Home

Acoustics - Vibrations

image

Contents

1. It is equipped with the CTC device for the electrical calibration and with a driver for extension cable up to 100m HD2110PW heated microphone preamplifier for the outdoor HD WME device with standard connection for microphones It is equipped with the CTC device for the electrical calibration and with a driver for extension cable up to 100m It ends with a connection cable 5 m other lengths on request MC21 Class 1 microphone for free field type WS2F according to IEC 61094 4 1995 MC22 Class 1 microphone for diffuse field type WS2D according to IEC 61094 4 1995 MC23 Class 1 microphone for free field type WS2F according to IEC 61094 4 1995 Protected membrane for outdoor use HD WME PMK microphone unit for outdoor use equipped with protection against birds windproof and rain resistant shield heated preamplifier HD2110PW 5m connection cable other lengths on request and MC23 microphone HD WME P microphone unit for outdoor use equipped with protection against birds windproof and rain resistant shield heated preamplifier HD2110PW 5m connection cable other lengths on request HD WME microphone unit for outdoor use equipped with protection against birds windproof and rain resistant shield HD SAV windproof shield for 1 2 microphone HD SAV3 windproof shield for the microphone protection HD WME for outdoor use HD WME1 protection against birds for the microphone unit HD WME for outdoor use HD WME2 rain resistant pro
2. The measures necessary to make the acoustic classification of a building are grouped in a project to simplify their storage and research You can add measures to a technical report comments graphics photos etc that may be useful to document the work An updatable database divided into walls and ceilings contains the soundinsulating characteristics of the main structures The data contained in the database can be compared graphically with the measurements The program can calculate e Average reverberation time ISO 3382 e Area of absorption and equivalent sound absorption coefficient ISO 354 e Insulation by air indexes R R and D ISO 140 3 4 and 14 and ISO 717 1 Insulation of facades and fa ade elements indexes D and RO ISO 140 5 and ISO 717 1 e Insulation of Impact noise indexes L DL L and L ISO 140 6 7 8 and 14 and ISO 717 2 NS4 Monitor module real time acquisition on a PC synchronized audio recording remote monitoring and acquisition programming The software module allows you to control the sound level meter with PC in remote location Main functions are e Real time display of acquired data in graphical and tabular form e Possibility to connect via modem with the sound level meter e Acquisition of the sound level meter data directly into the mass memory of the PC monitor function e Calibration and diagnostic functions management e Acquisition programming and automa
3. Hz to 22 kHz Internal equal to 8 MB 1 profiles for 72 hours or over 46 days by recoding 5 parameters spectra per minute External via the HD2110MC memory card interface by using SD cards up to 2 GB v RS232 and USB serial interfaces v AC output LINE v External trigger for identification of events v DC output Noise Studio supplied with the instrument PC interface for data download set up and instrument management Licensed software modules to be enabled by hardware key v Worker protection module Analysis of noise in workplaces v Acoustic pollution module climate analysis acoustic noise caused by traffic and transport infrastructure such as railways and airports v Acoustic Insulation module Calculations of acoustic and architectural evaluation of passive acoustic requirements of buildings It requires the option Reverberation time v Monitor module to capture real time mass memory in the PC remotely via a modem connected to the sound level meter The program allows you to program measures and calibrations with timer and record audio with programmable trigger event v Environmental Noise Analysis of noise and environmental noise sources with automatic identification of tonal and impulsive sources Working temperature 10 50 C 25 90 RH not condensing 65 108kPa Protection degree IP64 v 4 alkaline type AA or rechargeable NiMH batteries or external 9 12Vdc 300mA v 4 alkaline type
4. analysis FFT with variable resolution from 1 5Hz to 100Hz and capture of the Leq profile at intervals of 1 32s opt HD2110 06 v Statistical analysis with calculation of the probability distribution in classes from 1 5dB and of all the percentiles from L to Log v Estimate of the audibility of spectral components through comparison with equal loudness curves in real time v Simultaneous storage of multi parameter profiles reports and records at programmable intervals associated with sound events identified Automatically or manually v Measure of the reverberation time by using the method of the interrupted source and with the method of the integration of the response to impulse opt HD2110 04 Applications v Noise monitoring with sound event capture and analysis function v Identification of tonal components even at the standard third octave band v Estimate of the audibility of spectral components through comparison with equal loudness curves in real time v Measurement in workplaces and selection of the individual protection devices methods SNR HML and OBM v Sound insulation and reclamation v Production quality control and measurement of machine noise v Architectural acoustic and building measures Inputs and outputs v Unweighted LINE Input Output jack 3 5mm v Output DC LAFp 1 8s v TRIGGER Input Output jack 3 5mm v RS232C standard serial port in compliance with EIA TIA574 Baud Rate from 300 to 115200
5. bauds v USB 1 1 serial port v 9 12Vdc external power supply unit jack 5 5mm Software for 98 XP Vista 7 Windows operating systems CH20 Hardware key for PC working with Windows operating systems When inserted into a USB port it enables the PC to use software modules of the Noise Studio programme Acoustics Vibrations Noise Studio Software for Windows 98 XP Vista 7 versions supplied with graphical display of stored data are available This programme supports some sound analysis application forms which can be enabled by licence with the hardware key The programme contains demo versions of the modules This Noise Studio programme allows connecting the HD2110L to a PC ina very easy and intuitive way Its main functions are Transfer of data from the sound level meter to PC memory Display in a graphical or tabular form of the data acquired Export to Excel and PDF formats Printing of charts and data tables Comparison of spectra for third octave bands with the noise Control of data acquisition from the PC Setup management of the sound level meter Firmware upgrade of the sound level meter Issuing the documentation for sound level meters is easy thanks to a convenient feature that allows other applications to copy graphs or tables displayed and the ability to create PDF files NS1 Workers Protection module Noise analysis in the work environment in accordance with ISO 961
6. calibration can be performed with an acoustic calibrator class 1 according to IEC 60942 or with the built in reference generator e The electrical calibration uses a special preamplifier which tests the sensitivity of the measuring channel including the microphone e The factory calibration kept in a protected storage area is used as a reference for the calibration by the user so to allow the control of drifting and prevent any out of calibration 7e Diagnostic 5 e The verification of the full functionality of the sound level meter can be made directly B by the customer on the field oO e Thanks to a diagnostic program most of the damages to the instrument as wellas Mo to the microphone can be easily detected The diagnostic analysis includes the S measurement of the frequency response of the entire measuring chain consisting of i a microphone preamp and sound level meter r e The periodic execution of diagnostics programs allows performing the sound level U measurements with confidence and avoiding any risk of malfunction discovered late a Measurements in place of the floor football noise insulation ISO 140 7 5 Acoustic Noise insulation measurem ents in buildings and elements of buildings z Test date Measuring place Partition characteristics e Curve of measured data Oure of reference values Portable Instruments requenc 80 400 500 5000 1600 Frequency Hz Ve
7. sound events and record their analysis with 5 dedicated parameters average spectrum and statistical analysis Dynamic e The measurements are made with a dynamic that exceeds 110dB and is bounded below only by the intrinsic noise of the instrument For example by setting the upper limit of the measures to 140dB it is possible to perform measurements at noise levels typical of a quiet office with the capacity of measuring accurately peak levels up to 143dB without indication of overloading e With high dynamic range it is possible to make long integrations without worrying about events that may lead to overload or subfield information Spectral Analysis e Simultaneously to the acquisition of six profiles spectral analysis is performed in real time both for octave and third octave bands option HD2110 01 e The spectrum of the sound signal is calculated 2 times per second and integrated in a linear up to 99 hours e It is possible to do multi spectral analysis including maximum or minimum which is linearly exponentially weighted e For a proper evaluation of audibility the spectral analysis can be weighted A or C or unweighted Z e The spectra are displayed along with a A C or Z weigtedwideband level The spectral analysis for third octave bands HD2110 01 option can be performed in addition to standard bands from 16 Hz to 20 kHz with bands shifted down by one sixth octave 14 Hz to 18 kHz for finding them tonal components hi
8. 2 The data for sound level measurements made in the work environment are Organized in a project where they can be handled according to regulatory requirements In addition to calculating the noise exposure of workers the program allows to assess the effectiveness of protective equipment by the methods SNR and OBM NS2A Noise Pollution module analysis of the noise climate and evaluation of road rail and airport noise The application module analyzes sound level profiles detected in internal and external environment for the assessment of climate noise noise industrial sites ports airports and transport infrastructure The analysis of the noise climate is done on a daily weekly and annual basis with a maximum resolution of 1 minute The noise profiles detected in the external environment are scanned for sources characterized by a sequence of disturbing events such as railways and airports The analysis is performed on a daily basis with a resolution equal to 1 8 of asecond auto search and analysis of sound events IONS Acoustics Vibrati Portable Instruments 359 fo aks Vibrat ics Acoust Je aD m Je Q A Acoustics Vibrations NS3 Sound Insulation module evaluation of passive acoustic requirements of buildings in accordance with ISO requirements It requires option HD2110 04 Reverberation Time
9. 2110 06 FFT narrow band spectral analysis FFT This option adds e Leq Profile at intervals of 1 32 s e Narrow band spectral analysis FFT from 7 Hz to 22 kHz with variable resolutionsdepending on the frequency from 1 5Hz up to 100Hz Ordering codes for instruments and accessories HD2110L K1 it includes the HD2110L sound level meter user s manual briefcase HD2110P preamplifier microphone MC21 for outdoor use 5m extension cable CPA 5 HD SAV windproof shield Noise Studio software and RS232 HD2110 RS or USB HD2110 USB serial cable for connection to a PC ACCREDIA Calibration Certificate is supplied HD2110 L K1 E version for measuring outdoors It includes HD2110L sound level meter user s manual briefcase HDWME protection microphone for outdoor use equipped with protection against birds windproof and rain resistant shield heated preamplifier HD2110PW with 5m connection cable other lengths on request and microphone MC21 for outdoor use This kit also includes the Noise Studio software and the RS232 HD2110 RS or USB HD2110 USB serial cable for connection to a PC ACCREDIA Calibration Certificate is supplied HD2110 L K1 IE version for measuring both outdoors and indoors It includes HD2110L sound level meter user s manual briefcase HDWME protection microphone for outdoor use equipped with protection against birds windproof and rain resistant shield heated preamplifier HD2110PW with 5m connection cable ot
10. A445x100x50 mm equipped with preamplifier 740 g with batteries IONS Acoustics Vibrat Portable Instruments 363
11. _ Acoustics Vibrations S HPA ch Third octave band spectrum Narrow band spectrum Statistical analysis probability Statistical analysis optional analysis FFT option distribution of sound levels percentile levels N HD 2110L Integrating Sound Level Meter Portable Analyzer the HD2110L is a precision integrating portable sound level meter with data logging functions performing both spectrum and statistical analysis The instrument has been designed in order to offer high performance analysis of acoustic phenomena Attention has been paid to the possibility of adjusting the instrument to regulatory modifications and to the necessity of meeting its users needs of today and tomorrow The HD2110L can be integrated with other options to extend its application scope at any time the firmware can be updated directly by the user by means of the Noise Studio program supplied with the instrument Technical regulations v Class 1 sound level meter according to IEC 61672 1 2002 Certificate of Compliance I E N No 37035 01C IEC 60651 and IEC 60804 v Class 1 octave and third octave filters according to IEC 61260 v Microphone in compliance with IEC 61094 4 Specifications v Real time octave and third octave band spectrum analysis from 16 Hz to 20 kHz v Real time third octave band with two filters bank from 16 Hz to 20 kHz and from 14Hz to 18kHz opt HD2110 01 v Narrow band spectral
12. dden among standard adjacent bands e While displaying the spectrum for third octave bands HD2110 01 option it is possible to activate in real time the calculation function of noise contours for a rapid and accurate analysis of audibility of the different components of the spectrum Statistical E lt lt Audio Recorder Recording status AUDIO RECORDING FILE 2006 07 25 16 16 21 16 000 2006 07 25 16 31 23 11 500 2006 07 25 16 43 17 14 500 2006 07 25 16 51 25 36 500 2006 07 25 16 56 45 28 500 16 15 16 25 16 35 16 45 16 55 Inserimento Dati Intervallo di analisi ae Apri File dh Aggiungi xl we Rimuovi E NS4 Monitor PC logging with synchronized audio recording 1 i Statistical Analysis As a Statistical analyzer the HD2110L samples the sound level 8 times per second and analyzes it in 0 5dB classes It is possible to choose whether sampling LFp Leq or Lpk with A C or Z weightings only C and Z per Lpk e Calculation and graphical display of the probability distribution and the percentile levels L ad Logo Acoustics Vibrations Analogical Input Output e For further analysis the unweighted LINE output allows to record the samples on a tape or directly on a PC with a capture card e It is also possible to analyze the audio track recorded with other instruments by using the LINE input e Output DC LAFp 1 8s Calibration e The
13. her lengths on request HD2110P preamplifier CPA 5 5m extention cable HD SAV windproof and microphone MC23 for outdooruse and protective membrane This kit also includes the Noise Studiosoftware and the RS232 HD2110 RS or USB HD2110 USB serial cablefor connection to a PC ACCREDIA Calibration Certificate is supplied HD2110 01 option Third Octave spectral analysis for third octave bands with double filter bench from 16Hz to 20kHz and from 14Hz to 18 kHz Calibration Certificate included HD2110 04 option Reverberation Time the measurement of reverberation time is interrupted by the sound source with a pulsed source method according to ISO 3382 HD2110 06 option FFT narrow band spectral analysis FFT from 7 Hz to 22 kHz with resolution from 1 5Hz to 100Hz HD2020 sound level calibrator from 1000Hz 94dB 114dB class 1 according to IEC60942 2003 ACCREDIA Calibration Certificate is supplied HD2010MC SD memory card interface This device includes a 1GB SD card It allows SD memory cards to interface to the sound level meter It can be connected to the sound level meter through the serial interface which also provides the necessary power In addition to the large storage capacity the fast interface allows the download of data stored in the internal memory of the sound level meter It is possible to connect a maximum capacity of 2GB HD2110P microphone preamplifier with standard connection for 2 microphones
14. ight Lden_ 2006 12 13 12 52 36 39 9 106 5 90 6 95 7 Leq TR 832dB O0dB O0dB 80 2dB 2006 12 13 13 35 47 32 5 1203 105 2 11 7 2006 12 13 15 03 23 43 5 125 2 108 9 1120 Eventi 2006 12 13 15 58 21 45 0 120 9 104 4 111 8 0 2006 12 13 17 07 01 45 3 124 6 108 1 111 6 i 0 2006 12 13 17 46 29 41 6 121 8 105 7 112 0 Mascherati 0 0 2006 12 13 18 22 33 44 5 106 6 30 1 95 4 Invalidati 0 0 0 0 0 0 0 0 0 one 410 02 A EE oA q NS2A Acoustic Pollution 24 hour analysis with automatic search of the transit of trains e The powerful DSP calculates the sound level meter 32 spectra per second simultaneously for octave and third octave in conjunction HD2110 01 option allowing measurements of the reverberation time from 0 375s in accordance with ISO 3382 Application Noise Pollution e You can monitor the sound level noise mapping and assessments of the noise climate with capture and analysis of sound events e In the assessment of noise near airports rail or road noise the sound level meter can be used as a recorder of sound events to more parameters combining the characteristics of spectrum analyzer and statistical e The identification of impulsive events is easy with the ability to analyze the profile of the layer with constant weighting and FAST SLOW and IMPULSE All parameters of measurement can be stored for further analysis e The identification of tonal components is easier and free of uncertainties by viewing a
15. ing earmuff 23 29 20 13 1 Highest efficiency Calculation Method Results LAeq Corr 81 6 4 3 Att 22 2 42 4 Protection Good Bilsom Viking Y1 CNoise blocking earmuff 26 31 23 14 Statisti Bilsom Viking V3 Noise blocking earmuff 30 34 28 20 oe ol Bilsom Clarity C1 Sound Managment earmuff 25 24 22 20 2 Bilsom Clarity c3 Sound Managment earmufi 33 31 32 29 NS1 Worker protection analysis of PPE efficacy Reverberation time e The sound level meter HD2110L with the Reverberation Time option HD2110 04 can measure the reverberation time by using the method of the stopped source and the method of the integrated impulse response according to ISO 3382 ANALISI TRAFFICO FERROVIARIO Freq Hz LAFmax dB 120 0 20 0 r Pu aici VOOUOr OSESE 4 13 00 15 00 17 00 13 00 21 00 23 00 01 00 03 00 05 00 07 00 09 00 11 00 Inserimento Dati Intervallo di analisi Parametri trigger di evento Opzioni ae Apri File db Aggiungi 3 Interv D Lgs 08 05 Livello Attivazione dB 70 Livello Disttivazione dB 60 Fs He E i Aggiungi evento je 20 f22 Tempo Attivazione s 5 Tempo Disttivazione s 10 Eventi Statistica Tracciato Salva a Rimuovi Eventi Individuati Descrittori Ev _ Inizio Durata sec SEL dB L eg Ev dB LAF max dB Note Lday Levening Ln
16. m7 Test no Acoustic com petent technician Date Signature fol aks Vibrat ics Acoust Te aD E m Je Q a u Acoustics Vibrations Connection to a PC e USB and RS232 interfaces allow quick data transfers from the sound level meter to the mass storage of a PC In the case of extended recordings where the memory is not sufficient it is also possible to activate the Monitor function which transmits through the serial interface streaming the data displayed by recording them directly on to a PC memory e The HD2110L can be completely controlled by a PC via the multi standard serial interface by using the dedicated communication protocol e Via the RS232 interface it is possible to connect the sound level meter to a modem e Electrical calibrations and diagnostic tests can be carried out remotely by using the remote control HE Spectrum dBA E Spectrum PPE PPE Att Act Level 34 0 57 0 69 6 79 5 93 9 95 7 91 7 87 2 80 5 101 2 1 8 63 125 250 500 1k 2k 4k 8k 16k LAeqL Cor Bilsom Mach1 Noise blocking earmuff Builder Device SNR H M L Options Efficent Alfa Bilsom Mach Noise blocking earmuff 23 29 20 13 Bilsom Leightning L1Hs Noise blocking earmuff 28 31 25 19 4 ightning LF 32 32 30 24 Efficent Alfa DPI2 Bilsom Leightning L2Fs Noise blocking earmuff Bilsom Mach1 Noise block
17. nd recording the spectra of the minimum estimated with any weighted broadband Z C or A and for third octave bands both with centre frequencies from standard 16 Hz to 20 kHz and with centre frequencies that move on the intersection of the first from 14 Hz to 18 kHz HD2110 01 option e The audibility of the tonal component compared with that of the remaining portions of the spectrum can be evaluated both on the field thanks to realtime calculation of noise contours HD2110 01 option and with the Noise Studio PC software supplied with the instrument Workers protection e The sound level meter HD2110L is able to perform all the steps required on the protection of workers from the risk of exposure to noise e The selection of personal protective equipment can be made with both the octave band spectral analysis OBM method and by comparing the weighted equivalent levels and measurable A and C measured simultaneously SNR method e In case that an undesired sound event produces an overload or simply alters the result of integration the contribution can be excluded using the deletion function of unwanted data e The calculation of the equivalent time constant IMPULSE LAleq allows the assessment of impulsivity sources Technical features Standards inch Microphones Dynamic Range Linear Field Acoustic Parameters Frequency Weighting Temporal Weighting Integration Spectrum Analysis Audibility Statistical Anal
18. ntours according to ISO 266 2003 option HD2110 01 Calculation of the probability distribution and the percentile levels from L to Log v Parameter Lep Log Lok A C or Z weighted only C or Z for Lpy v Sampling frequency 8 samples second v Classification Classes from 0 5 dB Calculation of 5 freely programmable event parameters Average spectrum calculation by octave and third octave bands Calculation of statistical levels from L to Lgg Event identification trigger with programmable threshold and duration filter External and manual trigger Reverberation Tim Reverberation time measurement by using sound source interruption or impulse response integration option HD2110 04 Profile Data Logging Spectrum Data Logging Display Memory Input Output PC Programs Operating conditions Power supply Dimension and weight 1 profile with programmable sampling from 1 8s to 1 hour and 3 profiles with 2 samples second Programmable sampling from 0 5s to 1 hour MLT MAX or MIN mode Graphic display 128x64 pixel v 5 parameters in numeric format v Profile parameter to be chosen with sampling from 1 8 second to 1 hour v Octave band spectrum from 16 Hz to 16 kHz v Third octave band spectrum from 16 Hz to 20 kHz or from 14 Hz to 18 kHz option HD2110 01 v Graph of the probability distribution of the sound level classes from 0 5dB 1dB or 2dB v Graph of percentile levels from L to Log v Narrow band spectral analysis FFT from 7
19. tection for the microphone unit HD WME for outdoor use HD WME3 stainless steel support for the preamplifier of the microphone unit HD WME for outdoor use CPA 5 5m extension cable for the HD2110P preamplifier CPA 10 10m extension cable for the HD2110P preamplifier CPA 20 20m extension cable for the HD2110P preamplifier CPA 50 50m extension cable for the HD2110P preamplifier HD2110 RS serial RS232 cable for the connection to a PC or to the portable printer HD40 1 HD2110 USB serial USB cable for the connection to a PC SWD10 stabilized power supply voltage Vin 100 230Vac Vout 12Vdc 1000mA VTRAP tripod max height 1550mm HD2110 SA Support to fix the tripod to the preamplifier HD40 1 Portable serial thermal printer equipped with power supply SWD10 Features Acquisition e Possibility to acquire the timing profile of 6 simultaneous measurement parameters by freely choosing the time or frequency weightings e Possibility to store multiple parameters of the sound level with a capacity of more than 46 hours Recordings can be searched in the memory and displayed on a graph with the function Replay which reproduces the time course of the sound track e In addition to sound level profiles it is possible to capture sequences of relations at programmable intervals from 1 second to 1 hour with dedicated parameters average spectra and full statistical analysis A versatile trigger function is able to identify
20. tic monitoring e Possibility to record audio in sync with the phonometric measures by using the versatile trigger function NS5 Environmental Noise module analysis of noise and environmental noise sources resulting as disturbance to human activities The noise profiles detected in indoor or outdoor environments are analyzed with an automated search for tonal or impulsive components Options Option HD2110 01 Third Octave spectral analysis for third octave bands Spectral analysis for third octave bands in class 1 according to IEC 61260 from 16Hz to 20kHz Alternative filter bank with octave band centre frequencies shifted by half from 14Hz to 18kHz for the identification of tonal components at the intersection of standard bands Audibility of spectral components is evaluated in real time by comparing the spectrum with the noise contours calculated using ISO 226 2003 Option HD2110 04 Reverberation Time measurement of reverberation time is interrupted by the sound source with a pulsed source method according to ISO 3382 Measurement of reverberation time for octave bands from 125 Hz to 8 kHz and in combination to HD2110 01 option for third octave band from 100 Hz to 10 kHz with a sampling interval of 1 32 s Automatic calculation of reverberation times EDT T10 T20 and T30 for all bands and analysis of the decay profile with the ability to calculate the reverberationtime in an interval of your choice Option HD
21. ysis Analysis of Events Acoustics Vibrations Class 1 group X according to IEC 61672 2002 and class 1 according to IEC 60651 2001 and IEC 60804 2000 Class 0 according to IEC 61260 1995 Type 1 according to ANSI S1 4 1983 and S1 43 1997 Class 1 D order 3 Extended range according to ANSI S1 11 1986 v MC21 condenser microphone polarized 200V for free field high stability type WS2F according to IEC 61094 4 v MC23 condenser microphone with coated membrane polarized 200V for free field high stability type WS2F according to IEC 61094 4 combined with the HDWME950 weatherproof microphone unit v MC22 condenser microphone polarized 200V for diffuse field high stability type WS2D according to IEC 61094 4 23 dBA 143 dB Peak 110 dB Spr Leg en SEL Leng Linax Livin Low Dose Li Simultaneous A C Z only C and Z for Lox Simultaneous FAST SLOW IMPULSE From 1s to 99 hours with Back Erase function Parallel filters in real time in compliance with IEC61260 class 0 specifications v Octave bands from 16 Hz to 16 kHz v Double bank third octave filters with central frequencies from 16 Hz to 20 kHz and from 14 Hz to 18kHz HD2110 01 option v FFT from 7 Hz to 22 kHz with variable solutions from 1 5 Hz to 100 Hz option HD2110 06 Average spectrum AVR mode multispectral mode MLT maximum spectrum mode MAX and minimum spectrum mode MIN Real time comparison of spectrum for third octave bands with the noise co

Download Pdf Manuals

image

Related Search

Related Contents

Aerocool GT-R  Untitled  Anleitung  Valueline VLSP40020W100 coaxial cable  match it! antibody release notes  Philips 872790026032810 energy-saving lamp  iSteam® STEUERUNG  Notice - Calideal  Securepoint UTM V11 Installationsanleitung    

Copyright © All rights reserved.
Failed to retrieve file