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Manual - Delta Ohm S.r.l.

1. gt LAeq 00 05 38 5 f Maximum Level Scale Factor Wideband Level Minimum Level Sampling Interval Probability Fig 6 Description of the distribution of probabilities display The figure shows the distribution of probabilities of the A weighted equivalent level with a 0 125s sampling interval The vertical axis shows the sound levels in decibels and the probabilities are on the horizontal axis The display shows the sampling interval in the left lower corner and the chosen measurement parameter for the statistical analysis in the first line to the left of the status indicator and the possi ble overload indicator The amplitude of the vertical scale of the displayed graph corresponds to 5 divisions The am plitude of each division is called scale factor of the graph and appears in the middle of the vertical axis This parameter is selectable in real time among 20dB 10dB or 5dB by division These corre spond to the 2dB 1dB or 0 5dB classes in the graph The scale factor can be set using the RIGHT zoom and LEFT zoom keys Use the UP and DOWN arrows to set the graph full scale with steps equal to the selected scale fac tor In this way the graph can be shifted UP or DOWN according to the pressed key An analogue bar indicator on the display right side provides the non weighted instantaneous level of the input sound pressure level as for the SLM mode bar The parameter chosen for statistical analysis can be chan
2. Porta di comunicazione COMI Y Porta di comunicazione COMZ F R RR R R 23 Schede di rete Schede video 8 Schermi gt Tastiere A A When USB cable is unplugged the above items will disappear and they will appear again as soon as the instrument is plugged to USB port In the documentation supplied with the Noise Studio CDRom it s available a detailed version in cluding images of the USB driver management guide HD2010 MC MEMORY CARD READER The memory card reader HD2010 MC can be used on the sound level meters provided with M12 serial connection If they aren t provided with M12 input they can be modified in order to be able to use the memory card reader HD2010 MC DESCRIPTION OF THE INTERFACE FOR MEMORY CARD HD2010 MC The reader HD2010 MC allows to expand the storage capacity of the sound level meter By em ploying SD type or MMC card type it is possible to record for example a sound level profile con tinuously for several months In addition it is possible to download data from the internal memory of the sound level meter to the card This function can turn very useful when the effected measure ments need to be downloaded without moving the device or without using a notebook The maximum storage capacity of the card is 2GB the formatting is FAT 16 type The reader is powered by the sound level meter and doesn t require any external power supply PREPARATION OF A NEW MEMORY CARD Ev
3. 94 the national D L 194 2005 and D M 16 03 1998 and EU legislation regarding the acoustic pollution and the mapping of the territory NS4 Monitor module Acoustic monitoring and PC remote control Programmed data acquisi tion events identification and synchronized audio recording ACCESSORIES AND SPARE PARTS UC52 1 Type 1 Free Field prepolarized condenser microphone UC52 Type 2 Free Field prepolarized condenser microphone HD WME outdoor microphone weather protection Includes HD WME3 stainless steel support for preamplifier windshield HD SAV3 rain protection HD WME2 anti bird spike HD WMEI HD WME anti bird spike for HD WME weather protection HD WME2 rain protection for HD WME HD SAV3 windshield for HD WME weather protection HD SAV windshield for 2 microphones BAT 40 Spare battery pack for HD40 1 printer RCT 4 rolls of thermal paper 57 mm width and 32 mm diameter HD2010PNE2 Microphone preamplifier equipped with CTC device for electrical calibration and driver for cable up to 10 m HD2010PNE2W Heated preamplifier for HD WME outdoor microphone unit It is equipped with CTC device for electrical calibration and driver for cable up to 10 m 5 m connection cable 10 m on request CPA 5 5 m extension cable for HD2010PNE2 85 WHAT SHALLIDOIF This chapter deals with the step by step description on how to carry out the most recurrent measurements in the acoustic field with the H
4. EVN TRIGGER MIC CORR WND SHL CORR EVN _ PRINT The parameters that can be displayed in SLM mode are selectable among the following ones Parameter Attribute Lpk Lpkmx Leqs Leq LFp LSp LIp LFmx LSmx LImx LFmn LSmn LImn Leql LE Lep d Dose Dose d Ll 2 L3 L4 OL Z or C Z or C Z CorA Z CorA Z CorA Z CorA Z CorA Z CorA Z CorA Z CorA Z CorA Z CorA PARRA AAA N O gt Description Instantaneous peak level Z or C weighted Peak maximum level Short equivalent level Z C or A weighted Equivalent level FAST sound pressure level SLOW sound pressure level IMPULSE sound pressure level FAST maximum sound pressure level SLOW maximum sound pressure level IMPULSE maximum sound pressure level FAST minimum sound pressure level SLOW minimum sound pressure level IMPULSE minimum sound pressure level Equivalent sound pressure level with Impulse time constant A weighted exposure level SEL Daily personal exposure level A weighted EEC 86 188 A weighted dose A weighted daily dose Percentile level calculated on FAST pressure level A weighted Percentile level Percentile level Percentile level Time percentage in which an overload has occurred The attribute of parameters that can be displayed in SLM mode indicates the respective frequency weighting ae oe KEY GROUP The following table shows the command list of the KEY group GROUP STATUS The following table show
5. tion and recording cycle will start automatically after all parameters are reset Press REC while the instrument is in STOP mode to disable the Auto Store function and jump back to the continuous integration mode The automatic recording can be also activated from the corresponding menu item MENU gt gt Re cording gt gt Auto Store If the Auto Store function is enabled in single integration mode the parameters displayed on the SLM screen will be stored when the set integration time is over Then the capture will be auto matically stopped When the parameter MENU gt gt General gt gt Measurement gt gt Integr Mode is set to MULT mode the symbol Tint in the SLM screen starts to blink then the acquisition is repeated over time intervals corresponding to the set integration time each time interval is automatically pre 30 ceded by the reset to zero of integrated levels ref to chapter DESCRIPTION OF THE DIFFERENT INTEGRATION MODES This integration mode together with Auto Store function enables to record over a time pe riod equal to the integration time the parameters available on the SLM mode screen The integra tion time equal to recording time period is programmable on the SLM mode screen or alterna tively using the specific parameter on the menu MENU gt gt General gt gt Measurements gt gt Integra tion Interval CONTINUOUS RECORDING If the Advanced Data Logger option
6. Data Logger gt gt Report gt gt Parameters gt gt ON and STATISTICAL ANALYSIS Menu gt gt Data Logger gt gt Report gt gt Statistics gt gt ON 6 7 10 481 2988 byte hour gt gt maximum duration 4 MB 2988 58 days An additional 4MB expansion memory is available as an option doubling recording capacity 101 A3 THE SOUND The sound is a variation of pressure audible by the human ear Its propagation starting from the source occurs in the form of waves and is thus subject to all the phenomena typical of the waves such as refraction and diffraction The propagation speed depends on the medium and in the air at ambient temperature it equals to about 344 m s The ear sensitivity is quite high and able to perceive pressure variations equal to about 20 uPa corresponding to 5 parts a milliard of the atmospheric pressure This incredible sensitivity 1s joint to the capacity to bear pressure variations more than one million times higher For conven lence it was decided to indicate the sound pressure level in decibel rather than pressure in Pascal in order to reduce the numeric extension The decibel dB symbol is defined by X dB 20 108 0 x 0 where X 1s the measured quantity Xo 1s the reference value of the measurement to which corresponds 0 dB In acoustics the pressure is the measured quantity and the reference value corresponds to 20 uPa the minimum audible pressure Therefore the sound level
7. Li 1 1 4 i l m nn percentile with nn 1 99 A A weighting WEIGH WEIGH PARAMETER ABBREV DEFINITION FREQ TEMP L LE Exposure level throughout the measure N AR dBA ment time SEL Dose Dose percentage with programmable ex 0 Dose 74 change rate threshold level and criteria A Dose d Daily estimated dose with programmable 0 gt Leql A weighted equivalent continuous level LAleq with Impulse time constant F Other WEIGH WEIGH PARAMETER ABBREV DEFINITION FREQ ni Overload OL Percentage of the measurement time in which an overload occurs The maximum reached level every 0 5s is displayed It is possible to program up to 4 different percentile levels 98 ACOUSTIC LEVELS GRAPHIC DISPLAY Time Profile with Advanced Data Logger option Wideband Levels WEIGH WEIGH PARAMETER ABBREV DEFINITION FREO TEMP L LFmx Sound pressure maximum level SPL max A F ee dBA SPL max Statistical Analysis E WEIGH WEIGH PARAMETER ABBREV DEFINITION FRE REQ TMP LXpk Peak level level X Z EST Equivalent Tevel o CR LXFp Sound pressure level with FAST time con ACOUSTIC LEVELS THAT CAN BE STORED WITH ADVANCED DATA LOGGER OPTION Measurement group acoustic Levels All the levels that can be displayed described above related to the SLM and PROFILE Report group acoustic levels 5 selected parameters WEIGH WEIGH PARAMETER ABBREV DEFINITION FREO
8. TEMP Leg Lt Sound pressure maximum level SPL max X Z C A Y F I Sound pressure minimum level SPL min X Z C A Y F S I F a 4 nn percentile with nn 1 99 Lan nn LegI A weighted equivalent continuous level LAleq with Impulse time constant A 3 Statistical analysis on a selected parameter among the following WEIGH WEIGH PARAMETER ABBREV DEFINITION FREO TEMP Leq E pala Sound pressure maximum level SPL max X Z C A If the option Advanced Analyser is not activated the statistic analysis is calculated on the A weighted sound pressure with FAST time constant It is possible to program up to 4 different percentile levels 99 PARAMETER ABBREV DEFINITION Event group acoustic descriptors with Advanced Data Logger option 5 selected parameters PARAMETER ABBREV DEFINITION WEIGH FREO o L 21 Equivalent conti level X Z C A Xeq JBX quivalent continuous leve Z C i Sound pressure maximum level SPLmax X Z C A Y F S I Sound pressure minimum level SPL min X Z C A Y F S I LAI sa A weighted equivalent continuous level vi dBA with Impulse time constant Statistical analysis on a selected parameter PARAMETER ABBREV DEFINITION WEIGH FREQ pie L med Equivalent continuous level X Z C A a dBX LFp Sound pressure level with FAST time con X Z C A dBX stant SPLrasr 100 A2 MEMORY CAPACITY DURING THE LOGGING FUNCTION With the supplied 4 MB memory you can
9. e Immunity to conduced disturbances EN61000 4 6 e Electromagnetic interference Conduced emissions EN55022 2007 class B e Electromagnetic interference Radiated emissions IEC CISPR 22 class B ITALIAN LAWS e Noise in working environment D L 81 2008 UNI 9432 2011 ISO9612 11 and Directive 2008 46 CE e Acoustical climate assessment and monitoring Advanced Data Logger option with sound events capture Advanced Data Logger option e Noise of entertainment dancing spaces D P C M 215 del 16 04 99 e Noise emission from machines D L 262 del 04 09 2002 Directive 2000 14 CE and 2005 88 CE z QI ORDERING CODES HD2010UC kit 1 type 1 integrating sound level meter kit with 4MB memory The kit includes the HD2010UC class 1 integrating sound level meter HD2010PNE2 pream plifier UC52 1 free field microphone microphone extension cable CPA 5 RS232 null modem serial cable for connection of COM ports HD2110 RS or USB HD2110 USB HD SAV windshield NoiseStudio PC software basic version plastic carrying case instruc tion manual The kit includes Calibration certification according to IEC 60651 and IEC 60804 of the measurement chain including sound level meter preamplifier HD2010PNE2 and microphone HD2010UC KitlE type 1 integrating sound level meter with outdoor weather protected preampli fier and microphone Suitable for outdoor measurements e Microphonic outdoor protection HD WME e Heated preamplifie
10. gt Input Output gt gt Serial device set up respectively on RS232 or USB respectively Ifyou use a USB interface check that the driver is correctly installed If you use a Noise Studio program disable the AutoDetect function Menu Option gt gt Port Settings and set the connection directly to the COM port to which the instrument is connected with the same baud rate of the sound level meter Menu gt gt Instrument gt gt In put Output gt gt Baud Rate It is not possible to activate continuous recording By pressing REC and RUN the instrument starts measurements without recording The instrument does not have available memory for additional data Download the data and or erase the memory The Advanced Data Logger option is not installed 9 KEYBOARD DESCRIPTION HOLD key The HOLD key can be used to temporarily suspend the display update while the instrument contin ues making the requested measurements A H in the left corner at the top shows that the display is in this phase Press the key again to go back to standard measurement While the instrument is in HOLD mode you can jump from a screen page to the other activate the cursors on the graphic pages print and store data Recording and the Monitor function are not affected by the HOLD Status O ON OFF key To switch on or off the instrument press the ON OFF key for at least one second Upon the power on the instrument shows for a few seco
11. meter Drifts Temperature 0 3 dB over the range 10 50 C with correction for microphone drift acti vated Relative humidity 0 3 dB over the range 25 90 RH not condensing Static pressure 0 3 dB over the range 65 108kPa SI R ELECTRICAL CHARACTERISTICS Pre heating time Lower than 10 seconds Power Supply Batteries 4 alkaline or rechargeable AA 1 5V internal batteries The sound level meter does not have a battery charger Autonomy gt 12 hours in RUN mode with alkaline good quality batteries Amounting to 8 hours when using the outdoor microphone unit HD WME fitted with heated preamplifier External batteries It 1s possible to connect external batteries to the sound level meter through the male connector for external power supply 5 5mm socket The positive pole power supply must be connected to the central pin The battery should supply 9 12 V at about 200mA h The maximum limit for external power supply is 15V Mains mains adapter with 9 12Vdc 300mA continuous voltage Switch off selectable auto power off When battery voltage falls below 3 9V the sound level meter cannot perform any measurement However it is possible to access and download the data in the internal memory Under 3 5V the instrument will automatically shut off Logged data and configuration parameter are maintained even without power supply Input maximum levels The maximum tolerable sound level with UC52 microphon
12. 1000mA VTRAP tripod max height 1550mm VTRAP H4 tripod max height 4m HD2110 SA support to fix the preamplifier to the tripod HD2110RS RS232 serial cable null modem with DB9 standard connector HD2110USB USB cable with A type connector HD40 1 the kit includes 24 column portable thermal printer serial interface 57mm paper width four NiMH 1 2V rechargeable batteries SWD10 power supply instruction manual 5 thermal paper rolls HD2010MC module for datalogging and data download to MMC and SD type memory cards One 1 GB SD card 1s included Post processing software modules CH20 Hardware key for PC with Windows operating system When connected to USB port it enables the use of the Noise Studio software modules NS1 Workers Protection module Analysis of the noise and vibrations exposure in the work place in compliance with D L 81 2008 UNI 9432 2011 and ISO 9612 2009 norms Calcula tion of the exposure levels and related uncertainties and evaluation of the individual protec tion devices effectiveness of the noise sources pulse index and of the presence of the DC shift phenomenon in the hand arm transmitted vibrations analysis NS2A Acoustic Pollution module Acoustic climate analysis on a daily weekly and annual basis including road railway and airport noise The software performs statistical and spectral analy ses and automatically identifies noisy events The analyses are performed in compliance with
13. 2003 01 01 10 00 ACOUSTIC CALIBRATION Last 2003 01 01 10 00 Calibr level 94 0dB Calibr level 94 0dB n 7 ALeq H dBC OL ALeq ic 5 aBC Confirm calibration me T Waiting for electric calibration 6 At the end if the values of the electrical calibration are acceptable press YES to confirm the new calibration LEFT arrow of the keypad at this point press NO if you want to cancel the whole calibration RIGHT arrow of the keypad 7 Finally the microphone polarization check is carried out Wait until Take out the preampli fier from the calibrator appears 52 ACOUSTIC CALIBRATION Last 2003 01 01 10 00 Calibr level 94 0dB ACOUSTIC CALIBRATION Last 2003 01 01 10 00 Calibr level 94 0dB gt Ds LILI ABC Leg J5 l LILI ABC Take off the calibrator ALeq Checking microphone polarization 8 Take out the preamplifier from the calibrator and press EXIT 9 The procedure is over If calibration constants were incompatible with a correct working of the instrument calibration would fail and the message Calibration failed Consult the manual would appear In this case re fer to Troubleshooting page 90 and if necessary contact our service department 93 MICROPHONE REPLACEMENT The 2010UC sound level meter is calibrated in the factory in conjunction with the micro phone If the microphone capsule sensitivity deviates too much from factory calibration the s
14. FAST time constant are carried out the instantaneous sound level will be strongly affected by the pressure trend in the last octave of second while it will not be af fected by what happened more than one second before The sound level with a SLOW time constant will strongly depend instead on the trend of pressure in the last second while it will not be affected by sound events occurred more than 10 sec onds before We can say that the sound level with a SLOW constant is approximately an average of the instantaneous levels of the last second IMPULSIVE NOISES If the sound has a short duration it is called impulsive i e writing with a typing machine the noise caused by a hammer or by a gun are classified as impulsive sounds To assess their impact on the auditory apparatus consider that the more the sound is short the less the ear can hear it For this reason a time constant has been defined in the international standards IEC 60651 IEC 61672 called IMPULSE very fast 35ms for increasing sound pressure levels and very slow 1 5s for de creasing levels LAlmax LAF max LASmax dB 80 75 70 65 14 31 36 125 14 97 45 625 14 51 55 125 145204625 145214125 1452 25 625 14 52 55 125 143242625 143252125 105 In case a sound source emits noises with a strong impulsive component the level measured with the IMPULSE constant will be much higher than the SLOW level The figure shows the sound level profile
15. HD2010 MC TO THE SOUND LEVEL METER AND USE OF THE MEMORY CARD cccececceccecceceecesceceecs 72 READING DATA DIRECTLY FROME dc 73 DATA TRANSFER FROM SOUND LEVEL METER TO MEMORY CARD ccceccscecceccecescuccecteceecescescscescuscescesescascescesescescuseeses 73 TECHNIGAL SPEGIFICATIONS tell leds cielo iia 73 TECHNICAL SPECTETCATTO N Scan A A A A Na 74 NIEFROEOGICGALCHARACTERISTICS Luini iena A 75 ELECPRICALCHARACFERISTICS earlier il Li 78 STATISTICAL ANA air tM ae nels Rt ees ace ua 79 A 79 STORAGE OF MEASUREMENES e a es ce aura is 80 PROGRAMS eb LL Linea de tem 80 OTHER CHARACTERISTICS nd ads 81 REFERENEESTANDARDS 00d die 82 BIC STANDARD REGULATION Se o ad eee 82 A ela 82 ORDERING CODES ia 3 ACCESSORIES AND SPARE PARES ta ra 85 WHAT SA aR alla ccd tas 6 MEXSUREMENT PROCEDURE E E T EA EA E EE Sa e ds 86 STORAGE OF MEASUREMENTS WITH THE ADVANCED DATA LOGGER OPTION ccccscescecceccecescesceccecescsceccecescescucens 87 MEASUREMENT OP NOISE LOO SE oes ales con a lidia 88 A A TREE CO E ORION AO 89 DATA PRINTING de od ae aca A odo EE ls OU eS lil ie 89 TROUBEESHOOTEN Goonies 90 RESTORING PACTORY DET UP a leeis e ae el a o O 90 RESTORING PACTORYC ALIBRA TON la a e o le cl e e le e eae eS 90 MISCELLANEOUS PROBLEMS ca ts a 91 KEYBOARD DESCRIPTION ii A a 92 ANNEX AO 98 Ad HD20T0UE MEASURING PARAMETERS pollici did 98 A2 MEMORY CAPACITY DURING THE LOGGING FUNCTION cssceccecceccececccceccecescescestecsscascsc
16. IEC61672 type 1 and type 2 tolerances Installation and uninstallation procedure is very easy in this way periodical acoustic verification using a calibra tor of the microphone is as simple as for a standard measurement microphone The unit is composed of a central body plus the follow ing components 10 HD SAV3 wind screen 3 HD WMEIL ant bird spike 4 HD WME2 rain shield 2 HD WMES stainless steel support 1 Microphonic capsule with optimized free field correction Microphone preamplifier HD2010PNE2W heated preamplifier for UC52 microphone including CTC calibrator and driver for up to 10m extension cable e Extension cable standard 5m length 10m on request For detailed information on the use of HD WME unit please refer to the specific part of this manual on page 45 for information on assembling and disassembling the unit please refer to appendix on page 113 THE PREAMPLIFIER The HD2010PNE2 preamplifier amplifies the weak signal provided by the microphone The preamplifier has a gain selectable between 0 and 10 dB and is supplied with a charge partition cali bration device which allows to measure the frequency response of the whole amplification chain microphone included diagram described on page 49 The output driver allows transmitting the microphone signal via a cable to a distance up to 10m HD2010PNE2 preamplifier together with UC52 microphone can measure signals up to 140 dB The following
17. In RUN mode it stops the measurements When pressed in PAUSE mode it resets the integrated measurements such as Leq SEL MAX MIN levels etc PROG key activates the program selection mode PRINT key transfers the displayed data to the serial port When pressed for more than 3 sec onds 1t enables the continuous printing Monitor Monitoring will be stopped by pressing the key once more ON OFF key turns the instrument on and off Keypad RIGHT key in graphic mode 1t moves the selected cursor towards higher values Battery symbol indicates the battery level The more the symbol is empty the more the battery has run down LINE un weighted input or output connector 3 5mm jack CONNECTOR FUNCTION The instrument is equipped with five connectors one in front one to the side and three at the bot tom The figure on page 2 shows n 3 n 14 n 15 n 16 n 27 8 pole DIN connector for preamplifier or extension cable The connector located on the instrument front face has a positioning notch and a screw ring nut to ensure proper lock ing M12 connector for RS232C multi standard serial port and USB For the connection to a PC s RS232 port you have to use the dedicated serial null modem cable code HD2110 RS fitted with a 9 pole female connector As alternative the sound level meter can be connected to a PC USB port by using the dedicated cable HD2110 USB fitted with type A USB connector Male conne
18. Last 2003 01 01 10 00 Calibr level 34 0dB p amp ja rio Leq 51 JaBc Run calibration 7 YES NO gt gt 4 Press YES to continue and NO to quit 49 5 Ifyou press YES the calibration is run wait till the procedure will be over 6 At the end the calibration result will be shown and you will be asked to confirm a new cali bration ELECTRIC CALIBRATION Last 2003 01 01 10 00 Calibr level 94 0dB 7 7 ALeq Hd dBC Confirm calibration YES NO me 7 Press YES keypad LEFT key to confirm or NO keypad RIGHT key to refuse the calibra tion just finished At the end the instrument will switch to the SLM display in STOP mode The stabilization on a value far from the reference one indicated by a ALeq higher than some tenths means that one of the components of the microphone preamplifier instrument chain was af fected by a considerable drift and if this difference exceeds the maximum limit admissible by the instrument calibration will fail In this case refer to Troubleshooting page 90 and if necessary contact our service department 50 ACOUSTIC CALIBRATION In order to keep the acoustic sensitivity of the microphone sound level meter chain steady over the time and in the different using conditions a reference sound source is used which gener ates a pure tone at a reference frequency with a given pressure level stable over the time For this purpose acoustic calibrator class 1 or
19. PRINT key you can send to a PC or to a printer via PRINT the serial interface the screen page displayed when pressing the key in ASCII format The suggested serial printer can be the HD40 1 please refer to page 66 On the instru ment display a letter P replacing the status indicator highlights data transfer If the PRINT key is hold down until the letter M Monitor function and the recording status indica tor flash alternatively the displayed screen will be continuously sent to the serial interface press PRINT again or STOP to end the operation After activating the Monitor function even if you press the MODE key the type of screen sent to the serial interface will not change The PRINT function can also be selected starting from the STOP status In this case the func tion will automatically activate as soon as the instrument switches into the RUN mode If the instrument gets into the PAUSE mode the function will remain active but sent data will be combined with the P symbol indicating the suspension status of the integrated parameter calculation The Monitor function does not interfere with data recording which needs advanced data logger option on memory and can be activated simultaneously A series of values is sent every 0 5s 29 THE RECORD FUNCTION The REC key supervises the function of recording data on the instrument memory Two recording modes are available the single manual or automatic and
20. USB port by using the HD2110 USB cable The USB port connection requires the previous installation of a driver contained in the Noise Studio software Before connecting the USB cable to the PC install the NoiseStudio software With Windows 7 operating system it s necessary to boot the PC taking care to disable the re quest for driver signature as explained in the USB driver installation guide included in the in stallation CD Rom of Noise Studio Proceed as follows l 10 Set the instrument menu item MENU gt gt Instrument gt gt Input Output gt gt Serial Device to USB Confirm and exit from the menu Do not connect the instrument to USB port until requested from the wizard Insert Noise Studio installation CDRom and wait for AutoPlay window to appear For Win dows Vista and Windows 7 operating systems it s shown the window below select auto run exe execution see note 1 in the next paragraph gt AutoPlay Es fos lt sa Unit DVD RW E CDRoot e Val Esegui sempre questa operazione per software e giochi Opzioni generali j Apri cartella per visualizzare i file cai Til E The starting screen of Noise Studio will be opened if the operating system prevents software to start please see note 1 in the next paragraph From starting window of Noise Studio click on USB drive installation to start the driver 1n stallation procedure The
21. amplifier with steps of 10 dB between 0 dB and 20 dB positioned at the input The levels with A C and Z wideband frequency weighting are calculated in parallel in the DSP Peak C and Z levels are also calculated The levels calculated by the DSP are transmitted to the microprocessor for further processing ready to be displayed stored and printed The microprocessor controls all the instrument processes management of the electrical calibrator Flash memory display keyboard and multi standard serial interface RS232 and USB The microprocessor also supplies the electrical signal corresponding to the A weighted instant level with FAST time constant sent to DC output gt 12 DESCRIPTION OF DISPLAY MODES The HD2010UC measures simultaneously 3 selectable parameters statistic ones too and dis plays them at a fixed frequency corresponding to 2 measurements s simultaneously with Advanced Data Logger option measures the A weighted sound pressure level with FAST time constant and displays it at 8 samples s as a statistic analyser it calculates the probability distribu tion and the percentile levels cumulative distribution To be able to display all these data the HD2010UC provides 4 different display modes as shown in the figures below O gt l ABC Fig 1 SLM gt LAeq 00 05 38 5 100 20 cU BR o_oo W Y Fig 3 Probability distribution Fig 4 Percentiles Levels Press MODE at any
22. can be activated PAUSE CONTINUE key pauses integrated measurements From PAUSE mode integrated measurements can be resumed by pressing the same key In PAUSE mode press START STOP RESET to reset measurements SELECT key enables modification mode of displayed parameters by selecting them in se quence ENTER key It confirms entered data or edited parameters LEFT key in the menu it 1s used when editing parameters with attribute In graphic mode it reduces the vertical scale M12 connector for multi standard serial port RS232C and USB Auxiliary power supply connector DC output connector 2 5mm jack DOWN key in the menu it selects the next line or decreases the selected parameter In graphic mode it increases the vertical scale levels the graph is shifted downwards RIGHT key in the menu it is used when editing parameters with attribute In graphic mode it extends the vertical scale MODE key if Advanced Data Logger 1s installed selects in circular order the instrument s different view modes from the display of 3 channels in numeric format to the profile Data Logger option to the statistics screens Advanced Data Logger option UP key in the menu it selects the previous line or increases the selected parameter In graphic mode it decreases the vertical scale levels the graph is shifted upwards START STOP RESET key when pressed in STOP mode it starts the measurements RUN mode
23. class 2 conforming to IEC 60942 and compatible with the microphone capsule UC52 are used For the HD2010UC models are available Class 1 HD2020 and HD9101calibrators while HD9102 model is available for Class 2 versions The control that the reference sound level by the acoustic calibrator is correctly measured by the sound level meter 1t 1s normally acceptable that the difference between the sound level meas ured by the sound level meter and the nominal level of the calibrator be lower than 0 5dB has to be carried out before and after a series of measurements to ensure that measured values are correct When the difference between the sound calibrator level measured with the sound level meter and the nominal value exceeds 0 5dB it is necessary to perform an additional acoustic calibration Warning to prevent damaging the sound level meter it is important during the calibration procedure to follow carefully the on screen instructions and the indications provided by this manual Operating Procedure Switch on the sound level meter if necessary press STOP to finish the measurement on progress and perform the following procedure The program will automatically control that the warm up time indicated by a flashing W is over 1 Press PROG and with the help of the DOWN arrow select Acoustic calibration Press SELECT to start calibration 2003 01 01 10 00 00 ACOUSTIC CALIBRATION Batt 15 Mem Ad 54 Last 2003 01 01 10 00 Calibr le
24. divided the measurement time three intervals of 20 seconds each isolat ing the three noise phases Some markers point out the beginning of each interval when the Leq was reset Three equivalent levels at about 75dB are obtained corresponding to each interval To select the integration mode select the proper parameter MENU gt gt Instrument gt gt Measurement gt gt Integration Mode as SING for single integration or MULT for multiple integration To perform the setting directly from the keyboard press SELECT to choose the integration interval When the integration interval numeric value flashes press RIGHT to set the multiple integration mode or LEFT to set the single integration mode When the integration mode is set on MULT the Tint symbol flashes 26 dB 80 70 60 50 1043475 1043555 1044035 1044115 1044195 1044275 1044355 1044435 SINGLE INTEGRATION When the integration mode is single the sound level meter resets the integrated parameters i e Leg starts measuring the instant sound levels 1 e SPL and calculates the integrated levels i e Leq maximum and minimum levels or statistical levels regularly until acquisition stops This mode provides at the end of the measurement session the integrated levels over the whole acquisition period The parameter MENU gt gt Instrument gt gt Measurement gt gt Integration Interval allows to suspend the display update when set time is over Now to store
25. down At this point the microphone 1s accessi ble and you can proceed with calibration 114 SS For details on calibration see the specific chapter at page 40 7 For assembly of HD WME protection proceed as described in the next paragraph A5 2 Assembly To assemble the unit a 1 5mm male hex key and a 14mm wrench are needed To assemble completely the protection start from step 1 If you need only to assemble the preampli fier with the microphone after calibration from step 4 1 Fit the rain shield HD WME2 on the metal grid support HD WME2 115 2 Insert the wind screen HD SAV3 HD SAV3 3 Apply the anti bird spike and secure it using the three hex head screws located on the support at the base of the windscreen 116 4 Insert the preamplifier A into the support pushing slowly upward until it s limit position 5 Screw the gland B using if necessary a 14mm wrench Be careful not to twist the preamplifier cable 117 6 Insert the cable connected to the preamplifier through the system C and screw the stern to the support 7 Screw the terminal placed at the lower end of the stern D releasing the cable laterally i 118 8 To secure the outdoor protection you can use the threaded end D or you can apply the fitting E on the tripod The terminal E has two threads Ya and Y x E o Ci Ci Cd F ha w 119
26. factory calibration all menu items are simultaneously brought back to the factory parameters default MISCELLANEOUS PROBLEMS L The instrument does not turn on after battery replacement Remove one of the batteries and wait at least 5 minutes before reinserting it The instru ment should turn on automatically when the battery is inserted The detected sound levels seem incorrect Ensure that no condensation is present on the capsule or preamplifier Avoid turning on the instrument in conditions of possible condensation growth Use the outdoor micro phone unit HD WME to perform measurements in conditions of high humidity or when it is raining Check that the warm up time indicated by a blinking letter W over the upper left status indicator has elapsed Check measurement accuracy using the acoustic calibrator Load factory calibration Check that the microphone protection grid is screwed down on the capsule securely Upon turning the sound level meter on it turns off automatically right after the introduction screen The batteries are flat The sound level meter does not communicate with the PC Check that the sound level meter and PC communication speed is the same MENU gt gt Instrument gt gt Input Output gt gt Baud Rate Check that the connection cable is plugged correctly in the sound level meter and is con nected to a PC serial port or USB with the item MENU gt gt Instrument gt
27. function the sound level meter is able to perform the following task e Environmental noise monitoring e Analysis of sound events e Complete statistical analysis with percentiles calculation from L to Loo Using a HD2010UC you can measure the sound level by programming 3 parameters and freely se lecting the frequency weightings and time constants You can measure parameters such as Leq SEL and maximum and minimum sound levels with integration times from second to 99 hours If an undesired sound event produces an over load indication or simply alter the result of an integration its contribution can be excluded using the versatile Back Erase function The measured sound levels can be recorded in the large non volatile memory in order to be trans ferred to a PC using the supplied NoiseStudio program For long term noise monitoring needs it s possible to increase the HD2010UC storing capacity with the optional HD2010MC Secure Digital memory card reader This device is supplied complete with a 2GB memory card As a Statistical analyzer the HD2010UC samples the sound signal 8 times per second with A frequency weighting and FAST constant and it analyzes it statistically in 0 5 dB classes It is possi ble to display up to 3 percentile levels between L1 and L99 For further analysis the LINE un weighted output allows recording the sound signal either on tape or directly on a PC equipped with a audio acquisition card The high speed of th
28. goes back to standard display and the STOP and battery sym bols alternate with the R Replay and P Program letters respectively I I R Tint 0s 0108 SE Ceo J dBA OU O aac II ot l l ABC Four types of files are recorded e Sing Single screen in manual recording e Auto SLM screen in continuous recording with Advanced Data Logger option e Mult Multiple screens in continuous recording with Advanced Data Logger option File type Sing Relative data are loaded and displayed automatically pressing the LOAD key File type Auto Press START to see the data session the screens of the measurement session will be displayed in the acquisition order During the replay use the PAUSE CONTINUE key to stop and restart the re play or press STOP to finish At the end the instrument will position on STOP A single screen page can be sent at any moment to the serial interface While the replay is in pause press START if you want to display the next data If while in pause the START key 1s hold down the replay will be forwarded fast File type Mult Press START to see the data session if no reports and or events were recorded the measurement session screens will be displayed as for the Auto files If in addition to measurements reports and or events were also recorded the Advanced Data Logger option is required an intermediate page is displayed allowing the display
29. is better to isolate both instrument and microphone from strong vibrations Magnetic Fields The influence of electrostatic and magnetic fields on the sound level meter is negligible PRECAUTIONS AND GENERAL RULES OF USE e Ensure that ambient conditions fit the use of a sound level meter Take care that the instrument has reached thermal equilibrium that there is no condensation on metal walls and that tempera ture relative humidity and pressure are within the limits specified by the manufacturer The use 110 of the sound level meter in conditions of high humidity with consequent condensation can cause damages e Check the battery level of both sound level meter and calibrator e Check that the sound level meter is calibrated by measuring the calibrator reference sound level This inspection has to be repeated at the end of measurements to assure the sound level meter stability e Use the windshield when necessary The shield grants a good protection against shocks Its use is suggested also indoor above all in presence of machines with mechanical parts in movement When available activate the proper adjustment on the sound level meter to compensate the shield effect on the microphone frequency response e Determine the type of acoustic field where you have to operate and eventually apply the correc tions that the sound level meter provides Consider the measuring environment the kind of sound source and the position in which m
30. is installed and the keys REC and START STOP RESET are pressed simultaneously the continuous recording of data on memory will be activated The 3 parameters of SLM mode are stored twice a second while the A weighted sound level with FAST constant is stored 8 times a second Press PAUSE to stop recording temporarily press CONTINUE to restart it As soon as you go back to the RUN status a special record is stored containing indications about the possible erase see the Back Erase Function in SLM mode on page 16 besides date and time The HOLD key does not affect data recording When the continuous recording is active 1f the integration mode is set to single the integra tion time acts like a timer stopping automatically the acquisition as soon as the set time is elapsed Integration time is programmable from SLM display or using the relative menu item Menu gt gt In strument gt gt Measurement gt gt Integration interval When integration mode 1s set to multiple continuous recording do not stop when integration time elapses a special marker Last is stored together with the last data just before the integrated levels clearing at the beginning of each integration period see the chapter DESCRIPTION OF THE DIFFERENT INTEGRATION MODES on page 26 The statistical levels and also the inte grated parameters displayed on the SLM screen are cleared 84 CONTINUOUS RECORDING OF REPORT AND EVENTS GROUPS With the Ad
31. models are available e HD2010PNE2 connector for Y UC52 microphone and driver for up to 10m extension cables This preamplifier supplied with CTC electric calibration device can be directly plugged into the HD2010UC sound level meter or connected via extension cable up to 10mt e HD2010PNE2W heated preamplifier with connector for 2 UC52 microphone and driver for extension cables This preamplifier supplied with CTC calibration device can be connected to sound level meters using the 5mt supplied extension cable 10m as option 2 Ji THE INSTRUMENT The signal of the preamplifier comes to the instrument receiver and its output is sent to the LINE connector and to the A D converter input The instrument can be set to use the LINE channel in place of the signal coming from the preamplifier The A D converts the analogue signal into the numeric format at 20 bits The measurement dynam ics exceeding 140 dB is divided into 5 ranges using a variable gain amplifier with steps of 10 dB between 0 dB and 20 dB positioned at the input The signal of the preamplifier comes to the instrument receiver and its output is sent to the LINE connector and to the A D converter input The instrument can be set to use the LINE channel in place of the signal coming from the preamplifier The A D converts the analogue signal into the numeric format at 20 bits The measurement dynam ics exceeding 140 dB is divided into 5 ranges using a variable gain
32. of Commands SET 60 SETUP parameter configuration KEY 21 KEY keyboard simulation o _ ti STATUS instrument status DUMP memory dump Fach group contains a given number of commands Each command 1s identified by a specific string The generic syntax of a command is the following lt group gt lt command gt lt value gt CR LF Ex SET INPUT_GAIN 10 r n sets the INPUT GAIN parameter to 10dB see SET paragraph Only capital characters are acknowledged Each token can be shortened at the minimum number of characters that univocally identify it The example can be shortened as follows SET INP 10 r n Here are the possible command formats A3 SET INTEGRATION TIME lt SS MM HH gt lt value gt CRLF A4 SET TIME lt hh gt lt mm gt CRLF AS SET DATE lt aaaa gt lt mm gt lt gg gt CRLF A6 SET x SLM PARAMETER lt Parameter abbreviation gt lt parameter attribute gt CRLF A8 SET lt COMAND gt lt value gt CRLF A10 SET lt COMAND gt CRLF Cl KEY lt COMAND gt CRLF C2 KEY lt COMAND gt lt value gt CRLF DI STT lt COMAND gt lt OPTION gt CRLF El DMP lt COMAND gt CRLF If you enter properly in the string you can get either a help for the compilation of the desired command or the current status of the instrument configuration parameters Here are the formats of the commands that use the character 0 CRLF Provides the list of the groups of com
33. of the batteries while the instrument is switched on this operation ensures that all the instrument internal circuits are discharged e Press and hold ENTER down and then insert the battery you had removed The instru ment will switch on and will display a warning relevant to the load of factory calibration Release ENTER and press the key on the right near the CONTINUE key e After having waited for the stabilization time run the program ACOUSTIC CALIBRATION Should the program fail contact the service department RESTORING FACTORY SETUP The default configuration of the instrument parameters factory setup can be recalled at any time by means of a combination of keys This operation does not clear the content of data mem ory While the instrument 1s off press and hold down ENTER and power on the sound level meter All the menu items are simultaneously brought back to the default value RESTORING FACTORY CALIBRATION The Factory Calibration can be recalled at any time by means of a combination of keys This operation does not clear the content of data memory While the instrument is off remove one of the batteries and wait at least 5 minutes for the sound level meter internal circuits to discharge 90 Press and hold down the ENTER key while reinserting the battery the sound level meter will auto matically turn on Confirm the load of factory calibration The sound level meter calibration parameters are restored to the last
34. off see Fig 12 iUs Ji 08 c5 M NO Automatic 56 5 dBA turning off Programmed 50 5 ABC 3 acquisition O by timer CURSOR f gt Fig 12 Delayed acquisition timer warning screen The instrument will turn back about one minute before the set delay to allow execution of the warm up time before starting the automatic acquisition During this waiting minute the TIMER message blinks showing the automatic acquisition feature has been activated Fig 13 Waiting for the timer star The acquisition will end when the set integration time Tint has elapsed and the instrument will automatically turn off after disabling the timer 34 DESCRIPTION OF THE MENU FUNCTIONS The menu collects all of the parameters through which the instrument functions are set The menu can be accessed even when the instrument is measuring but parameters can be modified only if the instrument is in STOP mode If this is not the case a message will invite you to stop the current measurement WARNING Stop the measurement to continue SELECT PARAMETER WARNING Stop measurement to continue Press YES and you will be allowed to change the selected parameter Some of the parameters listed in the menu can also be modified directly from the measurement dis plays see the chapter concerning the different display modes from page 13 The menu is nest structured that is it is organised in menus and submenus To
35. over 1 h Leg 90 dB over 2 h Leg3 50 dB over 5 h T 10 7 10 7 10 L 10 lo eq T S10 T T T Leg 1 Leg 2 Leg 3 partial equivalent levels T T2 T integration times of partial equivalent levels Leg 7 total equivalent level In the example T 1h 2h 5h 8h The result 1s 1 10 2 10 5 10 84 2dB 8 Loot 10 logu 122 Sound Exposure Level represented by the Lg symbol or SEL it is defined over a given tl t2 time interval like T L 7 10 log jz p t r L y 10 log Do l where T tv t is the time interval under examination 2 4 p t the square of instantaneous pressure 7 po the square of reference pressure Leq r continuous equivalent sound pressure level over T interval To ls The level of Lg sound exposure is expressed in decibel and can be frequency weighted For exam ple Lag will indicate the level of frequency weighted sound exposure with A filter Dose In the field of environmental noise monitoring preventing auditory injuries the measurement of the noise Dose is used It 1s meant as a percentage fraction of a daily maximum exposure to noise 100 D 0 fro dt C exposure percentage for an Exchange Rate equal to Q daily exposure time usually 8 hours measurement time sound pressure level when it is higher than the Threshold Level and otherwise Criterion Level for a daily expos
36. parameter independent of the exchange rate and equal to e 10 for Q 3dB e 5 log2 for Q SdB e 4 log2 forQ 4dB 88 The sound level meter calculates the following parameters DOSE A the percentage of the daily effective dose and DOSE d A the estimated daily DOSE according to the programmed parame ters The DOSE calculation 1s characterized by three parameters 1 DOSE Criterion is the SPL constant value which continuous exposure for 8 hours determines a 100 DOSE 2 DOSE Threshold that represents the SPL level under which the DOSE is not increased 3 Exchange rate is the variation of the SPL value that determines a double or half duration of ex posure with the same DOSE Criterion Provided values are 3 4 or 5dB The three configuration parameters are contained in the submenu Measurement MENU gt gt Instru ment gt gt Measurement once they have been set select the submenu Sound Level Meter MENU gt gt Sound Level Meter and choose according to the type of measurements to be made between the parameters DOSE A or DOSE d A The integration time can be entered directly in the SLM measuring window Now the instrument is ready to carry out the measurement press START After Tint time has elapsed the instrument turns into the HOLD status and displays the DOSE calculated over the set time STATISTICAL ANALYSIS Up to 3 percentile levels are selectable in the SLM display mode MENU gt gt Instrument gt gt
37. program checks the operating system version and copies related drivers in a temporary folder At the end a message appears asking to plug the sound level meter connection cable to PC USB port press OK and close Noise Studio software pressing EXIT key Connect the sound level meter to USB port and turn it ON when Windows recognise the instrument it appears a message that a new device has been detected Wait some seconds until the message new hardware is installed and ready to work appears Driver installation procedure is ended whenever the instrument will be connected it will be automatically recognized 68 NOTE FOR INSTALLATION Note 1 for Windows Vista and Windows 7 operating systems 1 For software installation 1s requested Administrator permission 2 If the operating system prevents the software to open boot the PC as administrator insert in stallation CDRom and when the following window appears select Open folder to view files General options Bl aot ec to view files L s Explorer 3 In the following screen click with right mouse key on file Autorun and select Execute as ad ministrator 4 Continue from point 5 of previous paragraph Note 2 if the sound level meter has been connected to USB port before USB driver installation in Windows 2000 and XP operating systems it appears the window new hardware installation In Windows Vista and Windows 7 it appears an installation error
38. protective equipment can be carried out according to UNI EN 458 through comparison of the A and C weighted equiva lent levels that can be measured simultaneously SNR method The noise source impulsivity is easily evaluated according to UNI9432 measuring the equivalent sound pressure level A weighted with Impulse time constant LA eql The class 1 HD2010UC sound level meter with the Advanced Data Logger option is suitable for sound level monitoring and acoustic mapping Using the Advanced Data Logger option 1t can also perform assessments of the acoustic climate with capture and analysis of sound events When measuring traffic noise near airports railways and roads the sound level meter can be used as a multi parameter sound recorder combining statistical analysis features Remote electrical calibra tions and diagnostic tests can be executed using its remote control capabilities The HD2010UC can be configured in accordance with different customers needs the available op tions can be activated on the new instrument as well as later on when requested by the user The provided options are Advanced Data Logger option Display and recording of the A weighted sound level profile with FAST time constant sampled 8 times per second Storage of the profiles of 3 programmable parameters sampled twice per second Simultane ously the profiles of 3 programmable parameters are recorded at 2 samples second The HD2010 so
39. select a menu item use the UP and DOWN arrows until the selected item flashes When the parameter next to a menu item does not flash it means that the item cannot be changed A po RSede BaudRatei 4 bK lt This parameter can be changed RS23e2 Parity 2 OFF This parameter CANNOT be changed Press SELECT to access the selected submenu or to modify the selected parameter Use the UP and DOWN arrows to edit the flashing selected parameter press ENTER to confirm the new value press MENU to cancel the input changes _ 35 Press MENU to exit a menu and return to the upper level until you get the measurement display again gt Tint 0s 01 08 25 A 2007 01 01 10 00 00 Batt 957 Mem Ad 5 SELECT MENU Instrument Sound Level Meter Calibration When you access the menus current date and time are displayed as well as the battery charge level and the available memory If you are in a submenu the SELECT MENU item becomes SELECT SUB MENU The dots at the end of a list mean that there are other items following the visible ones press the DOWN arrow to display them INSTRUMENT The Instrument menu includes all data relevant to the instrument identification as well as some general parameters of the instrument itself input and output settings and measurement global parameters It consists of four submenus as described below IDENTIFICATION It includes the information that identifies the instrume
40. stopping automatically the measurement when the time is elapsed This screen page is not recorded in the Auto Store mode DISPLAY DESCRIPTION Displayed parameters Acquisition time gt LFmx 80 05 10 0 Maximum level Scale factor Analogic bar Minimum level Sampling interval Weighting Fig 5 Description of the Profile mode display The Fig 5 presents the time profile of the A weighted sound pressure level with FAST time constant The integration interval is shown in the left corner at the bottom of the display Always at the bot tom in the centre the display shows the measurement unit and the frequency weighting of the measuring parameter The amplitude of the vertical scale of the displayed graph corresponds to 5 divisions The am plitude of each division is called scale factor of the graph and appears in the middle of the verti cal axis Using the RIGHT zoom and LEFT zoom keys this parameter is selectable in real time among 20dB 10dB or 5dB by division Use the UP and DOWN arrows to set the graph full scale with steps equal to the selected scale factor starting from the instrument full scale In this way the graph can be shifted UP or DOWN depending on the key you have pressed An analogue bar indicator on the display right side provides the non weighted instantaneous level of the input sound pressure level as for the SLM mode bar During Recording mode 8 values per second of the Larp le
41. store up to 500 recordings Through the Advanced Data Logger option the HD2010UC can automatically store data accord ing to two different modes continuous and automatic recording The sound level meter storage capacity when in Continuous Recording mode is equal to 23 hours with the supplied memory of 4 MB The table below gives the sound level meter storage capacity in Auto Store mode recording automatically at the end of each period equal to the set integration time the SLM screen parame ters The storage capacity is expressed as the time necessary to get the memory full Integration Interval Capacity gt 85 days Sm gt year If the Advanced Data Logger 1s installed the storage of Reports and Events 1s made by units re cord which are recorded corresponding to each interval Menu gt gt Instrument gt gt Measurements gt gt Report Time or for each event Each unit is made of one Header followed by the parameters en abled in the Menu gt gt Data Logger gt gt Report and gt gt Event The following table explains the mem ory occupancy in byte for each block composing one unit record Occupancy Report or Event bytes HEADER PARAMETERS STATISTIC From the table it s possible for example to calculate the memory occupancy for reports recording every 10 minutes Menu gt gt Instrument gt gt Measurements gt gt Report time gt gt 10 min including the 5 PARAMETERS Menu gt gt
42. the acoustic signal Loo Los and Loo are rep resentative of the background noise Other parameters characterizing the sound level have been derived from the statistical levels For example in the measurement of vehicle traffic noise the Traffic Noise Index has been de fined as TNI 4 Lio Loo T Leg That provides higher values in the case of a sound level strongly fluctuating and thus characterized by a bigger difference between Lio and Loo 112 A5 MICROPHONE OUTDOOR PROTECTION HD WME ASSEMBLY DISASSEMBLY AND MAINTENANCE Are given below operating instructions to disassembly assembly and periodic maintenance of HD WME outdoor protection unit A5 1 Disassembly To completely disassemble the unit a 1 5mm male hex key and a 14mm wrench are needed To separate all components of the unit proceed as follows to extract the group preamplifier micro phone capsule to calibrate start from step 3 1 Remove the anti bird spike by loosening the three hex head screws at the base of the windscreen 2 Pull up the windscreen HDSAV3 and the rain protection HD SAV3 113 3 Unscrew the terminal placed at the lower end of the stern A 4 Unscrew the stern B and disconnect the cable connected to the preamplifier 5 Unscrew the lock nut of the preamplifier C using if required a 14mm wrench Be careful not to twist the preamplifier cable 6 Remove the preamplifier D by pulling it slowly
43. the basis of frequency response specifications and the spectral corrections calculated by the sound level meter DSP allows obtaining a Class 1 response according to IEC61672 2002 The HD2010UC is also available in the Class 2 version The frequency response of the microphone depends on the presence of devices like wind shield HD SAV or all weather protection unit HD WME In order to make measurements with the maximum possible precision in different situations the HD2010UC sound level meter can automatically apply spectral corrections needed to measure in random field conditions or with the windshield or with the all weather outdoor protection Spectral correction for diffuse field measurement is enabled setting parameter Menu gt gt Calibration gt gt Mic Resp Correction gt gt RI while correction for HD SAV mounted is enabled setting parameter Menu gt gt Calibration gt gt Shield gt gt SAV For more information on the applied corrections please refer to the UC52 microphone manual HD WME outdoor protection The windshield and rain protection units mounted on HD WME outdoor protection modify microphone frequency response in order to apply the correction to sound level meter overall re 75 sponse it s necessary to set the specific parameter Menu gt gt Calibration gt gt Shield gt gt WME With this setting applied HD2010UC sound level meter with HD WME protection fully com plies to type 1 specifications according
44. time and are represented with the symbol Lx where x is the percentage value for example Lio gives the sound level exceeded in the 10 of the measuring time For the calculation of the percen tile levels the analyzer makes a sampling of the Lp sound level with FAST time constant and A frequency weighting at a frequency usually equal to 10 Hz Sound levels measured in this way are classified over the whole measurement range according to given amplitude intervals usually a fraction of decibel called classes When starting the meas urement all classes will have a null number of samples while at the end of measurements the classes will contain a number of samples depending on the rate with which a sound level has been measured inside the respective interval At the end of the measurement time the distribution of probabilities will be first calculated dividing the content of any class by the total number of samples and multiplying the result by 100 then the cumulative distribution of probabilities will be calculated having a value of 100 for lev els lower than the first class containing at least a sample and taking lower values down to zero for levels higher than the last class containing samples From the definition of the statistical levels it 1s evident that L will be very near to the maxi mum measured level while Loy will be very near to the minimum measured level Therefore while levels Li Ls and Lio are representative of the peaks of
45. time to jump from a screen page to the next one The display will show first the SLM screen with 3 measuring parameters in numeric format and if the Advanced Data Logger option 1s enabled the Profile screen with the A weighted sound pressure level with FAST time constant Larp the Probability distribution and the Percentile Levels screens Upon power on the sound level meter displays the SLM screen Some indications are shown in all modes They are see the figure on the right eee mA overload indicator a memory e Measurement status indicator a v under range e Overload Under range indicator e Battery level indicator The first symbol in the left corner at the top shows PAUSE the measurement status of the sound level meter e RUN the instrument is measuring ZzUIZO v e PAUSE the calculation of integrated measure STOP ments and the recording of measurement have HOLD been suspended Instantaneous parameters are Print still being measured and displayed Monitor e REC the instrument is measuring and recording e STOP the instrument is not making any measurement 1 e HOLD the calculation of integrated measurements has come to the end of the set integration interval or HOLD was pressed e P Print indicates that printing is in progress M Monitor indicates flashing that continuous data printing has been started R Replay appears flashing when the Memory Navigator program is in use A
46. to IEC 61672 standard in such configuration when used in vertical position the sound level meter is able to measure accurately environmental noise from above 0 incidence like for example the noise generated by aircraft overflights When parameter Menu gt gt Calibration gt gt Shield is set to WME and microphone acoustic re sponse menu Calibration gt gt Mic Resp Correction is set to RI it s applied a frequency spectral correction to obtain a flat frequency response in a diffuse field Using this setting the HD2010UC sound level meter with HD WME outdoor protection mounted in vertical position 1s suitable for measurements of environmental community noise due to noise sources on the ground road traffic noise railway noise For more information on spectral correction applied to HD2010UC sound level meter when used with HD WME outdoor protection please refer to UC52 microphone user manual Self generated Noise The intrinsic noise measured replacing the microphone with the capacitive adapter 1s shown in the following tables according to the different frequency weightings either for RMS level or peak level measurements dB LpkC LpkZ Linearity range The lower limit of the linearity range was calculated as the maximum between the upper limit decreased by 80dB and the self generated noise increased by 7dB The upper limit is equal to 141dB with a input gain equal to 0 dB and decrease by 10 dB for every 10 dB gain in
47. under device manager in both cases cancel operation disconnect instrument and restart the complete procedure starting from the beginning of this guide VERIFICATION OF PROPER DRIVER INSTALLATION To verify the proper installation procedure proceed as follows On Windows 2000 and XP operating systems Select START gt gt Settings gt gt Control Panel double click on SYSTEM icon Select Hardware gt gt Device Manager On Windows Vista and Windows 7 operating systems Select START gt gt Control panel then click on Device Manager icon Connect instrument to USB port The following items should appear e Port COM and LPT gt gt USB Serial Port COM The value is the number assigned to virtual serial port e Controller USB Universal serial bus gt gt USB serial converter 69 Controller IDE ATAJATAPI Controller SCSI e RAID 8 Controller USB Universal serial bus eS Controller host avanzato da PCI a USE Sis eS Controller open host SiS 7001 da PCI a USB Controller open host SiS 7001 da PCI a USB Controller open host SiS 7001 da PCI a USB Hub principale USE eS Hub principale USE eS Hub principale USE Hub principale USE e Periberica dbarchiviazione di massa USE LL DYDICO Rordrives Ba Human Interface Device HID Le Modern S Mouse e altre periferiche di puntamento 8 Periferiche di imaging 4 Periferiche di sistema Porte COM e LPT
48. will flash even if batteries are fully charged INPUT OUTPUT Submenu for the choice of parameters relevant to the instrument inputs and outputs Baud Rate Baud Rate this parameter and the next ones define the properties of the serial connection Selectable baud rate values go from a minimum of 300 to a maximum of 230400 baud The higher 1s the value the faster 1s the connection therefore when possible it is suggested to select the highest available value to speed up data transfer as much as pos sible If the instrument 1s connected to a printer with RS232 serial input or with a se rial parallel converter the value to be set is the one provided by the printer manufacturer WARNING When you use the serial interface the communication between instru ment and computer or printer with serial input works only if the instrument and PC or device baud rates are the same Take care of this note when using data transfer programs requiring a manual configuration of the serial port parameters such as i e HyperTerminal The NoiseStudio program combined with the HD2010UC automati cally sets the serial port so that no action by the operator is required RS232 Bits non modifiable parameter number of bits of which transferred data are made up the value 1s 8 RS232 Stop Bits non modifiable parameter stop bit the value is 2 RS232 Parity non modifiable parameter parity bit the value is none OFF Serial Device identifies the device co
49. 2010UC sound level meter THE MICROPHONE The UC52 condenser microphone is pre polarized and has a 2 standard diameter The fre quency response in free field is flat from 20Hz to 16kHz for type 1 sound level meter version HD2010UC Kitl UC52 1 Version used for type 2 sound level meter version is flat from 25Hz to 10KHz THE OUTDOOR MICROPHONE UNIT HD WME The microphone unit HD WME is suitable for long term outdoor noise measurements includ ing from fixed unattended station The unit is adequately protected from rain and wind the heated preamplifier allows performing measurements within a wide weather condition range The special preamplifier 1s fitted with a calibration circuit that uses a charge partition technique in order to calibrate the unit inclusive of the microphone capsule The output driver allows guiding cables up to 10m in length without important losses The free field response of the UC52 microphone fitted with the HD WME maintains the Class 1 specifications of the microphone only Its ease of assembly and disassembly mean the electro acoustic characteristics periodic check can be made like using a normal measurement microphone HD WME unit must be positioned in vertical position to fulfill correctly its function as weather protection Used in this way it can measure both community and airplane noise 90 and 0 Delta Ohm sound level me ters apply spectral corrections to measurements in order to comply with
50. A6 DEFINITIONS Frequency is the number of oscillations per second expressed in Hertz Hz Wave Length is the distance between two adjacent maximum values of pressure expressed in me ters m Period is the interval of time necessary to make a complete oscillation expressed in seconds s Sound Propagation Speed is the distance covered by the sound wave front in the unit of time ex pressed in meters second m s The propagation speed depends on the medium and in the air at ambient temperature it equals to about 344 m s Decibel a decibel symbol dB is defined by X dB 20 log 810 X where X is the measured quantity Xo is the reference value of the measurement itself to which correspond 0 dB Sound Pressure the sound pressure is the value of the change of atmospheric pressure caused by acoustic perturbations expressed in Pascal Reference Sound Pressure sound pressure taken as reference for the calculation of the pressure level it equals 20 10 Pascal and corresponds to the average human audibility threshold at a fre quency of 1 kHz Effective Value sound pressure effective value pms is the value of constant pressure that is ener getically equivalent to the instantaneous value p in a given time interval T where T to t is the considered time interval p t is the sound pressure squared at time t in t tz interval rms means ROOT MEAN SQUARE that is square root of the a
51. COM ports or code HD2110USB for PC with USB ports The HD2110 RS cable is a null modem cable with 9 way sub D female connector The HD2110 USB cable is fitted with an USB connector type A On request the connection cable for modem or printer DCE with a 25 way sub D male connector code HD2110 CSM or with a 9 way sub D male connector code HD2110 CSP can be supplied When the item MENU gt gt Instrument gt gt Input Output gt gt Serial Device 1s set on PRINTER MODEM or RS232 the following signals are connected to the 8 pin male connector type M12 available on the instrument Pin Direction Signal Description 6 Output RTS Requesttosend 7 Output TD_ Transmitting data channel _ SE GND Reference ground SI z The following signals are connected to the 9 pin sub D male connector of the HD2110 RS cable Pin Direction Signal Descripton DCE gt gt HD2010UC DCE CD DCE ready Carrier detect 2 DCE gt gt HD2010UC Receiving data channel HD2010UC gt gt DCE Transmitting data channel HD2010UC gt gt DCE NB DTE ready Reference ground 8 DCE gt gt HD2010UC CTS Cleartosend 9 HD2010UC gt gt DCE VDD___ Powersupply33V When the item MENU gt gt General gt gt Input Output gt gt Serial Device is set on USB the follow ing signals are connected to the 8 pin male connector type M12 available on the instrument Pin Direction Sign
52. D2010UC sound level meter If necessary see the description of the key functions from page 92 and the different display modes from page 13 MEASUREMENT PROCEDURE When the Advanced Data Logger option 1s active the HD2010UC sound level meter can acquire 3 parameters of SLM screen simultaneously twice second as well as the A weighted sound level with FAST time constant 8 times second The available parameters are those listed in the tables of appendix Al on page 98 Sound Level Meter SLM See also the description on page 15 Use the MODE key to select the SLM display where 3 measuring parameters are shown in numeric format Press SELECT repeatedly to set the integration time Tint the measuring range and the pa rameters to be displayed as described in the paragraph Selecting Parameters of chapter SEM sound level meter Mode on page 15 Alternatively measuring parameters can be set from menu as described in the chapter DESCRIPTION OF THE MENU FUNCTIONS on page 35 Alternatively measuring parameters can be set from menu as described in the chapter If the sound level meter is set to the single integration mode MENU gt gt Instrument gt gt Meas urement gt gt Integration Mode SINGLE when the Tint time is over the HOLD indication will ap pear and display update will stop Now you can print or store the values Meanwhile the instrument goes on measuring to continue display updating just press
53. Measurement gt gt Percentile Lev 1 4 programmable between L and Loo The statistical analyzer samples the sound pressure A weighted level with FAST time constant 8 times a second the levels are accumulated in 0 5dB classes The percentile levels are calculated interpolating the cumulative distribution The Advanced Data Logger option can be used to choose which parameter the statistical analysis is performed on equivalent level sound pressure level with FAST time constant and peak level The complete statistical analysis is available with the distribution of probabilities graph and the L to Log percentile level graph DATA PRINTING The displayed values can be printed at any time in all display and acquisition modes Besides the Monitor function can be activated via the serial line when you press PRINT and hold it down for 2 seconds This function allows to continuously send displayed data in real time to the se rial interface The transferred data are those of the active display mode at the time PRINT was pressed Data are continuously transferred until PRINT is pressed again or until the acquisition is stopped The Monitor function can be activated even in the STOP acquisition mode 1t will start as soon as the instrument turns into RUN mode The Monitor works independently from any recording of data on memory Using the Monitor function it is possible with the help of a PC to make measurements limited only by the PC storage cap
54. Mode MULT the Tint symbol flashes The battery symbol is in the right corner indicating battery level Integration interval Acquisition time Minimum level Maximum level Lh E dBA Bar showing istantaneous level En O Displayed parameters III ABE II a Lpk 3 5 dBC 15 The analogue bar shows the unweighted sound pressure instantaneous level in an 80 dB in terval Three measuring parameters are displayed under the analogue bar All displayed parameters can be freely selectable among the available ones There are no restrictions in the selection of frequency weightings Measuring parameters are displayed with a shortened label followed by the numerical value by the unit of measurement and when necessary by the frequency weighting The corre spondence between the label and the effective parameter is to be found on page 98 Integrated parameters like Leq and Lmax or Lmin which imply the accumulation of the sampled sound levels are displayed with a series of dashes until the level remains lower than the minimum measurable level Before starting a new logging the sound level meter automatically resets all measurements If the multiple integration mode is enabled MENU gt gt Instrument gt gt Measurements gt gt Integration Mode MULT integrated levels will be automatically set to zero at regular intervals equal to the set integration time Tint If the Advanced Data Logger option is inst
55. NU gt gt General gt gt Input Output gt gt Serial device on a different device than MC In order to re enable the reader set the menu item on MC READING DATA DIRECTLY FROM PC In order to read and copy files from the memory card to the PC use a memory card reader for PC the card will be recognized as external peripheral mass storage device Do not write cancel or modify the files through the PC In order to cancel the memory card use the formatting function see chapter Preparation of a new memory card DATA TRANSFER FROM SOUND LEVEL METER TO MEMORY CARD Data can be transferred from the internal memory of the sound level meter to the external memory by executing the sound level meter program PROG key gt gt Data download to MC This program allows copying of the measurements recorded in the sound level meter into the exter nal memory card The program can be activated only after having connected the memory card interface HD2010 MC as described in the chapter Connection of HD2010 MC to the sound level meter and use of the memory card During data download which occurs automatically the remaining memory space of the card and the estimation of program completion time are displayed on the screen The data transfer from the sound level meter to the memory card doesn t cancel the internal mem ory of the sound level meter I order to cancel the content of the internal data memory of the sound lev
56. REV 4 0 29 May 2012 HD2010UC Integrating Sound Level Meter ENGLISH Our instruments quality level is the results of the product continuous development This can bring about differences between the information written in this manual and the instru ment that you have purchased We cannot entirely exclude errors in the manual for which we apologize The data figures and descriptions contained in this manual cannot be le gally asserted We reserve the right to make changes and corrections without prior notice O 27 AE D 2 O E O Ga A O a 40 A a PR EI ae oe ee 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Zi Microphone Preamplifier Preamplifier or extension cable connector Symbol showing measurement status RUN STOP PAUSE RECORDING or HOLD Keypad LEFT key in graphic mode it moves the selected cursor towards lower values Keypad CURSOR key in graphic mode it allows to select one or both of the two cursors HOLD key it temporarily stops display updating MENU key it activates the different configuration menus of the instrument REC key recording combined with START STOP RESET it activates data recording on memory with Advanced Data Logger option When pressed for at least 2 seconds the dis played data can be stored in memory as a single record alternatively the Auto Store mode
57. RIPTION OF THE MENU FUNCTION Sii as 35 INSTRUMENT rra aio dial dali 36 a a 36 Sla 36 AI FORO dd IO ERO I eee 37 Mii 37 ue 38 SATTI ALDANA A O NO 38 RON 39 A A 39 MOANA Aaa 39 EDO RRA A AAN ARTT ATA Tnt 40 EVE RARA S 40 E a E E E ES 40 A ae 41 PROGRAMS GB lulu LL ha 42 NAVIGAFORGa eurini 42 CALIBRAFON ceneri lai 45 CAIO RIA RI RAI RITI TTI 47 EVO CITGO A I E E E ANE E EEA E IEE A AE E A E E RE A E E A NA EO S EE AA 49 ALOU CO ANOT AN cielo 51 VET CT OM IOI TOP AC CRASAS AA TA a aes aA nia 54 DUE SHO STU CUCA Aaa eae 54 FIRMWARE UPGRADE aca 0 iicaadatiniia id bicolore 54 SEMINARIO eE a RARA 54 BATTERY SYMBOL AND BATTERY REPLACEMENT u sccscccccccccccccccccccccccccccccccccccccccccccccccccccccccccees 55 INSTRUMENT STORAGE i LA DALILA LELLA ee 56 SERIATL AINDIEREA Paella dial ll 57 COMMUNICA TON PROTOCO Lilli 59 SE LOROUP SELU P allaccio lola 60 TEAOR 63 CTR OUP CS TATA aiga A ccna ad shag 63 DMEGROEERLMP Leelee 65 CONNECTION TOA MODEN lei 66 CONNECTION TOA PRINTER ls di 67 CONNECTONTO A PEWITHA USB TERA TNA 68 NN A A A 69 VErICA MORO proper driver Installa OH isecen asado 69 HD2010 MC MEMORY CARD READER esessesesecsesesecseseoccseoccsesecccsesecseseoccsesecccseseoseoseseseoscseseosesesceseseoseseseseoseseseosese 71 DESCRIPTION OF THE INTERFACE FOR MEMORY CARD HD2010 MC ccccceccesccccceccecceccccesceeccccescesceeccescescescuscuscs 71 PREPARATION OF A NEW MEMORY CARD a ii 71 CONNECTION OF
58. S corresponding to 0 125s and Is respectively A third time weighting called IMPULSE I has been defined for the identification of impulsive components presenting a time constant for increasing levels equal to 35ms while for decreasing levels it equals 1 5s The sound pressure level can be weighted both in frequency and in time For example Lar will in dicate a frequency weighted level with A filter and with FAST time constant Sound Pressure Peak Level referred to as Lp it equals the absolute value of the maximum sound pk 1t eq pressure in a given time interval expressed in decibel Sound pressure peak level can be frequency weighted Continuous Equivalent Sound Pressure Level referred to as Leg it is defined over a T time inter val as lp p s Lig 10 ve Od where T tv t is the time interval under examination fictitious variable for the integration over elapsed time up to t measurement instant p E the instantaneous squared pressure po the square of reference pressure The equivalent sound pressure level can be frequency weighted For example Laeqr will give the equivalent sound pressure level over T interval frequency weighted with A filter 121 Total Leg calculated by measuring partial Leg If you need to get the total Leq after measuring partial Leg you can use the formula i L T eat L 10 108 2 710 do 1 where T YT Example Let s suppose we measured Leg 80 dB
59. STOP RESET key and hold 1t down the replay will be performed in fast forward mode O REC key If REC is pressed and hold down for at least 2 seconds the displayed data are stored as a single re port You can also activate the automatic recording of the parameters displayed on the SLM screen see THE RECORD FUNCTION on page 30 When the Advanced Data Logger option 1s installed the REC key combined with START STOP RESET activates the data logging Starting from the STOP condition if you press REC and hold it down then press START STOP RESET the data logging of measured values is started To stop logging press START STOP RESET registration number date and time will be displayed Press ENTER to confirm RUN STOP RESET key If you press RUN while in stop all the initial values of the integrated measurements like Leq SEL MAX MIN levels will be first cleared RESET and then measurement starts Pressing the key again STOP the measurements will be stopped If pressed while in pause all integrated pa rameters will be cleared During the replay of stored data with the Advanced Data Logger option if you press this key while in pause the next data will be displayed if you press it and hold it down the replay will be executed in fast forward mode _ 95 SELECT key The SELECT key activates the adjustment mode of displayed parameters by selecting them in se quence Use the two arrows UP and DOWN to modify the va
60. STORAGE OF MEASUREMENTS WITH THE ADVANCED DATA LOGGER OPTION The HD2010UC sound level meter when provided with the Advanced Data Logger option of fers two different storage modes 1 The Continuous Recording press REC and START keys simultaneously implies the storage of the SLM screen page 2 samples a second together with the time profile of the A weighted sound pressure level with FAST constant time 8 samples a second It s also possible to store the data of Report and Events groups each consisting of 5 programmable parameters and full statistical analysis The data of the Event group are stored at the end of each event and the data of report group are stored at programmable intervals from 1 sec to 1 hour The REC symbol as status indicator shows when the sound level meter 1s recording If you press STOP recording will be stopped and you will be asked to confirm the title While recording you can press PAUSE to suspend recording When integration mode 1s multiple MENU gt gt Instrument gt gt Measurement gt gt Integration Mode MULT the integrated levels are cleared just before the beginning of each measurement cycle A special marker identifies the last acquired data per each cycle 2 The Auto Store mode can be activated either through the parameter MENU gt gt Recording gt gt Auto Store or by pressing REC and holding it down for at least 2 seconds with the sound level meter in STOP mode Th
61. See NoiseStudio Handbook online help for details OPTIONS UPGRADE HD2010UC options HD2010 00 Memory Module and HD2010 02 Advanced Data Logger can be purchased and installed after the purchase of the basic kit Advance Data Logger option if purchased can be activated directly by the user using Noise Studio software package Alternatively it s possible to send the instrument to Delta Ohm S r l technical service for upgrade To activate the new option it can be used the upgrade instrument options function of Noise Studio software using the activation code supplied after purchase Please see online manual of Noise Studio for details 54 BATTERY SYMBOL AND BATTERY REPLACEMENT The battery symbol mi in the upper right corner of the display constantly provides the charge status of the instrument batteries The more the batteries discharge the more the symbol gets empty Ball When the battery voltage reaches the minimum value for a correct operation the symbol flashes At this point only 5 minutes of autonomy are left and batteries should be replaced as soon as possi ble If the instrument is still used the battery voltage will decrease still further and the in strument cannot ensure anymore a correct measurement data recording is automatically in terrupted as well as data logging and the instrument goes into STOP mode Under a given level the instrument will automatically shut off Da
62. T time constant sampled 8 times per second or short equivalent level integrated every 0 125s or peak level calculated twice per second with any frequency weighting only C or Z for peak level The statistical analysis is done with 0 5dB classes for sound levels from 21dB to 140dB and provides graphic display of the sound level distribution of probabilities and percentile levels The graphs can be enabled in Menu gt gt Statistical Analyzer gt gt Display Statistics Disabling the displays does not influence the programmable L1 L4 percentile level calculation The following figure shows the level distribution of probabilities on the 6 minute measure ment of the noise issued by a climatic room During measurement an acoustic calibrator was switched on for about 2 minutes near the microphone The distribution of probabilities shows the different population of the examined noise clearly From lower levels the first peak about 63dBA reflects the room background noise caused by the ventilation system The second peak about 65dB concerns the cooling compressor activa tion The third peak about 69dB is the tone issued by the calibrator O N A N O 0 0 55 2 65 2 75 2 85 2 dB a ao M In the following figure the cumulative distribution for the same sample above can be seen The cumulative distribution is built from the 100 of the levels under the measured minimum and subtracting the probability of each you get 0 for the l
63. acity 99 TROUBLESHOOTING The HD2010UC sound level meter is provided with a diagnostic program DIAGNOSTIC CHECK that automatically checks the instrument main parameters This program can be run at any time to check the instrument operating conditions see description on page 54 One of the parameters being analyzed is the sensitivity of the amplification channel that includes through a charge partition circuit CTC the microphone capacity Measurement is made at I kHz DIAGNOSTIC CHECK 1 The DIAGNOSTIC CHECK program fails Replace batteries and try again after waiting for the end of the stabilization time and if the problem remains contact service CALIBRATION 1 The ELECTRIC CALIBRATION program fails Ensure that the instrument is not subject to high noise and or vibrations Try again after having waited for the end of the stabilization time and if the problem re mains run the ACOUSTIC CALIBRATION program 2 The ACOUSTIC CALIBRATION program fails Ensure that the instrument is not subject to high noise and or vibrations and that acoustic calibrator and sound level meter are steadily aligned and that the microphone is properly plugged in the calibrator cavity Check that the seal rubber ring is present and undamaged Try again after having waited for the end of the stabilization time and if the problem re mains load the factory calibration following these steps e Ensure that acquisition is on STOP e Remove one
64. al Description 2 Wo DP Datum 4 IO DM Datum SO 6 Imput VBUS Power supply 5V 8 GND Reference ground While the sound level meter is connected to an active terminal DCE active via the RS232 in terface the auto power off is disabled and the instrument cannot be switched off If the instru ment 1s off the connection to an active terminal DCE active will turn 1t on Standard parameters of the instrument serial transmission are e Baudrate baud 38400 e Parity None e N bit 8 e Stop bit l e Protocol Hardware Data transmission speed can be changed through the Baud rate parameter inside the menu MENU gt gt Instrument gt gt Input Output gt gt Baud Rate see page 37 The available baud rates are 230400 115200 57600 38400 19200 9600 4800 2400 1200 600 300 The other transmission parameters are fixed The 2010UC is provided with a complete set of commands to be sent via the serial port of a PC SS COMMUNICATION PROTOCOL The command consists of ASCII strings with a variable length ending in CR LF The instrument provides always a response after a command has been received if the command 1s not accepted the response string 1s always NAK CR LF It is possible to disable the response when it is not expressly requested by the command modifying the VERBOSE setup parameter see the SET paragraph Commands are divided into 5 groups as shown in the following table N
65. alled with the Continuous Recording mode a se ries of values is stored every 0 5s together with the parameter displayed in the PROFILE screen which corresponds to the A weighted sound pressure level with FAST time constant computed 8 times a second Each sample corresponds to the highest sound level Larmx calculated every 0 125s on the level measured every 7 8ms SELECTING PARAMETERS Some measuring parameters integration interval measuring range and the 3 parameters can be changed directly via the SLM screen Pressing SELECT you choose the different parameters in sequence While the selected parameter flashes you can change it with the UP and DOWN keys If a parameter with attribute 1s selected like for example LFp FAST weighted pressure level the relative frequency weighting will also flash A in the example in the figure In this case pressing UP and DOWN you can modify the selected parameter without changing the attribute for example if you press DOWN you can go from LFp A weighted to LSp A weighted Pressing RIGHT you ll jump to the attribute selection which will be the only one to flash Use then the UP and DOWN keys to change the attribute For example if you press UP you can go from A weighted LSp to Z weighted LSp Pressing SELECT let you choose the next parameter pressing ENTER or automatically after approximately 10s will let you exit the selection mode Also the integration mode see page 26 can be set using t
66. at the arrow printed on the reader is turned upwards The reader has to be connected to the sound level meter in vertical position 3 Insert the memory card in the slot of HD2010 MC interface 4 Switch on the sound level meter and set the menu item MENU gt gt General gt gt Input Output gt gt Serial device on MC 5 The sound level meter identifies the device The display of the sound level meter shows MC connected and the remaining dimension of memory The LED on the card reader signalizes the connection 6 If the display visualizes Connection failed check carefully if the memory card has been in troduced correctly into the slot and if the connector is plugged in properly When HD2010 MC interface is connected to the sound level meter any recording is automati cally sent to the memory card rather than to the internal memory of the sound level meter During recording the LED on the reader flashes upon receipt of every data package When memory is used up entirely the recording will be interrupted To disconnect HD2010 MC interface from the sound level meter 1 Switch off the sound level meter 2 Disconnect HD2010 MC interface NOTE Slipping off the memory card while the sound level meter is running and interface is connected causes the loss of all data In order to replace the memory card switch off the sound level meter DI For disabling HD2010 MC temporarily Set the menu item ME
67. bar The parameter chosen for statistical analysis can be changed without accessing the menus but sim ply using the SELECT keys the four arrows UP DOWN LEFT and RIGHT and ENTER for more details see Selecting Parameters on page 16 22 Using the Cursors The CURSOR LEFT and RIGHT keys on the keypad enable and move the cursor The second line at the top of the display shows the percentile level indicated by the cursor Press CURSOR again to disable the cursor 99 EVENT TRIGGER FUNCTION The Event trigger function is available with the Advanced Data Logger option and can be enabled only with the single integration mode During measurement this function can be used to isolate a sound event identifiable by sound level variation or by synchronization to an external sig nal or manually by pressing a key The acoustic descriptor used by the trigger function is selected in the PROFILE view Menu gt gt Trigger gt gt Source LEV The level variation that triggers the event can be positive or negative Menu gt gt Trigger gt gt Trigger Polarity and the trigger threshold Menu gt gt Trigger gt gt Trigger Threshold and Menu gt gt Trigger gt gt Bottom Threshold can be different from the deactivation threshold Menu gt gt Trigger gt gt Trigger Threshold and Menu gt gt Trigger gt gt Bottom Threshold The following figure shows an example of a positive polarity sound event capture The sound lev
68. cal and electronic equipment marked with this symbol cannot be disposed of in public landfills According to the UE Directive 2002 96 EC the European users of electrical and elec tronic equipment can return it to the dealer or manufacturer upon purchase of a new one The illegal disposal of electrical and electronic equipment is punished with an administrative fine This guarantee must be sent together with the instrument to our service centre IMPORTANT Guarantee is valid only if coupon has been correctly filled in all details Instrument Code O HD2010UC Serial number RENEWALS Date Date Inspector Inspector Date Date Inspector Inspector Date Date Inspector Inspector CE CONFORMITY C Safety requirements for electrical equipment EN61010 1 EMC Generic standards Immunity for industrial environments EN61000 6 2 2005 LAY EMC Generic standards Emission standards EN61000 6 3 2007 db Electrostatic discharge immunity test EN61000 4 2 level 3 Radiated radio frequency electromagnetic field immunity test EN61000 4 3 level 3 RoH Electrical fast transient burst immunity test EN61000 4 4 level 3 x 2002 951567 Immunity to conducted disturbances induced by RF fields EN61000 4 6 Electromagnetic Interference Line conducted disturbances EN55022 2007 class B Electromagnetic Interference Radiated emissions IEC CISPR 22 class B 128
69. cond up to 1 hour for each interval it is then possible to calculate a set of 5 integrated levels choosing from Leq max min levels SEL and statistical levels These data are not directly available on the display but can be stored activating continuous re cording mode The report levels can be evaluated directly on the sound level meter display using the Navigator program selecting the Report mode for the replay Interval acquisition can be activated only in SINGLE integration mode DO MULTIPLE INTEGRATION REQUIRES THE ADVANCED DATA LOGGER OPTION When the integration mode 1s at intervals the sound level meter automatically makes a con tinuous sequence of acquisition intervals having a duration equal to the integration time set through the parameter MENU gt gt Instrument gt gt Measurements gt gt Integration interval Each acquisition interval starts clearing the integrated levels and the Tint symbol on the SLM page flashes This integration mode together with the Auto Store function MENU gt gt Instrument gt gt Re cording gt gt Auto Store allows to record the SLM parameters at intervals equal to the set integration time see THE RECORD FUNCTION on page 30 Automatic recording occurs at the end of each integration interval When the Auto Store function is active the REC symbol will flash alternating with the indi cator of the sound level meter acquisition up on the left side of
70. continuous recording The automatic Auto Store and continuous recording modes are available with the Advanced Data Logger option MANUAL AND AUTOMATIC SINGLE RECORDING When only the REC key is pressed for at least 2 seconds the displayed screen will be re corded as a single record When you press REC and before the instrument stores the active screen you will be asked to confirm the recording title containing order date and number This operation can be performed in RUN HOLD PAUSE and STOP modes With the Advanced Data Logger option when the single recording is activated while the instrument is in STOP mode you will be first asked to choose between automatic and manual storage Record data AUTO MAN CURSOR If the manual recording has been selected the instrument will behave as per the above description Single record recording If on the contrary the automatic recording mode AUTO Advanced Data Logger required has been selected the sound level meter is set for Auto Store mode The parameter MENU gt gt Re cording gt gt Auto Store will be activated and the REC symbol blinks over the status indicator Press START to begin automatic recording as soon as the measurement time reaches the set integration time the parameters shown on the SLM screen are recorded automatically If the inte gration mode is single the acquisition will be stopped If it is multiple on the SLM a new integra
71. corresponding to a 20 uPa 0 00002 Pa pressure variation will be indicated as 0 dB The sound level corresponding to a 20 Pa sound variation will be indicated with 120dB a level at the limit of the pain threshold An increase by 10 times of the sound pressure corresponds to a level increase by 20 dB while an increase by 100 times of pressure corresponds to an increase in level by 40 dB the sound level increases by 20 dB against each increase of a factor 10 of the sound pressure Similarly the increase of the level 1s equal to 6 dB for each doubling of the sound pressure The use of decibels to indicate the sound level has besides the evident advantage to reduce the measurement numeric range the advantage of providing a good approximation of the audible perception that follows the sound pressure on a logarithmic scale Not all pressure variations are audible When a pressure variation 1s due for example to cli matic variations it changes too slowly to be heard but if it is fast like for example that produced by striking the drum or by bursting a balloon it can be heard by the human ear and is consequently identified as a sound The number of pressure oscillations second is called sound frequency and is measured in cycles per second or Hertz Hz The audible frequency range extends between approximately 20 Hz up to 20 kHz Under 20 Hz we enter the infrasound field while over 20 kHz we enter in that of ultrasounds Hearing sensitivity
72. crement The linearity range is almost independent of frequency in the 31 5 Hz 12 5 kHz interval and it is shown in the following table according to the input gain E LpkZ Lower Limit Upper Limit LpkC n The starting level for the linearity range detection matches the reference level 94 dB at 1 kHz With different frequencies the starting level takes into account the attenuation of the fre quency weighting being measured In the secondary fields the starting level is subject to the same increment of the input gain Integration Time It can be set from a minimum of 1s to a maximum of 99 hours Measurement Dynamics with Electromagnetic Fields Minimum measurable level equal to 60dBA with carrier from 26 MHz to 1 GHz and amplitude equal to 10V m modulated 80 at 1 kHz Reference Conditions The measuring range is that with input gain equal to 10 dB The level corresponds to 94 dB The acoustic calibration can be performed at a sound level included in the range 94dB 124dB The reference direction of the acoustic signal is that of the preamplifier longitudinal axis The reference acoustic field is the free field Operating conditions Storage temperature 25 70 C Operating temperature 10 50 C Working relative humidity 25 90 RH not condensing Static pressure 65 108kPa Protection degree IP64 In case of condensation growth 1t must evaporate completely before using the sound level
73. crophone UC52 is Free Field FF since it has a frequency response optimized for the free field Set the pa rameter to Random Incidence RI to activate the correction for random incidence sound This setting 1s necessary to carry out measurements according to ANSI standards The random incidence correction is not available on the HD2010UC Class 2 When HD WME microphone rain protection is used for aircraft noise O incidence meas urements the FF setting must be used while RI setting must be used for community noise 90 incidence measurements e g road traffic noise e Wind Shield Correction Allows correcting the frequency response of the sound level meter when the HD SAV windshield provided with the sound level meter or the HD WME outdoor shield 1s used When this parameter is set to SAV or WME the sound level meter frequency response is corrected for the windshield or the outdoor shield presence respectively The ran dom incidence correction is not available on the HD2010UC Class 2 For additional details on applied microphone correction please see UC2 microphone manual 40 SEQUENCER The Sequencer menu needs the Advanced Data Logger option e Timer programmable acquisition delay in seconds minutes or hours up to a maximum of 99 hours see paragraph Delayed acquisition timer on page 34 41 PROGRAMS The item PROGRAMS PROG key includes the following functions Navigator to
74. ctor for external power supply 5 5mm 2 1mm socket It requires a 9 12Vdc 300mA power supply The positive pole power supply must be connected to the central pin Jack 2 5mm or the analogue DC A weighted output with FAST constant time up dated 8 times s Jack 3 5 mm for the analogue LINE un weighted output placed on the right side of the conical part detail CERTIFICATO DI CONFORMITA DEL COSTRUTTORE MANUFACTURER S CERTIFICATE OF CONFORMITY rilasciato da issued by DELTA OHM SRL STRUMENTI DI MISURA DATA DATE 2012 05 29 Si certifica che gli strumenti sotto riportati hanno superato positivamente tutti test di produzione e sono conformi alle specifiche valide alla data del test riportate nel la documentazione tecnica We certify that below mentioned instruments have been tested and passed all production tests confirming compliance with the manufacturer s published specification at the date of the test Le misure effettuate presso un Laboratorio di Taratura Accredia sono garantite da una catena di riferibilita ininterrotta che ha origine dalla taratura dei campioni di prima linea del Laboratorio presso l istituto metrologico nazionale Measurements performed in an Accredia Calibration Laboratory are guaranteed by a uninter rupted reference chain which source ts the calibration of the Laboratory first line standards at the national metrological institute Tipo Prodotto Fonometro I ntegratore Product Ty
75. d noise The free field is significantly disturbed by the closeness of rigid walls capable of reflecting sound levels comparable with those due to the acoustic pressure waves coming directly from the source The acoustic field in an environment where sound waves reflected by walls are dominant and therefore where the sound level is determined by sound pressure waves coming from all directions is called diffuse field While measurements in indoor environments are usually treated as diffuse field measurements those outdoor are generally treated as free field measurements Since the microphone has dimensions comparable to the highest frequencies of the sound spectrum it is designed to get an optimized response for a given acoustic field There are three types of microphone for free field diffused field and pressure The microphone for free field is designed to have a constant sensitivity at any sound field frequency for sound signals coming from the front side making automatic adjustments to high frequencies to compensate the increase in pressure at the membrane level due to its presence The microphone for diffuse field 1s instead designed to have a constant sensitivity at all frequencies for sound signals coming from all directions The microphone for pressure measurements 1s used for laboratory measurements even though hav ing a characteristic similar to that of a microphone for diffuse field might also be used in reverber a
76. date will stop Meanwhile the instrument goes on measuring to con tinue display updating just press the HOLD key When the continuous recording is activated and the Tint time goes over the acquisition 1s stopped automatically If you press HOLD during the measuring phase the display update will be temporarily inter rupted When HOLD 1s pressed again the updating will continue Even if the display is not updated the instrument will go on measuring If you press PAUSE the acquisition will be temporarily suspended While in pause press START STOP RESET to clear the graph Press PAUSE once more to start measuring again If you press CURSOR at any moment a cursor will be activated If you press CURSOR once more a second cursor will activate while if you press it for the third time both cursors will be ac tivated in tracking Use the LEFT and RIGHT arrows of the keypad to shift the selected cursors into the desired position to indicate the measured level and the corresponding acquisition time Press CURSOR again to disable cursors PRINT at any time to print the on screen data To activate the continuous printing Monitor press and hold down PRINT for at least 2 seconds The flashing letter M over the status indicator indicates that the Monitor function has been activated The Monitor function remains active even when jumping to other measuring views and can be disabled pressing PRINT again or START STOP RESET to stop measurement
77. described only in statistical terms Among the non stationary signals can be identified continuous and transitory signals Continuous Non stationary Signals these are the signals that never have a null value Transitory Non stationary Signals these are the signals that have a non null value only in deter mined time intervals Stationary signals can be analyzed over different time intervals obtaining comparable and repeat able mean levels A frequency analysis can be made with a sequential spectrum analyzer measuring the sound level band by band until the interested spectrum is covered Spectra of periodical station ary signals will be striped which means that they will have non null levels only in the bands with characteristic nominal frequencies Random stationary signals will have instead a continuous spec trum An example of deterministic stationary signals could be a note or a chord played by a musical instrument while for random stationary signals the example might concern car traffic noise or air conditioning noises 111 Non stationary signals have sound levels depending both on the period of measurement and on in tegration time The time taken for the analysis 1s critical for this type of acoustic signals and the fre quency analysis has to measure all levels in every band of the spectrum at the same time The ana lyzer suitable to this kind of measurement is called to operate in real time Among the non stationary s
78. display MULTI integration mode prevents the possibility to use the Report Interval parameter to re cord at defined time intervals and over triggered events Statistical analysis and integrated levels are zeroed at the beginning of each integration interval The following table gives the different measurement and storage modes of the HD2010UC Auto Store Advanced Data Logger option Continuous Recording Advanced Data Logger option Integration Measurements Single Recording Press to start SINGLE MULTIPLE The integration ends when t T Int enters in HOLD mode and it is possible to continue by pressing HOLD or to stop with Press to start Automatic stop when t T Int with recording of the SLM Press to start The integration of the sound levels occurs according to intervals equal to T Int The integrated levels are cleared at the beginning of every interval Press to start The integration of the sound levels occurs according to intervals equal to T Int The integrated levels are cleared at the beginning of every interval and recorded at the end 28 Press Co to start Automatic stop when t T Int to start Press Ce F Continuous recording with LAST marker at the end of each integration period Stop by pressing Press to record the displayed data Press Ce to record the displayed data PRINT AND MONITOR FUNCTIONS If you press and soon release the
79. display stored data Advance Data Logger required Electric and Acoustic Calibration Diagnostic Check diagnostic test of instrument Data copy on MC this program allows to copy measurements stored on sound level meter s flash memory onto an external Secure Digital memory card please refer to related chapter on page 73 Each program is here below described in details NAVIGATOR This program available with the Advanced Data Logger option allows to access the data stored on the instrument display and print them with no need to download them to a PC It works both with single session data and with multiple ones Press PROG gt gt Memory Navigator gt gt SELECT to access it The following screen will appear 2003 01 01 10 00 00 Batt 15 Mem Ad 54 Push CLEAR to erase memory SELECT to access data EXIT CLEAR SELECT D CC If you press CLEAR the content of the instrument memory will be cleared The user will be asked a confirmation before clearing Press SEARCH to access the first session of stored data on memory 42 2003 01 01 10 00 00 Batt 15 Mem Ad 54 Type N Date Mult 00001 2003 01 01 ABC EXIT LOAD NEXT The following data are indicated for each file the type single multiple or automatic the progressive number given by the instrument upon logging and the date Press NEXT to jump to the next file press LOAD to download the current file If you press LOAD the instrument
80. displayed data press REC and hold it down for at least 2 seconds then select the manual storage option Press PRINT if you want to send displayed data to the serial output While display update is paused HOLD mode the sound level meter continues measuring and calculating the sound levels press HOLD to let display update start again If you do not wish to continue beyond the set integration time press STOP to interrupt the acquisition When the integrating mode is SINGLE and the sound level continuous recording 1s active the acquisition is automatically ended once the set integration time is elapsed The PAUSE CONTINUE key can be used to suspend the calculation of integrated levels tem porarily while instant levels are still being measured During a pause and as far as the integrated levels displayed on the SLM page are concerned you can delete the last integration seconds through the Back Erase Function data exclusion see page 16 The monitor function 1s not affected by the acquisition pauses The continuous recording function suspends data storage during the acquisi tion pauses and automatically stores a marker indicating the pause duration and the possible use of the erase function The sound level meter has an additional timer for acquisition over time intervals MENU gt gt Gen eral gt gt Measures gt gt Report With this function it is possible to split the measurement time over programmable duration intervals form 1 se
81. dvanced Data Logger option required to view a file saved in the instrument memory see page 42 Just on the right of the symbol indicating the logging mode there is the symbol showing a possible overload or under range An arrow directed upwards indicates that the input level has ex ceeded the maximum measurable level while an arrow directed downwards indicates that the input level is lower than the minimum measurable level The maximum measurable level corresponding to the selected measurement range is given in the technical specifications see page 74 The minimum measurable level is 80 dB lower than the maximum one The noise levels for each frequency weighting are listed in the technical specifica tions Using an appropriate parameter MENU gt gt Instrument gt gt Measurement gt gt Overload Level you can program the maximum measurable limit at lower levels chapter on page 74 An empty arrow indicates that the limit has been exceeded while a full arrow indicates that the overload is in progress The integration time Tint programmable between 1s and 99h is displayed to the right of the overload indicator When the integration mode is set on MULT the Tint symbol on the SLM will flash see the DESCRIPTION OF THE DIFFERENT INTEGRATION MODES chapter on page 26 In the right corner at the top there is the battery symbol The more the symbol 1s empty the more the battery has run down When the instrument autonomy
82. e USB interface combined with the flexibility of the RS232 interface allows quick data transfers from the sound level meter to the PC mass storage but can also control a mo dem or printer For example in case of lengthy recordings you can activate the Monitor function This function allows to send the displayed data to a PC via the RS232 serial interface to be directly stored on the PC mass storage The sound level meter can be completely controlled by a PC through the multistandard serial inter face RS232 and USB by using a special communication protocol Through the RS232 interface the sound level meter can also be connected to a PC via modem The calibration can be made either using the provided acoustic calibrator type 1 according to IEC 60942 or the built in reference generator The electric calibration employs a special preamplifier and checks the sensitivity of the measuring channel microphone included A protected area in the non volatile memory reserved to factory calibration is used as a reference in the user s calibra tions allowing keeping instrument drifts under control and preventing the instrument from wrong calibrations The check of the complete sound level meter functionality can be made directly by the user on site thanks to a diagnostic program The HD2010UC sound level meter can perform the measurements required to evaluate workers noise exposure ISO 9612 11 and D Lgs 81 08 The selection of the personal
83. e is 146 dB The level of the electrical signal applicable to the microphone input despite the replacement of the microphone capsule with the proper capacitive adapter must not exceed 10Vrms LINE Output 3 5mm mono jack Preamplifier output signal Unweighted output protected against short circuit Gain 3 mV Pa and 30 mV Pa respectively for an input gain equal to 0 dB and 20 dB not calibrated Linearity 100 dB with maximum output level equal to 1 2Vrms Series impedance 1kQ Typical Load 100kQ DC Output 2 5mm mono jack Short circuit protected output A weighted output with FAST time constant updated 8 times s Gain 10 mV dB Linearity 80dB Series impedance 1kQ Typical Load 100kQ IS a Serial interface Socket 8 way M12 Type RS232C EIA TIA574 or USB 1 1 or 2 0 not insulated Baud rate between 300 and 230400 baud Data bits 8 Parity None Stop bits 1 Flow control Hardware Cable length max 15m Extension Cable for the Microphone The microphone preamplifier can be connected to the sound level meter body through an exten sion cable up to 10m long CPA The sound level meter specifications are not significantly modified by the cable presence STATISTICAL ANALYSIS Acoustic descriptor Larp or Leg Short or Lox Sampling 1 8 s Classes from 0 5 dB Measurement range 30 dB 140 dB 4 percentile levels programmable between L to Log Statistical graphs calculation and disp
84. e time marker when the event is closed the record containing the Event group information is logged When the event trigger uses the Profile view sound level as source Menu gt gt Trigger gt gt Source LEV the event data are recorded only when the trigger threshold Menu gt gt Trigger gt gt Trigger Threshold exceeds the minimum duration time Menu gt gt Trigger gt gt Minimum Duration The following figure shows the recording flow for the Measurement Report and Event groups The Measurement group recording is enable only during the event outside the events only Reports are recorded In the following example a report is recorded every 10s 10s 0 5s 10s Fig 11 Recording flow for the Measurement Report and Event groups When the trigger threshold is exceeded for a shorter period than the minimum duration time the re cord containing the Event group information is not logged 33 Delayed acquisition timer A timer is available to enable data acquisition according to a programmable delay of up to 99 hours To perform an acquisition with delayed start the recording parameters need to be set first and then the delayed acquisition timer programmed in the parameter Menu gt gt Sequencer gt gt Timer After programming the sound level meter you only need to press the REC and RUN keys together as if starting a logged measurement confirm with the YES key The instrument switches into stand by and turns
85. easurements are carried out e Position the microphone according to the type of acoustic field considering also the correction made by the sound level meter if any e The choice of frequency weighting and of time constant usually depends on the standard used to carry out measurements e Consider that the presence of an operator during measurement alters the sound field thus keep the instrument as far as you can from your body For better accuracy position the sound level meter on the tripod especially for spectral analyses Best results are obtained if only the pream plifier is mounted on the tripod and the extension cable is used to connect it to the instrument CLASSIFICATION OF ACOUSTIC SIGNALS Acoustic signals can be classified according to the possible analysis techniques First of all we can divide the acoustic signals into two classes stationary and non stationary signals Stationary Signals these are the signals which average values mean value equivalent value etc do not depend on time Among the stationary signals there are the deterministic and the random signals Deterministic Stationary Signals these are the stationary acoustic signals that can be described with a function of time that is as a sum of sinusoidal signals These signals are periodical if the si nusoidal components are all multiples of a main frequency They are also called quasi periodical Random Stationary Signals these are the signals that can be
86. econds 1 2 5 10 20 30 minutes and 1 hour A re Rae port time can be set only for the single integration mode see parameter Integration mode This parameter needs the Advanced Data Logger option o Max Back Erase maximum erase interval of data recorded in SEM mode The available values are 5s 10s 30s and 60s the erase interval is settable with 1s 2s 5s or 10s steps respectively See description on page 16 o Exchange Rate is used together with DOSE Threshold and DOSE Criterion in DOSE calculation It represents the variation of the sound pressure level corresponding to the double or the half of the exposure maximum time with the same Criterion Level indicated as DOSE Criterion Its value can be equal to 3dB 4dB or 5dB DOSE Threshold it is the noise level below which the DOSE is not increased The value can be set in the OdB 140dB interval with 1dB steps DOSE Criterion it is the noise level providing a DOSE equal to 100 after an 8 hour ex posure The value can be set in the 60dB 140dB interval with 1dB steps Overload Level according to the selected input gain the instrument provides two measur ing ranges the former with a 130dB upper limit the latter with a 140dB one If the sound level exceeds the 131dB and 141dB limits respectively the display will highlight the over load indication A and A The indication can be activated also at lower input levels pro gramming this pa
87. ed It 1s stabilizing within few minutes to a level just above 71dBA Considering an intermittent source of noise for example a train passing by it 1s obvious that the equivalent level can give a measurement of the mean energy level after considering many passages If you wish to measure the energy content of a single passage you need to use a different measurement parameter the Sound Exposure Level symbols SEL or Lg IEC 60804 IEC 61672 The sound exposure level is defined as the constant sound level for 1 second that contains the same energy of the event being examined By standardizing the SEL value 1 second it is possible to compare sound events with different durations STATISTICAL ANALYSIS If you need to examine from a statistical viewpoint the distribution in time of the sound pres sure level you have to use the percentile levels A percentile level symbolized as Ly is defined as the sound level being exceeded by the X percentage during the total time To calculate the percen tile levels you first need to classify the sampled sound level according to regular intervals usually 1 8s in width classes usually between 0 1dB and 2dB At the end of the acquisition the probability 107 for each class is calculated by dividing the sampling frequency by the total number of samples The result is the sound level distribution of probabilities shown below After this the cumulative distribution is calculated This 1s based o
88. ed by the sound pressure in a given time interval The response time of the peak level is very fast lt 100us and it is able to meas ure the sound level of very short sound events for example a gun shot with sufficient accuracy EQUIVALENT SOUND PRESSURE LEVEL The approximation obtained by considering the levels with FAST or SLOW time constant as short term averages is quite rough If the sound during its propagation transports energy it is impor tant to account for the duration of the sound event in order to interpret the energy content correctly 106 This is particularly important in assessing the impact of the sound produced by machines or general pollution sources on the auditory apparatus It 1s obvious that a strong noise generates a growing damage proportional to exposure Evaluation of potentially harmful noise is therefore easy with constant level sounds If the sound varies in time you have to use a measurement parameter defined in the interna tional standards IEC 60804 recently replaced by IEC 61672 called equivalent level symbol Leg The equivalent level is defined as the constant level having the same energy content of the fluc tuating level in the period being examined The A weighted equivalent level Lac will be used to measure the energy content and then the harmful potential of a fluctuating noise source during a given period an AAN NATI In the figure the equivalent level profile is highlight
89. el Lar exceeds the trigger threshold for time TO and later the bottom threshold for time T2 Time profile at 125 ms started 05 05 2005 14 22 21 LAFmax Trigger Threshold Bottom Threshold Fig 8 Description of the event trigger parameters To prevent short duration pulses being detected as sound events a minimum trigger duration can be set up to a maximum of 10s Menu gt gt Trigger gt gt Minimum Duration If the threshold is exceeded for less than the set time the event is neglected Also a minimum deactivation duration can be set when the deactivation threshold is exceeded the event close is delayed for the set time up to a maximum of 255s Menu gt gt Trigger gt gt Stop Delay In the example since the trigger conditions exceed the minimum duration that 1s they persist at least for time T1 the event levels integration begins including the 2 seconds before the threshold 1s reached pre trigger This pre trigger time cannot be modified The event levels integration ends at time T3 that is after the stop delay from the T2 time corre sponding to the bottom threshold being reached The event trigger feature can be activated also by pressing the ENTER key Menu gt gt Trigger gt gt Source MAN In this case the minimum duration parameter has no effect and the event begins as soon as the trigger is detected 24 Per each event identified 2010UC calculates the following e 5 programmab
90. el meter it is necessary to use the Navigator program To cancel the data of the card use only the formatting function of Noise Studio the erasure of single files contained in the memory card is not foreseen The Navigator program is not able to manage registrations which have been effected with external devices as interface for HD2010 MC memory card TECHNICAL SPECIFICATIONS Type of card MMC and SD Maximum capacity 2GB Power supply provided by sound level meter Function indicator LED on the reader Connector 8 pole female M12 lt A z TECHNICAL SPECIFICATIONS The HD2010UC sound level meter is a type 1 or 2 integrating sound level meter with statistical analysis and optional logging HD2010UC complies with the following standards EC 61672 2002 5 Class 1 or Class 2 Group X EC 60651 2001 10 Class 1 or Class 2 EC 60804 2000 10 Class 1 or Class 2 ANSI S1 4 1983 Type 1 or Type 2 Microphone Models UC 52 inch pre polarized OV microphone with 20 mV Pa sensitivity frequency response optimized for Free Field Preamplifier models For 2 inch microphones pre polarized with 20 mV Pa sensitivity HD2010PNE2 with connection for UC52 Y inch microphone and driver for extension cable up to 10mt This preamplifier is provided with CTC device for electrical calibration it can be directly plugged into the HD2010UC o using the extension cable HD2010PNE2W heated preamplifier with connection for UC52 Y inch microp
91. en select the AUTO option when you are requested to choose the re cording option Activating the Auto Store recording mode together with the multiple integra BF tion mode MENU gt gt Instrument gt gt Measurement gt gt Integration Mode MULT allows to re cord at intervals equal to the set integration time MENU gt gt Instrument gt gt Measurements gt gt Integration interval the data displayed on SLM screen Set in this way and once the integration time has been reached the sound level meter will first record data then set all integrated levels to zero and finally start a new integration period The flashing REC symbol overlapping the status indicator shows that the sound level meter 1s re cording Press START to start recording and STOP to stop it A flashing REC over the RUN status indicator shows when the sound level meter is recording Press REC with the instrument in STOP to disable the Auto Store and the multiple integration modes The Auto Store re cording mode combined with the single integration mode MENU gt gt Instrument gt gt Measure ment gt gt Integration Mode SINGLE allows to record automatically data displayed on SLM OCTAVE and T OCTAVE with option screens at the end of the set integration interval MENU gt gt Instrument gt gt Measurements gt gt Integration Interval the measurement will be automatically interrupted immediately after recording Single screen storage is obtained by p
92. entered at 1 kHz will consider the sounds between 707 Hz and 1414 Hz for octave and between 891 Hz and 1122 Hz for third octave bands The analysis 40 dB result is usually shown in a graph called spectrogram where the sound levels are represented in 20 dB graphic format for each of the bands in which the sound spec iii trum has been divided se The analysis result is usually 100 160 250 400 630 16k 25k sak 10k 18k shown in a graph called spectro 80 dB 60 dB 104 gram where the sound levels are represented in graphic format for each of the bands in which the sound spectrum has been divided TIME CONSTANTS AND EXPONENTIAL WEIGHTING Further processing of the microphone signal 1s needed when fluctuating sound levels have to be measured To evaluate a sound level varying with time two type of instantaneous responses have been defined by international standards IEC 60651 IEC 61672 One named FAST simulates the ear response the other one named SLOW provides a sound level quite stable even in case of fluc tuating noises The choice of the type of response of the level meter combines with the selection of frequency weighting to provide a wide spectrum of possible measuring parameters for example the A weighted sound level will be measured with a FAST time constant Lrap to simulate the auditory sensation The FAST time constant is equal to 0 125s while the SLOW constant equals 1s When measurements with a
93. ery new memory card needs to be formatted before use by means of the appropriate function of the Noise Studio software The formatting function requires the PC on which the Noise studio Software has been installed to be equipped with a PC Memory card reader not included in supply Those are typically included in most recent laptops and desktop computers Optionally it is possible to use an external memory card to be connected to an USB port How to format a memory card 1 Ifthe PC isn t provided with a SD MMC card reader connect an external device to the USB port of the PC 2 Start up the Noise Studio software 3 Press the key Instrument management in Noise Studio press the key Memory Card Format ting 4 Select the path of the card to be formatted and confirm with ENTER On the following screen ensure that the parameter File System FAT has been selected and press START the card will be formatted N 71 6 When the message Formatting completed appears press OK for confirmation and CLOSE to exit 7 Close the Noise Studio software 8 The formatting has been accomplished and the card is ready for use CONNECTION OF HD2010 MC TO THE SOUND LEVEL METER AND USE OF THE MEMORY CARD Connection of the HD2010 MC 1 Switch off the sound level meter 2 Connect HD2010 MC to the M12 connector of the sound level meter ensuring the correct fas tening of the connector s ring nut While inserting please make sure th
94. estecescasceseecescesceseeses 101 ASP OON A A A E 102 A AA a Nee a A A A ie aa 104 PrE We nn ra aloni coed Laden 104 VIa 104 Time Constants and exponential weighting iii 105 WR al 105 Equivalent SOUNG Pressure Lv aa 106 SAN NICO ARRE O ee CIO 107 NONO Rigi E N i pn 109 ACOS NO AAA ohi trilli ell illa ii el ml alice ei 109 EMIOMMNO LIA lai 110 Preca ons and General Tules Of eil ale AA A EAA 110 Class Canon OF OCOUSTIC SI ONGS iii 111 AS MICROPHONE OUTDOOR PROTECTION HD WME ASSEMBLY DISASSEMBLY AND MAINTENANCE 113 AAO BEN ONS ini 120 126 127 Bello GUARANTEE E TERMS OF GUARANTEE All DELTA OHM instruments are subject to accurate testing and are guaranteed for 24 months from the date of purchase DELTA OHM will repair or replace free of charge the parts that within the warranty pe riod shall be deemed non efficient according to its own judgement Complete replacement is excluded and no damage claims are accepted The DELTA OHM guarantee only covers instrument repair The guaran tee is void in case of incidental breakage during transport negligence misuse connection to a different voltage than that required for the appliance by the operator Finally a product repaired or tampered by un authorized third parties is excluded from the guarantee The instrument shall be returned FREE OF SHIPMENT CHARGES to your dealer The jurisdiction of Padua applies in any dispute The electri
95. evels over the measured maximum 2100 The percentile levels are calculated interpolating the cumulative distribution The statistical analyzer resets the classes at the beginning of measurement and if no report time has been selected it will continue accumulating the statistic until the end of the measurement If a re port time is selected menu Main gt gt Measurement gt gt Report time or the multi mode is acti vated the statistic is automatically reset at the beginning of each interval 20 The HOLD key does not affect this display mode When the continuous recording 1s activated with the single integration mode the integration time acts like a timer for data acquisition stopping automatically the measurement when the time is elapsed When the level integration is performed in multiple mode the statistical graphs are cleared at the beginning of every interval These screens are not recorded in the Auto Store mode and can be recorded only as a single datum therefore they are not available for continuous recording These display modes do not have a specific Monitor function The statistical analysis is sent to the serial interface together with other measurements when the monitor function is enabled in MEASUREMENT see paragraph PRINT AND MONITOR FUNCTIONS on page 29 Level distribution of probabilities This function is available with Advanced Data Logger installed Displayed Parameter Acquisition time
96. ged without accessing the menus but simply using the SELECT keys the four arrows UP DOWN LEFT and RIGHT and ENTER for more details see Selecting Parameters on page 16 Using the Cursors To activate cursors on the graph press CURSOR on the keypad If you press CURSOR re peatedly either L1 or L2 cursor or both AL cursors in tracking will be activated in succession 21 the selected cursor will flash Use the LEFT and RIGHT arrows on the keypad to move the selected cursor on the graph The second line at the top of the display shows the level and central frequency of the class and the relevant probability indicated by the active cursor or the probability for the levels in the interval be tween the two cursors when they are both active Press CURSOR again to disable the cursors Percentile Levels Graph The graphic display is available for the sound level distribution of probabilities and also for the percentile levels Advanced Data Logger required Displayed Parameter Acquisition time Maximum Level Scale Factor Wideband Level Minimum Level Sampling Interval Percentile Index Fig 7 Description of the percentile level display The figure shows the percentile levels graph corresponding to the distribution of probabilities shown in the above paragraph From the sound level distribution of probabilities you can calculate the cumulative distribu tion of probabilities on the same classes The cum
97. gnostic Check Use the UP and DOWN arrows to select the calibration to be carried out 2004 01 01 10 00 00 Batt 15 Mem 1d 5 SELECT PROGRAM Electric Calibration gt SELECT Acoustic Calibration Diagnostic Check Fig 14 when you press SELECT the calibration display will appear 45 ELECTRIC CALIBRATION Last 2005 01 01 10 00 Calibr level 4 0dB Leq O Uasc Run calibration YES CURSOR A The screen shows date and time of the last calibration and the calibrator sound level according to the configuration of the respective parameter MENU gt gt Calibration gt gt Calibr Level Answering positively to the request to continue the selected calibration program will start Calibration procedures are carried out in automatic mode and the operator is guided by the on screen instructions The calibration result is displayed when the procedure is over and you can choose whether to con firm it or not If confirmed the new calibration will be stored In order to grant the highest measuring accuracy when the wind shield mounted select Wind Shield Correction from the CALIBRATION menu to apply a correction to the sound level meter frequency response and compensate the effects of the HD SAV shield provided with the instrument All measurement parameters with wideband frequency weightings are thus automatically adjusted In the 2010UC sound level meter besides the windshield correction the adj
98. he LEFT and RIGHT keys press SELECT to choose the integration interval When the integration interval numeric value flashes press RIGHT to set the multiple integration mode or LEFT to set the single integration mode When the integration mode is set on MULT the Tint symbol flashes Parameters can be modified only when the instrument is in STOP mode if you try to make changes to any of the parameters while the instrument is in a status other than STOP you will be asked to stop the measurement in progress pressing YES will stop recording and will allow you to go on modifying parameters pressing NO recording will continue without interruption The above settings can be made through the instrument configuration menus See a detailed descrip tion on page 32 BACK ERASE FUNCTION DATA EXCLUSION To stop a measurement in progress when recording press the PAUSE CONTINUE key All data logged until the moment key was pressed are used for calculation of integrated pa rameters However there are some cases when it is useful to clear the measurements recorded just Gs before pressing PAUSE for example because they were caused by unexpected events and not char acterizing the sound being examined During measurement press PAUSE CONTINUE integrated measurements update will be in terrupted At this point press the LEFT arrow to delete the last recorded data The integration time value will be temporarily replaced by the word ERASE fo
99. he monitor and re cording status as shown in the following example STT REC STT RECORDER Measurement SLM OFF DMP Group DUMP The table below features the list of the DMP group commands DUMP Starts memory dump Ends memory dump NEXT RECORD Requires the transmission of the next record RECORD Requires the transmission of the current record CLEAR Data download sequence 1s DMP ON r n The heading ending in the string MEMORY DUMP r n is printed if there are any data on memory DMP RECORD r n Prints the previous record in binary format DMP NEXT_RECORD rn Prints the current record in binary format If this is the last record it prints the string END OF DUMP r n DMP CLEAR r n optional Clears memory DMP OFF r n Ends data dump Data dump can be interrupted through the sequences e DMP OFF r n Ends data dump 6 CONNECTION TO A MODEM A modem connection allows a remote control of the HD2010UC sound level meter The op tional Noise Studio software module NS4 Monitor for Windows 98 ME 2000 Xp Vista operating systems can fully manage the sound level meter not only via a simple RS232 or USB serial connec tion but also via the telephone line by means of two modems While the modem that connects the PC to the telephone line must not meet any particular requirement but being Hayes compatible the modem connected to the HD2010UC sound level meter has to be configurable by the sound level meter it
100. hone and driver for extension cable This preamplifier is provided with CTC device for electrical cali bration it can be plugged into the sound level meter o using the Smt extension cable provided 10mt as an option Accessories The use of the following accessories does not significantly modify the 2010UC technical specifi cations HD SAV Windshield with spectral correction Menu gt gt Calibration gt gt Shield gt gt SAV for type 1 version Extension cable between the preamplifier and the body of the sound level meter up to a maximum of 10m SWDIO stabilized power supply HD4O0 1 portable thermal printer VTRAP tripod and HD2110 SA support for the preamplifier Outdoor shield HD WME with spectral correction Menu gt gt Calibration gt gt Shield gt gt WME for type version FA METROLOGICAL CHARACTERISTICS Frequency Weighting A C Z for RMS measurements C Z for peak level measurements Z weighting is flat along the whole sound spectrum with the following features Attenuation Frequency Range dB Hz 100 20 k 31 5 21k 16 22 5 k Frequency Response Response dB 1 Tolerance 2 Sound level meter response as 3 Microphone response 4 Tolerance 5 Effect of the case dotted line 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 20000 Frequency Hz The selection of the UC52 microphones on
101. ibration every 2 years at least includes the measurements of the acoustic response in pressure of the mi crophone preamplifier instrument chain stored on the sound level meter non volatile memory to gether with the microphone acoustic sensitivity Right after the measurement of the acoustic re sponse in pressure also the Capacity Transducer Calibration sound level meter electrical calibra tion including the microphone is carried out to be used as a reference for the calibrations made by the user Every time a periodic calibration of the sound level meter is carried out at the factory calibra tion constants are stored as a reference for following comparisons The factory calibration can be loaded onto the instrument to make a comparison or to correct a wrong calibration This procedure will also load the instrument default parameters so that is there are any data stored on memory these will be deleted Follow this procedure to proceed with this operation Download any data stored on memory Ensure that logging is on STOP mode Remove the external power supply 1f connected Remove one of the batteries the instrument will obviously switch off this operation assures that all the sound level meter internal circuits are discharged Press and hold down the ENTER key while inserting the missing battery The instrument will automatically turn on and will show a warning message indicating that fac tory parameters have been
102. ifier HD2010PNE2W with 5mt cable up to 10m on request HD2010UC kit2IE type 2 integrating sound level meter with standard preamplifier outdoor weather protected preamplifier and microphone Suitable for outdoor and indoor measurements z RA Compared to the version HD2010UC Kit2 also includes e Heated preamplifier HD2010PN2W with Smt extension cable up to 10m on request e Microphonic outdoor protection HD WME e Calibration certificate according to IEC 60651 and IEC 60804 of the measurement chain including sound level meter preamplifier HD2010PNE2 and microphone Options accessories and software HD2010 00 Memory module 4 MB memory expansion It requires the HD2010 02 Advanced Data Logger option HD2010 02 Advanced Data Logger sound level profiles automatic recording full statistic analysis capture and analysis of sound events with trigger function simultaneous data log ging of profiles reports and events Navigator program for reviewing stored data HD2020 type 1 acoustic calibrator according to IEC60942 2003 with LCD display Frequency 1000Hz sound level 94dB 114dB HD9101 calibrator type 1 according to IEC60942 1998 Frequency 1000Hz sound level 94dB 114dB HD9102 calibrator type 2 according to IEC60942 1998 Frequency 1000Hz sound level 94dB 114dB CPA 10 10m extension cable for HD2010PNE2 preamplifier SWDI10 stabilized power supply with Vin 100 240Vac Vout 12Vdc
103. ignalling the warm up period necessary every time the instrument 1s switched on The HD2010UC sound level meter stores all calibration typical parameters with respective date and time in a reserved area The calibration types can be e Acoustic calibration by means of a 1kHz sound level generator like HD 9101 e Electric calibration Capacitive Transducer Calibration with the possibility to measure the fre quency response of the whole measurement chain microphone included using the built in sig nal generator Calibration is necessary every time that the calibrator level measured by the sound level meter de viates from the nominal value for more than 0 5dB The acoustic calibration includes the capacitive transducer one and before carrying it out it 1s suggested to ensure that the environment where you are operating is suitable no sudden sounds no vibrations on the surface where the instrument is placed instrument thermal stability The electric calibration allows a quick inspection of the electric parameters of microphone and instru ment The calibration procedure includes the inspection of the microphone polarization Calibration programs are in the PROGRAMS menu accessible through the PROG key gt Tint 0s 01 08 05 amp 2004 01 01 10 00 00 30 M io Batt 95 Mem 92 57 Le 56 9 apa SELECT PROGRAM cr m gt Memory Navigator Leg OL O dBc Electric Calibration Acoustic Calibration Lpk 19 3 dBC Dia
104. ignals we can include talking or impulsive signals such as a balloon burst The calculation of integrated mean values over a given time interval might be used in spectral analysis of deterministic stationary signals according to the signal main frequency If the average time 1s at least 3 times higher than the acoustic signal main period level oscillations are considered negligible To get stable and repeatable levels the integration time can be adjusted In this case consider that the uncertainty in determining sound levels will depend not only on the integration time but also on the bandwidth of the filter being examined In the case of the white noise the following formula provides the uncertainty due to the statistical error 4 34 VB Tin Some acoustic signals can be analyzed in statistical terms The statistical analysis provides in formation complementary to that provided by the calculation of the equivalent level for signals strongly time dependent Actually signals with completely different time evolutions and conse quently with an impact completely different on the auditory apparatus can have the same equiva lent level For example in the analysis of the noise made by car traffic it is convenient to measure the so called statistical levels or percentile levels providing a description of noises fluctuating in time The statistical levels provide the sound level exceeded by a certain percentage of the measur ing
105. in the range 94dB 124dB Electrical calibration with built in generator Diagnostic check program Interface and processing programs using a PC NoiseStudio basic version for download and graphic display of stored data as well as for instrument configuration Noise Studio includes a number of optional modules for analysis and post processing of noise measurements captured using the Delta Ohm sound level meters The functions in these mod ules are specifically developed for given applications such as noise analysis in the workplace or railway traffic noise analysis and can be enabled on a licence protected hardware key CH20 Workers Protection module cod NS1 module is used to get and process the sound meas urements performed in workplaces Data are transferred from the sound level meter memory to the PC using the Noise Studio program Here they can be processed in compliance with the Italian and European Community rules concerning noise in workplaces Acoustic Pollution module cod NS2A module for acoustic climate analysis on a daily weekly and annual basis including road railway and airport noise The software performs sta tistical and spectral analysis and automatically indentifies noisy events The analyses are per formed in compliance with the national D L 194 2005 and D M 16 03 1998 and EU legis lation regarding the acoustic pollution and the mapping of the territory NS2A analysi
106. ing memory space uselessly we recommend to enable only the needed items and set the others to OFF The integration interval recording time of the reports 1s programmable using the relative menu item Menu gt gt Instrument gt gt Measurement gt gt Report Time e Par l Par 5 define five integrated parameters with relevant frequency weightings e Parameters enables recording of the 5 parameters Par 1 Par 5 defined previously e Statistics activates the recording of the statistics EVENT In this menu it requires the Advanced Data Logger option the recording of the event re ports is defined as described in the paragraph THE RECORD FUNCTION Each item can be enabled separately as with the measurement recording In order to avoid occu pying memory space uselessly we recommend to enable only the needed items and set the others to OFF e Par 1 Par 5 define five integrated event parameters with relevant frequency weightings e Parameters enables recording of the 5 parameters Par 1 Par 5 defined previously e Statistics activates the recording of the event statistics CALIBRATION e Calibration Level Sound level of the reference sound source used for the sound level meter calibration Allowed values vary from 90 0dB to 130 0dB with a 0 1dB resolution e Microphone Response allows selecting the type of frequency response of the microphone according to the sound field The standard setting for the standard mi
107. is not constant throughout the whole range of audio frequencies but it shows a consistent loss at very low or high frequencies Sensitivity is at its maximum in the range between kHz 5 kHz The variation of auditory sensitivity according to sound frequency also depends on the sound intensity Isophone curves equal loudness level contours defined in ISO 226 2003 standard are shown in the following graph and provide the sound pressure level giving the same audibility loudness at different frequencies The dotted curve named MAF Minimum Audible Field indicates the minimum audible threshold Music voice and noises in general are usually distributed throughout a wide interval of fre quencies Borderline cases are the pure tone a sound made up by a variation of pressure at a given frequency and the white noise a sound uniformly distributed throughout all frequencies it sounds like the TV audio rustling when it is not tuned in any station 102 LOR o UL YY Hi o o BEANE at a He da o o o a a w o o neue ho o x A e o na o ah o 1000 Freq Hz Noises characterized by the presence of a pure tone are more bothering at the same level with respect to noises distributed over a wide interval of frequencie
108. larization and sensitivity type of preamplifier see details on page 54 e Memory dump on MC this program allows to copy measurement data from internal sound level meter flash memory to external Secure Digital memory card please see chapter on MC on page 71 The selected program is performed upon pressing the SELECT key some programs can be aborted at any time by pressing RIGHT on the keypad When you access the programs the available mem ory will be displayed as well as battery level date and time 94 PAUSE CONTINUE key The PAUSE key interrupts the calculation of integrated measurements Leq SEL maximum or minimum levels spectra etc as well as recording The instantaneous levels are still measured and displayed in the SLM screen Press PAUSE CONTINUE to start measuring again The integrated parameters are cleared if you press RUN STOP RESET while in PAUSE during a measurement session The last seconds of integration can be excluded from the calculation of integrated parame ters shown on the SLM screen for example to eliminate the effect of an undesired noise using the LEFT and RIGHT keys while in PAUSE The maximum erasing interval is programmable from 5 seconds to 60 seconds via MENU gt gt Instrument gt gt Measurement If you press the RUN STOP RESET key while in pause during the replay of a recording with the Advanced Data Logger option the next stored data will be displayed If you press the RUN
109. lay Advanced Data Logger option Graph of distribution probability of the levels Graph of the percentile levels from L to Log DISPLAY Graphic display 128x64 pixels backlit on a 56x38mm surface Mode SLM sound level meter screen with 3 selectable parameters Time profile of the A weighted sound pressure level with FAST time constant according to 1 8s intervals with Advanced Data Logger option Level distribution of probabilities in 0 5dB 1dB or 2dB classes with Advanced Data Log ger option Percentile levels graph from L1 to L99 with Advanced Data Logger option 79 STORAGE OF MEASUREMENTS The basic version is fitted with a permanent 4 MB memory corresponding to over 500 single measurements If Advanced Data Logger option is installed the memory capacity can be dou bled to 8 MB memory module option In this case it s possible to store Continuous recording mode almost 24 hours of recording 3 parameters twice per second plus parameter 8 times per second Auto Store mode over 80 days of recording 3 parameters on minute intervals Report mode over 5 days of recording on minute interval of 5 user selectable pa rameters and complete statistical analysis Security of stored data Unlimited independent of battery charge PROGRAMS Calibrations and Diagnostic Programs Acoustic calibration at 1kHz using a sound level calibrator included
110. le selectable parameters maximum and minimum levels peak level equiva lent level and SEL e Full statistical analysis These parameters are not displayed but can be stored completely or partially at the end of each level The menu Recording gt gt Event allows selection of the 5 parameters and memorization The event parameters integration begins 2 seconds before triggering This pre trigger time cannot be modified A special printing function synchronized with the trigger is available for communication of the event itself via RS232 Menu gt gt Trigger gt gt Print If the trigger 1s enabled the sound level profile is displayed with black background when the trigger is not active so as to highlight the event s portion Displayed Parameter Acquisition time Trigger enabled gt T Leq 00 00 10 0 A Tngger enabled Maximum Level l Trigger disabled Scale Factor Analogue Bar Minimum Level Trigger enabled Sampling Interval Weighting Fig 9 Description of the Event trigger display _ 25 DESCRIPTION OF THE DIFFERENT INTEGRATION MODES The 2010UC makes measurements according to two different acquisition modes either single standard for 2010UC or multiple Advanced Data Logger required The single integration begins by resetting the integrated levels e g the Leq and ends when the set integration time Tint is elapsed or when the acquisition is manually interrupted by the RUN STOP key The follo
111. llowed by the time interval in seconds to be deleted Use the LEFT and RIGHT keys to increase or decrease the erase interval Displayed integrated parameters change accordingly allowing choosing the erase time depending on the effective need When pressing PAUSE CONTINUE again measurement will start again and the integrated parameters will have been removed from the selected interval The erase maximum time divided into 5 steps is set from menu MENU gt gt Instrument gt gt Measurement gt gt Max Back Erase Settable values are 5 10 30 or 60 seconds with 1s 2s 6s or 12s steps respectively Pa TIME PROFILE MODE REQUIRES THE ADVANCED DATA LOGGER OPTION This display mode available if Advanced Data Logger is installed presents the time profile of the A weighted sound pressure level with FAST time constant Larp The integration time is equal to 1 8s and the last 100 measured samples are displayed The HD2010UC sound level meter calculates the sound level 128 times a second and displays the maximum level at intervals equal to 125ms Pressing HOLD the display update will be stopped however the instrument continues meas uring and pressing HOLD again will restart display updating The HOLD status does not affect neither Monitor continuous printing nor recording opera tions When the continuous recording is activated with the single integration mode the integration time acts like a timer for data acquisition
112. loaded Press CONTINUE to confirm and make an acoustic calibration to store calibration constants If this operation 1s not carried out or in case the acoustic calibration should give a negative result upon the next power on factory calibration data will be replaced by those stored in the last suc cessful calibration Electrical signals supplied by a generator connected to the HD2010UC preamplifier via a ca pacitive adapter replacing the microphone can be used for periodic tests The capacitive adapter specific for the model of microphone supplied with the instrument is an accessory that can be sup plied by Delta Ohm S r l Other capacitive adapters can be used provided that the device equivalent capacity 1s included between 15 pF and 33 pF During calibration procedures before performing electrical or acoustical test it s necessary to disable sound level meter spectral corrections e Menu gt gt Calibration gt gt Microphone Resp Correction gt gt FF e Menu gt gt Calibration gt gt Shield gt gt SAV The frequency response check is made using an acoustic coupler under pressure field conditions for example using a B amp K4226 multifrequency calibrator For additional information on correc tions to be applied to frequency response see specific UC52 microphone user manual Microphone capsule maintenance In order to avoid permanent deterioration of frequency response and subsequently a decay of the specifications u
113. lowed by the common architecture of PC equipped with RS232 COM port The maximum speed of data transfer is up to 115200 baud In the last few years in order to meet the needs of the new audio and video peripherals the USB standard has been used for information serial transfer Recently many PC manufacturers do not offer the COM type ports any longer which are usually replaced by the USB type ports There is a 4 wire connection two wires for information transfer other two wires for the power supply As far as the data transfer is concerned the main differences with respect to the RS232 interface RS232 are e The transfer occurs in simplex mode 1 e it s impossible to carry out simultaneously a transfer in both the directions e The data are transferred as package size e The transfer time is defined by only one of the two units the master e The transfer speed is fix at 1 5Mbit s 12Mbit s or 480Mbit s according to the USB stan dard and the kind of connected device The two devices connected through the USB interface are identified as master and slave The master supplies power to the slave and decide the sense and the transfer time scheduling The USB interface of sound level meter is a sort of slave and then it has to be connected to a USB master able to supply with the necessary power and to manage the communication On the HD2010UC standard kit it is included a serial connection cable the user can choose between code HD2110RS for PC with
114. lues When you have finished with the adjustments wait a few seconds or press ENTER to confirm and quit the selection mode UP key The UP key selects a previous line in the menus or increases the selected parameter Decreases the scale limits of the time profile and of the frequency spectra moving the graph upwards MODE key If Advanced Data Logger option is installed the MODE key selects the different display modes of the instrument from SLM to Time Profile Probability Distribution Cumulative Distribution All operating modes are active at the same time even though not displayed using the MODE key you can select the display mode without affecting measurement LEFT key ZOOM The LEFT key selects the previous character in the active line of the menu It jumps to a previous parameter during the selection of a measurement variable that needs the definition of more than one parameter see SELECT ENTER key The ENTER key confirms the selected parameter When setting parameters from the menu to quit setting without saving a parameter just press any key except SELECT ENTER and the four ar 96 rows or press MENU Factory setup is loaded into the sound level meter by turning it on while holding the ENTER key RIGHT key ZOOM The RIGHT key selects the next character in the active line of the menu It jumps to the next pa rameter during the selection of a measuring variable that needs the definition
115. mands A9 SET CRLF Provides the command list of the SET group A10 SET lt COMMAND gt CRLF Provides the current status of the specified command C3 KEY CRLF Provides the command list of the KEY group D2 STT CRLF Provides the command list of the STT group D3 STT lt COMMAND gt CRLF Provides the current status of the specified command E2 DMP CRLF Provides the command list of the DMP group 150 SET GROUP SETUP The following table shows the list of the commands of the SET group SETUP AS Acknowledge ON OFF default ON Always ON upon power varpose AF tei ONOFF E A ON a B Percentile level 1 in 1 99 default 1 Percentile level 2 in 1 99 default 10 Percentile level 3 in 1 99 default 50 Percentile level 4 in 1 99 default 90 SLM PROF DLOGGE A8 Continuous recording of SLM and PROFILE parameters R ON OFF default ON 1 REP PARAMETER REPORT parameter see parameter list 2 REP PARAMETER REPORT parameter 2 see parameter list 60 REP PARAMETERS Recording of REPORT parameters 1 5 ON OFF default OFF 5 EVN PARAMETER EVENT parameter 5 see parameter SEQ TIMER xi delay in s m 1 59 c or h 1 99 The value that some parameters can take 1s listed in the following table The default value 1s in bold print OE co e E E PAK 4 ABR BAUD_RATE RS232 MODEM cia PRINTER INPUT_GAIN ERASE TIME INT MODE REPORT_TIME o 28 Parameter
116. measured simultaneously using the FAST SLOW and IMPULSE time constant by a sur face mount machine The displayed levels are the maximum levels calculated on intervals equal to 1 8s The most variable profile is the FAST profile 8dB while the less variable 1s the SLOW one 3dB The IMPULSE profile is systematically higher than FAST and SLOW as it reflects the impulsive nature of the noise issued by the machine Impulsive sounds independently on their spectrum are more dangerous for the human ear as the energy involved in the short time lapse in which they develop does not allow the ear to take any defence Therefore the equivalent level being equal a noise source containing impulsive com ponents is generally penalized Unfortunately while the ear sensitivity decreases according to the duration of noise the risk of an auditory injury does not decrease For this reason sound level meters usually have a built in circuit for the measurement of the acoustic signal peak value LAegs L7pk LAlp dB 95 85 65 14 32 09 14 32 22 14 32 35 14 32 45 14 33 01 14 33 14 14 33 27 14 33 40 The non weighted peak level and the IMPULSE level relevant to the surface mount machine are illustrated in the figure As you can see the peak level is at least 10 dB higher than the IMPULSE level The parameter PEAK referred to as Lpx has been defined in the international standards IEC 60651 IEC 61672 It provides the peak level reach
117. ment or a calibration just wait an hour after tem perature has changed Humidity The HD2010UC sound level meter and the microphone are not affected by relative humidity up to 90 However protect the microphone from rain and snow and keep it clean In case of bad weather it is suggested to use a windshield and in case of use in very humid environments the proper microphone dehumidifier should be applied Pressure Microphone sensitivity depends on atmospheric pressure Sensitivity increases as pressure de creases and the change of sensitivity for the HD2010UC with the UC52 microphone measured at 250 Hz is always lower than 0 3 dB kPa in the range 85 kPa 108 kPa as required by IEC 61672 for Class 1 sound level meters Sensitivity drift with ambient pressure is usually worst at high fre quencies even if the sensitivity maximum difference in the range 85 kPa 108 kPa remains within 0 5 dB over the whole sound spectrum Wind To reduce wind disturbance as much as possible it is suggested to use the proper windshield con sisting of a polyurethane porous globe to be placed on the microphone This useful accessory protects also from dust dirt rain and snow The presence of a windshield slightly alters the microphone frequency response and more accurate sound level meters are pro vided with a correction curve to compensate this effect Vibrations Even though microphone and sound level meter cannot be easily affected by vibrations it
118. n the sound level distribu tion of probabilities beginning with a 100 probability for all lower classes with a value lower than the minimum measured level and for each class progressively subtracting the corresponding distribution probability of the level probabilities 100 The cumulative probability will be null for levels higher than the maximum measured level The percentile levels are calculated interpolating the cumulative distribution For example if from the analysis of the noise of a traffic road you detect that the sound level usu ally A weighted examining the auditory impact remains higher than 74dB half the time the per centile level Lso is 74dB The integrating sound level meters directly supply the time integrated parameters such as equivalent level and sound exposure level in addition to maximum and minimum On the other hand the statistical analysis is a prerogative of statistical analyzers 108 NOISE DOSE The measurement of the Dose of noise is used in the field of noise monitoring in a working environment meant as a percentage fraction of a maximum daily exposure to noise The organiza tions taking care of safety in working environments have defined some standards for the measure ment of the noise dose considering the energy content of sound pressure and comparing it with a maximum daily equivalent level over an 8 hour time interval that is in Italy equal to 85 dBA A weighted equivalent level
119. nds the manufacturer s logo and the program version Then it switches to the SLM working mode Sound Level Meter and displays 5 instantaneous or inte grated measurement parameters in numeric form Nelta m ml na LIMITI I tic II iti Sound Level Meter 79 9 303V2 7 a GBC LLO J dBA OLU O dec Firmware Before switching off the instrument press STOP to end the ongoing measurement If you do not do it a message will request you to stop the measurement in progress WARNING Stop the meas urement to continue SELECT PARAMETER WARNING Stop measurement to continue YES Press YES and then ON OFF to switch off the instrument 92 Auto Power Off Function The instrument is provided with the Auto PowerOff function that switches automatically off the in strument after 5 minutes when it is in STOP and no key is pressed in this time interval Before switching off the instrument will make a series of beep in this phase you can press a key to prevent the instrument from switching off The function can be disabled from the MENU via the Auto Power Off item MENU gt gt Instru ment gt gt System gt gt Auto Power Off OFF In this case the battery symbol flashes to remind the user that the instrument will not switch off automatically but only if the lt ON OFF gt key is pressed The Auto Power Off function is temporarily disabled when an external power supply is used or when the instrument is rec
120. ne in order to simulate the sound percep tion this means that the microphone sensitivity will have to be adjusted to simulate the frequency response of the human ear Two correction curves named A weighting and C weighting have been defined as international standard IEC 60651 recently replaced by IEC 61672 When the sound level is corrected by A weighting it is referred to as Lap and simulates the perception of low sound levels When on the contrary the sound level is corrected by C weighting it is referred to as Lcp and simulates the perception of high sound levels When there is no interest in sound perception measurements are carried out using Z weighting LIN for IEC 60651 that represents a constant response to all frequencies in the sound field SPECTRAL ANALYSIS The spectral analysis by bands is used to analyze in detail the features of a complex sound For this analysis the range of audio frequencies between 20 Hz and 20 kHz is divided into bands typically with a constant percentage bandwidth corresponding to an octave or to a third octave The sound level is calculated for each band considering only the noise components with frequencies in cluded within the band limits for octave bands the upper limit always equal the double of the lower limit while for the third octave bands the upper limit equals 1 26 times the lower limit so that an octave band is divided into three third octave bands For example the band c
121. nimum levels Peak level Equivalent level SEL The event trigger feature can be activated only in single integration mode Therefore it is not possible to enable event recording while multiple integration mode is selected When the Measurement group recording is activated together with the Report and Event groups recording the Measurement group continuous recording 1s enabled only with the events sensed by the event trigger This allows a lot of memory to be saved minimizing information losses during the events the maximum quantity of logged information occurs while with outside sound events the recording of the level is also carried out according to a reduced time resolution as defined in MENU gt gt Instrument gt gt Measurement gt gt Report time Fig 10 shows the recording flow for the Report and Event groups The Measurement group recording interval is equal to 2 recordings a second In the following example also the Report group items are memorized with a Report time amounting to 10s OO te 0 5s 10s Fig 10 When the trigger function detects an event identified by the overcoming of the trigger thresh old or when ENTER is pressed a time marker 1s recorded Similarly when the end of event conditions are sensed as identified by the deactivation threshold being reached or by the external TRGIN signal or when ENTER is pressed and after the set stop delay has elapsed another time marker 1s recorded After th
122. nnected to the serial port The connection possibilities are PRINTER connection to a printer with RS232 input RS232 connection to a PC equipped with RS232 port physical MODEM connection to a modem with RS232 input RS232 see Connection to a mo dem on page 66 USB connection to a PC by USB port see CONNECTION TO A PC WITH USB INTERFACE on page 68 MC connection to optional module HD2010MC for SD memory card recording see paragraph on page 71 MEASUREMENTS The Measurement item includes the acquisition general parameters Input Gain with Input Gain 0 the measuring range upper limit equals 140dB and as much as the input gain increases the maximum measurable level decreases correspondingly see page 74 Select the proper gain according to the level of sound to be Integration interval Once this time has been reached the instrument automatically switches to HOLD interrupting display update It can be set from a minimum of Is to a maximum of 99 hours When continuous recording is activated the integration time acts like a timer for data acquisition stopping automatically the measurement when the time is elapsed If set to Os the timer is disabled and the integration becomes continuous Report Time report parameters are integrated over intervals corresponding to the set time At the beginning of every interval report parameters are automatically cleared Report time can be set to 1 2 5 10 20 and 30 s
123. nt and the microphone These are all items that cannot be changed by the user Instrument instrument name Serial N instrument serial number Version current firmware version loaded Microphone supplied Free Filed microphone model is UC52 Mic S N microphone serial number Mic Response type of microphone response FF stands for Free Field DF for Diffused Field Class IEC61672 Class of tolerance according to IEC61672 2002 Memory memory available on the instrument The standard is 2Mbyte Options firmware options Ext range always OFF SYSTEM It allows configuring some system parameters e Time current time e Date current date expressed as year month day Display contrast allows adjusting the display contrast When the ambient temperature changes the display contrast slightly changes it can be adjusted entering a higher value to increase the contrast or a lower one to decrease it The value can be set between 3 mini mum and 9 maximum 9600 Auto Power Off the instrument is provided with the auto power off function that auto matically switches it off after 5 minutes the instrument is in STOP mode and no key has been pressed Before switching off the instrument will make a series of beep press any key to prevent the instrument shutting off The function is active if this menu item is ON If you set Auto Power Off OFF the instrument will not automatically shut off In this case the battery symbol
124. nt fields When a diffuse field microphone is used in free field it usually provides precise values when it is oriented at 70 80 compared to the sound source If 1t is pointed to the source direction it pro vides too high values mainly at high frequency Vice versa a microphone optimized for the free field will provide too low values when measuring in reverberant fields and in all cases in which it will not be oriented towards the sound source 109 Modern sound level meters like HD2010UC apply corrections that can modify microphone responses according to the acoustic field in which they are used In this way you can for example make measurements in indoor environments in presence of multiple sound sources and anyway in a reverberant field with a microphone optimized for free field by activating the correction specific for random incidence Applying this adjustment the free field microphone will give a response similar to that of a diffuse field microphone ENVIRONMENTAL INFLUENCE Temperature Sound level meters are designed to work at temperatures included in the range 10 C 50 C Most accurate sound level meters can have adjustment circuits for thermal drifts aiming to reduce at minimum the measuring error over the whole temperature range It 1s suggested however to avoid sudden variations that might cause condensation Furthermore be sure that the instrument is in thermal equilibrium before carrying out a measure
125. ntil the unit goes out of type 1 tolerances it is necessary to prevent that dust particles and dirt accumulate on the microphone membrane It is suggested to calibrate the unit every year at an accredited calibration laboratory AG Avoid to use the unit in the presence of steam containing oil conductive or corrosive substan ces Also humidity condensation on the membrane must be avoided as it modifies acoustic re sponse causes corrosion and contributes to the formation of residues difficult to remove When HD WME weather protection is connected and sound level meter turned ON power supply and preamplifier heating avoid condensation of humidity on the microphone membrane When the sound level meter is OFF heating of the preamplifier is disabled and it s therefore possi ble that condensation is formed on the microphone We advise to put the HD WME unit in a dry environment when not in use 48 ELECTRIC CALIBRATION The electric calibration using the partition of charge injected into the microphone preampli fier in charge amplifier configuration Capacitive Transducer Calibration even if it cannot completely replace the acoustic calibra tion provides however a useful means to keep under control the instrument drifts mi crophone included The figure on the right shows the diagram of the CTC technique consisting in sending an electrical signal to the preamplifier through a high stability ca pacitor so that the out
126. of measures reports or events to be chosen see chapter CONTINUOUS RECORDING OF REPORT AND EVENTS GROUPS on page 32 43 When replaying reports and events in the SLM screen reports and events parameters will be dis played respectively When events are displayed they are shown one by one including automatically a pause between the event and the next one During pause pressing the START key allows to load the data of the following event and PAUSE to restart replay The replay of measurements associated with event recording automatically enables the pauses at the beginning and end of each event trigger These pauses correspond to the time markers recorded when the trigger spots the event and at the end when saving the relevant data If the recording contains measurements reports and events the measurements are not registered continuously but only in coincidence of the sound events detected see EVENT TRIGGER FUNCTION on page 24 Disabling of measurements outside the events in combination with event and report re cording allows two different recording speeds to be maintained slow and fast associated with re ports and measurements respectively The maximum recording resolution is used only during events by enabling the Measurement group parameters recording see CONTINUOUS RECORDING OF REPORT AND EVENTS GROUPS on page 32 while for the other acquisition elements only the Report group parameters are recorded using a lower time resol
127. of more than one pa rameter see SELECT DOWN key The DOWN key selects the next line in the menus or decreases the selected parameter FS CURSOR Keypad ae It activates the cursors in a graph Press it repeatedly to activate in sequence the first cursor L1 the second one L2 or both of them in tracking AL To disable the cursors press the key again Use the LEFT and RIGHT key of the keypad to move the flashing selected cursor over the graph Relevant values are shown at the top of the display LEFT Keypad aa The LEFT key moves leftwards the cursor or the two active cursors flashing gt gt RIGHT Keypad e L y The RIGHT key moves rightwards the cursor or the two active cursors flashing _ 97 ANNEX Al HD2010UC MEASURING PARAMETERS In the next paragraphs are shown the acoustic parameters that can be displayed in numeric or graphic format with the respective abbreviations used to identify them ACOUSTIC DESCRIPTORS NUMERIC DISPLAY Instantaneous acoustic levels refreshed every 0 5s Wideband WEIGH WEIGH PARAMETER ABBREV DEFINITION FREO TEMP Legs Lxeg Short dBX Short equivalent level 0 5s X Z C A Integrated acoustic levels Wideband PARAMETER ABBREV DEFINITION SIE FREQ L e Equivalent continuous level X Z C A Xeq dBX gt gt 3 Sound pressure maximum level SPL max X Z C A ras Sound pressure minimum level SPL pin X Z C A Lpkmx l
128. ording or running a program MENU key The HD2010UC sound level meter requires according to its use many parameters to be set If you press MENU you can access all instrument parameters for the following functions Main Sound Level Meter SLM statistical analyzer Advanced Data Logger option Trigger Advanced Data Logger option Recording Advanced Data Logger option Calibration Sequencer Advanced Data Logger option Inside the menus you can Move from one item to the other within the same menu by means of the UP and DOWN ar rows Press SELECT to choose an item to be modified Use the UP and DOWN keys to modify the selected parameter Press ENTER to confirm a change or press MENU to cancel it Press MENU to exit the menu or the submenu Some of the parameters available via menu can also be set directly during the measurement phase like for example integration interval measuring range etc by use of the SELECT UP DOWN LEFT RIGHT and ENTER keys When you access the menus the available memory will be displayed as well as battery level date and time See a detailed description of the menu items on page 35 and following pages 93 x PRINT key Press PRINT to send the screen page to the RS232 serial interface in a printable format Data can be downloaded to a PC or sent to a serial printer as for example the HD40 1 see page 67 directly connected to the
129. ound level meter blocks acoustic calibrations and reports the microphone as damaged The acoustic calibration can therefore fail even if the capsule 1s replaced or repaired or if us ing a capsule with different characteristics from the one supplied If you wish to replace the microphone capsule it is necessary to use wizard implemented in Noise Studio under the menu gt gt Instrument management gt gt new microphone The procedure re quests the use of a certified acoustic calibrator it is described in detail in Noise Studio s online Help under Options gt gt New Microphone DIAGNOSTIC CHECK The diagnostic test 1s a program that verifies a series of electrical critical parameters The fol lowing are checked supply voltages microphone polarization and sensitivity and the type of pre amplifier At the end of the procedure should it fail a table will be shown with the results of the in spection If necessary refer to Troubleshooting page 90 and if needed contact our service de partment FIRMWARE UPGRADE The firmware that is the program managing all of the instrument functions can be upgraded by transferring the file from a PC to the HD2010UC through the serial USB port In this way all the instrument functions can be updated Up dating files are available at the authorized dealers To make the update you need to use firmware update function of the NoiseStudio Noise Studio must be installed on your PC
130. pe Integrating sound level meter Nome Prodotto HD2010UC Product Name Responsabile Qualit Head of Quality N DELTA OHM SRL 35030 Caselle di Selvazzano PD Italy Via Marconi 5 Tel 39 0498977150 r a Telefax 39 049635596 Cod Fisc P Iva 1T03363960281 N Mecc PD044279 R E A 306030 ISC Reg Soc 68037 1998 INTRODUCTION The HD2010UC 1s an integrating portable sound level meter performing statistical analyses The in strument has been designed combining price competitiveness and simplicity of use Attention has been paid to the possibility of updating the instrument and the HD2010UC can be integrated at any time with other options like Advanced Data Logger to extend its application scope The firmware can be upgraded directly by the user using the NoiseStudio program supplied with the instrument The HD2010UC conforms to IEC 61672 1 of 2002 IEC 60651 and IEC 60804 specifications with class 2 or class 1 tolerances The acoustic calibrator complies with IEC 60942 class 2 or class 1 specifications The HD2010UC is an integrating sound level meter and analyzer suitable for the following applica tions e Assessment of the environmental noise level e Occupational noise measurements at the workplace according to ISO9612 e Measurement at the workplace e Selection of personal protective equipment e Production quality control e Measurement of machine noise With the optional Advanced Data logger
131. proof and good quality batteries if possible alkaline If the instrument does not turn on after battery replacement Remove one of the batteries Wait at least 5 minutes for the sound level meter internal circuits to discharge Put the new battery in If the batteries are charged the instrument should turn on automatically INSTRUMENT STORAGE e Temperature 25 70 C e Humidity less than 90 R H no condensation e To be avoided High humidity storage Direct sun irradiation over the instrument High temperature source near the instrument Presence of strong vibrations Steam salt and or corrosive environments Sie The instrument case is in ABS plastics material and the protection belt in rubber do not use any solvent for cleaning 50 SERIAL INTERFACE The instrument is provided with a versatile serial interface with double protocol RS232C and USB The interface settings depend on the item MENU gt gt General gt gt Input Output gt gt Serial Disp PRINTER connection with RS232 interface of the portable serial printer MODEM connection with RS232 interface to a modem RS232 connection with RS232 interface to a PC equipped with COM type physical port USB connection with USB interface to a PC where the VCOM driver is installed The RS232 setting allows to connect the sound level meter to a COM type physical port of a PC This connection does not need any particular program to work as it is al
132. put signal does not de pend only on amplification but also on the microphone capacity Many of the micro Neu Giai phone malfunctions reflect in a capacity drift ol Signal Source i Charge amplifier identifiable by means of this calibration tech nique The electric calibration uses as a refer C 6 ence the result of the last acoustic calibration Cee and according to it corrects any possible drift of the instrument The electric calibration adjusts the acoustic response of the microphone sound level meter chain both for wideband channels and for those with a constant percentage bandwidth In case of continuous instrument drifts it is suggested to carry out an acoustic calibration to verify that there are no other problems both in instrument and microphone Transducer Operating Procedure Switch on the sound level meter if it is the case press STOP to finish the measurement in progress and make the following procedure 1 Press PROG and use the DOWN arrow to select Electric Calibration 2 Press SELECT to start the function 3 The inner signal generator will be turned on and the measured output signal will be com pared with the one detected in the last acoustic calibration The value that appears on the display 51 3 dBC in the example below before starting cali bration is the valued measured by the microphone upon pressure of the PROG key and is not relate to the calibration in progress ELECTRIC CALIBRATION
133. r HD2010PNE2W with 5mt cable up to 10m on request HD2010UC Kit1IE type 1 integrating sound level meter with standard preamplifier outdoor weather protected preamplifier and microphone Suitable for outdoor and indoor measurements Compared to the version HD2010UC Kit1 also includes e Heated preamplifier HD2010PN2W with 5mt extension cable up to 10m on request e Microphonic outdoor protection HD WME e Calibration certificate according to IEC 60651 and IEC 60804 of the measurement chain including sound level meter preamplifier HD2010PNE2 and microphone HD2010UC kit 2 type 2 integrating sound level meter kit with 4MB memory The kit includes the HD2010UC class 2 integrating sound level meter HD2010PNE2 pream plifier UCS2 free field microphone microphone extension cable CPA 5 RS232 null modem serial cable for connection of COM ports HD2110 RS or USB HD2110 USB HD SAV windshield NoiseStudio PC software basic version plastic carrying case instruction man ual The kit includes Calibration certification according to IEC 60651 and IEC 60804 of the measurement chain including sound level meter preamplifier HD2010PNE2 and microphone HD2010UC kit2E type 2 integrating sound level meter with outdoor weather protected preampli fier and microphone Suitable for outdoor measurements Preamplifier windscreen and extension cable of HD2010UC K1t2 are replaced by e Microphonic outdoor protection HD WME e Heated preampl
134. rameter from 20dB minimum to 200dB maximum with 1dB steps The shown level defines the overload threshold when the input gain corresponds to 0dB Input Gain The overload threshold automatically scales with the input gain o Integration mode Two integration modes are avallable the former 1s single SING and the latter 1s multiple MULT For the description of the two modes see chapter DESCRIPTION OF THE DIFFERENT INTEGRATION MODES The multiple integra tion mode requires an Integration interval different from zero be set and disables Report Time and Event Trigger o Lev 1 2 3 and 4 Percentile in the statistical analysis of sound events Ly percentile lev els are defined as the levels of noise exceeded for N time percentage throughout the whole measurement interval For example L represents the sound level exceeded by 1 of the measurement time These items define 4 percentile levels selectable between 1 and 99 with 1 steps The corresponding variables are shown in the SLM view as L1 L2 L3 and L4 combined with the respective percentage SOUND LEVEL METER The Sound Level Meter menu features all parameters relevant to the SLM display mode These items can be changed directly from the respective display as described in Selecting Parameters on pagel6 The first three items of the menu from Par 1 to Par 3 define the three measuring parameters and the respective frequency weightings relative to the SLM display mode Pres
135. reaches 10 corresponding to about 30 minutes the battery symbol will start flashing A protection device prevents the instrument from making measurements with insufficient battery levels and automatically switches off the 1n strument when the battery level is at the minimum The battery level expressed in percentage is visible in the menu main screen page and in the program page press MENU and PROG to access them To jump back to the measurement screen press MENU and PROG again Pressing SELECT you will select in sequence the parameters relevant to the displayed page While the selected parameter flashes you can change it with the UP and DOWN keys Press ENTER to quit the selection mode automatic exit after 10s In graphic display mode use the UP DOWN LEFT and RIGHT keys to change the vertical scale parameters The LEFT and RIGHT keys reduce and expand the vertical scale while the UP and DOWN keys decrease and increase the levels of the vertical scale the graph is so shifted up wards or downwards respectively Wa SLM SOUND LEVEL METER This is the display mode upon power on Three parameters selectable among the following ones can be displayed simultaneously e Instantaneous acoustic parameters such as Lp Leg Short and Lpx The instantaneous pressure level is displayed as the maximum level reached every 0 5s Integrated acoustic parameters with wideband frequency weightings such as Lpmax Leq Lieq and Lpkmax upda
136. ressing REC for at least 2 seconds when the instrument 1s in RUN or STOP mode If the instrument is in STOP mode and the Advanced Data Logger option is installed you will be prompted to choose between automatic AUTO and manual MAN storage the current screen will be stored 1f choosing the latter The Continuous Recording allows recording the time profile of instantaneous and integrated levels This means that you can record for example the sound pressure level with FAST time con stant 8 times a second and at the same time the sound pressure levels with SLOW time constant the peak level and the Leq over 0 5s twice a second The Auto Store recording mode combined with the multiple integration mode allows instead to store sound levels at prefixed intervals resetting them automatically at the beginning of each in terval Thus you can record for example the Leq the SEL the maximum sound pressure level with SLOW time constant at intervals programmable between Is and 99 hours MEASUREMENT OF NOISE DOSE The Dose represents the percentage of a maximum value of noise exposure throughout a day Lae D Q 10 1 dt T 0 C D Q exposure percentage for an Exchange Rate equal to Q daily exposure time usually 8 hours measurement time sound pressure level when it is higher than the Threshold Level and otherwise Criterion Level for a daily exposure corresponding to 100 of the dose Exchange Rate
137. rument gt gt Measurement gt gt Integration Mode MULT the integrated levels are cleared just be fore the beginning of each measurement cycle The MONITOR function allows sending to the serial interface the integrated spectrum at intervals equal to the Tint time Recording in Auto Store mode allows to store on memory octave and third octave if this option is installed spectra together with the parameters displayed on the SLM screen at a rate corresponding to the Tint time 6 Press REC for 2 seconds at any time to store the displayed data As soon as data are saved on memory a screen will allow you to enter the recording title If single data recording 1s activated with the sound level meter in STOP mode and the Advanced Data Logger option 1s installed a screen allowing activating the Auto Store will appear first History Mode Time Profile See also the description on page 18 With the MODE key you can open the PROFILE screen requires the Advanced Data Log ger option in which the time profile of the A weighted sound pressure level with FAST time con stant 1s shown graphically The sampling interval 1s equal to 1 8s You can start the measurements by pressing the START STOP RESET key If the sound level meter 1s set to the single integration mode MENU gt gt Instrument gt gt Measure ment gt gt Integration Mode SING once the Tint time defined in the SLM page is over HOLD will be displayed display up
138. s The reason is to be found in the sound energy concentration in the ear mechanics Usually the sound level is not static but it changes with time If the variation is very rapid the ear cannot feel the real intensity In case of sound pulses we know that the ear has a reduced perception already for durations lower than 70 ms For this reason noises with an impulsive feature are usually considered at the same level more dangerous 103 A4 SOUND LEVEL METER The sound level meter is the instrument that measures the sound level Usually it 1s made up by a microphone the sound sensitive element by an amplifier by a signal processing unit and by a reading and data display unit The microphone converts the sound signal into a corresponding electrical signal The sensitiv ity of microphones for level measurements does not depend on the sound signal frequency The preference of the type of microphone is usually based on the condenser type that grants excellent features like accuracy stability and reliability The amplifier is necessary to bring the electrical signal to a measurable amplitude and to strengthen the signal to allow cable transmission The processing unit takes care of calculating all measuring parameters necessary to characterize a sound event FREQUENCY WEIGHTING If you have to assess the auditory impact of a noise source you will have to make some cor rections to the acoustic signal provided by the micropho
139. s RIGHT to change the time weighting of measuring parameters when selected When the time weighting flashes use the UP and DOWN arrows to change it The list of available parameters is shown on appendix Al HD2010UC Measuring Parameterson page 98 STATISTICAL ANALYZER The Statistical Analyzer menu needs the Advanced Data Logger option collects the specific pa rameters related to the statistical graphs display modes These items can be changed directly in their screens e Param the parameter used for selected statistical calculations Lrp Leq and Lp with A C and Z only C and Z for Lx weightings The sampling frequency is equal to 8 samples s only 2 samples s for Lpx 3S Class width statistical analysis 1s performed by 0 5dB classes Display Stat enables ON or disables OFF displaying of the distribution of probabilities and percentile levels graph TRIGGER The Trigger menu needs the Advanced Data Logger option collects the specific parameters re lated to the event trigger Source the trigger source can be chosen among profile view sound level LEV ENTER key MAN Trigger Threshold the trigger threshold on the profile view sound level LEV 1t can by programmed with 1dB steps Trigger Threshold the trigger threshold on the profile view sound level LEV 1t can by programmed with 1dB steps Bottom Threshold the deactivation threshold different than the trigger one on the profile view so
140. s re quest advanced data logger to be installed in the sound level meter Monitor module cod NS4 for the acoustic monitoring and remote control via PC or via modem Programmed acquisition event identification and synchronized audio recording For a detailed description of the currently available analysis functions contact your authorized dealer 80 Firmware To be upgraded via the serial port with NoiseStudio software OTHER CHARACTERISTICS Printing Direct printing of logged parameters printing of a single event Continuous Printing Monitor Case Dimensions Length x Width x Height 445x100x50mm equipped with preamplifier Weight 740g batteries included Materials ABS rubber Time Date and time clock and date updated in real time maximum deviation is less than 1min month 8 REFERENCE STANDARDS IEC 60651 2001 Class 1 or 2 IEC 60804 2000 Class 1 or 2 IEC 61672 1 2002 Class 1 or 2 Group X ANSI S1 4 1983 Type 1 or 2 EMC STANDARD REGULATIONS e Protection degree P64 e Safety EN61010 1 e Electromagnetic compatibility Immunity general standard EN61000 6 2 2005 Industrial environment e Electromagnetic compatibility Immunity general standard EN61000 6 3 2007 Residential environment commercial and light industry e Electrostatic discharges EN61000 4 2 level 3 e Susceptibility to EMI EN61000 4 3 level 3 e Fast electric transients EN61000 4 4 level 3
141. s the command list of the STT group STATUS ACQUISITION DISPLAY Display management MONITOR Monitor function via RS232 RECORDER Recording management N The STT ACQUISITION commands are provided in the following table HOLD Interrupts display update UPDATE Restarts display update PAUSE RUN DI Starts measurements STOP DI Ends measurements CLEAR Clears measured levels CONTINUE Restarts measuring ERASE DI Frases the last x seconds of measure ments RECORD The STT ACQUISITION command provides information on the acquisition status as shown in the following example STT ACQ STT ACQUISITION STOP BATTERY 32 MEMORY 95 4 DUMP TIME 00 00 01 LAST CALIBRATION 2003 07 31 08 37 The STT DISPLAY commands are listed in the table below Displays 5 selectable parameters in numeric format PROFILE Displays the time profile of a selectable parameter PROB DISTR Displays the level distribution of probabilities CUMUL DISTR Displays the percentile levels graph The STT DISPLAY command provides information relevant to the sound level meter actual dis play as shown in this example STT DIS STT DISPLAY Mode PROFILE The following table lists the STT MONITOR commands 64 The following table lists the STT RECORDER commands Starts the Record function Terminates the Record function AUTO Enables the Auto Store function STT MONITOR and STT RECORDER commands provide information on t
142. self and shall not interfere with improper messages during the delicate data transmis sion phase from the sound level meter to the PC Delta Ohm S r l suggests three types of modems to be used Multitech MT2834ZDX Digicom SNM49 Digicom Botticelli The connection with these modems has been tested Other modems might be used but due to the great variety available on the market we cannot provide service for the connection to mo dems other than those listed here The modem connected to the HD2010UC sound level meter must be configured before being used for data transmission The configuration is carried out automatically by the sound level meter itself according to the following steps 1 Connect the modem to the HD2010UC by means of the HD2110 CSM special cable with M12 connector Connect the modem to the telephone line and the power supply Switch on the modem Switch on the HD2010UC sound level meter Set the baud rate at 38400 baud at least via the parameter MENU gt gt Instrument gt gt In put Output gt gt RS232 Baud Rate 6 Select MODEM as serial connection through the parameter MENU gt gt Instrument gt gt In put Output gt gt Serial Device Si ee The instrument automatically gets into the modem configuration mode The successful configu ration will be confirmed by the message Modem Configured Should the configuration fail the sound level meter will automatically switch to PC mode and the me
143. sound level meter In this last case set the parameter MENU gt gt Instru ment gt gt Input Output gt gt Serial Device to PRINTER to get a printing format compatible with a portable 24 column printer Data downloading to a PC can be managed via a communication program such as 1 e Windows HyperTerminal If the key is pressed and soon released the single screen page is sent to the serial line the let ter P will be displayed If the key is hold down the continuous printing Monitor will be started and the letter M will be displayed to stop it press PRINT again or press START STOP RESET to stop logging PROG key The PROG key is used to access the menu of the instrument programs Use the UP and DOWN ar rows to select the program press SELECT to activate the selected program These are the available programs e Memory Navigator with the Advanced Data Logger option allows accessing stored data and viewing them on the instrument display It works both with single session data and with multi ple ones See details on pag 42 e Electric Calibration single frequency 1kHz with electrical signal coming from the built in si nusoidal reference generator See details on page 49 e Acoustic Calibration is used for the sound level meter tuning at 1kHz with an acoustic calibra tor See details on page 51 e Diagnostic Check this program checks several instrument parameters supply voltages micro phone po
144. sound level variation be of a certain length You can record 5 inte grated parameters per each event and the sound level distribution of probabilities being sam pled during the event The event parameters recording does not exclude logging of profiles and reports The event trigger feature can also be activated by pressing a key Thanks to Ad vanced Data Logger option the HD2010UC can acquire the noise profile of 3 acoustic de o oe scriptors in parallel with reports sequences with 5 dedicate parameters and complete statistical analysis Moreover during data logging the trigger function enables user to identify events recording 5 acoustic parameters together with statistical descriptors of each event e During recording up to 9 different markers are available in order to signal the occurrence of particular situations to be considered during the traces analysis phase e A timer programs delayed start of capture Memory module option This option doubles the memory capacity from 4MB to 8MB Advanced Data Logger option re quired HD2010UC BLOCK DIAGRAMS MICROPHONE AMPLIFIER A GAIN DRIVER _ PREAMPLIFIER ELECTRIC CALIBRATOR RECEIVER e gt LINE SELECTOR A D CONVERTER INSTRUMENT DIGITAL SIGNAL uPROCESSOR FLASH MEMORY RS232C gt Tint l0s 01 08 25 A 30 rr 110 56 5 apa 60 8 aac 19 3 DISPLAY KEYBOARD The block diagram shows the main elements of the HD
145. ssage Configuration failed will be displayed When the modem is configured 1t 1s possible to make the remote connection running NoiseStu dio gt gt Monitor program Possible under voltages on the modem do not create problems as the con figuration 1s memorized and automatically loaded on turning it on The table shows the HD2110 CSM cable connections M12 connector female 8 pole DB25 serial connector male AA Connectors Front External view CONNECTION TO A PRINTER The HD2010UC sound level meter can print the levels displayed in a format compatible with a portable 24 column printer such as the HD40 1 Printer and sound level meter must be config ured properly Sound level meter configuration 1 Set the parameter MENU gt gt Instrument gt gt In put Output gt gt RS232 Baud Rate to 38 4k 2 Set the parameter MENU gt gt Instrument gt gt In put Output gt gt Serial Device to PRINTER Printer configuration 1 The printer Baud Rate must be the same of the sound level meter 38400 baud 2 Data bits 8 3 Parity None 4 Stop bits 1 5 Handshaking Xon Xoff 6 Auto feed Enabled Connect the HD2010UC sound level meter to the printer by means of the special HD2110 RS ca ble Follow the instructions in the documentation supplied with the printer 67 CONNECTION TO A PC WITH USB INTERFACE The 2010UC sound level meter fitted with USB interface can be connected to a PC s
146. ta stored on memory will remain The in strument cannot be switched on again until the battery level remains low The battery charge level is available on the menu main screen and on the program screen ex pressed as a percentage value Press MENU or PROG to view it When the level is indicated by 0 5 minutes of autonomy are left The battery symbol changes into a plug when the instrument is connected to an external power sup ply Note the battery symbol also flashes when the auto power off is disabled AutoPowerOFF OFF To replace the battery switch the instrument off then unscrew anticlockwise the two screws of the cover of the battery space After replacing batteries 4 1 5V alkaline batteries type AA close again the cover and fasten the two screws clockwise Check date and time If this operation takes less than two minutes no clock adjustment should be needed As an alternative to alkaline batteries you can use rechargeable batteries Batteries with lower capacity usually show greater impedance causing a worsening of the electrical noise generated by the sound level meter with repercussions on the measurement dynamic Therefore zinc carbon and rechargeable NiCd batteries are not recommended 55 WARNING ABOUT THE USE OF BATTERIES Batteries should be removed when the instrument is not used for an extended time Flat batteries must be replaced immediately Avoid loss of liquid from batteries Use water
147. ted every 0 5s Percentile levels selectable between L ad Loo Sound exposure level Daily personal exposure level Dose and daily Dose with programmable Exchange Rate Criterion and Threshold Levels Overload Time in The display is updated every 0 5 seconds The data recording depends on the integration mode selected single or multi and on the activation or not of the auto store mode see the chapter DESCRIPTION OF THE DIFFERENT INTEGRATION MODES on page 26 Auto Store OFF Auto Store ON Recording twice a second of the 3 pa rameters and 8 times a second of LAF Automatic recording of SLM page at the Automatic Stop at the end of the set inte end of the set integration interval gration interval aa a O Z YN Recording twice a second of the 3 pa Automatic recording of the SLM screen at rameters and 8 times a second of LAF intervals equals to the set integration time Automatic reset of integrated levels at At the beginning of each period integrated every integration interval levels and spectra are set to zero Integration MULTIPLE DISPLAY DESCRIPTION Left at the top of the display there are the recording status symbol and the overload or under range indicator described at the beginning of this chapter In the midst there is the integration in terval and on the right the acquisition time hours minutes seconds When the integration mode is set on MULT MENU gt gt General gt gt Integr
148. the HOLD key When the continuous recording 1s activated with the Advanced Data Logger option and the Tint time goes over the acquisition is stopped automatically If you press HOLD during the measuring phase the display update will be temporarily inter rupted When HOLD is pressed again the updating will continue Even if the display is not updated the instrument will go on measuring Pressing PAUSE acquisition and calculation of the integrated parameters will be temporarily interrupted When in PAUSE the calculation of integrated parameters such as for example Leq and the maximum levels is suspended in this phase the contribution of the last seconds of acquisi tion can be deleted using the Back Erase function and the LEFT and RIGHT keys as described in the paragraph Back Erase Function on page 16 While in PAUSE all integrated parameters can be cleared pressing START STOP RESET Press PAUSE once more to start measuring again Press PRINT at any time to print the on screen data To activate the continuous printing Monitor press and hold down PRINT for at least 2 seconds A flashing M overlapping the status indicator shows that the Monitor function is active The Monitor function remains active even jumping to other measuring views and can be disabled pressing PRINT again or START STOP RESET to stop measurement If on the contrary the sound level meter is set with the multiple integration mode MENU gt gt Inst
149. ulative distribution is equal to 100 for the classes with levels under the measured minimum and 0 for the classes with levels over the meas ured maximum From the minimum measured level class the cumulative distribution decreases for the relevant probability of each class until the class corresponding to the maximum measured level where it becomes zero The L Loy percentile levels are calculated interpolating the cumulative distribution of probabilities The vertical axis shows the sound levels in decibels and the percentile index is on the horizon tal axis The display shows the sampling interval in the left lower corner and the chosen measure ment parameter for the statistical analysis in the first line left of the status indicator and the possible overload indicator The amplitude of the vertical scale corresponds to 5 divisions The amplitude of each division is called scale factor of the graph and appears in the middle of the vertical axis This parameter 1s selectable in real time among 20dB 10dB or 5dB by division The scale factor can be set using the RIGHT zoom and LEFT zoom keys Use the UP and DOWN arrows to set the graph full scale with steps equal to the selected scale fac tor In this way the graph can be shifted UP or DOWN according to the pressed key An analogue bar indicator on the display right side provides the non weighted instantaneous level of the input sound pressure level as for the SLM mode
150. und level LEV 1t can by programmed with 1dB steps Trigger Polarity 1t 1s possible to choose increasing POS or decreasing NEG levels for the trigger on the profile view sound level LEV For the increasing levels trigger the Trigger Threshold will be higher than the Bottom Threshold for the decreasing levels trigger the Trigger Threshold will be lower than the Bottom Threshold Minimum Duration a duration filter is available to eliminate false triggers It 1s activated upon detection of the event only 1f the trigger condition persists for a number of seconds at least equal to this parameter It is used only if the Source parameter is set to LEV Stop Delay when the trigger conditions are not present anymore the event ends after a num ber of second equal to this parameter has elapsed Printing printing of a warning string TAG can be enabled through the serial interface for each event RECORDING In the Recording menu Advanced Data Logger required the parameters relating to the logging of the measured data can be found It collects the settings concerning the recording of the sound levels measured in each screen the report and event parameters If no parameter is enabled for re cording all OFF the instrument warns of the impossibility to record When the Advanced Data Logger option is enabled the recording parameters are divided in three sub menus Measurement Report and Event Without this option only the Meas
151. und level meter changes into a sound level logger capable of storing 4 parameters for more than 23 hours Impulsive events can be easily identified thanks to the possibility of analysing the profile of the A weighted sound level with FAST SLOW and IMPULSE constants A second recording mode allows storing 3 parameters programmed together with the average spectra at intervals programmable from 1 second up to 99 hours In this recording mode you can store 3 parameters according to intervals of 1 minute for over 80 days using the supplied memory 4 MB expandable to 8 MB The sound level meter automatically resets all integrated levels at the be ginning of each acquisition interval Recordings can later be searched in the memory and viewed on the graphic display using the replay function which reproduces the time trend of the sound trace The HD2010UC sound level meter with the Advanced Data Logger option has more sound level analyzer functions e Statistical analysis is available graphically in the form of the sound level distribution of prob abilities and the percentile levels graph e Parallel to the normal sound level profiles recording mode you can select a report recording programmable according to intervals from Is to 1 hour with 5 integrated parameters and the sound level distribution of probabilities e Itis possible to enable a trigger feature to capture sound events and false events can be fil tered by requiring that the
152. ure corresponding to 100 of the dose Exchange Rate parameter independent of the exchange rate and equal to e 10 for Q 3 dB e S log2 forQ 5dB e 4 log2 forQ 4dB O O COTE Roig 123 TABLE OF CONTENTS CONNECTOR FUNG TION wsss aaa 4 INTRODUCCION a 6 DOLO UCB Di aE OE EAS AS iii 9 LE MTRO PIONERO AN AAA 10 Te Outdoor Microphone UATT DO WME oori i A AE AA AD an ASA EA 10 MALORE III AIAR SITI RO 11 lino 12 DESCRIPTION OF DISPLAY MODES corneana se istanie esa dile 13 SEM ASOUNDLEVEE METER Siad a Heh at ate pec rere a Hh oa aaa lele ile 15 D Pl DESTO ara E E T a is cel 15 Sere cine Palocco 16 Back T rasek UNCON data ETUS ON lt A AA AE A AS A A A A 16 TIME PROFILE MODE REQUIRES THE ADVANCED DATA LOGGER OPTION iii 18 DISDIOY Description aaa 18 Usino NCUrsore A AAA lalla 19 Ae EIS TNC AE MOIR AES ars tread cadena plain E aaa iaia ale e li 20 ESVCLGISHIDUIION OF Probab ES AAA AAA AA AAA aaa 21 IT GE o ah 22 EXENT ERIGGBREBUNGIION liano 24 DESCRIPTION OF THE DIFFERENT INTEGRATION MODES eossmmcnimmmmsssss 26 SNOEPEN CORA TON orarie e a E E E a e E 27 MULTIPLE INTEGRATION REQUIRES THE ADVANCED DATA LOGGER OPTION iii 28 PRINTAND MONITORFUNGLIONS sla LN Lalli 29 THE RECORD EUNGIION s clelia 30 MANUAL AND AUTOMATIC SINGLE RECORDING ii 30 CONTINUOUS RECORDING il aa tees 31 CONTINUOUS RECORDING OF REPORT AND EVENTS GROUPS 32 DESC
153. urement sub menu can be accessed For details please see chapters THE RECORD FUNCTION on page 30 and CONTINUOUS RECORDING OF REPORT AND EVENTS GROUPS on page 32 MEASUREMENTS In this menu continuous recording is defined requires the Advanced Data Logger option as described in THE RECORD FUNCTION on page 30 Auto Store activates the auto recording mode of SLM screens as described in THE RECORD FUNCTION on page 30 By enabling this feature report time and event trigger are disabled SLM PROFILE activates the continuous recording of parameters of the SLM screen and PROFILE 30 If the Auto Store function is activated SLM screens will be automatically stored when the set in tegration time is over When this function is activated with the multiple integration mode re cording is performed automatically according to the set integration time Integration time 1s pro grammable from SLM display or using the relative menu item Menu gt gt Instrument gt gt Meas urement gt gt Integration interval The enabling of the recording mode is indicated by a flashing REC over the status indicator Recording is started by pressing RUN To disable the Auto Store function press the REC key briefly REPORT In this menu the recording of the reports is defined it requires the Advanced Data Logger option Each item can be enabled separately as with the measurement recording In order to avoid occupy
154. ustment for the acoustic field can be activated too With the standard microphone UC52 which has a frequency response optimized for the Free Field no correction is applied when the correction is set on Free Field When you set the correc tion on Random Incidence RI the correction for random incidence sound will be activated This setting 1s necessary to perform measurements according to ANSI standards see the parameter of the menu CALIBRATION gt gt Microphone Response The HD2010UC sound level meter is suitable for measurements on site in a temperature range between 10 C to 50 C in a static pressure range between 65 kPa and 108 kPa and in a relative humidity range between 25 and 90 The microphone itself has defined drift coefficients of acoustic sensitivity with temperature and static pressure that imply a measurable drift of the Micro phone preamplifier instrument chain even though within the limits specified for class 1 according to IEC 61672 2002 new standard 46 PERIODIC CALIBRATION The periodic calibration of the HD2010UC sound level meter is needed to ensure the traceability to the laboratory standards and is carried out in accredited laboratories for example SIT etc The HD2010UC sound level meter is calibrated at Delta Ohm Acoustic Laboratory SIT laboratory N 124 before being supplied to the user Factory calibration which is always made on new instruments and at every periodic cal
155. ution When the simultaneous recording of measurements reports and events is enabled and the event trigger uses the Profile view sound level as source Menu gt gt Trigger gt gt Source LEV the measurement recording begins as soon as the sound level exceeds the trigger threshold Menu gt gt Trigger gt gt Trigger Threshold without waiting for the minimum duration time Menu gt gt Trigger gt gt Minimum Duration The measurement recording ends as soon as the stop delay has elapsed Menu gt gt Trigger gt gt Stop Delay after the level exceeded the deactivation threshold Menu gt gt Trigger gt gt Bottom Threshold After having examined a file size press PROG to jump back to the Memory Navigator menu press LOAD to reload the current session NEXT to display the properties of the next session or EXIT to quit At the end of the list of stored files End of Dump will be displayed Press REWIND to go back to the first file of the list 44 CALIBRATION Calibration is periodically carried out to ensure the validity of measurements performed by the sound level meter and to control possible long term drifts of the measuring chain microphone preamplifier instrument To ensure that measurements performed by the sound level meter are made in conditions of stability the letter W will flash over the indicator of the instrument status throughout the whole period needed to stabilize the microphone polarization s
156. vanced Data Logger option by performing the measurements in single integra tion mode you can also record reports and events The parameters of the SLM and PROFILE screens are included in the Measurement group Together with the Measurement group recording you can also enable the Report and Event groups recording The Report and Event groups are composed of the following storable parameters 5 integrated parameters Statistics The Report group is recorded at programmable intervals using the parameter MENU gt gt In strument gt gt Measurement gt gt Report Time from a minimum of 1s to a maximum of 1 hour The 5 integrated parameters the spectra and the statistics are automatically cleared at the beginning of every report time The 5 reported parameters can include FAST SLOW and IMPULSE weighted maximum and minimum levels Peak level Equivalent level SEL Preset percentile levels L1 L2 L3 and L4 The enabling of the report time is an alternative to the multiple integration mode The report time can be set only in single integration mode The Event group is recorded per each detected event see paragraph EVENT TRIGGER FUNCTION on page 24 at the end of the event itself The 5 integrated parameters the spectra and the statistics are automatically cleared at the beginning and are integrated for the entire dura tion of the event The 5 event parameters can include FAST SLOW and IMPULSE weighted maximum and mi
157. vel 94 0dB SELECT PROGRAM gt oc I Electric Calibration ERO a CO Acoustic Calibration Insert and turn on x the calibrator Frequency Response NEXT EXIT DO 2 The first screen shows the date of the last calibration Date and in the line below the calibrator sound level to be used in the calibration in progress this value can be modified before starting the calibration program by selecting Calibration Level from the MENU see page 40 Insert the microphone in the calibrator hole and switch it on 3 Select the sound level indicated on the sound level meter display 94dB is the nominal value then press NEXT to continue 4 Now the instrument measures the sound level applied and waits for it to become steady the measured level will be displayed The indication Waiting for level stabilization will be viewed When the sound level has stabilized the measured value is compared to the reference one and if the difference is acceptable it is logged In this case the message Turn off the Calibrator will appear Press NEXT to continue 5 ACOUSTIC CALIBRATION Last 2003 01 01 10 00 Calibr level 94 0dB mum Leq 1 0 dBc Turn off the calibra tor tb GO NEXT 5 After the acoustic calibration the electric calibration will be automatically started This stage of the procedure generates the reference data for the following electrical calibrations ACOUSTIC CALIBRATION Last
158. vel are stored together with 2 val ues per second of the SLM screen sound levels Likewise when the Monitor function is enabled 4 values are sent to the interface every 0 5s The instrument full scale is determined by the selection of the input gain by choosing from the menu MENU gt gt In strument gt gt Input gain 18 The integration mode do not influence this screen recording functioning The sound level displayed on this screen can be used as source for the event trigger see para graph EVENT TRIGGER FUNCTION on page 24 USING THE CURSORS To activate cursors on the graph press CURSOR on the keypad If you press CURSOR re peatedly either L or Lz cursor or both AL cursors in tracking will be activated in succession the selected cursor will flash Use the LEFT and RIGHT arrows on the keypad to move the selected cursor on the graph The second line at the top of the display shows the level of the measuring parameter and the time indicated by the active cursor or the time interval and the L L level difference between the two cursors when they are both active The parameter level being lower than the minimum measurable level is indicated by a series of dashes Press CURSOR again to disable the cursors 19 STATISTICAL GRAPHS The functioning mode with advanced statistical analyser available with Advanced Data logger installed allows analyses on the sound pressure level with FAS
159. verage of squared values Sound pressure effective value is expressed in Pa and takes importance in sound measurement since the value is directly connected to the quantity of energy contained in the sound signal Crest Factor is the ratio between the maximum and the effective value of a quantity measured in a given time interval with reference to the arithmetic average value Sound Pressure Level is defined by the expression Pims L 20 log 0 where Dims pressure effective value Po reference sound pressure L sound pressure level also referred to as SPL is expressed in dB 120 Sound Pressure Level with Frequency Weighting The sound pressure level can be weighted in frequency applying a filter that changes 1n a predetermined way the signal spectral structure Acous tic standard filters are referred to as A and C Sound Pressure Level with Time Weighting The sound pressure level can be exponentially weighted over the time with a given time constant It 1s defined by the expression _t lep e T 1 10 108 1 20 gg Alec Po where t time constant expressed in seconds Y symbol associated to the applied time constant fictitious variable for the integration over elapsed time up to t measurement instant p the instantaneous squared pressure p o the square of reference pressure The sound pressure level can be weighted over the time with two standard time constants FAST F and SLOW
160. when no hearing protection 1s available ISO 1999 standard considering only sound energy sets out that an increase of 3 dB in the sound level halves the exposure time to keep the dose equal Italy applies ISO 1999 definition Health corporations in other countries have adopted a different principle that takes into account the ear recovery times during pauses and allow to increase the level by 4 dB DOD or 5 dB OSHA before halving the exposure time ACOUSTIC FIELD Sensors and transducers in general are designed not to disturb the physical quantity to be measured Exactly as a thermistor would limit to the minimum the temperature disturbance caused by its presence also the microphone is designed not to alter heavily the acoustic field where it works The alteration of acoustic field becomes important at frequencies corresponding to sound pressure wavelengths comparable to the microphone dimensions diffraction phenomenon For ex ample with 10 kHz sound pressure wavelength equals about 3 4 cm comparable with the dimen sions of a typical microphone Essentially there are two types of acoustic fields the free field and the diffuse field The field is defined free when the sound level decreases by 6 dB doubling the distance from the source This condition is usually met with a good approximation at a distance from the source higher than its bigger dimension and in any case higher than the bigger wavelength of the gener ate
161. wing figure shows the Leq Short profile calculated twice per second and the inte grated Leq over a measurement time of 1 minute in single mode LAegs LAeg dB 90 80 TO 60 50 10 42 14 5 10 42 22 10 42 29 5 10 42 97 10 42 44 5 10 42 52 10 42 5595 10 43 07 In the measurement time span the Leq Short LAeqS shows three phases with high noise about 80dB and a variable 52 60dB background noise The Leq profile shows that the integration of the three high noise phases gives an equivalent level stabilizing at about 77dB at the end It is often necessary or convenient to divide the measurement time in equal duration intervals and calculate the integrated levels as Leq maximum and minimum levels etc on each interval sepa rately instead of on the entire measurement The multiple integration mode serves this purpose The multiple integration divides the measurement in equal intervals according to the set 1n tegration time Tint Each single interval begins by resetting the levels and ends when the set inte gration time is elapsed the integration levels sequence ends when manually interrupted by the RUN STOP key The following figure shows the Leq Short profile calculated twice per second and the integrated Leq over intervals of 20seconds during a measurement time of 1 minute in multiple mode The Leq Short profile is similar to that of the previous figure The Leq Short profile shows the multiple integration mode

Manual - Delta Ohm S.r.l.

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