous levels weighted and filtered of the ongoing measurement e Max maximum equivalent continuous levels weighted and filtered reached since the beginning of the measurement base DI logging time e Min minimum equivalent continuous levels weighted and filtered reached since the beginning of the measurement base DI logging time These different values are shown as e An horizontal line for the maximum level e A full colored bar for the global level e An empty bar for the minimum level a 1234 Gp Max 110 090 En p ES 080 a 07 3 y 050 030 la mi 10 A e 2 a AE MR 00 00 00 24 global global El E2 this screen displays the results of current values that will be stored at the end of the measurement e Move the cursor in 1 with the arrows and select with the scrolling knob key among DI global Max min Read the different values according to the selection e DI equivalent continuous levels weighted and filtered for each DI logging time 01 s for example e Global equivalent continuous levels weighted and filtered of the ongoing measurement e Max maximum equivalent continuous levels weighted and filtered reached since the beginning of the measurement base DI l
73. tinuous levels of sound pressure A C and Z weighted on the duration of the ongoing measurement e LXeq equivalent continuous levels of sound pressure on the duration of the ongoing measurement filtered by octave bands from 31 5Hz to 8 kHz E3 this screen reminds the general format of the measurement session e Date of measurement start e Date of measurement end not entered because measurement is still ongoing e Measurement time not entered because measurement is still ongoing e NR measurement mode Mode e Filters by octave bands from 31 5Hz to 8kHz F e LXeq logging time DI e Frequency weighting of the peak pressure level Lpk V 4 4 Stop the measurement e Press U to stop the measurement e Validate with OK Note When STOP is displayed it is possible to press e key to back to measurement screens and keep going NR 63 250 1k 4k 8k 00 00 00 00 T Man 250 1k 4k 8k 00 00 00 05 E1 LCpkmax LCeq LZeq 31 5 Hz 63 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz 8 kHz 995 dB A 98 7 dB 31 4 dB 98 7 dB 98 7 dB 31 4 dB 99 5 dB 98 7 dB 31 4 dB 99 5 dB 98 7 dB 31 4 dB 31 4 dB 15 05 D part Fin Dur e Mode F DI Lpk 13 15 45 15 05 09 15 NR 31 5Hz 8kHz T C 25 When a predefined duration from 3s to 60s has been selected the measurement stops automatically at the end of this duration screen of data sto
74. to MENU main screen 41 X Audio recording function When studying a measurement and after the visualization of the temporal evolution with the software some results can be surprising and can raise questions e What is the sound source of the this level In order to help you DB300 instrument has a Audio Recording function that is automatically activated when a previously set threshold is exceeded This detection on threshold is about e The equivalent continuous level A weighted on an elementary integration time of 1 second LAeq 1s or e The maximum peak pressure level C or Z weighted according to the programmed weighting usually C LCpk This function is only available with the two following modes l Integrating averaging sound level meter with storage A and C weightings Integrating averaging sound level meter with storage A C and Z weightings and analyser by filters of octave bands from 31 5Hz to 8kHz The principle of recording after a threshold detection suggests that sound source that caused the threshold exceeding can become inactive after the detection Therefore DB300 instrument systematically performs a sliding recording of Tgl duration 4 s that is retained after detection of an exceeding e The recording keeps going on the total duration of the exceeding and after sub overshoot of the threshold and on the same Tgl duration previously used e This process allows an Audio recording of the soun
75. to the initiative of the user with data storage for the determination of the NR index e Onapredefined measurement duration ranging from 3 s to 60 s with data storage for the determination of the NR index Measured and stared data at the end of the measurement e LAeq T equivalent continuous level of sound pressure on the T duration e LCeq T equivalent continuous level of sound pressure on the T duration e LXeq T equivalent continuous level of sound pressure on the T duration filtered by octave bands from 31 5Hz to 8 kHz e LUpk maximum peak level of sound pressure on the T duration e Measurement duration in JJ HH MM SS Measurement duration e T left to the initiative of the user according to the manual start stop mode with the keyboard e Predefined T to select between the durations 3s 5s 10s 15s 30s 60s In order to have permanent control of the sound pressure level before the launch of measurement the sound level meter calculates and displays the equivalent continuous level of acoustic pressure on a logging time of 1 8 s MOTE Brie V 4 1 Settings to perform before a measurement z preen AA 1 Select the T mode or the predefined mode Move the cursor in 1 and select with the scrolling knob key T or 3s 5s 10s 15s 30s 60s e T mode by selecting T the measurement begins with a manual start S Data are stored at he end of the measurement with a manual stop Ne een eae ae ae 00 00 00 00 e
76. to the mode the different frequency and temporal weightings or filters the logging times date and duration e Scroll stored files with the scrolling knob key Each file is identified by an order number type S001 and a file name format 001_1811 L23 This file name will be displayed uploading to a computer When the file has be identified by its identification number press OK key to view the different results screens LECTURE 15 05 13 15 45 15 05 13 15 45 CONFIGURATION l PROG MESURE D part 15 05 09 15 Depart ates Gods Fin 18 05 23 00 A Fin 18 05 23 00 COMMENTAIRE Dur e 04 00 30 57 Dur e 04 00 30 56 gt Ve gt gt lel gt Mode L Leq Mode 1 1 oct R LECTURE Pond AC y F 31 5Hz 8kHz Lpk C Lpk C AUTONOMIE Audio a INSTRUMENT APROPOS S01 S01_0410 L23 S02 S02_0410 L23 Menu d 7 st f n 1 stored file 2 stored file Press Esc key to quit this file and back to file selection main screen Press Esc another time to back to main screen of the instrument 34 VII 2 Read data of the file VII 2 1 L Leg mode file When the file has been identified by its identification number gt Press OK to go to E1 screen which remains the measurement configuration e Date of measurement start e Date of measurement end e Measurement time expressed in DD HH MM SS e Measurement mode L Leq e Frequency weighting for L and Leq Weig e Time weighting for L Cst e Frequency weighting of the level of peak p
77. us level of sound pressure A weighted on the whole measurement duration e LAE level of noise exposure A weighted e D measurement duration in JJ HH MM SS e saturation percentage of the input stage e Statistics indices L01 L10 L50 L90 L95 They are calculated from stored samples To access to the same results for the C weighting e Move the cursor in 1 then select C with the scrolling knob key E3 this screen remains the general format of the measurement session e Date of measurement start e Date of measurement end not entered because measurement is still ongoing e Measurement time not entered because measurement is still ongoing e Measurement mode Leq St e Aand C frequency weightings for Leq Pond e Elementary integration time for Leq in second DI e Frequency weighting of the level of pressure peak Lpk e Audio recording on threshold Audio V 2 4 Stop the measurement e Stop the measurement pressing U e Press OK LCpk LAeqM LAeqm L01 L10 L50 L90 L95 15 05 D part Fin D SR 38 26 G A al 99 5 dB 98 7 dB 31 4 dB 67 4 dB 78 5 dB 00 01 30 02 95 4 dB 75 9 dB 68 1 dB 45 6 dB 33 2 dB 13 15 45 15 05 09 15 00 00 06 52 Leq St A C 1s 0 STOP S11 Note When STOP is displayed it is possible to press key to back to measurement screens and keep going Note It is not possible to stop the measurement as long as the first lo
78. ut stage e Statistical indices L01 L10 L50 L90 L95 gt Select A or C in 1 with the scrolling knob key to go from A weighted values to C weighted values 15 05 13 15 45 15 05 13 15 45 LpkC 99 5 dB LpkC 99 5 dB 15 05 13 15 45 E LAeqmax 98 7 dB LAeqmax 98 7 dB LAeqmin 31 4 dB LAeqmin 31 4 dB l D part 15 05 09 15 D part 15 05 09 15 D part 15 05 09 15 Fin 18 05 10 30 Fin 18 05 10 30 LAeq 67 4 dB LAeq 67 4 dB Fin l 18 05 10 30 Dur e 00 04 00 Dur e 00 04 00 LEA 78 5 dB LEA 78 5 dB Dur e 00 04 00 00 01 30 1 00 01 30 Mode Leq stock OK Mode Leq stock d me 95 4 dB L01 95 4 dB p is L10 75 9 dB L10 75 9 dB X L50 68 1 dB 68 1 dB Lpk L90 45 6 dB 45 6 dB L95 33 2 dB 33 2 dB Leq stock A C 1s C 02 A 02 P a el SK lt ar gt 588 1 1 Stored file E1 screen Stored file E2 screen dBA E2 screen dBC 508 08_0410 L23 gt Press Esc key to quit this file and back to main screen of files selection 36 VII 2 3 1 1 oct file mode When the file has been identified by its identification number gt Press OK to go to E1 screen which remains the measurement configuration e Date of measurement start e Date of measurement end e Measurement time expressed in DD HH MM SS e Measurement mode 1 1 oct Mode e Filters by octave bands from 31 5Hz to 8kHz F e Elementary integration time for LXeq DI e Frequency weighting of the peak pressure
79. y to quit this file and back to main screen of files selection 15 05 13 15 45 NR 13 LCpkmax 99 5 dB A E LAeq 98 7 dB f LCeq 31 4 dB 110 LZeq 98 7 dB D part 15 05 09 15 Fin 18 05 23 00 090 31 5 Hz 98 7 dB Dur e 94 00 30 a 63 Hz 86 8 dB 125 Hz 99 5 dB Mode NR K 250 Hz 98 7 dB F 31 5Hz 8kHz 050 500 Hz 71 4 dB gt 5 le 1 kHz 99 5 dB Lok A A 2 kHz 98 7 dB p C 010 4 kHz 61 4 dB 31 5 63 250 1k 4k 8k 8 kHz 414 dB 00 00 00 30 s09 El y NR 2 Vv s09 E3 E1 screen E2 screen E3 screen 15 05 D part Fin Dur e Mode F DI Lpk s09 13 15 45 15 05 09 15 18 05 23 00 04 00 30 NR 31 5Hz 8kHz T C S09_0410 L23 Stored file 39 VII 2 5 S1 S2 mode file When the file has been identified by its identification number you access to the main single screen of results It shows e 1 S2 equivalent continuous level of the two sound sources e 2 equivalent continuous level of 2 sound source e 1 equivalent continuous level of 1 sound source e The frequency weighting of the equivalent continuous level e The measurement duration for the calculation of the equivalent continuous level gt Press Esc key to quit this file and back to main screen of files selection RESULTAT CONFIGURATION B conriGURATION s1 52 048 1 PROG MESURE COMMENTAIRE S2 046 1 dB N 1 O Y esc st 043 9 wees ny AUTONOMIE 00 00 00 04 INSTRUMENT S01 001_1901 L23 APROPOS

III – Presentation of the sound level meter

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III &ndash; Presentation of the sound level meter

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III – Presentation of the sound level meter