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User Manual Ngara - Acoustic Research Labs Pty Ltd

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1. Network Connections 2 al x File Edit view Favorites Tools Advanced Help ae Q Back v Y 7 Search li Folders la x ie Address e Network Connections Go Incoming Incoming Connections No clients connected LAN or High Speed Internet Local Area Connection Connecter dd A Intel R 82562V 2 10 100 Net Wizard wa New Connection Wizard Network Setup Wizard 38 Incoming Connections Issue 2 12 Page 67 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Network Connections oj x File Edit View Favorites Tools Advanced Help ay Gp Back ED 7 a Search gt Folders 3d X ie m Address Network Connections z EJ Incoming Incoming Connections 1 chin 1 client connected D a RR ke WAN Miniport PPTP LAN or High Speed Internet Local Area Connection Connecter D Intel R 82562V 2 10 100 Net Wizard Network Setup Wizard New Connection Wizard 5 objects The modem used to connect the server to the internet must forward all incoming act
2. File Session Control Detail View Help Logger Results Engine Get Detail Info Download Session Stats Results SPL A amp 15 7 dE Remote Format SPL C 13 9 dE Gather EL XXX Statistics Leq 15 2 dB Reconsitute Wave Files Re Farmat Drive Leg C 14 0 dB Only the CSV files can be downloaded using the remote user interface as the downloading of raw audio files would create excessive network traffic Note Accessing session files can also be achieved by plugging in the USB storage device directly to a free USB port on a computer Issue 2 12 Page 54 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Session Download iol x Session Name Mumber af Files Tatal Size MB 20080408 133324 1 n 20090408 140620 Ses 1 E S Avail Sessions Download Type Detailed CSW File C Statistics Download Type The data can be downloaded in two formats 1 Adetailed CSV file This includes 100ms SPL and Leq samples for both A and C weighting and is a mirror download of what is found on the USB storage device 2 Di
3. Choose an interval of your choice no shorter than 5 minutes and a fail count Set the 1 server to www google com Click Apply Changes For example if you set the interval to 15 minutes and the fail count to 4 every 15 minutes the connection of your modem will be checked and if the configured servers fail to respond after 4 attempts 1 hour then the modem will reset itself Keep Alive x Interval minutes no shorter than 5 minutes Fail count 0 times 1st Server C900 2nd Server Issue 2 12 Page 70 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd
4. Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 Labs Pty Ltd www acousticresearch com au User Manual Ngara Real Time Sound Acquisition System Issue Number 2 12 Date 21 3 2014 ARL Reserves the right to change specifications and functionality without notice P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Issue Status Tissue aumo Bespio me Lem mI LLL Issue 2 12 Page 2 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au TABLE OF CONTENTS TABLE OF CONTENTS 1 tren tt cree Eudicun time er redeem an et ser er item at alr uie c ogpmuusunu de DE onis ua stus dete cumst ten Sere sence 3 INTRO IN oa sa se tira asc cat se jee A 6 Mh SCO 6 T2 02 6 2 Ee ee en ee ee ee ee eee eee ee eee eee eee 6 13 FAD DIICADIS Standards usu ocsd
5. Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 3 Connection to a Local Area Network LAN Modem Router Figure 14 LAN Connection Example The above figure illustrates a possible connection method between a logger and an existing LAN Special care must be taken in setting up the network settings on Ngara to ensure there are no network conflicts with other computers on the network The easiest way to achieve this if a DHCP server is running on the modem router is to set Ngara to DHCP IP mode Most routers modems support both crossover and straight through type network cables thus any may be used in this instance Refer to the documentation provided with the modem router to ensure the correct network cable is used Logger e Canuse DHCP IP Mode care must be taken whilst using Manual mode to ensure there are no conflicts with other computers on the network See Section Net Config e When using DHCP mode IP Address Netmask and Gateway are set automatically Computer e Nochanges required Linking to Ngara is then achieved by entering the IP address allocated to Ngara or by using ngara XXXXXX where XXXXXX is the Ngara serial number To access Ngara through the Wide Area Network WAN the IP address for the modem must be known and ports 3000 3001 must be forwarded by the modem to Ngara Re
6. C Remote Switch Parameters Recurrence Stark Time End Time Hourly haoo fiatoo hh mm 3 hh mm 4 OF Cancel Apply The timer module can be set up to repeat on an hourly or daily basis Ngara will trigger and record a wave file for the configured time period 5 3 3 5 Setting a Remote Push Button Trigger The following example illustrates how to set a remote push button trigger wave file recording Configuration l X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock ALES Output UCF Outputs i Triggering Enabled Type C SPLA Duration LEG 4 Duration SPL A Percentile LEG 4 Percentile SPLE Duration LEG C Duration SPL C Percentile LEG C Percentile C AMS Detection Timer Remote Switch Record Pre Trigger s 20 Record Post Trigger s ad OF Cancel Apply Ngara User Guide Ngara will trigger and record a wave file for the pre and post time periods once it detects a push button trigger event NOTE THIS REQUIRES AN INTERNAL MODIFICATION AND CANNOT BE USED AT THE AS THE 3G MODEM POWER SUPPLY Issue 2 12 SAME TIME Page 45 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hi
7. Flush Logs This menu item appears only once erroneous log files have been found within internal storage memory This menu item allows the user to flush the internal log files to an attached USB device The log files stored internally do not contain any header information found within the USB log files however they are stored using session names to enable quick identification in the same manner the USB log files are stored The internal log files will be moved to a directory named Incomplete Log Files within the USB drive the directory will be created if it does not exist Note This menu item will not appear if a session is running or no internal log files are found To flush internal log files the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display an error message if an error was encountered Note A valid drive must be inserted into Ngara s USB port 4 5 9 Exit Return to top menu structure To return to the top level menu structure the following steps must be carried out 1 Activate menu item by pressing lt ENTER gt Issue 2 12 Page 30 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Researc
8. Monday Wednesday Friday Saturday Weekly Tuesday Thursday Sunday OF Cancel Apply The above example shows how to control power to the Ethernet port by using the alarm clock function In the example the Ethernet port will be turned on between 3pm and 5pm every Monday Ngara will try to initiate a VPN connection if enabled under the advanced settings tab whenever the Ethernet port is turned on Connection attempts are made in one minute intervals to allow modem and router stabilisation Issue 2 12 Page 63 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Configuration X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock AU Output UDF Outputs Advanced Settings jw ALS Output Enabled Type C SPLA Duration LEG 4 Duration SPL A Percentile C LEG amp Percentile C SPLE Duration LEG C Duration C SPL C Percentile LEQ C Percentile C AMS Detection Timer Follow Alarm Clock Parameters OF Cancel Apply The 12V DC AUX output can be setup to follow the Ethernet port as
9. Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd TRIG TYPE Level SPLA A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Disk Record Files The disk format information file maintains a small record of valid sessions found of disk and drive speed parameters Ngara maintains a record of sessions stored within the hard drive to determine if sessions have been deleted To increase disk performance Ngara will not allow the use of a disk which has had sessions deleted Disks are to be formatted using Ngara only NOTE NGARA IS NOT COMPATIBLE WITH USB 3 0 NOT ALL USB DRIVES ARE COMPATIBLE WITH NGARA ONLY USE THE USB DRIVE SUPPLIED WITH THE UNIT 3 3 2 Accessing USB Data It is not necessary to download the data using Ngara The USB disk is formatted using a FAT32 structure and thus is Windows compatible Note USB 3 0 is not compatible Only USB 2 0 works with Ngara However if access to Ngara is not achievable data can be downloaded using the host program or via a setup FTP server 3 3 3 Maintaining Disk Access Speeds Due to the nature of a FAT32 file system disk fragmentation increases disk access speed It is therefore reco
10. Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Ngara will never specify its own IP address so ensure this option is left unchecked It is possible to set up the server so any time Ngara logs into the network it will appear with the same IP address This option is network dependant if unsure please consult with your network administrator Incoming TCP IP Properties _ xl Network access TCP IP address assignment Assign TCP IP addresses automatically using DHCP Specify TCP IP addresses Erom To Total Continue clicking Next and Finish to finalise the setup of the VPN server New Connection Wizard Completing the New Connection Wizard You have successfully completed the steps needed to create the following connection Incoming Connections The connection will be saved in the Network Connections folder To create the connection and close this wizard click Finish Once the server has been successfully setup an icon showing the server is waiting for incoming connections will appear on the Network Connections window
11. SA OE S SION sesine iiae eaaa ri u JJJ m 27 45 2 SOP SESSION RTT 27 Aa PROE anea e E EEE AE E E 28 ESA ONGS DISK ernea E E E E E E 28 Aoo WAV S e E E E E E E E E 29 oo TWEN O UD PER 29 Wo TOJE e U e E EE E ee 29 Issue 2 12 Page 3 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Tr MSS RT 30 I MI ee ee eee ee ee ee ee 30 4 6 Status Menu Item Menu 3 ssssseesseeesseeseeenn nenne nennen nnne nnnnaa nnn nnns n naar nnns sana aa 31 4 6 1 SNOW TE MLB SPENT TTE 31 ICM ES E 31 SEINE rA um EE 31 ir Eoo Pe P P cee 31 oc MM Eoo am P M 31 ZO WAIN DOCIO RET m 31 Dno nn Orta eae Oe ee eee ne ne E nce eee ee eee ee ee 31 4 DISk Monu em Ment M 32 4 7 1 DIR fe 0 r E ee eee eee eee 32 7 MEME Biko oM m mm 32 4 7 3 DISE IZE t o c ee 32 WC EE uM m 32 Aro PROPIA D Kere 32 7 1 GG E E T E E E ee ee ee eee 32 Ao UU SINC de CLC IN ENERO
12. all possibilities have been covered Please consult your network administrator for details on any existing network and the options available for adding an extra device to the network 6 1 Direct Connection to PC Configuration 1 Crossover Cable Figure 12 Direct Connection Example The above figure illustrates a possible connection method between a logger and a computer fitted with a network card It is imperative that a crossover type network cable be used in this instance Logger e Set Logger Network configuration to use Automatic Mode See Section Net Config e IP Address is automatically set Computer e Should be set to auto configure Linking to Ngara is then achieved by entering the IP address allocated to the unit The address allocated by Ngara can be viewed through the LCD using the menu items provided Please contact your network administrator to enable Windows Auto IP configuration utility Issue 2 12 Page 58 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 2 Direct Connection to PC Configuration 2 Networ
13. by displaying Session Flushing 3 A Swap Disk message appears once the internal buffers have all been written to disk The user then has 10 seconds to swap the USB storage device 4 Ngara then checks the new USB storage device to determine if it is useable A session error will be displayed on the LCD if the USB storage device is not useable Issue 2 12 Page 28 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 5 5 WAV Setup This menu item toggles the recording and format of raw data This can be set to any of the following e OFF e 48kHz 16bit auto ranged e 12kHz 16bit auto ranged e 12kHz 8bit single range e Noise Camera Compatible 48kHz 16bit single range Note This menu item will not appear if a session is running To change the wav file recording setup the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display current setting Pressing SELECT will scroll through allowable settings OFF 48kHz 12kHz 12kHz 16bit NCam Pressing ENTER will store changes 4 5 6 Tweight Setu
14. connections C Do not allow virtual private connections EN Select the username and password which will be used to confirm identity New Connection Wizard User Permissions You can specify the users who can connect to this computer Select the check box next to each user who should be allowed a connection to this computer Note that other factors such as a disabled user account may affect a user s ability to connect Users allowed to connect I s HelpAssistant Remote Desktop Help Assistant Account E s juan aguero juan aquera ngara user Remote Ngara Ij sshd sshd privsep Add Remove Properties lt Back Cancel Select Internet Protocol TCP IP and click the properties button New Connection Wizard Networking Software Networking software allows this computer to accept connections from other kinds of computers Select the check box next to each type of networking software that should be enabled for incoming connections Networking software Y Internet Protocol TCP IP File and Printer Sharing for Microsoft Networks v B8 virtual Machine Network Services Uninstall Install Properties Description Transmission Control Protocol Intemet Protocol The default wide area network protocol that provides communication across diverse interconnected networks lt Back Cancel Issue 2 12 Page 66 of 70 Acoustic
15. do any one of the following e Start a logging session e Stop a logging session e Record reference levels e Flush current internal buffers to disk Indication of the results of each command can be viewed through Ngara status information group as described in section 5 2 3 5 8 1 Starting a Session The logger can be set to start a session by navigating to the following menu item Session Control Start HE NGARA Remote Host V2 1 Session Control Disk Detail View Help x Stop sls Take Reference Change Disk A new window will pop up allowing the new session to be named Current logger configuration can be viewed and or changed by clicking on the Update Configuration button Start Session X Session Settings Session Mame Update Configuration sw Cancel Indication of the start session command can be viewed through the logger s status information group 5 8 2 Stopping a Session The logger can be set to stop a session by navigating to the following menu item Session Control gt Stop HE NGARA Remote Host V2 1 Session Control Disk Detail View Help Stark 39 1 Take Reference zs Change Disk Indication of the stop session command can be viewed through the logger s status information group Note The internal buffers must be flushed before Ngara returns back to the Standby state Issue 2 12 Page 52 of 70 Acoustic Research Labs Pty
16. provided with the modem router to ensure the correct network cable is used A 3G modem will be required to use the Ngaras power connector as to not drain the battery NOTE THIS IS AN INTERNAL MODIFICATION AND CANNOT BE USED AT THE SAME TIME AS THE REMOTE PUSH BUTTON TRIGGER Logger e Canuse DHCP IP Mode care must be taken whilst using Manual mode to ensure there are no conflicts with other computers on the network See Section Net Config e When using DHCP mode IP Address Netmask and Gateway are set automatically Due to the nature of 3G devices their network address IP address will always be private That is they cannot be contacted rather they contact you Because of this there are extra requirements when setting up a 3G connection Issue 2 12 Page 62 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 5 1 Setting up with Data Security Ngara can be setup to act as a Virtual Private Network VPN Client This allows Ngara to log into a remote server with user name and password This point to point secure tunnel ensures no third pa
17. shown in the example above This will cause the AUX output to turn on between 3pm and 5pm every Monday Server Settings There numerous ways to set up a Virtual Private Network VPN server both with hardware specific devices and software based solutions This manual will only cover the VPN server which is shipped with Windows XP For other solutions please contact your network administrator Setting up the VON server is achieved through the Network Connections window amp Network Connections Oj x File Edit View Favorites Tools Advanced Help ae Q Back v r wi Search li Folders e F x i j Address Network Connections Go LAN or High Speed Internet Local 4rea Connection Connecter dd i Intel R 82562V 2 10 100 Net Wizard wa New Connection Wizard Network Setup Wizard E f 3 objects Start the new connection wizard by double clicking on the New Connection Wizard icon Click Next when prompted New Connection Wizard Welcome to the New Connection Wizard This wizard helps you Connect to the Internet Connect to a private network such as your workplace network Set up a home or small office network To continue click Next E Cancel Issue 2 12 Page 64 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process with
18. the Ngara remote host software 6 5 3 1 Setting up with a 3G modem and Static IP address Using a 3G SIM card with a static IP address will make connecting to the Ngara much easier Go to the Ngara s configuration and set the following dle Time Out OFF Ancillary Time Out OFF Under Net Config set the following IP mode Manual IP address 192 168 000 010 Netmask 255 255 255 0 Gateway 192 168 000 001 To setup 3G modem and the Ngara some settings on the 3G modem need to be changed these are Allow port forwarding on the modem for ports 3000 3001 in TCP UDP protocol Allow port forwarding on the modem for port 21 in TCP protocol These are accessed in the modem s configuration interface Advanced gt Port Forwarding As well as these setting changes the provider for the 3G service needs to be entered along with any other necessary information Such as APN username and password need to be entered This can be entered on Network gt WAN These are accessed in the modem s configuration interface by selecting WAN on the menu Issue 2 12 Page 69 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0
19. wave file data File Session Control Detail view Help Logger Results Engine Get Detail Info Download Session Stats Results SPL A 15 2 dB Remote Format SPL C 13 7 dB Gather EL XXX Skatistics LegA 15 248 mL__Reconsitute Waveries Re Format Drive Leg C 13 5 dB Wave Files The recorded 48 kHz wave files are linear from the noise floor of the instrument to approximately 97dB 1kHz From 97dB to 120dB the gain has been reduced to allow 100dB of dynamic range within 16 bits In order to see the full dynamic range within the wave file the user is required to reconstitute each wave file This involves the conversion of each sample into 32 bit values Calibration factors are used from the stored data to reconstitute the 48 kHz file to 32 bits displaying linear 100dB dynamic range Winamp is recommended for playback of the 32 bit wave files as this is the only player that can handle 32 bit floating point samples that are greater than 1 0 5 9 6 Re Formatting a USB Device File Session Control Detail View Help Logger Results Engine Get Detail Info Download Session Stas Results SPL A 15 2 dB Remote Format SPL C 13 3 dE Gather EL XXX Statistics Leq 15 2 dB Reconsitute Wave Files Leg C 13 9 dB A drive which has been previously formatted by a Ngara can be re formatted using a PC This clears all data on the drive and updates the drive format information file NOTE A DRIVE MUST ALWAY
20. written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 3 4 2 Enclosure Front The front of the enclosure is provided with the following connector e Microphone Connector Inserting the plug and screwing it in until firm connects the microphone lead to Ngara Microphone Connector Figure 2 Logger Enclosure Front 3 4 3 Enclosure Top The top of the enclosure houses the local user interface The local user interface consist of the following items e ALiquid Crystal Display LCD e A lt WAKE UP gt pushbutton Used to control the power to peripheral devices e A lt SELECT gt pushbutton Used to scroll through menu items e An ENTER pushbutton Used to select menu items Please refer to section 4 for details on the local interface provided Wake Up Button LCD Enter Button Select Button Issue 2 12 Page 15 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty
21. 2 12 Ngara User Guide Page 18 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A Level 7 Building 2 423 Pennant Hills Rd coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Level dB 10 20 50 100 wa 2 pee Hz The diagram above shows the influence of windscreen WS 10 on acoustical properties of microphone referred to microphone response without windscreen The influence of the windscreen WS 10 on the acoustic performance of the microphone is within 1 0dB up to 12 5 kHz 3 5 7 Specifications Model UC 53A Nominal Diameter ie inch Sensitivity 28dB OdB 1V Pa Frequency Response 10 to 20 000 Hz Capacitance 12pF Diaphragm Type Titanium alloy foil Temperature Coefficient 0 005 dB C at 250Hz Humidity dependant Sensitivity Change 0 1dB or less at 250Hz RH below 95 no condensation Dimensions 13 2 diameter x 12mm Issue 2 12 Page 19 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Le
22. 33 4 8 1 UME ANN ir nau moansre 33 4 8 2 Logger State a ne ee a ee ee ee ee 33 4 8 3 LT D DEUCcU S 33 4 8 4 Session Errors cccccceccsceecesceecncseeecceeeesceeeesceneeceneecceneesceeeescueeecoesescsecesceseesceeeeseesesceeeesceees 33 40o Dik c ee ene ee ee eel a ee E 34 4 8 6 Main Battery State eesssssssssssssssseeeeeeeee nennen nennen nnns nna nnns inan nne s nna nnn nnns nna nns 34 4 8 7 Backup Battery State cccccccccssseeceeeeeeseeeeeeeeeeeeeeeseeeeceeesseaeeeeeeseeeeeeessseaeeeeessaeaeeeeeesaaess 34 48 8 Logger TMP SrALUN TOTUM 35 4 8 9 Low Backup Battery Warning ccccseeccccsseeeeceeeeeecceeeeeeseeceeeeueeeeseaeeesseaueeeeseaeeeesaeeeessaeees 35 4 8 10 Default Configuration Warning ccccccccssescccecseeeeceeeceeeeeeeeesseeeeeeeessaeeeeeeesseaeeeeessaeeeeeesaaaees 35 45347 TMM TOR Set VV arit eee cedente aou net unrodic ud et oades E E E EEEE EE R Ea RE 35 4 8 12 Found Internal Log File Warning ccccsesceccsseeeeeeeeeeeceeeeeeeeeeseeeeeaeeesaaeeeeesageeeessneessaanees 35 45 19 AGI COMMECHON SIAWS nasra EAA EE e EEE o E EE AE RERE 35 4 8 14 FIP Connection Statis Sarees ccsarceceisssensessvenocceesevacctdeteicevtaereresaneyocdetiuracesaveeaecstcanecetasesaqsniteneceds 35 ALBAN Wave Record MOOG A eds 35 2 NIMM OS THING MOAS AN 35 5 OPERATING NGARA REMOTELY sei
23. 800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au T Unimax Unimax WAN Interface Setup Status This page allows configuring network authentication information LAN A 7 h connection retrial and scheduler timers WAN Maxconnect Mode Modem Router Y Password oaii Profile Custom X Advanced APN Name internode Administrator Choose the 3G service provider and enter the relevant information for that provider underneath Once this has been set up connect the modem with the Ngara through their Ethernet ports turn on the power and wait for the modem and the Ngara to initiate The Ngara can then be accessed through the 3G network by using the host ngara software and typing the static IP address for the SIM card the host software will then connect to the ngara and be able to start and stop sessions and behove just like it would if connected directly to a computer 6 5 4 Keep Alive Setting This is to make sure that router is on line all the time If enable is chosen the router will ping the nominated IP address with interval time and IP set by user on 1st or 2nd or both server The ping fail count is incremented only if all configured servers fail to respond If the count reaches the preset value then the router will be reset and re connect again Log into the IP address at ETM Pacific open Network and then select WAN Scroll down to where it says Keep Alive
24. Auto Contig Pswd Password ooo000 Manual Settings IP Address i i IF Metmask Calibration Logger Calibration Factors le Factors alibration Factor 0 0 IP Gateway Range Multiplier 0 0 OF Cancel Apply Network Settings Issue 2 12 Page 40 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 3 2 Wave File Configuration Tab The session configuration tab allows the selection of the wave file recording mode Allowable modes include 1 2 3 4 o High Resolution Wave File 48kHz 16 bit Low Resolution Wave File 12kHz 16 bit Lower Resolution Wave File 12kHz 8 bit Noise Camera Compatible Wave File Off Configuration Wave ig ir ULTRICIES DEO File 2 eee DURUM Setting are File Recording Mode High Resolution 48kHz 16 bit Low Resolution 12kHz 16 bit Lower resolution 12kHz 8 bit Noise Camera Compatible wave File Ma Wave File OF Cancel Apply Issue 2 12 Page 41 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under
25. B A C for IEC 61672 3 Self generated noise e Microphone Noise Floor 20 dB A typically e Electronic Noise Floor 20 dB A typically with microphone short circuit 2 2 Environmental Reference Conditions Reference environmental conditions used for specifying the performance of the Ngara logger are e Air Temperature 23 C e Static Pressure 101 325 kPa e Relative Humidity 5096 e Settling Time 10 seconds e Time interval to stabilize after changes to environmental conditions 5 minutes 2 3 Adjustments to Indicated Levels Calibration is performed using the remote host software Section 5 5 or via the push button interface Section 4 4 6 Recommended calibration components e Acoustic Calibrator NC 74 Using the above calibrator a reference tone at 94dB A is equal to 94 00dB A as seen by Ngara 2 4 Extreme Inputs e Maximum Acoustic Input 125dB e Maximum Electrical Input 11V peak to peak e Allowable Supply Voltage 10 8 to maximum14V DC Logger will shutdown at 10 8V Issue 2 12 Page 7 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www
26. EG C Duration SPL C Percentile LEG C Percentile AMS Detection Timer C Remote Switch Parameters AMS Level 312 Record Pre T rigger s Record Past T rigger 2 Ja In this example Ngara will set a trigger event as soon as the RMS is greater than 3 12 It will then record 7 seconds of internal buffered data followed by 8 seconds of raw data after the trigger event RMS Trigger Example Trigger Trigger SET RESET Required Level 3 i v JN 2 un c e Record Pre Trigger Record Post Trigger Issue 2 12 Page 44 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd Level 7 Building 2 423 Pennant Hills Rd A I 7 g2 423 coust C Pennant Hills NSW AUSTRALIA 2120 Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 Labs Pty Ltd www acousticresearch com au 5 3 3 4 Setting a Time Based Trigger The following example illustrates how to set time based wave file recording Configuration q X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock ALES Output UDF Outputs M Triggering Enabled Type C SPLA Duration LEG 4 Duration SPL A Percentile LEG 4 Percentile SPL C Duration LEG C Duration SPL C Percentile LEG C Percentile C AMS Detection Timer
27. L XXX Statistics ESI NGARA Remote Host 2 1 File Session Contral Detail View Help Logger Results Engine Get Detail Info Download Session Stats Results SPL 4 15 2 dE Remote Format sic raza EL ea Leq 15 2 dB Reconsitute Wave Files Re Farmat Drive Leq C 13 5 dB Statistical analysis is performed on an entire logging session that can be found locally on the host computer This can be either after a detailed download or by browsing the contents of the USB disk used to record the session Desired Freq Weighting Desired Stat Interval Desired Percentiles Desired Output Format Issue 2 12 Extract Statistical Data ml x Desired Short Term Leq Freg Weight A Weighted C C Weighted Short Leg Iv Enabled Interval zec a Interval 15min Required Percentiles FB fo fo feo fre fo fe Convert Ta EL 316 Format C EL 215 Format Convert Cancel Page 56 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 9 5 Re Constitution of
28. Ltd www acousticresearch com au 3 5 Microphone Ngara uses a UC 53A RION microphone attached to a NH 17 with 5 metre cable preamplifier These components comply with the specifications of AS1259 and IEC 61672 and as such are highly sensitive Whilst they have some resistance to environmental effects care should be taken when the microphone is to be exposed to rain and other extremes in weather Wind and rain shields are available as an option for Ngara 3 5 1 Mounting Options To achieve compliance with the stated standards the supplied UC 53A microphone and NH 17 preamplifier must be mounted to the end of the supplied microphone post To make these posts easy to set up and pull apart we recommend dipping the post screws in a lubricant such as vasoline This makes the posts easier to screw into each other and it also stops them from becoming stuck after being left in the field for a few days 3 5 2 Frequency Response The frequency response of a sound field microphone is expressed as the frequency response in the reference direction of incidence 0 The diagram below shows an example for the frequency response of a UC 53A microphone Level dB 20 50 100 200 500 Tk 2k 5k gt 10k 20 k Freguency Hz Issue 2 12 Page 16 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission fr
29. Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 8 3 Taking a Reference Level Reference levels can be recorded to the log file by navigating to the following menu item Session Control gt Take Reference Session Control Disk Detail View Help Start ETES Stop Hes sP GP Change Disk Reference Level X Reference Levels J 15 3 dBA 13 7 dBC Try Again Continue Note Ngara does not prompt the user to take a reference level at any stage of the logging session Ngara is capable of storing many reference levels throughout the course of a running session 5 8 4 Changing Disk Internal buffers can be flushed ready for a disk swap over by navigating to the following menu item Session Control gt Change Disk Session Control Disk Detail View Help Stark sis Stop Take Reference Change Disk A window will pop up giving the user an indication when the disk is ready to be swapped Issue 2 12 Page 53 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyri
30. Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 5 Logging Menu Item Menu 2 4 5 1 Start Session This menu item starts a logging session As this session is started through the local interface instead of a remote PC the session name cannot be entered thus Ngara creates a name based on current date and time A session will not be able to be started if any of the following conditions are met e There is no valid disk found or e Logger time has not been set by the RTC due to an internal battery fault Upon selection of this menu item an instantaneous results message will be displayed on the LCD for two seconds to confirm that the session has started or has failed to start Note This menu item will not appear if a session is running Previous session settings Trigger settings timers etc are stored in internal memory and are remembered each time the unit is turned on To start a session using the LCD the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will create a session name based on date and time 3 Once the session has started a Session Running message will appear on the LCD If the session cannot be started an error message will appear on the LCD 4 5 2 Stop Session This menu item stops a logging session Upon selection of this menu item a Session Flushing message will appear on the display to indicate final flushing
31. S BE FIRST FORMATTED USING NGARA NGARA DETERMINES SPECIFIC DRIVE SPIN UP TIMES WHICH CANNOT BE DETERMINED USING A PC NOTE NGARA IS NOT COMPATIBLE WITH USB 3 0 NOT ALL USB DRIVES ARE COMPATIBLE WITH NGARA ONLY USE THE USB DRIVES SUPPLIED WITH THE UNIT Issue 2 12 Page 57 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd ACOUStIC Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 NETWORK CONFIGURATION OPTIONS Hemote connection to Ngara is achieved using the Ethernet port provided Care must be taken to ensure Ngara has not disabled the network connection This can be easily checked by visually inspection the lights provided on the Ethernet connector once a physical connection to a network has been established In the event the Ethernet interface is disabled it can be re enabled by disabling the ancillary timeout delay Refer to section 4 4 2 or by pushing the wake up button Default port numbers used are e 3000 Logger Control e 3001 Session Downloads The following sections cover only some of the allowable configurations Due to the vast number of different network configurations possible not
32. acousticresearch com au 2 5 Nominal A Weighted Sound Levels FREQUENCY HZ IDEAL NGARA DIFFERENCE ALLOWABLE 1 1 Issue 2 12 Page 8 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 3 GENERAL DESCRIPTION OF LOGGER Ngara is a Class 1 instrument IEC 61672 3 2006 Type 1 AS1259 1 1990 amp AS1259 2 1990 consisting of the following components e Weather proof case e 12V DC Battery e USB Storage Device e Ngara Instrument e Microphone amp Pre Amp e Host Software Required for advanced features only 3 1 Weather Proof Case Ngara is housed in a rugged weatherproof case To open the case unclip the two latches at the front of the case When closing the weatherproof case ensure the microphone lead is carefully guided through the cut out provided Failure to carefully guide the cable through the cut out provided will cause irreparable internal damage to the microphone cable To attach the microphone post simply screw the base of the post into the mounting found on the lid On the outside of each latch a reinforced hol
33. and reset any overload condition pressing ENTER will exit This display is updated once a second 4 6 6 RMS Detection Displays current and peak RMS algorithm results An overload condition is indicated with an Once within this menu item pressing lt SELECT gt will reset the display pressing ENTER will exit This display is updated once a second 4 6 7 Exit Return to top menu structure To return to the top level menu structure the following steps must be carried out 1 Activate menu item by pressing ENTER Issue 2 12 Page 31 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 7 Disk Menu Item Menu 4 4 7 1 Disk Status Displays current disk status which can be any of the following e Unknown Disk e Disk Powering up e Disk Removed e Disk Present e Disk Present Format Required Once within this menu item pressing ENTER exits the menu item lt SELECT gt has no effect 4 7 2 List Sessions Displays current saved sessions found on disk Once within this menu item pressing ENTER exits the menu item pressing
34. art may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 4 Configuration Menu Item Menu 1 4 4 1 Idle Timeout The idle timeout menu item allows toggling of the idle time out setting either ON or OFF The idle timeout setting is preset to 2minutes If this timeout is reach Ngara will power down if not recording To change the current timeout settings the following steps must be carried out 1 Activate menu item by pressing lt ENTER gt 2 Ngara will display current setting Toggle setting using the lt SELECT gt button 3 Confirm selection by pressing lt ENTER gt 4 4 2 Anc Time out The ancillary timeout menu item allows toggling of the ancillary time out setting either ON or OFF The ancillary timeout setting is preset to 2minutes If this timeout is reached Ngara will power down its Ethernet port whilst recording and not connected to a remote host To change the current timeout settings the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display current setting Toggle setting using the lt SELECT gt button 3 Confirm selection by pressing lt ENTER gt 4 4 3 Net Config Net Configuration allows the set up of the Ethern
35. ch Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd videi Pennant Hills NSW AUSTRALIA 2120 Ngara Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 3 Changing Logger Configuration Logger configuration can be updated by navigating to the following menu item File Logger Configuration gt Change Configuration Session Control Disk Detail View Help Logger Configuration k Change Config Sleep Set Time Exit Calibrate GPL C 14 1 dB Update Software All settings are stored in internal memory and are remembered during power cycles 5 3 1 General Logger Configuration Tab Ngara configuration tab allows general configuration changes to be made 1 Idle Timeout Logger automatically turns off whilst in standby and no activity is detected after 2 minutes 2 Ancillary Timeout Logger powers off its Ethernet interface to reduce power consumption if no network activity is detected for more than 2 minutes In the event of an Ethernet power down timeout it can be manually re enabled by pressing the wake up button or automatically re enabled through the use of the alarm clock function 3 Network configuration settings can be updated Please refer to Section 6 for details on network configuration options Configuration E3 General Configuration Network Configuration Enable Idle Time Out f Using DHCP Remote Iv Enable Ancillary Time Out t Win Compatible
36. command At the completion of this the current logger IP address is displayed on the LCD To view currently assigned IP address the following steps must be carried out 1 Activate menu item by pressing lt ENTER gt 2 Ngara will display its IP address Pressing lt SELECT gt will have no effect Pressing ENTER will exit IP Address Menu Item Manual Mode only Required Manual IP address of logger Used when IP mode is set to Manual To set current IP address the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display its current IP address 3 Each digit must be entered separately selected digit is shown by cursor Pressing lt SELECT gt will increase selected digit by one Pressing ENTER will confirm current digit and move to next digit 4 Once the final digit is reached pressing ENTER will confirm entered address Netmask Manual Mode only Required Manual Netmask of logger Used when IP mode is set to Manual To set current Netmask the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display current Netmask 3 Each digit must be entered separately selected digit is shown by cursor Pressing lt SELECT gt will increase selected digit by one Pressing ENTER will confirm current digit and move to next digit 4 Once the final digit is reached pressing ENTER will confirm entered Netmask Gateway Ma
37. cussoddtersa rsa a a a a E E 6 2 REFERENCE SPECIFICAT TIONS nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn unir mU nnan 7 2 1 Acoustic Reference Conditions eese nennen nnne nnns nain nnns nna nnn nnns 7 2 2 Environmental Reference Conditions cccccccsssccceseeeceeeeeceececseeceeeeeeesseeeeseaeeeseueesseeessgeeesseeeesees 7 2 3 Adjustments to Indicated Levels ccccccccccsssseccecceeeseceeeeeeeseceescseueeeeessaaaeeeessseaecesessaaeeeeessaaaeeeess 7 2 MEE i on dio i e if 2 5 Nominal A Weighted Sound Levels ssssssessisssssssseeeeen eene enne nnne nnns nnn nnn nnns nnn 8 3 GENERAL DESCRIPTION OF LOGQGER 11 1 ccce LL LLL LLL rre rcc c c rc le eene eere eee es naa a aa mr sees asas as rrr rus 9 Bek WSUS M dios E e E E T A A E A O E A T 9 A GS BA eE E R E E A A E 9 SOME IB QUII cess 10 3 3 1 U BE IS dio P RR T 10 332 Accessing Ro ela UTE EE TEE 14 3 9 8 Maintaining Disk Access Speeds cccccccsesseceeeceeseeceeeceeesecececsaueeeeessaaseeeeessaaseeeesseeneeeeeeaas 14 or NOA an E E E EE 14 3 4 1 Enclosure Back cccccsesceccsesececceescecceeseeecsaueceeseauecessaeeessaeeeesauseeeseaueeessaeeesseuseeessageesssageees 14 3 4 2 ENICIOSUFGS F PONT ericsson ea aa aain iaaa aia 15 3 4 3 Enclosure Top oe 15 3 9 MICODRNONO cc ints set
38. ded The trigger is reset when the level falls below 60dB A for more than 5 seconds Once reset Ngara records a further 20 seconds of raw data Level Trigger Example Trigger Trigger SET RESET Required Level OFF Time Record Pre Trigger Record Post Trigger Moise Level in dBA Issue 2 12 Page 42 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 9 3 3 2 Setting an SPL or Leg Percentile Trigger The following example illustrates the parameters required to enable a percentile trigger Configuration X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock AU Output UDF Outputs v Triggering Enabled Trigger dd Params Type C SPLA Duration LEGA Duration SPL A Percentile LEG 4 Percentile SPL C Duration LEG C Duration SPL C Percentile LEG C Percentile C AMS Detection Timer C Remote Switch Trigger Type Parameters Setting Level SPL EO Record Fre Trigger 3 fao Reg Ln X 28 Record Post T rigger 2 20 Stats Duration min iE Ngara can be set to continually monitor th
39. e current percentile levels over a given time period In the above example a level of 60dB A must be reached within L95 This percentile is calculated over a 5 minute period This period can only be set to a maximum of 5 minutes in one minute blocks When trigger is set 30 seconds of internal buffered data is recorded This buffer can be set to a maximum of 480seconds 8 minutes Once the L95 falls below 60dB A Ngara records a further 20 seconds of raw data Percentile Trigger Example Trigger Trigger SET RESET Required Level m Record Pre Trigger Record Post Trigger Ln Noise Level in dB Issue 2 12 Page 43 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 3 3 3 Setting an RMS Trigger For Engine Brake Analysis The following example illustrates how to set an engine brake trigger Configuration i X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock AU Output UDF Outputs vw Triggering Enabled Type C SPLA Duration LEGA Duration SPL Percentile LEG 4 Percentile SPL C Duration L
40. e is provided to allow for security measures such as padlocks chains etc 3 2 12V DC Battery Ngara can be configured to operate using two different sized batteries The configurable battery sizes include e 24Ahr Allows for up to a maximum of 2 weeks of continual CSV data only logging and up to 1 week worth of CSV and WAV file data recording e 12Ahr Allows for up to a maximum of 1 week of continual CSV data only logging The above figures are a guide only and assume use of a fully charged battery The above is also dependant on available disk space Battery status can be viewed using the LCD or the remote control software Main battery voltage is indicated as a percentage calculated using the following relationship 13 8V Battery Voltage 10 8V 096 10096 Assumed 96 Note Real life battery discharge rates are not linear thus you will find battery voltage dropping much faster as the voltage decreases Issue 2 12 Page 9 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 3 3 USB Disk Drive Ngara will store all logging data to an e
41. e to next digit Once the final digit is reached pressing ENTER will confirm entered password 4 4 5 Time and Date Allows the date and time stored in Ngara to be updated Note This menu item is not accessible once in logging mode To set current date and time the following steps must be carried out 1 2 3 Notes Activate menu item by pressing ENTER Ngara will display a snapshot of the date and time when the ENTER button was pressed The Date must be entered first followed by the time Time is entered as a 24hr value Each allowable number must be entered separately selected number is shown by cursor Pressing lt SELECT gt will increase selected number by one Pressing ENTER will confirm current number and move to next number Once the final number seconds is reached pressing ENTER will confirm entered date and time e Numbers are clipped to a pre determined range 1 to 31 for day 1 to 12 for month etc However it is possible to enter invalid date configurations i e 31 day 02 month In this instance an error message will appear stating Invalid Parameter e Year number has been set to clip at 2030 returning to 2000 Issue 2 12 Page 25 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Build
42. earch Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 OPERATING NGARA REMOTELY The Ngara noise logger provides remote interfacing capabilities through the use of specialised software allowing the user to e Configure logging parameters e Configure triggering and alarm parameters e Start Stop logging sessions e Display current configuration information e Display current logger status and results information e Carry out disk operations e Calibrate Logger Note Loggers running software version 5 00 and above must use host software version 2 1 and above 5 1 Installation of Host Software The installation of the host software is carried out using the installation USB provided or by downloaded the software from Acoustic Research Labs website The USB should Auto Run once inserted in the USB drive If this is not the case it can be manually started by double clicking on the file autorun exe found on the root directory of the USB 13 Ngara Remote Host V2 Welcome to the Ngara Remote Host V2 Setup Wizard The installer will quide you through the steps required to install Ngara Remote Host V2 on your computer WARNING This computer program is protected by copyright law and international treaties Unauthorized duplication or distribution of th
43. em Configuration SPLA Duration LEG A Duration C SPL amp Percentile LEQ 4 Percentile f SPL C Duration LEQ C Duration SPL C Percentile LEO C Percentile AMS Detection Timer t Follow Alarm Clock Parameters Level SPL 0 00 ON Period s 0 OFF Period s 0 OF Cancel Apply As an example The Ethernet interface would normally be off whilst logging to conserve battery but it would turn on daily at 4 00pm for one hour via the alarm clock interface When the Ethernet interface is turned on 12V DC is also supplied to the 3G modem via the AUX output Issue 2 12 Page 46 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 3 6 UDP Output Tab Ngara is capable of sending results information to listeners via User Datagram Protocol UDP Configuration UDP Communication Configuration Ngara Output D ata IP Address SPLA SPL E Port Number 3002 C Leq t Leg t RMS Output Raw PCM Results OF Cancel Apply The IP address and port number is the SEND TO address that the Ngara unit will channe
44. et interface To enter Net Config menu item press lt ENTER gt IP Mode Menu Item There are three modes in which the Ethernet interface may operate 1 DHCP Ngara will obtain an IP address gateway and net mask via a DHCP server 2 Automatic Ngara will set a Windows Auto IP configuration compatible IP address 3 Manual The Ethernet interface can be configured with a static IP address along with a gateway and a net mask Please consult with your network administrator to determine the most appropriate network settings for your Ngara To change the IP mode of operation the following steps must be carried out 1 Activate the IP Mode menu item by pressing lt ENTER gt 2 Ngara will display current setting Pressing SELECT will scroll through allowable settings DHCP Auto Manual Pressing ENTER will store changes Issue 2 12 Page 23 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Curr Address Menu Item Automatic and DHCP Modes only Refreshes Ethernet interface and re configures IP address Similar to windows Network Repair
45. fer to the documentation provided with the modem router for details on how this is achieved Issue 2 12 Page 60 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 4 Connection to a Wide Area Network WAN Figure 15 WAN Connection Example The above figure illustrates a possible connection method between a logger and a WAN using a modem Special care must be taken in setting up the network settings on Ngara to ensure there are no network conflicts The easiest way to achieve this if a DHCP server is running on the modem is to set Ngara to automatic IP mode Most modems support both crossover and straight through type network cables thus any may be used in this instance Refer to the documentation provided with the modem router to ensure the correct network cable is used Logger e Canuse DHCP IP Mode care must be taken whilst using Manual mode to ensure there are no conflicts with other computers on the network See Section Net Config e When using DHCP mode IP Address Netmask and Gateway are set automatically Linking to Ngara is
46. g 2 423 Pennant Hills Rd coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au ee TYPE WB a string Current trigger type Level SPLA Level SPLC Level LEQA Level LEQC Stat SPLA Stat SPLC Stat LEQA Stat LEQC Time TRIG LEVEL float trigger level In the TRIG LEVEL 94 0 units set in TRIG TYPE entry TRIG ON Required ON time for level TRIG ON 5 trigger Number of seconds a level trigger needs to be set before an actual trigger is set TRIG OFF Required OFF time for level TRIG OFF 5 trigger Number of seconds a level trigger needs to be off before an actual trigger Is reset PE mns EI used for statistical eee PERCENTILE 95 PE mns o tg TRIG STAT Statistics duration in minutes TRIG STAT unnm 5 PERIOD period for statistical trigger TRIG PRE REC Number of seconds to record TRIG PRE REC LENGTH 15 LENGTH BEFORE trigger event exch POST REC 0 AFTER of seconds to record TRIG POST REC LENGTH 10 E dE RPT trigger event TRIG TMR START char string Start time for timer trigger TRIG TMR START 01 02 00 00 00 In the format DD MM HH MM SS TRIG TMR END char string End time for timer trigger TRIG TMR END 10 02 18 00 00 In the format DD MM HH MM SS TRIG TMR RPT char string Repeat mode for timer trigger TRIG TMR RPT DAILY e Hourly e Daily dssue242 a Page 13 of 70 Acoustic Research Labs
47. ght Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 9 Disk Operations Main data storage functions can be found under the Disk menu item Through this menu item it is possible to do any one of the following e Get current storage media detailed information capacities shown in days e Download session data e Format current disk e Perform statistical analysis on 100ms session data e Re Constitute Wave Files e Re Format Ngara Drive 5 9 1 Detail Storage Media View A detailed view of current USB storage device can be seen by navigating to the following menu item Disk Get Detail Info ESI NGARA Remote Host V2 1 File Session Control Logger Results Engine Results SPL A 15 3 dB Detail View Help iet Detail Info Download Session Stats Remote Format Gather EL XXx Statistics SPL C 13 9 dB Reconsitute Wawe Files Leg A 15 2 dB Re Farmak Drive Leq C 14 0 dB A detail window will pop up with details on current inserted USB device 5 9 2 Downloading Session Data oession data can be downloaded via the Ethernet interface by navigating to the following menu item Disk gt Download Session Stats
48. h Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 6 Status Menu Item Menu 3 4 6 1 Show Status This menu item scrolls through current logger operation configuration and errors if any Refer to Section 4 8 for details Once within this menu item pressing lt SELECT gt will scroll through each item Pressing ENTER will exit from the status screen 4 6 2 Live SPL Displays the current SPL Both A and C weighted An overload condition is indicated with an Once within this menu item pressing lt SELECT gt has no effect pressing ENTER will exit This display is updated once a second 4 6 3 Max SPL Displays maximum SPL for both A and C weighted level An overload condition is indicated with an Once within this menu item pressing lt SELECT gt will reset the display pressing ENTER will exit This display is updated once a second 4 6 4 Short Leg Displays current short 100ms time averaged Leg Both A and C weighted An overload condition is indicated with an Once within this menu item pressing lt SELECT gt has no effect pressing ENTER will exit This display is updated once a second 4 6 5 Long Leg Displays current long Time Averaged Leg Both A and C weighted Averaging starts once menu item is entered An overload condition is indicated with an Once within this menu item pressing lt SELECT gt will re start the averaging time
49. he Ethernet port only Click Next New Connection Wizard Devices for Incoming Connections You can choose the devices your computer uses to accept incoming connections Select the check box next to each device you want to use for incoming connections Connection devices Conexant D850 55K V 3 DPvc Modem O Y Communications cable between two computers COM2 Properties lt Back Cancel Issue 2 12 Page 65 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Select Allow Virtual private Connections and click Next New Connection Wizard Incoming Virtual Private Network VPN Connection Another computer can connect to yours through a VPN connection Virtual private connections to your computer through the Internet are possible only if your computer has a known name or IP address on the Internet If you allow VPN connections the system will modify the Windows Firewall settings to allow your computer to send and receive VPN packets Do you want to allow virtual private connections to this computer Allow virtual private
50. ing 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 4 6 Sys Cal Allows Ngara to calibrate to a known source To calibrate the following steps must be carried out 1 Apply reference tone 1kHz 94dB is recommended 2 Activate calibration mode by pressing ENTER 3 Ngara will wait until the expected level is entered using SELECT and ENTER Pressing SELECT increases the value of each selected digit by 1 Pressing ENTER selects the next digit 4 Once the expected level is entered the user is given the chance to confirm or cancel calibration Y confirms entered value N cancels calibration Pressing SELECT toggles between Y and N Pressing ENTER accepts value Note This menu item is not accessible once in logging mode 4 4 7 Exit This menu item returns to the top level menu structure To return to the top level menu structure the following steps must be carried out 1 Activate menu item by pressing ENTER Issue 2 12 Page 26 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research
51. is program or any portion of it may result in severe civil or criminal penalties and will be prosecuted to the maximum extent possible under the law Cancel Back Figure 7 Main Installation Screen The install package will create shortcuts to both the desktop and the start menu Installation is now complete Issue 2 12 Page 36 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 2 Main Screen x a NGARA Remote Host V2 10b x File Session Control Disk Detail View Help Logger Results Engine Brake Analysis Results SPL A 47 63dB es O O SPL C 63 23dB M O o Leq A 46 36dB ME Leq C 63 03dB FAST lt 125m_ Status General Logger Information Logger State Logger in Standby Back Up Battery Session State No Session Started Main Battery Logger Operations Logger No Operations Serial Number Disk State Disk Present Date 03 07 2012 Time 09 21 47 Session Error Session Name No Session Started IP Address 10 0 0 33 Figure 8 Main Program Window The main window of the application disp
52. is stored as single channel 16 bit data If the signal condition field states signal is in the high range the data needs to be multiplied by the logger s saved multiplication factor Triggered PCM Data Files are rotated in the event that a triggered wave files exceeds two hours duration Data is stored as single channel 16 bit data If the signal condition field states signal is in the high range the data needs to be multiplied by the logger s saved multiplication factor Session Log File oession information messages along with any session errors are displayed within the log file Ngara maintains a copy of this log file in its internal memory This allows correct error logging even in the event the USB connection is lost If no disk errors are encountered during a session the internal log file is always flushed to the USB disk However if there were errors found the log file must be manually flushed at the end of the session Issue 2 12 Page 11 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Session Information File session settings are also stored to
53. ivity on port 1723 to the server s IP address Linking to Ngara is then achieved by entering the IP address allocated by the VPN server into the host software This can be viewed by viewing the properties page of the established connection Issue 2 12 Page 68 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 5 2 Setting up without Data Security In some cases it may not be possible to open the point to point tunnel protocol port 1723 In these instances data security will not be possible however a connection may still be established One way to achieve this is by using a third party service such as www dyndns com which allows Ngara to be accessed using a domain name rather than its IP address Please consult with your network administrator to ensure the router and Ngara are setup correctly as they may already have a preferred third party dynamic DNS service 6 5 3 Setting up with a static IP address Some wireless providers now support public static IP addressing This then only requires the user to type in the given IP address supplied by your ISP into
54. k DUB E100 Figure 13 Direct Connection Example The above figure illustrates a possible connection method between a logger and a host computer which is not fitted with a network card or its current network card is already being utilised The above configuration has been tested with the following USB to Ethernet converter e D Link USB 2 0 Ethernet Adapter DUB E100 Software Version V3 30 Hardware Version B1 Logger e Can set Logger to use DHCP IP Mode if host computer is already connected to a network See Section Net Config e Must set logger to use Automatic or Manual mode if host computer is not connected to a network Computer e f host computer is already connected to a network a network bridge may be required between the two network connections e Must set IP Address Netmask and Gateway if host computer is not connected to a network Linking to Ngara is then achieved by entering the IP address allocated to Ngara or by using ngara XXXXXX where XXXXXX is the Ngara serial number Please contact your network administrator to create a network bridge or to determine if a DHCP server is running on the existing LAN Issue 2 12 Page 59 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd
55. l the information into Note Using IP address 255 255 255 255 will cause Ngara to send broadcast messages to all network devices The output data can only be ONE of the 5 results that Ngara calculates along with the optional raw data sample values The raw data sample values sent will match the configuration set in the wave file configuration tab refer to section 5 3 2 thus may not always be 48 kHz Note Whilst the output of raw data is enabled a session cannot be started as Ngara will not have enough processing power to write the raw sample values to both USB and Ethernet Please contact Acoustic Research Labs for UDP message structures Issue 2 12 Page 47 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd 5 9 7 P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Advanced Configuration Options Advanced configuration options include Issue 2 12 Simple Network Time Protocol SNTP When Ngara is connected to the internet it can synchronise its clock with an external time server This option must be used with extreme care as very large time changes during a logging session may resul
56. lays the data Ngara is gathering It also displays any current logger warnings along the bottom status bar These warnings cannot be reset Please contact Acoustic Research Labs if any warning messages appear 5 2 1 Linking to a logger The software can connect to any Ngara as long as the software is told where to look This is dependant on the network configuration settings set on the Ngara unit using the LCD screen refer to Section 4 4 3 Knowing a units IP address is similar to knowing a phone number before placing a phone call It is with this address that the remote host knows where to find Ngara If the Ngara can be found within a local network and is set to DHCP mode refer to Section 4 4 3 Ngara may also be accessed using the following address name ngara XXXXXX where XXXXXX is the unit s serial number This name is then converted to an IP address by the DHCP server thus saving the need to remember IP address numbers For details of very basic network configurations please refer to Section 6 as there are numerous network configuration options please consult with your local network administrator for other possibilities This section will assume that a correct network topology has been implemented and the units IP address is known To link to a Ngara 1 Enter loggers IP Address 2 Press the Link Button 3 A password prompt will appear Enter loggers remote password 4 Connection will be established To disconnect f
57. lls NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 3 4 Alarm Clock Tab Ngara is capable of setting an alarm clock that may be implemented to conserve battery power It can be set up to power itself on log for a certain time period and turn itself off The settings for the logging session may be set up using any of the previous tabs It can also be set up to control the power to its Ethernet port to conserve battery whilst logging Power Eth Configuration Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock ALIS Output UDP Outputs Advanced Settings Email W Alam Wake Up Enabled Control Start Time End Time Log 2 4 24 PM 2 40 24 PM Hieaccuring Power Eth Disable Hecurence Day oC 83 OF Cancel Apply As an example The Ethernet interface would normally be off whilst logging to conserve battery but it would turn on daily at 4 00pm for one hour to allow for remote interrogation 5 3 5 AUX Output Tab Ngara is capable of supplying 12V DC 1A to power external devices The output can be set up in a very similar fashion to the wave file triggers refer to section 5 3 3 It can also be set up to follow the alarm clock when the alarm clock is used to control power to the Ethernet port This allows the 12V DC output to be used to control power to an external 3G mod
58. lt SELECT gt scrolls through the found session names 4 7 3 Disk Size Displays current disk total size in days Once within this menu item pressing ENTER exits the menu item lt SELECT gt has no effect 4 7 4 Disk Free Displays current disk free space in days Once within this menu item pressing ENTER exits the menu item lt SELECT gt has no effect 4 7 5 Format Disk Formats currently inserted disk A confirmation option is presented before formatting proceeds The lt SELECT gt pushbutton is used to toggle between Y and N during confirmation the ENTER pushbutton is used to confirm the selection Note This menu item will not appear if a session is running 4 7 6 Exit Return to top menu structure To return to the top level menu structure the following steps must be carried out 1 Activate menu item by pressing ENTER Issue 2 12 Page 32 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 8 Status and Idle Screen The idle screen is displayed when the following occurs e Through the Show Status menu item
59. mmended NOT to delete sessions from drives but rather format the drive using either Ngara or the host software 3 4 Ngara The electronics are housed in a silver aluminium enclosure The unit is classified as per Group X for susceptibility to radio frequency fields and has been tested to AS NZS CISPR 22 and thus is approved for connection to any network Note The electronic circuitry contains many calibration settings that are essential for Ngara to operate correctly Opening the enclosure will void the unit s calibration and warranty There are no user serviceable parts inside the enclosure 3 4 1 Enclosure Back The back of the enclosure contains the following connections e Power Aux connector 4 pin e Ethernet communications port RJ 45 e USB ports 2x USB ports The RJ45 can be accessed to provide a communications link to Ngara The USB ports allow the connecting and disconnecting of a storage device The power connector should not require any attention during normal operation Note Data WILL be lost if the storage device is removed during a logging session Please refer to section 4 5 4 for details on ensuring there is no data loss Power Connector USB Ports Ethernet Connector Figure 1 Logger Enclosure Back Issue 2 12 Page 14 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without
60. n Used to control the power to peripheral devices e A lt SELECT gt pushbutton Used to scroll through menu items e An ENTER pushbutton Used to select menu items The lt SELECT gt and ENTER push buttons have been configured to allow the user to keep buttons depressed to simulate multiple push button presses 4 2 Powering the Unit To turn Ngara on press and hold the wake up button until NGARA is displayed on the LCD Note if the power cable has been unplugged or the Ngara has been turned off please wait 1 2 minutes before trying to turn the Ngara back on Issue 2 12 Page 21 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd i Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea reh Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide La bs Pty Ltd www acousticresearch com au 4 3 Menu Structure Figure 4 Menu Structure The menu provided follows a tree structure Cycling through each menu item is achieved through the lt SELECT gt push button whilst selecting a menu item is achieved through the lt ENTER gt pushbutton Issue 2 12 Page 22 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no p
61. ni a audes us nai dns cua ue Reize sioe eR e adeu clerk NIE Deus 36 Ost BOstallalom OL HOSE SOMWAN Cie eucnicitun i dedican ous tos Edeiuene sam ubt dad uus ioquit vludubeso nas edad ctas qd esr dud uum 36 SP MEN bee icc EE mom 37 5 2 1 PIII TO JOGOCK MT TUER 37 o22 Mereen ne ee eer een eae ee eee ree en ee eet ne eee ete ee eee 38 orc NS ot Sal ONO e 38 5 2 4 The General Information Group ccccccccsssssseececccccesssseeeeecceseaaseeeeeeeseeeaasseeeeeessseeassseeeeess 39 o3 Changing Logger CohllgulgtlOTi secs uera oou cx ta seio raeb eb rete sbs iaaa UU RbanP seus e Pese tee ekex tese EO Rien 40 5 3 1 General Logger Configuration Tab cccccccsssecccccssseecceeceeeseceeeeeeeeeeeeeseeeeeeessseaeeeeeesaeeeeeeeeeas 40 5 3 2 Wave File Configuration Tab eeeeeesssssesssesseeeee nennen nennen nennen nnn nnn nnn nnn 41 5 3 3 Trigger Configuration Tab esssssesssesseseeeenneeeenn nennen nennen nnne nnn nnns nna nnn nnn nn 42 5 3 4 PIU Nr 46 S MEE SP dO V 01M TaD RE 46 5 36 UDP UO Tab p P 47 5 3 7 Advanced Configuration Options ccccccccsescscccceecscseeseeeceeeeeeseeeseeeeceeeessseeseeeeeeeesseaageeeeeeess 48 EAU Wetec E gc penne acct EE A scnanaes ase EA E TEE 49 sr LOGOS LMC ireupcintracninentotsensticonss E EEE E E EE T N 50 Boa a D O en a EER EEEE EEE EEEE AA SEEE 50 Note A
62. nual Mode only Required Manual Gateway address of logger Used when IP mode is set to Manual To set current Gateway IP address the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display current Gateway 3 Each digit must be entered separately selected digit is shown by cursor Pressing lt SELECT gt will increase selected digit by one Pressing ENTER will confirm current digit and move to next digit 4 Once the final digit is reached pressing ENTER will confirm entered gateway Issue 2 12 Page 24 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd Acoustic Level 7 Building 2 423 Pennant Hills Rd Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 4 4 Net Password This menu item allows the set up a six digit password for remote PC connection To set current network password the following steps must be carried out 1 e 3 Activate menu item by pressing ENTER Ngara will display current password Each digit must be entered separately selected digit is shown by cursor Pressing lt SELECT gt will increase selected digit by one Pressing ENTER will confirm current digit and mov
63. of data to disk is taking place Upon completion of the data flushing Ngara will return to the top level menu structure Note This menu item will not appear if no session is running To stop a session using the LCD the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will indicate the internal memory is being flushed to the USB storage device 3 Once the internal memory has been cleared the LCD will return to the top level menu item Issue 2 12 Page 27 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 5 3 Take Ref This menu item allows the recording of a reference level Upon selection of this menu item a message will appear on the display indicating the levels to be recorded to the log file Both A and C weighted levels are recorded to the log file Pressing the lt SELECT gt pushbutton will re take the reference levels Pressing the ENTER pushbutton will accept and record the reference levels A reference tone may be recorded during any stage of the logging session Note This menu item will not appea
64. om Acoustic Research Labs Pty Ltd Level 7 Building 2 423 Pennant Hills Rd Pennant Hills NSW AUSTRALIA 2120 Ph 61 2 9484 0800 A B N 65 160 399 119 WWW acousticresearch com au Acoustic Research Labs pty Ltd 3 5 3 Directional Response Ngara User Guide The directional characteristic of a microphone is a measure of its differing sensitivity for sound waves arriving from various angles Since the pre polarised condenser microphone used in Ngara is a pressure sensitive type it should be equal in all directions However refraction and cavity effects cause a certain microphone directional response at high frequencies The diagram below shows the directional response for the UC 53A microphone et CHS 400 fi ect EH N LA fl W 70 n SS S L ie 1000 Hz Woman eg x NX XS AN 12500 H2 246 XL fA 120 3 5 4 Thermal Characteristics The thermal characteristics of a microphone include indicate how sensitivity changes at various temperatures This is influenced by the choice of materials and the design of microphone Normally materials with a linear expansion coefficient are used The diagram below shows the thermal characteristics of a UC 53A microphone at 250Hz Level dB Temperature C Issue 2 12 Page 17 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without writ
65. or e Ngara is idle for more than 120 seconds or e connecting the remote PC application The screen circulates through current logger information and any warnings or errors that may be present It is possible to speed up circulation by using the SELECT pushbutton It is also possible to exit the idle screen by pressing the ENTER pushbutton unless a remote PC connection is found In this case the HCI Connection status screen is displayed Not all screens may appear as some screens are skipped if no valid information is present For example the HCI Connection Status screen is skipped if no remote PC is connected 4 8 1 Time and Date Current time and date is displayed Format DAY MONTH HOUR MIN SEC 4 8 2 Logger State Current logger state is displayed This may be any of the following e Logger Init e Logger Standby e Logger Recording 4 8 3 Session State Current session state is displayed This may be any of the following e Session Running e Session Flushing e Disk Error e Disk Removed Note This screen is skipped if there is no session started 4 8 4 Session Errors Current session error is displayed This may be any of the following e Disk Full Error e Disk Write Error e Disk Format Error Note This screen is skipped if there is no session error Issue 2 12 Page 33 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reprod
66. out written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Select Setup an Advanced Connection and click Next New Connection Wizard Network Connection Type What do you want to do C Connect to the Internet Connect to the Internet so you can browse the Web and read email C Connect to the network at my workplace Connect to a business network using dial up or YPN so you can work from home a field office or another location C Set up a home or small office network Connect to an existing home or small office network or set up a new one Connect directly to another computer using your serial parallel or infrared part or set up this computer so that other computers can connect to it Sees Select Accept Incoming Connections and click Next New Connection Wizard Advanced Connection Options Which type of connection do you want to set up A Select the connection type you want JP Allow other computers to connect to this computer through the Internet a phone line or a direct cable connection C Connect directly to another computer Connect to another computer using your serial parallel or infrared port Seen Do not select any additional devices as we will be using t
67. p This menu item toggles the time weighting applied This may be set to any of the following e 125ms e Dms Note This menu item will not appear if a session is running To change the wav file recording setup the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display current setting Pressing SELECT will scroll through allowable settings 12ms 5ms Pressing ENTER will store changes 4 5 7 Trigger Setup This menu item toggles the stored trigger settings ON or OFF only Trigger settings can only be altered using the remote host software this menu item allows the user to disable or enable these settings only Note This menu item will not appear if a session is running To change the enable or disable triggering the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will display current setting Toggle setting using the lt SELECT gt button 3 Confirm selection by pressing ENTER Issue 2 12 Page 29 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 5 8
68. r Configuration k Change Config sleep exit Calibrate GPI E 14 0 dB Update Software All settings are stored in internal memory and are remembered during power cycles Logger date and time along with current logger GMT time zone information can be updated x Mon Tue Wed Thu Frio Sat Sun 30 31 1 2 3 4 5 6 7 8 83 10 11 Te 13 14 15 16 1 18 13 20 21 22 wan 24 25 26 er 26 29 30 1 2 3 4 BH E T B Hg 18 lt Today 2370472009 3 19 19 PM The date time and time zone information can be entered manually or the PC Time button provided can be used This sets the current time date and time zone to match that of the PC being used 5 5 System Calibration Internal calibration factors can be updated by navigating to the following menu item File gt Logger Configuration gt Calibrate Session Control Disk Detail wiew Help Logger Configuration k Change Config Sleep Set Time Exit Calibrate GPL C 14 7 dB Update Software All settings are stored in internal memory and are remembered during power cycles xj Level dBA 34 After applying a 1 kHz reference level enter in the expected reading in dB and the logger will perform a system calibration Note A steady signal must first be detected before the OK button is enabled Issue 2 12 Page 50 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be
69. r if no session is running The user is not prompted to record reference tones at any stage during a logging session The user is able to take an unlimited number of reference tones throughout the logging session If wave file recording is enabled a one second recording of the reference tone is stored as a wave file which can be played back to obtain reference levels on measuring equipment it is suggested wave file is played back in loop mode using your favourite player To take a reference tone using the LCD the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will indicate the current measured levels both A and C which will be stored Pressing SELECT will re take the reference levels Pressing ENTER will store the reference tone 4 5 4 Change Disk This menu item allows the flushing of the current logging session without stopping the session This allows the change over of storage devices without any loss of data Upon selection of this menu item a Session Flushing message will appear on the display to indicate flushing of data to disk is taking place Once this is completed the user will be prompted to Swap Disk Note This menu item will not appear if no session is running To swap a USB storage device using the LCD the following steps must be carried out 1 Activate menu item by pressing ENTER 2 Ngara will indicate the internal buffers are being flushed to disk
70. rect Statistics The Ngara logger works out required statistics before sending data through network greatly reduces network traffic Download Due to the large amount of data stored it is highly recommended to directly browse the stored sessions on the USB storage device 5 9 3 Remotely Formatting a USB Drive A USB device which is attached to Ngara may be formatted by navigating to the following menu item Disk gt Remote Format NGARA Remote Host 2 1 File Session Control Detail View Help Logger Results Engine Results SPL A 15 2 dB Get Detail Info Download Session Staks Remote Format Gather EL XXX Statistics SPL C 13 8 dB Reconsitute Wave Files Leg A 15 2 dB Re Format Drive Leg C 13 7 dB Issue 2 12 Page 55 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd Level 7 Building 2 423 Pennant Hills Rd A I 7 g2 423 coust C Pennant Hills NSW AUSTRALIA 2120 Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 Labs Pty Ltd www acousticresearch com au 5 9 4 Performing Statistical Analysis Ngara User Guide A Ngara session directory 100ms CSV files can be converted to a statistical representation of the data by navigating to the following menu item Disk gt Gather E
71. reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 6 Logger Shutdown The logger can be forced to power down by navigating to the following menu item File gt Sleep NGARA Remote Host V2 1 Disk Deka Session Control Logger Configuration Exit Note Ngara waits for any running disk and memory operations before shutting down 5 7 Logger Reboot For logger versions V7 06 it is possible to remotely reboot by navigating to the following menu item File gt Reboot ai NGARA Remote Host 2 4 1 Session Control Disk De Logger Configuration b Sleep Exit Issue 2 12 Page 51 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 8 Logger Control Main logger control is achieved through the Session Control menu item Through this menu item it is possible to
72. rom a remote logger 1 Press the Disconnect button or close the application Issue 2 12 Page 37 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 2 2 The Results Group Through the results group it is possible to view all of the current results simultaneously Results SPLA 51 5dB EET OMNE o SPLC 71 1dB ETE LEQ A 518dB TU MEE S LEQ C 707dB ETT Ems Results RMS 24dB p SPL 51 8dB p Figure 9 Logger Results Groups Through the results group it is also possible to 5 2 3 Change current time weighting Only available whilst in standby mode Enable maximum hold markers through the tick boxes provided Reset the maximum hold markers through the push button provided Note that the displays are updated every 100ms The Status Group General logger status messages can be viewed through the status group box Status Logger State Logger in Standby Session State No Session Started Logger Operations Logger Mo Operations Disk State Disk Removed Session Error Figure 10 Status Group The status gro
73. rty can view data passing between the server and the client Ngara utilises standard port number 1723 for its Point to Point Tunnelling PPTP protocol Ngara Logon Settings Lonfiguration X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock As Output UDF Outputs Advanced Settings FTF User Settings W FTP Enabled Usemame ngara Password password Simple Network Time Protocal RITM Iv SNTP Enabled Prim Server ji 29 127 40 4 Sec Server Remote Server Logon v Logon to Remote Server Enabled Server ji 21 215 223 61 LI seram naara user Password password OF Cancel Apply The dotted are above shows the data entry fields required to be filled in to configure Ngara as a VPN client Server IP Address of remote server to log into Username and Password Log on credentials Ngara power Settings In order to maximise battery life Ngara can be setup to control power to the modem router configuration Alarm clock settings can be used to control power to both the Ethernet port and the 12V DC auxiliary output Configuration X Logger Configuration Wave File Configuration Trigger Parameters Alarm Clack AUX Output UCF Outputs Advanced Settings W Alarm Wake Up Enabled Type C One Shot End Time 5 00 00 PM Disable Start Time 3 00 00 PM Renccuring Recurrence Daily
74. scoresiadinraekiaseaarmedissaiadssareiadusarsnidedesaiosdibiadbiyiarasadsianscdiadeaohacdatdasdiniataiadeiesaekiadaaalandes 16 3 5 1 Mounting Options scheche2 cc2ssesbchsnctesiacasedsdncetaestesanectantagiesdeseealsantasetedssetasscbtagbacdesehedsditaseredsvehosdea 16 3 5 2 Frequency WS SINS Siac aap ascrtieicetneandtaen cient aanteintanced dxtamnctvrinnndieniul esteunlaneisdetepastintnaudientadathieianeth 16 3 5 3 Directional Ei jelel I TOES 17 3 5 4 Thermal Characteristics RETO o Tm 17 S STEM Soler Resize m 18 3 5 6 Reduction of Wind Noise by Windscreen sseeessssssessseeeeeeeeenenennnn nennen 18 Jor eo elezione 19 So POST ONT cmm 20 4 OPERATING NGARA LOCALLY iui iios ed aun xud sd Rau nuce Iu ux E Dores Md uiu aue acu Mutua DE OUO MENO NRISSUDUdE 21 EE 0 09 di tii Hic ERE 21 Bee To i e BB II E Om 21 A S MEME E Ue UE RR 22 4 4 Configuration Menu Item Menu 1 sssesssssssseesennneeennn nennen nn nn nnn nnns nnn nnns 23 4 4 1 fe Wal 23 Ln to PANS EMS o m m 23 kado NO OODI t 23 AAA INCU SS WO eea E beds oe E E E 25 AAG VVC AG OAC e A E E N 25 OVS AI anian aeaaee EE E EEE E EEE EE E E AE EA 26 AA Ene E a E E E EE AE EEE E ai 26 4 5 Logging Menu ltem Menu 2 ccccccccseeeeeeeeeeeeeeeeeeeeeneeeeeeseeseeessaaeeeeaeeeeeessaeeeessaeeeessageessaeeeeesaaes 27 4 5 1
75. ssage Displayed only when backup battery voltage is lower than 2 7V Please contact Acoustic Research Labs if this warning appears 4 8 10 Default Configuration Warning WARN Config Logger configuration not loaded from internal flash warning message Displayed only when logger configuration failed to load correctly Please contact Acoustic Research Labs if this warning appears 4 8 11 Time not Set Warning WARN RTC Time Logger time not properly set at start up warning message Please contact Acoustic Research Labs if this warning appears 4 8 12 Found Internal Log File Warning WARN Log File Internal session log file found 4 8 13 HCI Connection Status Displays a HCI Connected message whilst a remote PC connection is detected Note This screen is skipped if there is no remote connection detected 4 8 14 FTP Connection Status Displays a FTP Connected message whilst a remote FTP connection is detected Note This screen is skipped if there is no FTP connection detected 4 8 15 Wave Record Mode Displays current wave file recording mode 4 8 16 Triggering Mode Displays current triggering configuration Note This screen is skipped if triggering is not enabled Issue 2 12 Page 35 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Res
76. ssue 2 12 Page 5 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 1 INTRODUCTION 1 1 Scope This document provides a description of the functions provided by the Ngara logger platform All displays user tools facilities and capabilities are herein 1 2 Overview The Ngara Sound Acquisition System offers full measurement flexibility simultaneously producing the following acoustic measurements Fast or Slow SPL A Fast or Slow SPL C Leg a Leg c In addition to the above measurements the Ngara platform is able to store raw audio data to a USB disk drive capable of post processing the majority of your acoustic needs All of this is achieved in a low power 12 volt environment Simple control and configuration of Ngara can be accomplished through the on board Liquid Crystal display LCD and push button interface More advanced control functions are made available through the remote host software This may include Alarm functions Triggering events Auxiliary Output Configuration Virtual Private Networking The logged data is saved as a forma
77. steady signal must first be detected before the OK button is enabled 50 BO Loder AULON eee E E E E E EAs 51 o OJE TO en E EEN E E E E E E E 51 Do OOS ECON Olas E E E T A EE E ese 52 5 8 1 SeS pe EEE A E mE 52 582 StEPHINO A SESSION sescenti tee seceneenscenseecccntneesesnascessdesgesmeen eee nconseaeeiceteieeiccneneneqatenceescuteasaeeus 52 Issue 2 12 Page 4 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 8 3 Taking a Reference Level EET 53 5 84 Changing DISK teases cet parse ceria ieraled im trnesncetn na denak aae arate asta aaa asa Eiend Eaa a aE aidi 53 T DISK OC AIAG m NRTR cE MM 54 5 9 1 Detail Storage Media View cccccccccsesseceecceeeeceecceeuseceesseaueeeeesseaaeeesssaaeceesseaaeeeeessaaeeeees 54 5 9 2 Downloading Session Data ccccccccssseeecsseeeeeeeeseeeeseeeeeeeeeeceeseeseeesseeeeeseeeeeseaueeesseneessaaeeees 54 5 9 3 Remotely Formatting a USB Drive sseeeesssssesssssssseeeenneeennnn nennen nnne 55 5 9 4 Performing S
78. t in some loss of data ARL recommend using this setting only when Ngara is configured in a non logging configuration for example when Ngara is used solely to relay results via UDP secondary server address may be left blank if not required Note For V7 06 onwards Ngara supports variable SNTP refresh rates These are set to pre determined values using a provided sliding bar Remote Server Logon Address of remote virtual private network server and authentication credentials File Transfer Protocol Setup FTP Ngara can share the contents of the USB drive operating as a FTP server The server is only operational whilst in standby mode as this ensures the drive remains ON and disk access is restricted to only FTP operations Restrictions o Username and password can only contain numbers and letters o The FTP server was written to be compatible with the freely available FileZilla client Configuration Logger Configuration Wave File Configuration Trigger Parameters Alarm Clock AL Output UDF Outputs Advanced Settings Email Simple Network Time Protacal SHTF FTF User Settings iv SNTP Enabled iv FTP Enabled Prim Server PO Username Sec Server D Password Refresh Hate 480 sec Remote Server Logon AI 1j LIsername Password OF Cancel Apply Page 48 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no par
79. t may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd 5 3 8 Email Tab Level 7 Building 2 423 Pennant Hills Rd A I 7 g2 423 coust C Pennant Hills NSW AUSTRALIA 2120 Resea rc Ph 61 2 9484 0800 A B N 65 160 399 119 Labs Pty Ltd www acousticresearch com au Ngara User Guide Ngara email tab allows users to set Leq levels which will send an email detailing the time at which the given Leq level was reached and what the Leq was Up to 5 email addresses can be listed Configuration Alarm Settings Frequency Weight A Ns Interval 15 min Ln Z Ln X Ln x4 Leg Issue 2 12 Level Level Level Level Server Settings SMTP Server From Email To Email 1 To Email 2 To Email 3 To Email 4 To Email E Bk Cancel Apply Page 49 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd idee Pennant Hills NSW AUSTRALIA 2120 Ngara Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 4 Logger Time Logger time can be updated by navigating to the following menu item File Logger Configuration gt Set Time Session Control Disk Detail View Help Logge
80. tatistical Analysis lssseesssssssssssessseeseee nnne nnne nnne nnn nnne nnns 56 5 9 5 Re Constitution of wave file data ccccccccsseecceeecseseeceeeeeeeeeceeeeseeeeeeeesseaeeeeeesseaeeeeeessesseeeeeeas 57 596 Fre Onna a DEVICE ais datas ech eee eta neta igiene e tle t ces wheat he cot mNe 57 6 NETWORK CONFIGURATION OPTIONS eeeec eere iiseeeee nennen nnn n nna a ann sna nasa asas ann osea ananas 58 6 1 Direct Connection to PC Configuration 1 sese 58 6 2 Direct Connection to PC Configuration 2 cccccccccseseeceeecseeseeeeeeeeeeeeeeesaeeseeeeeesaaeeeeessaeeeeeesaaees 59 6 3 Connection to a Local Area Network LAN sseessessseeeeennneeennenm nennen nnns 60 6 4 Connection to a Wide Area Network WAN esssssesseeeeeeenen nennen nnn nnne nnns 61 6 5 CONNECTION using 3G device ssssssssssssssssssseeeeeen eene nnne nnne nnns sse nain nnn ness n aa rn nn nnns 62 6 5 1 Setting up with Data Security sseesesssssessseseeseee nennen nennen nennen nnne nnns nnne nnn 63 6 5 2 Setting up without Data Security essssssssssssssssssseeeee enne nnn nnne nnne nnns 69 6 5 3 Setting up with a static IP address sseeeessssessessssseeseneeenene nnne nnne nnns 69 6 5 4 Keep Alive Setting lsseesssssssssssesseeeenenennnnn nennen nennen nnn nnn nnn nnne rna nnn anrea nns 70 I
81. ten permission from Acoustic Research Labs Pty Ltd Research n Level 7 Building 2 423 Pennant Hills Rd A jc Level7 Building 423 coust C Pennant Hills NSW AUSTRALIA 2120 Ph 61 2 94840800 A B N 65 160 399 119 Labs Pty Ltd www acousticresearch com au 3 5 5 Humidity Characteristics The humidity characteristics of a microphone indicate how sensitivity changes at various humidity levels The diagram below shows the humidity characteristics for a UC 53A microphone at 250Hz Level dB Relative humidity 3 5 6 Reduction of Wind Noise by Windscreen During outdoor measurements wind noise can falsify measurement results To counter such problems the recommended windscreen WS 10 should be mounted on the microphone The characteristics of the WS 10 windscreen are shown below The attenuation of wind noise produced by the windscreen is about 25dB with frequency weighting A and 15dB with frequency weighting C Wind noise level dB A C 1279 zj Microphone only oot d EI 3 1 IIS LI D ad ee o 1 JL L un P aes EI E NENNEN NI LLE ao FH i 60 2 5 1G 20 Wind velocity m s Wind velocity m s Frequency weighting A Frequency weighting C TJ z _ 29 mj e BS oa gt F o 8 mma ig aa a CD A LL A LL Ll Llglil 20 50 100 200 500 Frequency Hz Frequency response of wind noise measured with windscreen WS 10 mounted on a microphone Issue
82. the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 3 3 Trigger Configuration Tab Raw wave file triggering modes can be adjusted through the Trigger Parameters tab Triggering can be set as one of the following 1 Ata predetermined SPL or Leq Level Once a predetermined Percentile reaches a required level At a predetermined RMS Level RTA Engine brake analysis Timer based pre x I Hemote Push Button 9 3 3 1 Setting an SPL or Leg Level Trigger The following example illustrates the parameters required to enable a level trigger Configuration Trigger if Triggering Enabled Params ype f SPLA Duration LEG 4 Duration amp SPL Percentile C LEG 4 Percentile f SPL C Duration LEG C Duration SPL C Percentile C LEG C Percentile AMS Detection Timer Remote Switch Trigger Type Parameters Setting Level SPL 80 00 Record Pre Trigger 3 20 OM Period s 0 Record Post T rigger s 20 OFF Period s 0 Bk Cancel Apply In the above example a level of 60dB A must be reached for 5 seconds before triggering is asserted When trigger is set 30 seconds of internal buffered data is recor
83. the session directory a NE SERIAL char string Logger serial number LOGGER SERIAL 878000 MAC Address Not including ARL s OUI which is 0050C2 DATE char string Logger date of manufacture in DATE MANUFACTURED MANUFACTURED the following format 22 05 08 DD MM YYYY Logger software version VERSION V1 2 float Logger calibration absolute CALIBRATION 11 21 RANGE float Logger range multiplier RANGE MULTIPLIER 13 6 MULTIPLIER calibration absolute SESSION START char string Session start time SESSION START 10 02 2008 18 00 00 In the format DD MM YYYY HH MM SS SESSION END char string Session end time SESSION END 24 02 2008 18 00 00 In the format DD MM YYYY HH MM SS TWEIGHT char string Time Weighting TWEIGHT 125ms e 125ms e 1s Wave file recording on or off WAVE RECORDING ON WAVE FREQ char string Wave file sampling frequency WAVE FILE FREQ 48kHz Po sai e 12kHz WAVE DEPTH char string Wave file number of bits WAVE FILE DEPTH 16bit e 8bit WAVE RANGING char string Wave file auto ranging WAVE RANGING ON D e or e OFF TRIG SETTING char string Triggering setting TRIG SETTING ON e ON e OFF Issue 2 12 Page 12 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A Level 7 Buildin
84. then achieved by entering the IP address allocated to the modem It is recommended to obtain a static IP address for the modem as a dynamic address may change every couple of days To access Ngara ports 3000 3001 must be forwarded to Ngara by the modem Refer to the documentation provided with the modem for details on how this is achieved Issue 2 12 Page 61 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 6 5 Connection using 3G device Figure 16 3G Connection Example The above figure illustrates a possible connection method between a logger and a 3G network using a 3G router The 3G router allows a number of different USB modem devices to be connected to Ngara using its Ethernet interface Special care must be taken in setting up the network settings on Ngara to ensure there are no network conflicts The easiest way to achieve this if a DHCP server is running on the modem is to set Ngara to automatic IP mode Most modems support both crossover and straight through type network cables thus any may be used in this instance Refer to the documentation
85. tory contains the following e Session log file Record errors during the logging session e Session information file Used to store logger configuration during the logging session e Data directories Directories in which logging data is stored Data Directories A new data directory is created once the number of files within the current data directory reaches a high water mark This is currently set to 900 This is done to avoid the WinCE 5 0 limitation of 999 files per directory 999 files may be reached during a triggered session CSV Data Logged data stored in 100ms blocks Files are rotated every hour on top of the hour with filenames corresponding to time and date The following is the CSV header information stored into each CSV file Session Name 20090524 194427 Logger Serial Number 878001 Date 24 05 2009 Hour 19 Temperature 28 Time SPL A SPL C LEQ A LEQ C Signal Condition Battery Data is stored into each CSV file every 100ms Time stamp n the format lt mm ss msec gt SPL values SPL values taken as a snapshot every 100ms Leg values Leg values time averaged over the 100ms period Signal Condition ndicates signal condition at time of snapshot Battery Indicates battery voltage at time of snapshot Continuous PCM Data Continuously recorded wave data if selected by the user Files are rotated every hour on top of the hour with filenames corresponding to time and date Data
86. tted list of Sound Pressure Level measurements in a Comma Separated Variable CSV file Samples are taken every 100ms The data gathered is capable of being post processed to produce any required statistical representation of the data obtained Both CSV file data and raw data wav file are split into 1 hour long files A new file is created every hour on the hour with each logging session stored into separate directories 1 3 Applicable Standards e AS 1259 1 1990 amp AS 1259 2 1990 o Type 1 e IEC 61672 3 2006 o Class 1 e AS NZS CISPR 22 2006 o Class A Issue 2 12 Page 6 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 2 REFERENCE SPECIFICATIONS 2 1 Acoustic Reference Conditions The reference sound pressure level and frequency to be used when calibrating the Ngara logger are e Level 94dB e Frequency 1kHz e Reference Direction Along centre axis of microphone preamplifier Note that the 94dB SPL is also to be used as the starting SPL for all level linearity tests Linear operating range e 25 110 dB A C for AS1259 e 25 120 d
87. uced by any process without written permission from Acoustic Research Labs Pty Ltd n Level 7 Building 2 423 Pennant Hills Rd A jc Level7 Building 423 coust C Pennant Hills NSW AUSTRALIA 2120 Resea rch Ph 61 2 9484 0800 A B N 65 160 399 119 Labs Pty Ltd www acousticresearch com au 4 8 5 Disk State Current disk state is displayed This may be any of the following e Disk Unknown e Disk Powering Up e Disk Removed e Disk Format Required e Disk Present 4 8 6 Main Battery State Displays main battery voltage as a percentage 13 8V Battery Voltage 10 8V 0 100 Assumed Figure 5 Main Battery Assumptions 4 8 7 Backup Battery State Displays backup battery voltage as a percentage Battery Voltage 0 100 Assumed Figure 6 Backup Battery Assumptions Issue 2 12 Ngara User Guide Page 34 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd P Level 7 Building 2 423 Pennant Hills Rd Acoustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 8 8 Logger Temperature Displays internal logger temperature in degrees Celsius 4 8 9 Low Backup Battery Warning WARN RTC Batt Logger backup battery low warning me
88. up shows the following information Current Logger State Standby Logging Current Session State Running Error etc Current Logger Operations Determine if logger is busy i e Formatting a Disk Current Disk State Removed Present Format Required Current Session Error Displays Error Information during a logging session if any Session Name Current name of running logging session Issue 2 12 Page 38 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 5 2 4 The General Information Group The general information group displays current battery states along with date and time of logger and current logger s serial number General Logger Information Back Up Battery 100 0 E Main Battery 100 0 zx Serial Number ez DOC Date 07701 2008 Time 10 13 30 Figure 11 General Information Group Issue 2 12 Page 39 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Resear
89. vel 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 3 6 Host Software This application runs on most computers using the Microsoft Windows XP Vista and 7 operating environment The software provides the user with a graphical interface for all Ngara operations and also enables the control from a remote location via Ethernet internet For details on the host software refer to section 5 Issue 2 12 Page 20 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au 4 OPERATING NGARA LOCALLY The Ngara noise logger provides local interfacing capabilities allowing the user to e Configure logging parameters e Start Stop logging sessions e Display current configuration information e Display current logger status and results information e Carry out disk operations 4 1 Available User Interface The local interface provided by Ngara consists of the following e A Liquid Crystal Display LCD e A lt WAKE UP gt pushbutto
90. xternal USB storage device As a general guide the following can be used e 8Gb of space required per day for continual raw data and CSV logging e 40Mb of space required per day for continual CSV data logging Note USB 3 0 is not compatible Only USB 2 0 works with Ngara 3 3 1 USB Disk Layout USB Disk a session Data directory Rotated by N if gt 900 files written YYYYMMDD HH csv CSV file to store 100ms data uus SRERARRRRRRRRERERRRERRRRRRRRRRRRRERRRRRRHRRRRRRRZRRRRRRSRRRRRRRGRRRRHRRRRRRRRRRRRRRRRERRRERRRRRGRA YYYYMMDD HH wav PCM data if enabled Data NNN YYYYMMDD HHMMSS wav Triggered PCM data YYYYMMDD HHMMSS N wav if enabled Split into N files if triggered for more than 2 hours a session log i Session error log file a session inf Session settings file fmtinfo bak Disk record files Issue 2 12 Page 10 of 70 Acoustic Research Labs Pty Ltd This work is copyright Apart from any use as permitted under the Copyright Act 1968 no part may be reproduced by any process without written permission from Acoustic Research Labs Pty Ltd A P Level 7 Building 2 423 Pennant Hills Rd Coustic Pennant Hills NSW AUSTRALIA 2120 Ngara Research Ph 61 2 9484 0800 A B N 65 160 399 119 User Guide Labs Pty Ltd www acousticresearch com au Session Directory Each newly created session Is stored as a separate directory within the USB disk Each session direc

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