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OPERATING MANUAL

1. 13 45 a e Stop the delay test signal at speaker A tae Sica T ii Minirater ee Act Delo Galop TELAT ass am a J 8ms Delay Signal B 68 5 mz Act BQ ms cece MWinirater Distance ZAP 37 m Act Delo 6 0 B 5 ms 4 MLUDUDUUUTIUUOTIUUUUUUUT UTUI TUOI TUUT ITTI TIITII 6 5m Act C ms on on Measure Distance ZAP LO m UVQNQQQUUUUUNNNQQUUOONUONQQQUOOUUNNQQUUOONNSQQUUUOOONNQQQUUUOONNSNQUUTL 00 00 Hegzure 05 00 94 Automated Difference Calculation e The delay time difference between speaker A and B is automatically calculated and shown below the Act Delay result The delay time is measured Delay Test utilizes VoiceNote Microphone The XL2 uses the internal VoiceNote micro phone to measure the acoustic delay Do not connect any measurement microphone to the XL2 for the delay time measurement Measurement Position Do not position the XL2 too close to reflecting surfaces such as walls or floors The reflections are likely to prevent accurate measurements Delay Time INT AUDIO Result Interpretation e The resulting time in milliseconds shows the time difference of the sound signal from speaker A and B arriving at the measurement position Speaker B has to be delayed by the displayed difference result To optimize directionality add a further 5 ms to the calculated difference The main signal trom speaker A then arrives at the measure ment position first The acoustic signal from sub speaker B
2. INTi AUDIO This mechanical adapter piece mounts the XL2 on a microphone stand Adapters for 3 8 or 5 8 stands are included NTi Audio 600 000 372 The Battery Charger efficiently recharges the spare battery whilst you are using your XL2 Audio and Acoustic Analyzer One spare Li Po battery is included with the battery charger NTi Audio 600 000 332 The Digital I O Adapter serves to control external peripheral devices such as indi cating sound levels that exceed limits on a big external red orange green lamp It connects to the digital I O interface NTi Audio 600 000 380 211 INTi AUDIO 212 Further Information The XL2 Input Keypad offers four marker keys to trigger an event recording or cat egorize any noise during measurements Requires the optional Extended Acoustic Pack NTi Audio 600 000 384 89 4 dBA 85 3 dBLeq The XL2 Audio and Acoustic Analyzer con trols the external Stack Light via the Digi tal I O Adapter Box The light has three lamp sections colored green orange and red Applications e Sound level monitoring at live events or clubs The Stack Light shows orange for sound levels near the limit and red at levels ex ceeding the limits e Industrial noise pollution monitoring e Passed Failed measurements requires XL2 Spectral Limits Option NTi Audio Stack Light 600 000 382 Digital I O Adapter Box
3. LAF max a dB ITT E a es 10 ANGE 210 cnt oon on Press start Pm to measure and display the sound levels results indicated with Sound Level Meter INTi AUDIO e Select the frequency weighting A e Select the required time weighting e g LF Fast SLMeter 123 HLA E lt ast 12 24 SLMeter 123 LA E lt ast 13 24 7 mc n PANT AF HORE AF TIHE HEIGHTING 40 9qB E z VEQ LE LAE E LAeg See LAF max dB LAF maze dB TT SET ADUNE E SET ss aaas 10 RHGE 210 CNT GO Oooo 10 RAGE 210 CNT GO Oooo Pop up windows shown at installed Extended Acoustic Option Confirm with enter Confirm with enter 35 INTi AUDIO Sound Level Meter e Select the parameter off e Select the parameter live SLMeter 123 LAR E lt ast 13 24 S FRED WEIGHTING LAF TIHE HEIGHTING 3 PARAMETER LAeq 9 maz min T2 JE Ts fse LAF max mee LUULU LLLLT g EL i0 HGE 110 RHETT HH e Confirm with enter 36 SLHeter 123 LAR Bi ast 13 24 S FRED HEIGHTING LAF j TIHE HETGHTING T 3 FARAHETER Lae ie LAF max CORREKTION UUNNAANATUUUUTTI il FH GE 110 E cn GO e Confirm with enter SLMeter 123 LAR E lt ast 13 24 S 40 3dB LAeg LAF max a dB LLULL SET in ANGE 110 cnr ataoenn e Select further sound pressure levels as described above e g LAeg and L
4. B0 OdE 80 Tann Fre Hotch dB FREH 1 0000 kHz Switches among various screens depending on the menu function selected INTi Overview AUDIO Hold the speaker button down and adjust the level of the speaker and headphone outputs with the rotary wheel amp Digital gain control prevents gain increases be yond a level that will cause signal clipping The maximum gain setting depends on the connected Input signal The headphone output provides a linear output signal using the SLMeter function for input levels of approx 30 dBu and higher which equals at M2230 85 dBA M2211 92 dBA utilizing a pink noise test signal The power button switches the instrument on The XL2 is immediately ready for operation Holding down the power button for one second switches the XL2 off Additionally a brief press of the power button toggles the backlight during operation e SLMeter The limit button lights up green yellow or red according to the settings in the Limit page Press the limit button W to access the Limit page For more details FFT Tol The limit button lights up green for results within tolerance and red for out of tolerance results Polarity he limit button lights up green at positive polar ity and red at negative polarity e 1 12 Oct Tol The limit button lights up green for results within tolerance and red for out of tolerance results Lu Pauses the current measurement Press the pause but
5. E a INTi AUDIO The sound exposure level LAE is the LAeg normal ized to 1 second The sound exposure level is mea sured to compare noise events with different time durations The LAF reports the amount of noise from an event such as an individual aircraft fly over LAE LAeg 10 x log time in seconds with selectable time window from five seconds up to one hour Four individual levels can be config ured The moving time average sound level is an Leq based on a moving time window Sample 10h OOmin OOsec Start of XL2 measurement 10h OOmin 05sec Leqd Leg of this 5 seconds 245 INTi 246 AUDIO Appendix 10h OOmin 06sec Leq5 Leg of the time win dow trom 10h OOmin 01sec to 10h OOmin O6sec 10h OOmin 07sec Leq5 Leg of the time win dow from 10h OOmin 02sec to 10h OOmin 07sec Application example e Display the moving Leq over 5 seconds in accor dance with DIN15905 e Measure the moving Leg over 60 minutes in ac cordance with SLV2007 Time constant t 125 ms the time weighting is an exponential function of time which defines how changes of the instantaneous sound pressure level are averaged for useful sound pressure level results The measurement results are shown accu rately for sound sources with a minimum length of 0 5 seconds Fast time weighting Is typically used for common sound level measurements I For tracing of feedback frequencies in the RTA page The hold
6. True peak level in 1 1 and 1 3 octave resolution Clock Impulse Maximum Level TaktMax and values as specified in DIN 45645 1 FFT function High resolution Zoom FFT with selectable frequency ranges and resolution up to 0 4 Hz in the range of 5 Hz to 20 kHz RT60 function Reverberation time RI60 in 1 3 octave resolution The sound level meter offers different pages e Press page to toggle between the 123 SLMeter page and the RTA page e Select the page 123 SLMeter with the rotary wheel Confirm with enter iD 11 30 i SLHeter SREB ht ATA LAF Reporting Logging Event Trigger Limit LEO RSET Correction gt B Set EQT Le Leg 35 5dB LEPE FB 1 dE TTT E SE uiae OO AHGE 100 CHT ens Menu with enabled options INTi AUDIO Sound Level Meter Displays the selected broadband sound level results You can change the font size of the result Depending on the font size chosen the XL2 shows 3 or 5 results simultaneously Individual frequency weighting time weighting actual minimum maxi mum and correction values can be chosen for each displayed result Displays the 1 3 or 1 1 octave spectrum of the selected sound level within the audio band Additionally the wide band result is shown graphically by a bar Here you set which sound pressure levels shall be stored in a txt file after the completed measurement Choose between ALL Stores all sound pressure levels Selected Stores up t
7. LEFKE I 30 RAGE 130 cree cade e Select the user part of the file name The maximum length of the user part is 12 characters The right part _SLM_001 is defined by the XL2 to avoid overwriting of existing measure ments whereby SLM is the appendix for the measure ment function and 001 is an automatically incrementing number Data Management INTi AUDIO Voice notes are recorded speech annotations for each stored SLMeter 123 4 LRle T 4 asp 13 24 a measurement The XL2 utilizes the internal voice note micro FOLDER NEH DIR phone for the recording MyvProject Soave Test e Select Record Voicenote and press enter File REMAHE SEARCH My Test LM_B864 E Automatic Humbering SS Record Volcenote Ga CANCEL CACHE EHFTY SL Heter 123 4 LAlE Y ASD 13 24 S FOLDER MEH DIR LAF MyProject LEFKE File REMAHE SEARCH My Test SLM_664 YVOICEHOTE I 30 ANGE 130 m corgg ne 19 e Select SAVE and confirm with enter LOPE Il SET 40 ANGE 230 Eoo opii e Select REC and press enter e Record the voice note and press enter to finish Tick off Automatic Numbering to store actual measurement results for later overwriting with new results 173 INTi e Select the memory menu with the rotary wheel AUDIO Data Management confirm with enter e Select Save Screenshot and press enter e Select the file name and co
8. Nominal Spectral Correction for Frequency horizontal Sound Incidents HZ 1 3 Octave 1 1 Octave lt 400 0 0 0 0 400 0 1 500 0 1 0 1 630 0 1 800 0 1 1000 0 2 0 2 1250 0 2 1600 0 2 2000 0 1 0 0 2500 0 2 3150 0 9 4000 1 9 1 8 5000 2 6 6300 2 6 8000 3 3 3 4 10000 4 2 12500 5 2 16000 5 2 5 2 20000 5 2 Microphone PreAmplitier Frequency Range Residual Noise Floor typical Frequency Response Flatness Phase Linearity Maximum Output Voltage Electronic Data Sheet Impedance Power Supply Attenuation Connector Thread for Capsule Weight Dimensions Temperature Range Humidity NTi Audio INTi AUDIO Specifications MA220 PreAmplifier Compatible with 1 2 microphone capsules type WS2F in accordance with IEC61094 4 4 Hz 100 kHz 1 6 uV A at C_in 18pF 12 dBA 20 mV Pa 0 2 dB lt 1 20 Hz 20 kHz 21 Vpp 74Vrms 145 dBSPL 20 mV Pa THD 3 1 kHz e Containing user calibration data e Default factory sensitivity 4 9 V Pa e Read write by XL2 Audio and Acoustic Analyzer e NTi Audio ASD in accordance with IEEE P1451 4 V1 0 Class 2 Template 27 Input 20 GOhm 0 26 pF Output 100 Ohm balanced 48 VDC phantom power 3 mA typical lt 0 17 dB Rphantom 2x 6 8 kOhm Balanced 3 pole XLR 60 UNS2 90 g 3 17 oz Length 142 5 mm 5 6 diameter 20 5 mm 0 8 10 C to 50 C 14 F to 122 F 5 to 90 RH non condensing 600 040 040 The product specifications m
9. Reverberation time RT60 in 1 3 octave resolution e SLMeter RTA function True peak level in 1 1 and 1 3 octave resolution e FFT function High resolution Zoom FFT with selectable fre quency ranges and resolution up to 0 4 Hz in the range of 5 Hz to 20 kHz e 1 12 octave function High resolution RTA function 1 12 Oct Tol Selectable 1 1 1 3 1 6 and 1 12 octave spectral resolution Frequency band listening at rear speaker FFT and 1 12 octave function Capturing of multiple readings into the internal memory Comparing measurement results against cap tures with relative or absolute curve display Comprehensive tolerance handling with toler ance masks based on captures for passed failed measurements Export and import of tolerance and capture files Noise Curves Noise Rating NR in accordance with ISO 1996 Noise Criteria NC in accordance with ANSI 12 2 2008 and 1995 Room Noise Criteria RNC in accordance with ANSI 12 2 2008 Room Criteria RC in accordance with ANSI 12 2 1995 Preferred Noise Criteria in accordance with ASA 1971 Acoustic Analyzer FFT Analysis Reverbera tion Time RT60 Delay Time specifications Polarity e Real time FFT with actual level Leg Lmin Lmax e Level resolution 0 1 dB e Frequency Band Ranges 7 Hz 215 Hz 58 Hz 1 72 kHz 484 Hz 20 5 kHz with 143 fre quency bins shown on display e Measurement Units Volt dBu dBV and dBSPL e Optional H
10. AUDIO eee Ini LR Gl ast 17 06 S Large fluctuations HO CRITERIA 16 31 5 64 125He LPF imax beg aoe aed OB 13 LIHIT 1 0 5 0 LeFipwcLeeg 1 d 2 6 dE LIHIT 3 5 4 0 P RHC correction KLFC K125c Tao dE 4 dE The RNC information page is available at the noise curve types Noise Criteria and Room Noise Criteria in accordance with ANSI S12 2 2008 It reports any large fluctuations or surging at low frequencies e g caused by fans 110 Selection of the noise curve type and measurement re sult Noise Curve Types e Noise Rating NR e Noise Criteria NC 2008 and 1995 e Room Noise Criteria RNC e Room Criteria RC 1995 e Preferred Noise Criteria PNC 1971 Measurement Result The noise rating of a spectrum is designated as the value of the highest curve touched by the measured octave band spectrum The octave band in which this touching occurs is noted along with the curve designation Actual level result of the indicated frequency band The cur sor readout displays the center frequency and the level of the band pointed to by the arrow In the automatic cursor read out the arrow points directly to the frequency band with the highest noise rating as displayed in U e Auto Scroll e Zoom Select the YAxis with the rotary wheel amp and confirm with enter Select the zoom factor between 10 5 2 5 dB div and confirm with enter Real time spectrum in 1 1 octave band resolution
11. HANDHELD AUDIO AND ACOUSTIC ANALYZER Contact Nii Audio at Headquarter 423 239 6060 info nti audio com Americas 1 503 684 7050 americas nti audio com China 86 512 6802 0075 china nti audio com Czech 420 2209 99992 czech nti audio com Japan 81 3 3634 6110 japan nti audio com South Korea 82 2 6404 4978 korea nti audio com United Kingdom 44 1438 870632 uk nti audio com www nti audio com Net a NT Audio is an ISO 9001 2008 Q certified company Firmware V3 03 Version 3 03 00 5 May 2015 All information subject to change without notice All rights reserved Minirator is a registered trademark of NTi Audio TM XL2 XL2 TA EXEL M2230 M2230 WP M2211 M2215 M4260 and MA220 are trademarks of NTi Audio Made in Switzerland Table of Contents INTi AUDIO Table of Contents 1 Introduction soci Faicsicctencaindvecrdntcseidenadntendeatndssncdnnuieincacvsdsennt 5 5 Acoustic Analy Zer ccccccceceseeescseeeusueeeneueeeeeaeeenseeenaees 64 i FFT Analysis TOIGranCe ccccccccc cece neceeeeeeeeeeeeeeenns 64 2 Overview EA EO A A E E N OA A EEE A 7 Reverberation Time RT60 74 De OA E E NE T 9 A SFr DSO aadorssecs ccs icarnsecnccraedesesaomaseecceseen 11 Polarity O EEN E O E E 86 LS TAY NMAC pa cccspacet de cdutsmcdasttos vince E E E 90 3 Getting Started c cc cecccceceeeseeeeeaeeeesseeeseeeeessaeeessaaes 14 1 12 Octave Tolerance Optional cccecceeeeeeeees 96 Power
12. The standard STIPA signal is based on a band limited random noise of a male speech spectrum 117 INTi STIPA AUDIO STIFA FREER E i asb 15 47 g i FIHISHEC MMNIOMINNIONNININOONNIOININNOANUNTNANINININI 9 SUP TF LR E asp 15 47 a FIHISHEC IMnttiiH0ii 044000 10000100000010100011 ed4 A 3 2 STI 7 Band Leeq mri mr SHRGH2 Side 1 01 6 98 ee Rae z m a a 55 1dB iAGGH2 Tide 1 81 6 95 7 n SABH2 T7 1dB 1 01 1 04 4 s SCAH2 S6 9dB 1 84 1 02 125Hz S6 4dB 6 78 1 04 5 es Esclnit At Esclnit At 11 12 13 14 Use only the original NTi Audio test signal for speech intelligibility measurements with the XL2 Other signals may not seamlessly loop thus causing wrong measurement results ASD 19 41 S STIPH Avr LA E Averaging START NEH Cycle Reading 1 B 55ESTI fe ESA STI ae 6 OC ASESTI YF OB5st1v AOLOYA Ent AA STIPA 20 TIFA Cor LR E Ambient Hoise Correction Un Hoise to odd HEASURE aH S Lob SANE SOURCE OF DATA Default Settings Bod Bond L2eq EDIT SHAH Hz SHAR HZ HEB Hz LBBB Hz SHA HZ S Hz 125H2 LAeq YBN 1920 56 2 dE E 1 2 dE bre dE fi dE rd dE ped dE peed dE 2H 1 dE INTi 24 23 22 21 AUDIO 119 120 AUDIO This icon displays the run status of the measurement e Single value speech transmission index result e Repeatability of measurement result Since a dedicated nois
13. asp 13 24 S FOLDER MEH DIR Lae MyProject Start Append Mode File KENAWE SEARCH Mw Test _SLM_BBB E Automatic Humbering Auto Append is OFF CAHCEL LaFmax WcACHE ENFTY UHH a 7 HHEH 40 RHE t40 AGO Select the user part of the file name The maximum length of the user part is 12 characters The right part _SLM_001 is defined by the XL2 to avoid overwriting of existing measure ments whereby SLM is the appendix for the measure ment function and 001 is an automatically incrementing number Select START and confirm with enter e Measure the sound level LAeg on the first position e Select the memory menu and Append Data Lae SLMeter 1123 SLAE 7 ast 13 24 a LAF UJ JUD LAF max 1 ls 3 de TTT m SET D OD E 30 RAGE 230 lt H BEE FOLDER MeProject File hy Test _SLM_bbA_AeA Auto Append is OFF Exit Append FREE l rt 2 HE te In append mode the XL2 does not store e Log files e Wav files e Repeated report files generated in timer mode repeat and repeat synchronized Data Management INTi AUDIO e Select the location ID and measurement ID thus each mea surement result is stored with an individual description for later documentation e Select Append with the rotary wheel and confirm with enter SLMeter 123 KLA ET ast 13 24 a Append Data Li LocATI MN If REMAKE HEAS ID EDIT MvLocation Al CE LAF 46 6dB LAF max 39 Q de HUTT
14. put range For example at a microphone sensitivity of S 20 mV Pa the full scale peak level is Range Name Range Level Full scale peak level Lower range 10 110 dBSPL 117 8 dBSPL Middle range 30 130 dBSPL 135 9 dBSPL Upper range 50 150 dBSPL 159 9 dBSPL Select the lowest possible input range accord ing to the maximum level expected during the measurement e g If the sound pressure will always be below 110 dBSPL select the lowest input range 10 110 dBSPL The event function is available with the XL2 Extended Acoustic Pack Option The XL2 Analyzer may be configured to record wav files and additional noise levels only when triggered in stead of the complete measurement duration Reduces the data volume acquired thereby e Simplifying data post processing of the complete measure ment period e Saving data memory for long term measurement applica tions Events are triggered either automatically by sound levels above below a preset value or manually by external key press using the XL2 Input Keypad INTi AUDIO Sound Level Meter The XL2 event feature offers the following functionalities e Automated event triggered at noise levels above below a preset value including setting markers for specific noise cat egories Application example Recording the noise level for LAF gt 80 qB e Event triggered by external key press of the XL2 Input Key pad You can utilize four keys 1 4 to categorize any noise of int
15. 20 16 E 250 ik UVUNNUUAUIII 40 EHGe iuo e415 E 154 ASD 13 52 a iriz OCT 2 18HkH2 4k 16k Ae SET Ont GoGo PASSED The actual measurement result is within the tolerance band The actual measurement result is outside of the tolerance band Exceptions are visual ized in any out of tolerance frequency band Adjusts the tolerance bandwidth based on the captured ref erence spectrum in dB Provides a level offset in dB to move the tolerance band up down Capture Tolerances INTI AUDIO The XL2 Analyzer compares spectral measurements againsta Select the Capture amp Start Tolerance Mode symbol to exit tolerance band and visualizes exceptions 1 in every frequen from the tolerance mode cy band 112 Oct LA Asb 13 52 S Tees LA El asp 13 53 g Et S4 0dB 1 12 OCT Liwe 39 1 dE iri OCT Ref 16h Adet 2 188kH2 Ref 10 G adBt 258AkHz ma FASE 1 Ei IEHU I l ne 100 BO BO BO BO 40 40 20 m i amp 63 250 dk ks AZ i amp 63 250 dk ks AZ MT ae TH is E n r I TM SET 0 RHGE 2 COT Sa i 40 RHGE 140 T Ais E CAT mi l A T e Confirm with enter e Select Exit tolerance mode e Select the tolerance Ref with the rotary wheel Q Confirm with enter e Confirm with enter e Select the new tolerance file from the SD Card or the Internal XL2 memory 155 INTi AUDIO Capture Tolerances You may start the passed failed measurement by
16. 600 000 381 The XL2 Projector displays the XL2 screen in real time on your PC when connected by USB Free download at the XL2 Sup port Page http my nti audio com The precision calibrator is used to ensure accurate sound level measurements It generates 94 or 114 dBSPL reference tones 1kHz for calibration of 1 2 and 1 4 measurement microphones NTi Audio 600 000 390 Protect your M2230 microphone from wind rain and perching birds with this professional outdoor microphone protec tion kit Ideal for semi permanent unsu pervised outdoor installations Features e IEC 61672 class 1 ANSI 1 4 Type 1 e Compliant for 0 and 90 sound incidence e Non corrosive material e 3 8 Tripod Mount NTi Audio 600 040 060 Further Information INTi AUDIO This case is a simple and efficient solution for outdoor noise monitoring The XL2 is powered either by an external mains sup ply or using a small high capacity battery pack for a number of days monitoring NTi Audio 600 000 471 This case delivers a professional solu tion for medium term unattended noise monitoring Internal dimensions provide ample space for a sealed lead acid battery to power the XL2 Sound Level Meter for weeks continuously NTi Audio 600 000 470 The noise monitoring terminal is the ideal fixed installation enclosure for unattend ed noise monitoring The enclosure is IP66 rated highly secure and constructed of strong
17. approx 6 hours from PC Switch off the XL2 for faster charg ing Operation using Mains Power Supply You can also operate the XL2 with mains power using the NT Audio DC power supply unit During operation with this exter nal Mains Power Adapter it is recommended to leave the bat teries inside the instrument Mains Power Adapter Electrically isolated linear DC power supply Non NTi Audio power supplies may have neg ative effects on measurements e A decreased THD N performance will oc cur with unbalanced input signals when using switching type power supplies approx 3 dB Damage caused by using an inappropriate ex ternal DC supply is not covered by warranty DC Power supply specifications Voltage 75 20 0 Volt Power minimum 6 Watt Connector type 2 1 x 5 5 x 9 5 mm Polarity amp Getting Started INTI AUDIO e Open the battery cover at the rear of the instrument e Insert the rechargeable Li Po battery with the contacts edge first e Close the battery cover Switch off the XL2 for faster recharging by mains power adapter or USB connection Switch the XL2 off prior opening the battery cover in order to prevent any electronic dis charges Avoid short circults Operate and charge the battery between 0 C and 45 C 32 F 113 F Do not heat the battery above 60 C Do not place the battery in or near fire Do not solder directly on to the battery Do not disassemble t
18. asp 13 24 S Ef 7 06 tla Live YS AdE 69 719Hz JARAG lir LR ET ast 13 24 S T EQ 103 5 dE O limits 120 th Live 11 4dE 58 000Hz a iii 40 SB 00 Hz c 1 1kH3 1 12 kHz T SET 40 gaai Teds Eo ii opopog 40 58 00H2 21 TkHz 1 12 kHz TT SE 40 RHGE 140 T lz p TEHRI CAT wists 72 FFT Analysis Tolerance INTi AUDIO e Press stop Dal The Spectral Limits Option extends the function range of the XL2 with trace capturing relative curve display and compre hensive tolerance handling for the FFT Analysis and the high resolution 1 12 Oct Tol spectral analysis ast 1324 Features EQ 163 5dB S limit e Captures multiple traces in the internal memory tl Live 116 4tdE 55 600Hz e Comparing measurement results against captured traces a0 Test qutosaved as with relative or absolute curve display e Comprehensive tolerance handling Creating tolerance masks based on captured reference curves for passed failed measurements Record Voicenote Export and import of tolerance and capture files E O True peak level in 1 1 and 1 3 octave resolution 40 High resolution Zoom FFT up to 0 4 Hz steps in the frequen 58 00 H2 1 1kH2 1 12 kH2 cy range 5 Hz 20 kHz MINNI SET 40 RNG Ho Tele cnr gpegas 100 e gt MvProject E3 2615 61 22_FFT_ 648 Read the detailed description in the separate chapter Capture Tolerance e Press enter to confirm The measur
19. dE Difference ki G OdB ka Ode CLEAR ALL Ditference ki AdE ka amp B AdB mT SET ee 50 BHGE 150 BM oponi HTT SETO PODO SO HGE 150 E EEHEEHE 59 INTi AUDIO Sound Level Meter e Wait until the measurement is completed e The correction values k1 and k2 are calculated and displayed including date and time in accordance with DIN15905 60 SLMeter Kset LAR Gl ast 13 24 S Position LAegS LePeak Audience Run anii ia 09 13 24 eee dB 115 7 dE Measure Gil anii ia n9 ag ay PLEJE 126 7 dE Ditference ki 1 1dE ka 11 8 dE CLEAR ALL III E SET s0 AHGE 150 CHT oats You may fine tune the correction values k1 and k2 manually Such fine tuning adds the remark Manually Adjusted in the log Tile SLMeter Kset SLA Gl asp 13 24 a Position LAegS Li Pegk Audience Fun anii ia 09 ag ay ied 115 7 dE Measure EM anii ia n9 ag ay PLEJE 126 7 dE Difference bi 1B 1dB 8 5dB 3 1 CLEAR ALL HANUALLY ADJUSTED Une 9 IMM SET S0 AHGE 150 CHT oat ey e Turn the rotary wheel to select the correction value 3 and press enter Sound Level Meter INTi AUDIO e Set the correction value with the rotary wheel The note Manually Adjusted is displayed at e To undo the manual setting turn the rotary wheel amp s to select the parameter UNDO at C Confirm with enter Reset Correction Values You may clear all correction values back to zero
20. e g for sound level monitoring or automated measurement tasks The supported XL2 measurement functions are e Sound level meter and spectrum analyzer SLMeter RIA e FFT analyzer e Audio analyzer RMS THD N e High resolution spectral analyzer 1 12 Oct Tol x J 2 m pa E ua _ ao gt 1 sy A rar fra Yo i i a on Lo Vw CaF Ws 15 Re om The commands are send in ASCII format through the virtual COM port to the XL2 Audio and Acoustic Analyzer e Example command set send to XL2 Analyzer INIT START MEAS INIT MEAS SLM 123 LAF e Result returned to PC 53 8 dB OK For more details you may download the individual Remote Measurement Reference Manual at www nti audio com XL2 Order information NTi Audio 600 000 339 Microphones INTi AUDIO Certified Class 1 Outdoor measure General purpose Measurement Cost effective Microphone measurement ment microphone measurement microphone class 2 measure preamplifier microphone Class 1 in accor microphone for high sound lev ment microphone compatible with in accordance with dance with Class 1 frequency els up to 153 dB for common sound 1 2 pre polarized IEC 61672 IEC 61672 response Class 1 frequency level testing and capsules Metal diaphragm Metal diaphragm Metal diaphragm response service of audio Metal diaphragm acoustic installa tions 191 INTi AUDIO Microphones The plug on measurement microphones combined with the XL
21. hard wearing reinforced fiber glass NTi Audio 600 000 480 213 INTi 214 AUDIO GENERATOR way Sl iv 20 0 m i ocs 2V 2 F 3 mt Q NEWAVE u t 2 135 Mz A Further Information XL2 Data Explorer is a PC based software application with a powerful data proces sor for easy and fast analysis of sound lev el measurement data The data import re quires the Data Explorer Option installed on the XL2 Download the software at http my nti audio com The MR PRO is an extremely powerful analog audio generator designed for the professional engineer It generates the following analog audio signals e Sine Waveforms freely selectable fre quencies and levels up to 18 dBu e Sweep Signals any frequency interval up to 1 12 octave e White Noise Pink Noise e Polarity Test Signal e Delay Test Signal e Uploaded wav tiles wav NTi Audio 600 000 310 The NTi Audio TalkBox greatly simplifies the acoustic feed of the STIPA intelligibil ity test source signal into closed sound reinforcement systems It presents the Standardized voice like acoustic signal emission simulating a human talker in ac cordance with IEC 60268 16 combined with a certified speech intelligibility signal at standardized levels NTi Audio 600 000 085 Retractable lightweight tripod with 1 4 and 3 8 mounting thread It Is dedicated to mount the measurement microphones the outdoor microphone M2230 WP or th
22. 1 kHz e Flatness 0 1 dB 12 Hz to 21 3 kHz e Bandwidth 3 dB 5 Hz to 23 6 kHz e Resolution 3 digits dB scale 5 digits linear scale or 6 digits x1 scale Following measurement functions offer audio spec trum in Volt dBu and dBV e Sound Level Meter e FFT e 1 12 Octave optional Frequency THD N Total Har monic Distortion Noise Scope Filter Remote Measure ment optional e Range 9 Hz to 21 3 kHz e Resolution 6 digits e Accuracy lt 0 003 e Range 100 dB to O dB 0 001 to 100 e Minimum level gt 90 dBu e Fundamental frequency range 10 Hz to 21 3 kHz e Measurement bandwidth 2 Hz to 23 6 kHz e Resolution 3 digits dB scale or 4 digits linear scale e Residual THD N XLR RCA input lt 2 uV Auto ranging auto scaling e Frequency weighting A C Z e Highpass 100Hz 400 Hz 19 kHz e Bandpass 22 4 Hz 22 4 kHz in accordance with IEC468 4 Querying measurement data online via the USB interface of the following functions e Sound level meter and spectrum analyzer SLMeter RTA e FFT analyzer e Audio analyzer RMS THD N e High resolution spectral analyzer 1 12 Oct Tol Input Output Interfaces Audio Inputs Audio Outputs USB Inter face Digital I O TOSLINK Specifications e XLR balanced with input impedance 200 kOhm phantom power 48 V switchable automated sensor detection for NTi Audio s ASD measure ment microphones and pre ampl
23. 12 OCT Capture Et a r lie 115 Hz Manage captures 16 E 250 ik 4k 16k Z MAUN SET MMM SET o ANGE 40 ESS ME cntoa ag es o ANGE uo ESS ME cnroa a os e Select Capture EQ e Select C1 Confirm with enter Confirm with enter and set the capture name in the dis played letter selection box e g to Ref 150 Select the Capture amp Start Tolerance Mode symbol Confirm with enter Select Manage captures Confirm with enter Select Save to SD card Select the capture to be exported e g C1 Confirm with Save Edit the sound level data in the capture file You may delete any unused frequencies All remaining frequency data has to remain the same Any frequency changes will be discarded by the XL2 Load the new capture file with Manage captures back into the internal XL2 memory Capture Tolerances Blank the upper parameter by setting Select the lower parameter with the rotary wheel Confirm with enter Select Live and confirm with enter IHE as Li iE UUUUUIUII Select Live for displaying the relative difference Confirm with enter 40 pHGE i40 e415 E 31 S lz OCT Select reading mode h h DIFFERENCE thal Mik HAL CNT ot Select Ref and confirm with enter Set the Yaxis accordingly to show the zero line INTi AUDIO 151 INTi Capture Tolerances AUDIO e Select the Capture a
24. 23 S Scheduler active Current time 2611 11 29 4 73 45 Hext stort 2011 11 30 tie rego Press and hold ESC to quit After starting the scheduled measurement the XL2 waits for the next scheduled start date and time The instrument buttons are disabled It Is recommended that the instrument remains powered on until the next start time using the accessory mains power adapter If the XL2 is powered off and on again during this time then the XL2 Analyzer restarts in the Scheduler function and continues the countdown This applies also for any interruption of mains power supply Press and hold the start stop button bal to stop the scheduler prior start of the measurement or interrupt any ongoing sched uled measurement Starting the schedule switches the USB interface automatically into the COM port mode for remote measurement applications or using the XL2 Projector software system Settings INTi AUDIO 167 INTi Data Management AUDIO Add a new folder with an individual project name The maxi The XL2 stores all acquired measurement data including real mum length of the project name is 16 characters A fast time information onto the removable SD Card Additionally way for creating new folder names is wav files might be recorded and individual voice notes added e Select an existing folder name with DIR for a complete documentation of the measurement e Select NEW e Rename the folder and confirm with start Dal there
25. 4 0 IEC 60268 16 released in 2011 The XL2 Supports also noise corrections automated averaging of measurements and the older standard editions 2 0 and 3 0 The speech intelligibility depends on the following system pa rameters e Signal to noise ratio e Psychoacoustic masking effects e Sound pressure level e Ambient noise level e Reverberation time RI60 e Reflections e Frequency response e Distortion The speech intelligibility measurement function STIPA is an option for the XL2 Audio and Acoustic Analyzer Ask the local representative for purchasing details STIPA INTI AUDIO Utilize the applicable STIPA test signal source dedicated for your installation configuration NTi Audio TalkBox The NTi Audio TalkBox simulates a person talking at a precise acoustic level enabling the measure ment of the complete signal chain including the microphone e Place the NTi Audio TalkBox in front of the mi crophone at the typical position of the talking persons head e Select Track 1 for the STIPA test signal e Select Output Mode to Speaker you should hear the STIPA test signal Minirator MR PRO The Minirator MR PRO is used for electrical signal injection into public address systems that com monly use alarm messages from a hard drive systems without a microphone CD Player The NTi Audio CD STIPA V1 17 included in the package can be used with a professional CD player For details see the chapter STIPA Meat
26. C 0 C to 40 C 14 F to 122 F 82 F to 104 F 0 005 dB kPa 0 02 dB kPa 0 04 dB kPa lt 0 05 dB lt 0 4 dB 5 to 90 RH non condensing gt 250 years dB NTi Audio ASD in accordance with IEEE P1451 4 V1 0 Class 2 Template 27 100 Ohm balanced 48 VDC phantom power 3 mA typical Balanced 3 pole XLR 20 5 mm 0 8 36 mm 1 4 20 5 mm 0 8 154 mm 6 1 378 mm 14 9 150 mm 5 9 100 g 3 53 oz 430 g 15 17 oz 100 g 3 53 oz 33 g 2 93 oz IP51 IP54 in vertical IP51 position 600 040 050 600 040 055 600 040 022 600 040 045 600 040 025 Specifications INTI AUDIO Typical Frequency Response of Measurement Microphones M2230 M2211 M4260 M2210 M2215 8 T T Tolerance 6 Class 1 IEC61672 1 A 2 m L oh rr oO 2 eee ua t 0 LEE Se E z L Fo eet gt i 2 u C 0 a op a Tolerance Class 2 IEC61672 1 6 8 5 10 20 100 1000 10000 20000 log frequency Hz free field conditions reference direction 0 229 INTi Specifications AUDIO Linear Measurement Range XL2 M2230 24 dB A 138 dB acc IEC61672 ANSI 1 4 typ microphone sensitivity Level L 27 dB 7 dB 2 s 1 L 1 2 2 1 n r r ey 2 1 n 1 i 17 dB 27 dB Input Level XL2 M2211 29 dB A
27. DIN 15905 or SLV e Navigate the cursor to the backlight function e Toggle with enter to set this parameter Yes The instrument starts up with default application protiles Further details about the application pro files are in the chapter Profiles Dimming the backlight reduces the power consumption No The instrument starts up in the last configuration without any application profiles 162 You can select if the phantom power should be activated or disabled when the XL2 Is powered up Off The phantom power is switched off when the XL2 is powered up e g when it is common to measure lines Remember The XL2 remembers the setting prior to the last shutdown default setting Enables disables the rear speaker For example it is recom mended that the rear speaker be disabled for all acoustic measurements This prevents measuring the audio feed back sound loop generated through the rear speaker This defines how the PC recognizes the connected XL2 Ask on Select either the Mass storage or COM port connect mode after connecting the XL2 to the PC Mass The PC recognizes the XL2 as a mass storage storage device automatically allowing you to down load XL2 measurement reports system Settings INTi AUDIO COM port The PC recognizes the XL2 as a COM port au tomatically for application of the XL2 Projector and the Remote Measurement Option Set the decimal separator to match the generated mea surement r
28. Explosive atmospheres ATEX 94 9 EG e Directive 2011 65 EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment ROHS e Directive 2002 96 EC on waste electrical and electronic equipment WEEE Further Information This declaration will become invalid if modifications to the instrument are carried out without the written approval of NTi Audio Date 1 February 2013 IEC ffecho Position Technical Director 217 INTi Further Information AUDIO Information for Disposal and Recycling Dispose of the instrument in accordance with the legal environmental regulations in the country Regulations for the EU and other European countries with corresponding laws The instrument must not be disposed of in the household gar bage At the end of its service life bring the instrument to a collecting point for electrical recycling in accordance with the local legal regulations Other countries outside the EU Contact the respective authorities for the valid environmental regulations in the country 218 Sound Level Meter Product Con figurations Class 1 Type 1 Product Con figurations Class 2 Type 2 e XL2 TA M2230 microphone and ASD Cable forms an integrating sound level meter with type approval Class 1 in accordance with IEC 61672 Type 1 in accordance with ANSI 1 4 e XL2 with M2230 microphone Class 1 In accordance with IEC 61672 Type 1 in
29. LCpeak max at LCpeak k2 Appendix Averaged sound level over time with C frequency weighting Sound pressure level with C frequency weighting and peak time weighting Measures the peak level High peak levels can dam age the human hearing Maximum sound pressure level with C frequency weighting and peak time weighting Measures the peak level High peak levels can damage the human hearing Maximum peak sound pressure level with C frequency weighting of the preset logging interval in the LOG menu e g 1 second The actual measurement position often differs to the loudest posi tion of the live event Thus the correction value k2 is the correc tion value of LCpeak between the loudest position and the actual measurement position measured using pink noise The correc tion value k2 is measured or manually set in the page KSET of the sound level meter function INTi AUDIO 253 INTi AUDIO LEX 254 Appendix The Noise at Work Directive 2003 10 EC lays down minimum re AJ EQ quirements for the protection of workers from risks to their health and safety arising or likely to arise from exposure to noise and in particular the risk to hearing Steady noise Lex gh LAeg applies to LAS deviation lt 5 dB LAeg Measured over a short time equals LEX gh the following formula applies for a measurement period lt 8 hours Lex gh LAeq 10x log CT 7 8 hours Steady noise with stepped level variations Measure L
30. NTi Audio device after the 48 V microphone phantom power is activated Unbalanced audio signal input Internal microphone for recording voice notes and measur ing polarity and delay time For polarity measurements an external microphone may also be used Socket for mains power adapter Further details in the chap Mini B USB connection for accessing the SD Card Programmable digital inouts outputs 11 For storing data screenshots voice notes wav files 24 bit linear PCM audio signal output For future use not active at this time The XLR RCA input signals are routed to the headphone out put Connecting headphones mutes the internal speaker To connect the headphone output directly to a line input a load impedance lt 8 kOhm is required for proper operation This can be achieved by inserting a 1 kOhm resistance be tween tip and ground of the output jack The XLR RCA input signals are routed to the speaker Press the speaker button to toggle the speaker on off Press and hold the speaker button to access the volume control Set the speaker level with the rotary wheel Mechanical mount for attaching the XL2 to a tripod or mi crophone stand Overview INTI AUDIO 2 e Press the button briefly to enable or disable the speak er e Press and hold the speaker button AMS THO LA E 17 45 a a3 Eee E W EKSH TINS LYLAHS Fa F 2 3 4 Volume cad U UQUUUUNANAUUUAAANAT
31. The grey area shows the noise floor of the connected NTi Audio measurement microphone provided by the electron ic data sheet in combination with the XL2 Analyzer X Scale from 16 Hz to 8 kHz Noise Curves INTi AUDIO Select the LiveView with the rotary wheel to get an overview of the current noise level Alternatively press the limit button The XL2 measures the noise curve after pressing the start button Dal This will provide the noise rating measurement in accordance with all standards The run indication shows the measurement status running paused or stopped Various measurement settings are locked during ongoing measurements such as the preset measurement time 111 INTi Noise Curves AUDIO 9 11 Counts actual measurement time in hrs min sec Supports You may select any frequency to read out individual levels time modes continuous and single The selected frequency is indicated by the cursor arrow CiT Choose between the following settings applicable for standard measurements E All values are recorded and monitored continu The cursor follows automatically the frequency ously after starting a measurement with start Dal band with the highest noise rating The actual measurement time is shown e Select the frequency with the rotary wheel Press enter t i e You may readout any individual frequency Automatically stops the measurement after the e Return to auto frequency with enter pre set
32. UO ccert a Sec eE Ee E ai 14 Noise Curves OPTIONS vsecvssiiessucesincesicansiinnatdtvaudiansaess 107 Attaching the Hand Strap ccccccccceccccseccceeeeeesn scenes 17 Speech Intelligibility STIPA optional cee 117 eine TAO AN a ka 6 Audio Analyzer cccccceeeeceeeeeeeseeeeneeeeenseaeeseeseanenes 134 a e r a aaa ie RMS THD4N nn 134 Switching the XL2 Omand OTF wiseciecaentdactecessdocswasincieeaes 20 JSCo CONE aeae a a E eons hice 137 Select Measurement FUNCTION cccccseeecceeeeeeeae ees 20 Calibration prior Measurement cece eeeecccceeeeeeeee eens 21 7 Calibration saicnceetedccvedesssccannsi sina enseveduasncsejesuiancnesscsssactn 138 4 Sound Level Meter ccccccscceeeseseeeeeeseeeesesseeeeenes 22 8 PONS soiree cc acest rect sees ts tana ease ete eee eee 142 OVEIVIGW n se eneretten 26 9 Spectral Limits Option Capture ToleranceShesasi 149 Sound Level Meter Getting Started ee 34 RTA Measurement Getting Started 0 39 10 System SettiingGS cccccscessseeeeeeeeseeseeeeseeeeneeeeseeeees 161 FG OO NIMS E E nme nadeeteiens 44 S e E bee le as celta mcigeacuiadinneg eactaeeles gar taiceleaai te 161 OIA AEE E E EAA see nade asses A5 PTOI CO esmara aae EEEE EEE 164 Waw File RECOrding sessneirsosssiiinertiseiteerrannitisirseirr sni 47 Some oU ae a A NA ee ee 165 Eve mis AOD OMAN seieren en e ai 49 HW TN EEIEIE P EEEE A E E 56 COMECTION Value KSE tiseis sins
33. XL2 cccceccceceeeeeeeeeeeeeeeeeeeeeeeeeas 219 19 Technical Data Microphones c cccceceeeeeeeeeeeees 227 20 Technical Data PreAmppllifier cccssceeeeeeeeeees 235 APPONI se inspects es nee eee nee 236 Appendix 1 Standard Optional Features 236 Appendix 2 Factory Default Profiles ceeees 240 Appendix 3 Description Sound Levels ceeeees 245 Appendix 4 Common Sound Levels c0ccceeeeeees 249 Thank you for purchasing the XL2 Audio and Acoustic Analyzer The XL2 Analyzer forms the unique combination of a state of the art Sound Level Meter a comprehensive Acoustic Analyzer as well as a powerful Audio Analyzer The wide range of func tionalities is tailored for e Audio Acoustic Installations Installed Sound Life Safety Systems AV Installations Cinemas Noise Measurements Live Events Environmental Noise Occupational Health Vehicle Noise Live Sound Sound Level Monitoring Front of House PA Rental Broadcast Building Acoustics Industrial Quality Control and Aerospace INTi AUDIO Introduction The XL2 push buttons are displayed as icons esc Dm La Li 6 amp A detailed description of the push buttons is Menu items displayed on the XL2 page screens are shown in this user manual by a bold font e g SLMeter Parameter INTi AUDIO XL2 The following items are includ
34. arrives 5 ms later This im proves the subjective directionality percep tion of the listeners Distance in meter feet The distance results in meter feet are displayed below for easy verification of the test results accuracy The readings are based on 330 m s sound speed at 0 C 32 F 95 INTi AUDIO 1 12 Octave Tolerance The Spectral Limits Option extends the XL2 function range with an RTA analyzer with spectral resolutions from 1 1 octave down to 1 12th octave Trace capturing relative curve display and comprehensive tolerance handling are supported in the FFT Analysis and the high resolution 1 12 Oct Tol spectral analysis e High resolution RTA function 1 12 Oct Tol with select able 1 1 1 3 1 6 and 1 12 octave spectral resolution e Capturing of multiple readings into the internal memory e Comparing measurement results against captures with rela tive or absolute curve display e Comprehensive tolerance handling with tolerance masks based on captures for passed failled measurements e Export and import of tolerance and capture files e Frequency band listening at rear speaker 96 e PA rental Verifying the frequency response of returned speakers and microphones against reference records ensur ing they are back in stock In good working condition e Industrial quality testing Passed Failed test in the production line or during service of any audible quality criteria such as with motors machines va
35. be synchronized to the de lay test signal again Press the store button to record the actual delay 7 of the reference speaker Individually stored delay time of reference speaker 4 Calculated Distance Distance from measurement position to speaker in meters or feet based on the defined temperature in C or F Synchronization Time Bar The automated synchronization allows delay time measure ments without any connected electrical reference signal for 100 seconds using the NTi Audio Test CD or 300 seconds using the Minirator MR2 or MR PRO It displays the time remaining until the next required synchronization 6 Calculated Delay Time Store Actual Calculated difference between delay time of speaker A and speaker B as shown on the next page The automated dif ference calculation simplifies the verification of delay line arrangements such as those used in larger halls or audi toriums Actual Delay Actual measured delay time referring to the electrical refer ence signal Delay Time INTI AUDIO Delay Test utilizes VoiceNote Microphone The XL2 uses the internal VoiceNote micro phone to measure the acoustic delay Do not connect any measurement microphone to the XL2 for the delay time measurement Rear Speaker The rear speaker on the XL2 is disabled during delay measurements thereby avoiding mea surement failures The headphone output is ac tive 91 INTi AUDIO Delay Time The delay time
36. complete data sheet is recognized by the XL2 The automated sensor detection does not disturb any measure ments You may join up to 4x ASD Cables together in series The ASD technology supports accurate data communication up to a combined cable length of 20 meters 65 feet INTi AUDIO Microphones For distances longer than 20 meter 65 feet use a high qual ity low capacitance standard professional audio cable The mi crophone sensitivity has to be entered manually into the XL2 Analyzer Alternatively connect the microphone first directly to the Ana lyzer The XL2 reads the sensitivity and remembers this value Afterwards connect the audio cable e Use the microphone for the intended purpose only e Protect the microphone from contamination by always using the supplied windscreen e Never use the microphone in a damp or wet environment e Do not jar or drop the microphone e Do not remove the microphone protective grid e Do not touch the microphone membrane e Remove the black dust cap of the 1 2 measurement microphones prior to use 193 INTI Microphones AUDIO The M2230 WP is a weatherprotected microphone solution for the XL2 Sound Level Meter allowing acquisition of environ mental noise data in outdoor applications The corrosion free polymer housing wind screen waterrepellent membrane and bird spike provide excellent protection from rain wind dust and perching birds The frequency response of
37. display either the levels Live e Connect the measurement microphone to the XL2 Max Min EQ or captured results Switch on the XL2 e Select the upper result parameter with the rotary wheel B FFT Toll ikr LA E 4 asp 13 24 S TS E e Position the XL2 at the measurement location using a micro t Live So Tdek 2 175 19Hz phone stand or tripod hi 100 aO BO 40 SH O0Hz 1 7kH2 1 12 kH2 UUUNNUUNUTINT SET a0 ANGE 130 T 815 MO cnr pppgog e Confirm with enter 70 FFT Analysis Tolerance INTi AUDIO e Select the integrated averaged reading EQ All available se FFI lections are Z weighted no weighting _ EQ a Lit 4B UNIAN NN s0 GHG iso eos E e Select EQ for normal absolute display of measurements e Follow the same instruction and select the lower FFT read ing Live e Confirm with enter Press start D to measure and display the sound levels results indicated with 71 INTi FFT Analysis Tolerance AUDIO e Select the lowest possible input range according to the maxi The XL2 measures the selected sound pressure lev mum level expected during the measurement els Live and EQ All available sound levels are e Select the input range RNGE and press enter Z weighted no weighting e Turn the rotary wheel amp to set the applicable input range and Press start gt m confirm with enter FFT Tollikr LA Gl lt
38. exceed the RC curve corresponding to a sound level spec trum by more than 5 dB and the spectrum levels in Band 1000 Hz and higher do not exceed the corresponding RC curve by more than 3 dB Rumble R Excessive noise in low frequency band The level in one or more of the octave bands at and below 500 Hz exceeds the RC curve corresponding to a spectrum by more than 5 dB Hiss H Excessive noise in high frequency bands The level in one or more of the octave bands at and above 1000 Hz exceeds the RC curve corresponding to a spectrum by more than 3 dB Vibration and rattle RV The level in one or more of the oc tave bands from 16 Hz through 63 Hz exceed the criterion for moderately noticeable rattle in accordance with ASA 1971 PNC curves represent a more stringent method based on an extension of the basic Noise Criteria system They have been used in the past to judge the acceptability of ventilation and other background broadband noise PNC curves are less often used than Noise Criteria curves because they are more strin gent at lower frequencies than the Noise Criteria curves but also because the latest 2008 version of Noise Criteria curves also includes an extended frequency range somewhat mitigat ing the original reasons for PNC Noise Curves 1 H z2A0S 32 SHA Hz D le 3d Bo F 3 50 6 15 125 1K Live Leu E HOLD LIHIT KEY Tee LA Gl as 15 05 g Os E INTi AUDIO 109 INTi Noise Curves
39. in 20 76 Displays the actual measurement status Start and stop the reverberation time measurement with start stop ba The following status information is displayed ARMED Measurement is waiting for the test signal to exceed at least one measurement trigger marker then the measurement is triggered automatically NOISE A sound stimulus signal above the trigger marker is being received DECAY Decay is being measured PAUSE he measurement has been paused by press ing pause Lv STOP No RT60 measurement is presently being per formed Counts the measurement cycles When using an interrupt ed noise test signal a minimum of 3 sequential cycles is recommended Reverberation Time RI60 INTi AUDIO The black bars indicate the actual signal including back ground noise While setting up the reverberation time mea surement you should increase the test signal level until the black bars exceed the grey bars completely and the status 4 displays NOISE The grey bars indicate the signal level required for effective reverberation time measurements in each octave band The marker has a length of 35 dB and can be set by e Selecting SET 1 with the rotary wheel O e Press enter to measure the environmental noise in the silent room Indicates a successful reverberation time measurement above each octave band with a tick lt Select between the measurement methods T20 and T30 T20 requires just a small dy
40. includes the recording of Compressed AGC wav tiles This profile is configured with the following limits which trigger the lights on the limit button and external Digital O Adapter This facilitates a quick response to sound levels that exceed these limits Meet Lim eLA Gl ast 15 28 g Limit LED On LAeg5 k1 Red gt 100 0 dE Orange 96 0 d breen 2 96 0 dE Ir Box On STAT 23 LAego tkl LAegg tkl Out 1 gt IBR BdB and 100 0 dE Out 2 gt SE BdE ond 2160 0 d Out 3 2 9R 68dB ond amp 596 0dE Out 4 EWAdE ond 6 dE You may import the log files into a report generator soft ware based on MS Excel providing automatically completed live event reports with noise level charts The report genera tor software is a free download on the support website at http my nti audio com for all registered XL2 customers Capt Applicable for most common sound pressure level measurements compensating for human hearing perception at lower sound pressure levels Applicable for very high sound pressure levels compensating for human hearing perception at high sound pressure levels typically used for mea surements of peak values e g LCpeak This selection offers the reference curve which has been previously stored with Capture in the spec trum analyzer of the SLMeter function Application example e Comparing the performance of the left and right Speakers in a live event sound setup Appendix
41. measurement is conducted between the syn chronized electrical input signal and the acoustic signal mea sured by the built in voice note microphone In this example the delay between speakers A and B in the illustrated audito rium is measured speaker front right x speaker A front left 2 lecturer ee a a a a a EE E n N ee ee PE a a a a a E a a a a a a EE E n N measurement C O O O O o o o og o Posion Be a a a a ee speaker sub right Y speaker B sub left 7 92 Prepare the delay test signal use either the e NTi Audio Test CD e NTi Audio Minirator for analog systems e NTi Audio Digirator for digital or Dolby DTS systems Start the delay test signal Connect the generated delay test signal with an audio cable to the RCA or XLR input of the XL2 e g take the reference signal from an auxiliary channel of a mixing console Select XLR or RCA input in the upper XL2 menu Set the actual environment temperature to ensure that the distance is displayed correctly later 13 45 S Del 5i l PP an alas Winirater Act Delo TORE E ee re re ms AAmes Act TTT TT7 ms Distance ZAP i oo o0 Synchronizing 05 00 e Wait until the XL2 synchronizes to the incoming delay test signal then the synchronization time bar fills up Delay Signal n a Mainirater Act Delo STORE Ms 4 13 45 i Delay Time INTi AUDIO e Start the delay test signal at so
42. measurement unit as follows dB dBu dBV Sound level in dBSPL This measurement unit is permanently selected upon connecting a NTi Audio measurement mi crophone with electronic data sheet Input level in dBu Input level in dBV Input level in Volt 101 aNTi AUDI 102 1 12 Octave Tolerance The selected frequency band of the input sig nal is audible at the rear soeaker or headphone output e Press and hold the speaker button down The pop up window Volume is displayed e Keep the speaker button pressed and press enter at the same time iri Oct LA Bi ast izz S Max dE iriz OCT a Live CA2dB 12 26Hz r Volume 4 HdB UQUUUNANUUUAANUUTHI B0 OdE 80 Soe Bondpass ib E 250 liilli 40 pHGE ido TAs E The XL2 reads the electronic data sheet of any connected ASD microphones provided by NTi Audio and switches the 48V phantom power automatically on as follows e Connect the measurement microphone to the XL2 e Switch on the XL2 e Position the XL2 at the measurement location using a micro phone stand or tripod e Select the 1 12 Oct Tol function in the measurement menu The displayed wideband and spectral levels are measured and stored simultaneously 1 12 Octave Tolerance INTi AUDIO The XL2 displays two different sound pressure levels at the same time You configure to display either the levels Live Max Min EQ or captured results e Select th
43. menu INTi Getting Started AUDIO e Navigate with the rotary wheel amp to the main menu bar e Confirm with enter to select the measurement function Press power to switch on the XL2 SLMeter RTA a Press power amp and hold it down for one second to switch oft iflz Oct Tol g the XL2 Holse Curves pena tet inema Meter et B2 3dB rofile System Setting 69 0 qE UT SET 30 RAGE 130 Bent aceon Main menu with enabled options e Scroll up down with the rotary wheel amp to select the re quired function and confirm with enter 20 Setting the Parameters with the Rotary Wheel e Turn the rotary wheel to navigate within the display screen The selected parameter is highlighted with a black back ground e Confirm with enter The parameter display flashes and or available parameters or settings are shown e Turn the rotary wheel amp to set the parameter or toggle with enter through the settings e Confirm with enter Now the parameter is set INTi AUDIO Getting Started Calibration prior Measurement We recommend the daily calibration of the XL2 Analyzer with the precision calibrator This ensures accurate measurement results 21 INTi Sound Level Meter AUDIO The XL2 provides together with the measurement micro phone a precise sound level meter for monitoring live sound events and or environmental noise Th
44. on as follows e Set the acoustic sound pressure level of the PA system to simulate the typical announcement level e g LAS 85 dB Connect the measurement microphone to the XL2 Switch on the XL2 STIFA FRERIRRNI A i asb 15 47 S STOFFED ed4 4 es e Position the XL2 at the measurement location using a micro i TI phone stand or tripod e Select the STIPA measurement function in the measure ment menu ie dB e Prepare the environment for the measurement For example Las 5 0dB mute all sound sources to establish silence Bad PoorFoirGood an No impulsive noise shall occur during the speech intelligibility measurement as well no speaking or other noise sources should be al lowed near the measurement microphone 124 STIPA INTI AUDIO e Press start Dal After the period of 15 seconds the speech intelligibility mea surement finishes automatically The progress bar indications switches to FINISHED and the final test result is displayed The measurement result is stored automatically e Switch off the STIPA test signal STIFA REQIRRNI A i asb 15 47 g FIHISHEC WIILIOIIIIONIIIIIIIIIIIIITIIIIIIIOI IITTI STIFA 1i lLA E Reuse g RUHHIHE IILIIIIIONIIIOIIIIIIIIITIIT TOTTI 0 87 si 0 8751 Test agutosaved as CS MvProject E3 2615 61 22_STIFA_6A1 LAeq 35 1 dB Las 2R 0dB 7 Record Yoicenote e Press enter to confirm The measurement data are stored on the SD Card in AS
45. one of the following possibilities e Press the XL2 start button bal e Activate the automated level trigger in the tolerance file e Activate the digital input 1 via the external I O interface e g a foot switch or a PLC control Result Passed Output 1 Result Failed Output 3 Start Measurement Input 1 156 Tolerance curves can either be imported from txt files or direct ly derived from captured measurements The XL2 calculates tolerance bands based on e Single captured results e Manually generated txt files on the PC e Mean average of multiple captures e Min Max curves of multiple captures Capture a spectrum on the XL2 Analyzer Enter the tolerance mode and generate a tolerance band for the capture Select the Capture amp Start Tolerance Mode symbol Confirm with enter Select Save tol to SD Card to export the capture tolerance file This file includes the reference capture and the tolerance data The XL2 generates a txt file in the folder Tolerances e Open the capture tolerance file with a text editor or MS Ex cel Edit the tolerance data according your requirements You may delete any unused frequencies All remaining frequency data has to remain the same Any frequency changes will be discarded by the XL2 e Store your individual tolerance file as txt file in the XL2 folder Tolerances e Start the XL2 tolerance mode and load the new tolerance file from the SD Card e All entries in the
46. the highest NC curve touched by the measured octave band spectrum The designating number for any NC curve is ap proximately its speech interference level SIL the average of the levels in the 500 1000 2000 and 4000 Hz octave bands The XL2 Analyzer includes any tangency method adaptation as applicable 107 INTi Noise Curves AUDIO in accordance with ANSI S12 2 2008 The RNC method is used to determine noise ratings when the noise from HVAC systems at low frequencies is high and which is also suspected of containing sizeable fluctuations or surging It essentially represents a rumble criterion The RNC curves also provide a procedure that reduces the result essen tially back to the NC curves when systems are well designed and acoustically well behaved Following the RNC specification the XL2 measures the octave band sound pressure level every 100 ms followed by processing to determine the applicable room noise criterion RNC curve The minimum measurement time is 20 seconds 108 in accordance with ANSI S 12 2 1995 The RC criterion curves are a system for use in the design of heating ventilating and airconditioning HVAC systems in office buildings dwelling units etc where the desired mid frequency levels are in the range of 25 to 50 dB Each RC crite rion curve bears a rating number equal to the level at 1000 Hz Spectrum classification e Neutral spectrum N The levels at 500 Hz and below do not
47. the instrument to the XL2 TA the sound level meter dedicated to certified measure ments The XL2 TA with the M2230 microphone forms a type approved sound level meter offering class 1 performance in accordance with IEC61672 and type 1 in accordance with ANSI 1 4 The Type Approval Option includes e XL2 TA Firmware V2 71 approved Firmware e Sticker XL2 TA e XL2 TA Manual available online at www nti audio com XL2 How do get my XL2 TA ready for accreditation e Install the Type Approval Option on the XL2 and apply the XL2 TA sticker on top of the XL2 label on the display e Download the dedicated firmware for accreditation from the XL2 Support Page of http my nti audio com to your XL2 sound level meter e After the firmware installation the XL2 TA starts with a pop up window XL2 Type Approved SLM RTA The sound lev el meter functions SLM RTA are now certified to meet the Class 1 sound level meter requirements The XL2 indicates this function as SLM TA or SLM RTA Type Approved 206 NTi Audio 600 000 430 The Data Explorer Option enables the import of logged sound level data into the XL2 Data Explorer software a PC based software application with a powerful data processor for easy and fast analysis of noise monitoring data Visualize analyze and control millions of data points with this tool that is dedicated to acoustic consultants and noise mea surement professionals It provides a convenient way to
48. view and manage your data and quickly create customized reports Features of the XL2 Data Explorer software e Data visualization e Fast zoom and pan e Audio playback synchronized to graph e Markers with on the fly calculations e Calculates sum of frequency bands e Visualization of recorded events e Customized Reporting NTi Audio 600 000 379 The Cinema Meter Option forms the dedicated solution for efficient calibration and repetitive verification of cinema loudspeaker systems according SMPTE ST 202 2010 and SMPTE RP 200 2012 An interactive assistant guides the user through dedicated measurement procedures Cinema Meter SsTEFOO ast 13 31 S Select a task to start a Create new cinema Calibrate cinema Verity cinema a Lock into Verify Mode View verification results Exit INTi AUDIO Further Information e Create new cinema Generates measurement templates according the cinema size with dedicated X curve selection e Calibrate cinema Calibration menu for reference data recording of each chan nel as well as headroom tests and averaging measurement results of different microphone positions e Verify Cinema Verification menu for periodical cinema measurements and comparison against the reference data e Lock into Verify Mode Locks the XL2 Analyzer in the Verify Cinema mode After powering off the instruments starts up directly in the Verity Mode again The user may unlock the instrument any
49. 0 1dB LEFE o1 4dB ay et aticri 40 ANGE 130 CHT GO Oooo The run indication 1 shows the pause symbol You may continue with the measurements di rectly e g choose the measurement function setup parameters and press start Dal Data Management INTi AUDIO The append mode stores the results of several individual mea surements into the same data Tile thus simplifying measure ment result analysis and data handling on the PC The following measurement functions support the append mode e SLMeter sound level meter e STIPA speech intelligibility measurement Application example The sound level LAeg shall be measured at various locations in the same venue hall using a pink noise test signal The append mode allows to store all individual measurement results into one single data file Backup the stored measurement data from the XL2 to the PC daily This prevents any data loss if data has been deleted from the SD Card by mistake 181 INTi e Select SLMeter and preselect the sound level LAeg e Select the memory menu with the rotary wheel AUDIO Data Management confirm with enter e Select Start Append Mode and confirm with enter 182 SL Heter 123 4 LAL Gl lt ast 13 24 S LAF max PUUNUAUAUONUNUNL 30 RHGE 14 HomingtSoving manoal Save Test Save Screenshot Logd Test 3323 Sarai FREE HRITE CACHE EHFTY EE onc co coco eo and SL Heter 123 4LAL El
50. 1 12 OCT ae Live 47 3dE 2 T2 kHz aO 40 ib E 250 ik ik SET M0 puce Tals P Pe lri Cnt RR ee pe levels are 1 12 Octave Tolerance e Press stop Dal Pakaa oSLA OG ast 14 30 2 Ef Tl 2dB 1 12 OCT ae Live UPde 2 reAkHz Test gutosoved as CS MyProject E3 2615 61 22_120CT_AAB 7 Record Voicenote 1b E 250 ik 4k TT M0 puce Tals P CHT 00 00 INTi AUDIO e Press enter to confirm The measurement data are stored on the SD Card in ASCII format 105 aNTi 1 12 Octave Tolerance AUDI The Spectral Limits Option extends the function range of the XL2 with trace capturing relative curve display and compre hensive tolerance handling for the FFT Analysis and the high resolution 1 12 Oct Tol spectral analysis Features e Capturing of multiple readings into the internal memory e Comparing measurement results against captures with rela tive or absolute curve display e Comprehensive tolerance handling e Creating tolerance masks based on captures for passed failed measurements e Export and import of tolerance and capture files e True peak level in 1 1 and 1 3 octave resolution e High resolution Zoom FFT up to 0 4 Hz steps in the frequen cy range 5 Hz 20 kHz Read the detailed description in the separate chapter 106 The Spectral Limits Option extends the XL2 with the Noise Curves measurement function A noise curve may be used to characterize ro
51. 110 dBSPL then select the lowest input range 10 110 dBSPL Offers selectable time weighting of 0 1 0 2 0 5 1 0 second as well FAST 125 ms and SLOW 1 second Applications Short Time High resolution in time with minimum Weighting averaging Long Time Low resolution in time with longer aver Weighting aging 1 12 Octave Tolerance INTi AUDIO The run indication shows the measurement status running paused or stopped Various measurement settings are locked during ongoing measurements such as changing the Input ranging or the preset measurement time For passed failed measurements with the Spectral Limits option the run indication may display A for a preset auto mated level trigger Counts actual measurement time in hrs min sec Supports setting of time modes continuous and single Clit applicable for standard measurements All values are recorded and monitored continu ously after starting a measurement with start Dal The actual measurement time is shown Automatically stops the measurement after the pre set measurement time e Set the required measurement time e Start the measurement gt E 99 INTI 1 12 Octave Tolerance AUDI 9 11 Adjustment of preset measurement time for single timer You may select any frequency to read out individual levels setting The selected frequency is indicated by the cursor arrow 10 Bre Choose between the following settings Userselectable display of broadband re
52. 144 dB XL2 M4260 35 dB A 144 dB Level taval 41dB L 49 dB r XL2 4 31dB M2211 39 dB XL2 i L M4260 Ideal 21dB 29 dB a no a ee ene On S ne ee OO eee ee Se CO oe ee ee E 21 dB 31 dB 41dB Input Level 29 dB 39 dB 49 dB Input Level 230 If a measurement microphone is held in a free field environ ment then the measurement microphone acts at high fre quencies like a reflector The sound pressure increases in front of the microphone capsule membrane M2230 M2211 and M2215 are free field equalized measurement microphones they compensate for the increased pressure internally The calibrator offers no longer free field conditions Therefore the free field equalization of the microphone must be compen sated This needs to be considered prior the calibration The correction value needs to be added to the pressure response of the microphone Example e During the calibration the XL2 measures the sound level in the calibrator If the B amp K4226 calibrator is used and it is set to 16 kHz then the XL2 M2230 reads just 86 7 dBA e The free field sound level is calculated by summing the XL2 measurement value and the correction value 86 7 dB 73 dB 94 0 dB INTi AUDIO Specifications The following corrections apply with the B amp K4226 calibrator Nominal M2230 M2211 M2215 Measurement Fre Measurement Measurement Measurement Uncertainty U quency Microphone Microphone Microphone dB
53. 2 Analyzer form a comprehensive sound level meter and acoustic analyzer The microphones are 48 VDC phantom pow ered and include an electronic data sheet The microphone bodies contain a preamplifier and require 48 VDC phantom power supply for operation They combine high dynamic range and wide frequency range with low noise The measurement microphones can also be connected to the XL2 Audio and Acoustic Analyzer using an ASD Cable for mea surements at remote locations or for reduction of acoustic re flections 192 The microphones include an electronic data sheet The Auto mated Sensor Detection ASD of the XL2 Analyzer automati cally reads this data i e the microphone model and calibration data This promotes faster setup and ensures accurate mea surements Screen connection used for ASD technology Microphone XLR M l Pin a Microphone Pin 3 Capsule Pin 1 Shield 1 Connection diagram of measurement microphones with electronic data sheet The XL2 automatically reads the electronic data sheet of the connected microphone as follows e Connect the measurement microphone to the XL2 e Switch on the XL2 The NTi Audio measurement microphones can be connected to the XL2 Analyzer using an ASD Cable for measurements at remote locations or for reducing acoustic reflections The elec tronic data sheet is transmitted via the XLR connector s hous ing Do not touch this during the brief initialization period to ensure the
54. 23 S Ambient Holse Correction WARRHS E1 2dE Back on the actual project select the parameter Load with MEASURE SOS SRGBH2 BT 2dB the rotary wheel amp and press enter E F Select the reference noise file which shall be utilized as LOAD SANE oe 2SAH2 amp 2 90B ambient noise correction for your speech intelligibility lesHz 82 906 measurements SOURCE OF DATA Lieq 98 10 Default Settings Edit actual noise data m Select the parameter Edit or the LAeq level with the ro tary wheel amp and press enter Turn the rotary wheel to adjust the noise level Press enter to continue the setting Bod You may adjust the ambient noise band levels and the LAeg Skip the next step Measure Ambient Noise and go to STI Measurement 129 INTi AUDIO e Position the microphone at the STIPA measurement point STIPA e Select Measure without any test signal presence 130 STIFA Cor SLR E Ambient Hoise Correction Un Holse to odd HEASURE 30s UUUUQUUOUONUUNUTEUUEAUEAUINUTI Lihi SANE SOURCE OF DATA Bond L2eq EDIT SHAH Hz YABB Hz HEB LAeq Measured 2615 81 71 Bod ASD 19 25 qi cA dE 59 5 dE E A dE 52 1 dE be dE B42 dE 62 0 dE bo dE 13 25 You may edit the noise data e Select the STIPA result page 123 e Perform the speech intelligibility measurement STIFA PEE ASD 16 46 FIHISHEC UIIIIIIIIIIIIIIIIIIIIINII TT
55. 25 U 3 7 3 8 Volt Level indication 0 U lt 3 7 Volt The battery is almost empty and must be recharged 48V The XL2 provides 48 V phantom power supply to the connection microphone or sensor The battery is being recharged by the mains power adapter or the USB connection to PC GH WE ASD An NTi Audio measurement microphone with automated sensor detection ASD is connect ed The XL2 reads the electronic data sheet of the microphone and switches the 48V phan Using standard AA batteries tom power automatically on No level indication as long as U gt 4 5 Volt Level indication 0 U lt 4 5 Volt The batteries Phantom power is switched off are almost empty and should be replaced The real time clock is set in the System menu Using mains or supply No indication of battery status INTi AUDIO Getting Started 3 Getting Started Power Supply The XL2 offers flexible power management options and can be operated either by e Replaceable rechargeable lithium polymer Li Po battery included with the XL2 Analyzer e 4x AA batteries e Mains Power Adapter The new battery is charged to approximately 50 and should be fully charged before use with Battery Charger optional Charging Time approx 3 hours NTi Audio 600 000 332 Mains Power Charging Time approx 6 hours Adapter Leave the battery inside and switch off optional the XL2 for charging NTi Audio 600 000 333 USB Power Charging Time
56. 3 55 e Frequency weighting C Level range Leq Lpeak LOW 3 16 MID 17 30 HIGH 41 55 e Frequency weighting Z Level range Leq Lpeak LOW 7 20 MID 21 34 HIGH 46 58 Measure ments Real Time Analyzer RTA Specifications e SPL actual Leg Lmin Lmax LCpeak Remote e Gliding LAeg with selectable time window from Measure five seconds to one hour ment e All measurement results simultaneously available optional e Correction value measurement wizard e Noise exposure level LEX with post processing e Logging all data or subsets in selectable intervals e Recording of wav files ADPCM a new wav tile Bata starts every 12 hours max wav file size 512 MB Explorer e Recording of voice notes optional e Monitoring of sound levels that exceed limits e Digital I O interface for external peripherals control e 1 1 octave band display 8 Hz 16 kHz sub ranges 8 Hz 4 kHz or 31 5 Hz 16 kHz displayed with A Z broadband levels at one glance e 1 3 octave band display 6 3 Hz 20 kHz sub ranges 6 3 Hz 8 kHz or 20 Hz 20 kHz displayed with A Z broadband levels at one glance e evel resolution 0 1 dB e Measurement Units Volt dBu dBV and dBSPL e Band pass filters base 2 conform with IEC 61260 2014 class 1 amp ANSI 1 11 2004 type 1 for the frequency bands 16 Hz and above e Wide band levels simultaneously e Frequency weighting X Curve in accordance with ISO 2969 e Capturing of a single reading into t
57. 88 9 dB This correction is not necessary using a diffuse field equalized measurement microphone 232 Nominal M2230 Frequency Microphone Hz dB 50 0 0 63 0 0 80 0 0 100 0 0 125 0 0 160 0 0 200 0 0 250 0 0 315 0 0 400 0 0 500 0 0 630 0 0 800 0 1 1000 0 1 1250 0 1 1600 0 2 2000 0 4 2500 0 5 3150 0 5 4000 1 1 5000 1 7 6300 1 9 8000 2 6 10000 3 3 12500 4 8 16000 6 1 20000 8 9 Specifications INT AUDIO M2230 Frequency Response for Free Field Diffuse Field and Pressure Idealized Free Field 1 aL n T S A T y A T FRA o Tt tt ST SSS SAN ap rt T A S SNNN ae TT i e ot HN sh A T A A sL tT A oe Titty e ot Tt titty C e od i tii PT titi PE 10 20 1 sensitivity relative dB O oO 1000 10000 20000 log frequency Hz 233 INTi AUDIO Specifications The outdoor microphone M2230 WP fulfills IEC 61672 Class 1 as well as the ANSI 1 4 Type 1 requirements for vertical sound incidence For compliance with horizontal sound incidence a spectral correction is employed in the associated XL2 Sound Level Meter Colibrte LA dd asp 15 03 S Spectral Correction MPSA Sensi Off Cdefoults We leather protection HF36 Community Chorizontal Weather protection HFS Aircraft vertical ASO Dota HTi Audio P4e2bR SHo BZA e Factors Sens User Sens 2h esr Fd VAP User 234
58. AFmax Sound Level Meter INTi AUDIO e Select the lowest possible input range according to the maxi mum level expected during the measurement Wrong Input ranges are indicated by a lt in front of the measurement val ue or a flashing OVR message in the lower menu bar e Select the input range RNGE and press enter e Turn the rotary wheel amp to set the applicable input range and confirm with enter The numeric result page and the real time ana lyzer page use the same input range 37 INTi Sound Level Meter AUDIO e The XL2 is ready to measure the sound levels Lar Lagg and Press stop m LAFmax e Press start m SLHeter 123 LA E lt Asb 15 25 S LAF me Test autozawed gs Melee es LAR OG ast 13 24 g E gt MeProject E3 2415 61 22_5LM_ 81 SF Record Voicenote R LAF LA 4 dB man z LAF max ho oe dB MMIII GET LAeq 44 6 qE 30 PHGE 130 E EITO OD ae LaF max 61 8dB TILIL SET il RHGE 1140 p ITEA DD e Press enter to confirm The measurement data are stored on the SD Card in ASCII format 38 The XL2 stores all data and audio onto the SD card for direct transfer to the computer Audio data is stored as wav files Data reports and log files are stored in plain text format which can be opened with any text editor Notepad Wordpad etc The data is tab delimited so dropping the txt file into a spreadsheet application will conveniently show th
59. Acoustic Pack with zoom function Spectral Limits with zoom function Spectral Limits Capture and Tolerance functionality Extended Acoustic Pack 1 3 octave band results Spectral Limits 1 12 Oct Tol Capture and Tolerance functionality Spectral Limits Option STIPA Option with STIPA functionality Querying measurement data online via the USB interface Standard Features Appendix INT AUDIO Optional Remote Measurement Option supporting e Sound level meter and spectrum analyzer SLMeter RIA e FFT analyzer e Audio analyzer RMS THD N e High resolution spectral analyzer 1 12 Oct Tol 239 INTI Appendix AUDIO You may start up the XL2 with individual preset application pro files The following limits apply at all areas accessible by the visitors during the measurement period of 30 minutes e Maximum averaged level 99 dB The XL2 displays this maximum level with the measure ment result LAeg k1 e Maximum peak level LCpeak 135 dB OTHISS65 5 amp Audio wl Meee et LRAD 9 ast 15 36 S 5LY IBGE k SLY IBGE amp Audio k Laeggtki 93 9aB Leg 92 7 dB LoPEmax ke 1 1 0 dB i lll SET OO 30 00 The profile Full mode is the default configuration with all avail SO PHGE 150 p RERET able measurement functions enabled 240 Appendix INT AUDIO These levels are shown in the numeric result page Laegs tk1 Time averaged sound pressure level Lagg Select the page
60. Aeq at the different levels and enter the data with the corresponding exposure time In the NTi Audio noise expo sure level post processing form the Ley gp will be calculated and displayed Varying noise levels Lex sh LAeg Measured for 8 hours The exposure limit values and respective actions are Action Lower limit value 80 dB A 135 daB The employer shall make individual hearing protectors available to workers A Upper limit value 85 dB A 137 dB Hearing protectors shall be used Exposure limit 87 dB A 140 dB The attenuation characteristics of the hearing protectors worn must adequately reduce the levels below this limit Appendix INTI AUDIO 255 GLO 4P OOSL
61. CII format 125 AUDIO The standard IEC 60268 16 recommends averaging two or three subsequent results taken at the same measurement lo cation The German Standard VDE 0833 4 requires performing mini mum three subsequent measurements for one measurement position in case of STI lt 0 63 The XL2 Analyzer offers automated averaging of two up to eight speech intelligibility results based on these standard re quirements 126 e Select the averaging page Avr STI PA_ Avr LR ES Averaging Ga Cycle Reading ASD 15 47 S i g Bod e Turn the rotary wheel to select the parameter START NEW and press enter STIPA uNTi e Press enter to confirm Add Cycle e Choose Finish to end the averaging STIFA Awre LR Bl asp 15 45 S STIFA Awe LAR Bl asp 15 47 S Averaging Averaging Cycle Reading Cycle Reading l OSSESTI M Add Cycle Repeat last Repeat last 3 B SH STI A 0 SbBsT s AOLOYA O 86stry A00U0L zz m pint AA Ent AA e Repeat the measurement at the same position as required INTi STEA AUDIO The symbol indicates that the averaged STI value is dis Measuring the speech intelligibility index under realistic envi played ronmental conditions is often not feasible e g playing the test signal in a railway station at emergency levels during peak hours will irritate passengers Additionally at rush hour the charac SP LA A i aso 15 47 teristi
62. Data Management 10 INTi AUDIO A low Write Cache level indicates a good perform ing SD Card The optional Extended Acoustic Pack with simultaneous 100ms logging and linear wav file recording result in a high data volume written onto the SD Card Some non original SD Cards may cause OVLD performance thus loose some measurement data Verify the Write Cache of your SD Card during your measurements Subsequently an original SD Card shall be used We recommend SD Cards of the manufacturers SanDisk and Transcend Original SD Cards ensure that all measurement data and audio wav files are stored in good or der on the SD Card Non original SD Cards may lead to low performance or error messages In case the SD Card is full you can insert the original spare SD Card into the XL2 and contin ue with the measurements The XL2 generates the projects and system folders automatically 169 INTi Data Management AUDIO Mame l am e Select the Log page in the sound level meter function and Pautorun in set the logging parameters e g as follows 1 Projects 2 amp xl2 htm 3 C L2_S 5 SLMeter MEEDE EEE Logging On Interval dt OPDELE The folder Projects contains subfolders with the stored Add Spectra Ho measurement results The default subfolder name is Log Audio On MyProject You can create further individual subfolders Format Compressed AGC Log Vioglues Selected ae 0 LAE a ece This file opens the XL2 Instr
63. E SET cree 40 RAGE 130 HG ooo 183 INTi Data Management AUDIO Move to the next location in the room carry out the mea You can continue to add measurement results into the same surement and follow the described append data procedure data Tile at any time later e Store the measurements in the append mode and switch the XL2 off and on again e Open the memory menu LBL e Select Exit Append after adding the last measurement Alternatively the XL2 can append measurement data to the same report file automatically Continue append Continue append on file e Start the Append mode and set Auto Append HvTest_SLM_aee 7 is ON in the memory menu or in the pop up O YES oO window Start Append Mode ne If you select SKIP in the Append Data window Initializing then no measurement data is appended to the report file e Select Yes and continue adding measurement results to the same report file in the append mode 184 Data Management Any previously stored measurement with the remark for ap pend can be recalled and further test records appended e Select Load Test and press enter e Select the project folder and stored data file name Select LOAD confirm with enter SLMeter 123 LAR E lt ast 13 24 S LAeq Load for Append ES HyTest SLH_AH is stored in append mode B Continue LAF max A4 dE mn SET Ong to 30 RHGE 130 Al pyano e Select Continue and add further measur
64. Hz dB dB dB 31 5 0 0 0 0 0 0 0 3 63 0 0 0 0 0 0 0 3 125 0 0 0 0 0 0 0 3 250 0 0 0 0 0 0 0 3 500 0 0 0 1 0 0 0 3 1000 0 0 0 1 0 0 0 3 2000 0 3 0 6 0 2 0 3 4000 0 7 1 7 1 2 0 3 3000 2 6 4 2 3 9 0 4 12500 6 0 73 6 7 0 7 16000 73 9 2 9 0 0 8 Correction values for other calibrators for M2230 Toe Correction Calibration Calibration Value Frequency Level NTi Audio CAL200 0 1 1 kHz 114 dB B amp K 4231 0 2 1 kHz 114 dB Norsonic Nor 1251 0 2 1 kHz 114 dB 231 INTi Specifications AUDIO A diffuse sound field is characterized that the sound arrives at the receiver from all directions with more or less equal prob ability The M2230 is a free field equalized measurement mi crophone The default frequency response refers to a 0 sound incidence The diffuse field frequency response is calculated by averaging the M2230 directional characteristics this results in a reduction at the high frequencies The individual third octave band correction values for diffuse field conditions are docu mented in the following table The directional response of the M2230 is described in the appendix Example e The sound pressure level in a diffuse sound field shall be de termined The display of the XL2 with the M2230 reads 80 0 dBA for the 20 kHz third octave band e The diffuse sound level is now calculated from the sum of the XL2 measurement value and the correction value 80 0 dB 8 9 dB
65. I O Sound Level 1 The I O level 1 may be combined with I O level 2 using and or combinations providing indications in level ranges Alternatively other lev els can be selected for the control of the external Digital I O Adapter Box Follow the setting for LED Level 1 Sound Level Meter INTi AUDIO If triggered event recording is enabled the digi tal output 4 OUTA4 is utilized as confirmation feedback to the XL2 Input Keypad thus the set ting is disabled 57 INTi Sound Level Meter AUDIO The correction value page offers a measurement wizard for live event monitoring applicable in case the measurement location differs from the loudest position in the live event area The goal at live event monitoring is to measure the sound level at the loudest position accessible by the audience Setting up any sound level measurement at this loudest location Is typi cally not practical thus an alternative measurement position Is chosen The recommended measurement position in order to minimize the influence that audience noise has on the mea surement e Mount the measurement microphone in front of the main Speakers e Position the XL2 Analyzer at front of house FOH e Connect the XL2 Analyzer and measurement microphone using a professional audio cable eeann Positioning the measurement microphone at front of house FOH may result in audience N J noise interfering with the measurement results The audi
66. If Log Audio 5 is set to Events Only then the duration for the audio recording may be further specified Records a wav file for the whole trig gered event duration Recording whole event Records a wav file for the specified period after the event start is trig gered Stop recording after Displays current trigger status e Waiting for trigger e Armed during start duration 13 e Audio data recording e Completing log cycle Measurement result of the defined level 4 Counts the number of triggered events that have occurred during the ongoing measurement Sound Level Meter INTi AUDIO Answers the question What caused the triggered event Event recording by pressing a button at the external input key pad with automated or manual stop of the event Lvi Event automatically triggered by level 100 Event Duration Event Duration lt gt lt gt 1 Event triggered or marker added by pressing key 1 of the XL2 Input Keypad ce O N CO O O Level dB key press S 2 Event triggered or marker added by pressing key 2 of the XL2 Input Keypad 3 Event triggered or marker added by pressing key 3 of the XL2 Input Keypad 15 A 15 60 lt gt ok gt 4 Event triggered or marker added by pressing key 4 K of the XL2 Input Keypad E nE 12 See 3 Features 13 e The levels LAeg LZeq and LCPeak are recorded for the event see 2 duration e Audio data may be recorded for the user defin
67. Individual frequency weighting time weighting actual minimum maximum and correction values can be chosen for each displayed result 8 SLheter 12a LA E i aso 13 24 g 88 7dB Leg 70 6dB 2 LeFeak 4 A dE MAMAMAN po Tor 3 a0 HGE 150 Cir ec 6 4 5 26 The real time analyzer page RTA measures and displays the 1 3 or 1 1 octave spectrum from 6 3 Hz to 20 kHz including wideband results The real time spectrum RTA is measured in parallel with the A and Z weighted wideband levels 17 JANGGA TEES 5 LFF ox 5oeb dE 173 OCT 16 ta LEFljve 38 2dE 2HBH2 15 10 nd 11 BD _ gt _ aoii Eis e 2 12 20 14 im fi 13 a0 BO 250 ik Yk 20k Az TTT p SET 10 ANGE 110 CAT tones a All sound levels are measured and logged simultaneously You select which sound levels should be displayed e Turn the rotary wheel amp s to select the parameter Lxx e Press enter to open the selection menu and choose the wideband sound pressure level to be displayed e Turn the rotary wheel amp s to select the required test result parameters and confirm with enter e Turn the rotary wheel amp s to select the actual test result e Press enter 1x 2x or 3x to set the font size to small medium or large The XL2 shows 3 sound levels on the display if a large font is chosen otherwise it shows 5 sound levels Follow the setting instructions for sound level result 1 To display sound level resu
68. KSET with the rotary wheel amp with correction value k1 and a moving time Measure the correction values kT and k2 as described in the window of 5 seconds chapter Sound Level Meter Correction Value KSET Press the start button Dal The icon LOG flashes during the ongoing measurement In the case where the profile DIN15905 5 amp Audio has been selected the icon AUD flashes indicating the additional au dio wav tile logging During the measurement you can monitor the actual sound level LAegs tk in order to remain below the permitted lim The following sound levels are displayed in the real time ana its alternatively you may monitor the spectrum analyzer for lyzer page tracing possible feedback frequencies Press stop ba to finish the measurement LAegtk1 Time averaged sound pressure level LAeq with correction value k1 LCpeaktk2 C weighted peak level LCpeak with correc tion value k2 L7Fhold3 For tracing of feedback frequencies The peak hold time is set to 3 seconds L7Flive Actual real time spectra In accordance with DIN15905 5 all sound lev els are measured displayed and logged to the SD Card automatically The settings are locked which ensures that the correct parameters are measured The profile DIN15905 5 amp Audio includes the recording of Compressed AGC wav files 241 INT Appendix AUDIO This profile is configured with the following limits which trigger the lights on the limit button and ex
69. N 0 82 st Measured 0 987 LAeq 43 7 dB las 73 9 dE In case no ambient noise correction has been carried out on site with the XL2 Analyzer then you may post process your measurement data on the PC The NTi Audio STIPA Reporting Tool combines the STIPA measurement taken at quiet condi tions and the actual ambient noise caused by the public e g during day time This emulates the expected speech intelligibil ity at real life conditions The STIPA Reporting Tool creates measurement reports ac cording to the IEC 60268 16 and VDE0833 standards Import the data directly from your XL2 including the ambient noise measurements The corresponding speech intelligibility STI or CIS values are shown The STIPA Reporting Tool is free to download on the XL2 Sup port website http my nti audio com for all registered users Enable all macros when opening the document system Requirements e PC running Windows XP or Windows 7 e Excel 2007 or Excel 2010 32 bit or 64 bit versions STIPA INTI AUDIO e The ambient noise has to be sufficiently static during the measurement A signal noise ratio of 15 dB or higher is rec ommended to achieve best speech intelligibility Impulsive ambient noise during the measurement such as speech causes severe measurement errors The STIPA result is usu ally too high e Fluctuating noise is detected by measuring the direct STI in the absence of the test signal Carry out these measur
70. Noise Curves INTi AUDIO 118 INTi Noise Curves AUDIO Type of Room Recom Equivalent RC curve Space Type mended Sound NC and Level RNC Curve Concert halls 15 18 Small auditoriums 25 30 35 39 Large auditoriums 20 25 30 35 Broadcast studios 15 25 16 35 Drama theaters 20 25 30 35 Private residences 25 40 35 48 25 30 N Schools 25 35 35 40 25 40 N Hotels 25 50 35 57 25 45 N Offices 25 40 35 48 25 35 N 114 Type of Room Space Type Conference rooms Hospitals and clinics Movie theaters Churches Courtrooms Libraries Restaurants Light maintenance shop Shops and garages Recom mended NC and RNC Curve 25 35 25 45 30 40 30 35 30 35 30 35 40 45 45 55 50 60 Equivalent Sound Level 35 44 35 52 39 48 39 44 39 44 44 48 48 52 52 62 57 67 RC curve 25 35 N 25 40 N 25 35 N 25 35 N 30 40 N The XL2 reads the electronic data sheet of any connected ASD microphones provided by NTi Audio and switches the 48V phantom power automatically on as follows e Connect the measurement microphone to the XL2 e Switch on the XL2 e Select the Noise Curves function in the measurement menu The microphone should be moved slowly to po sitions around the entire space at locations that are near the average normal standing or seated height of human ears The recommended pe riod is 20 seconds or longer Noise Curves INTi AUDIO e Select the noi
71. O Application Setting The sound exposure level LAF Is the LAeq normalized to 1 sec AJ E ond The sound exposure level is measured to compare noise events with different time durations The LAE reports the amount of noise from an event such as an individual aircraft fly over LAE LAeq 10 x log time in seconds Averaged sound level over time with A frequency weighting Level of the preset logging interval in the LOG menu e g Log ging Interval 1 second then LAeq_dt is the time averaged level of the past 1 second 249 INTi AUDIO LAeq k1 LAeqxx 250 Appendix The actual measurement position often differs to the loudest posi tion of the live event Thus the correction value k1 is the correc tion value of LAeg between the loudest position and the actual measurement position measured using pink noise The correc tion value k1 is measured or manually set in the page KSET of the sound level meter function Measurement of the moving sound level over time Leq with A weighting frequency and F weighting time responses the param eter xx is userdefined from five seconds up to one hour Four individual levels can be configured e g e 5 seconds for live sound monitoring e 10 minutes in accordance with the French standard e 15 minutes in accordance with the British standard e 60 minutes in accordance with SLV LAeq60 1 LAFmax LAFmax dt LAFmin Appendix The actual measurement position o
72. O Connect another XL2 to the PC and generate a folder called Profiles on the SD Card Copy the profile called MyProfile into the folder Profiles Start up the XL2 select Profile in the main menu and press enter Select Manage and press enter Select Import from SD Card and press enter If the profile is exported from an XL2 Analyzer with activated options to another XL2 Analyzer without options then these options have to be hidden prior to storing the profile for export e n the exporting XL2 system menu select the individual option and toggle with enter to Hidden e Store the profile in the XL2 Analyzer 147 INTi Profiles AUDIO The XL2 can store up to 20 individual profiles in the internal secured Secured profiles are locked user profiles with system memory and offers three different profile types profiles overwrite protection indicated by the Tile name ending in xxx prfs This file name cannot be Types Description overwritten Sample filename MyProfile prfs Factory The XL2 includes factory default profiles which default are marked with in the beginning of the file How to generate secured profiles profiles name Sample filename DIN15905 5 prfs e Export the profiles to SD Card according to the procedure in the chapter Profile Getting The factory default profiles are a free Started download for all registered XL2 cus e Connect the XL2 to the PC tomers on the support website at e Se
73. O e Select the parameter SET with the rotary wheel and Protect the ears against high sound pressure levels as the press enter test signals might be very loud Setting the pink noise level e Start the pink noise test signal with the appropriate on off time according to the room Use an initial low level e Increase the test signal level until all level markers for the RTEA RUH LA BS ast 13 24 S minimum test signal level are passed Use an equalizer to lauei Markers 123 OCT push individual band levels o T28 e Switch off the interrupted pink noise signal after you have ae finished setting the pink noise level 120 O g0 TT LA A i aso 13 24 S 1 3 OCT SET Level Markers T A 40 120 63 125 250 S00 ik ek HII g AYRG 88 A 30 RHGE 130 STAT STOP 63 125 250 S00 ik eck UUUUNUNAUTAUTNII AWRG 8S W RAGE 130 STAT STOP Liu 82 e Press start Pl The status indication switches to ARMED e Enable the test signal e g switch on the interrupted pink noise signal or fire a starter pistol e The black bars have to exceed the grey bars completely RTBA TRUK LA E 4 Asb 13 24 S z 1 3 OCT Level Markers Toh ee ee ee 120 go BO TNT TTT 63 125 250 S00 ik ck Yk Bk HII p AYRO 1 30 RHGE 130 STAT ARMED Reverberation Time RT60 INTi AUDIO Using pink noise The interrupted pink noise test signal continues with the pre set on off time The XL2 automatically trig
74. RTA parameter displayed as line timer mode start exactly on the half or full hour in accordance with DIN 15905 ils Lower RTA parameter displayed as bargraph Adjustment of preset measurement time for single and re peat timer setting 29 INTi Sound Level Meter AUDIO e Capture One of the displayed RTA readings may be captured Any measurement data can then be compared with this cap tured reference live on the XL2 Analyzer For example compare the RTA spectrum of the left and right speak ers e Select the parameter to be captured e Confirm with enter to capture the reading e Select the upper RIA parameter 15 and choose Capt Confirm with enter 10 Actual level result of the indicated frequency band The cur sor readout displays the center frequency and the level of the band pointed to by the arrow Upper parameter displayed as line uu Lower parameter displayed as bargraph 30 e Select the YAxis with the rotary wheel and confirm with enter e Select the zoom factor between 20 10 5 2 5 dB div and confirm with enter e Scroll up and down with the rotary wheel amp s to select the Y axis range Confirm with enter Real time analyzer results in 1 1 octave or 1 3 octave band resolution Adjust the resolution at 7 Toggles X scale range between 20 Hz 20 kHz RTA levels including wide band results 6 3 Hz 8 kHz RTA levels including wide band results 6 3 Hz 20 kHz RTA levels e S
75. SI 12 2 1995 e Preferred Noise Criteria in accordance with ASA 1971 e Application range of measurement microphones M2230 down to NC15 M2211 down to NC15 M4260 down to NC27 e Actual level Leg Lmin Lmax e Selectable 1 1 1 3 1 6 and 1 12 octave spectral resolution e Measurement Units Volt dBu dBV and dBSPL e Capturing of multiple readings into the internal memory e Comparing measurement results against captures with relative or absolute curve display e Comprehensive tolerance handling e Creating tolerance masks based on captures for passed failed measurements 223 INTi AUDIO Cinema Meter optional STIPA Speech Intelligibility optional Specifications e Measurements in 1 3 octave resolution according SMPTE ST 202 2010 and SMPTE RP 200 2012 e An interactive assistant guides the user through dedicated measurement procedures e Single value STI and CIS test result in accordance with IEC 60268 16 ISO 7240 16 ISO 7240 19 DIN VDE 0828 1 DIN VDE 0833 4 e Ambient noise correction e Automated averaging of measurements e Modulation indices and individual band level re sults with error indicator e Test signal NTi Audio STIPA signal generated by the MR PRO NTi Audio TalkBox or the STIPA Test CD Audio Analyzer Level RMS Real Time Analyzer RTA 224 e True RMS detection in V dBu dBV and dBSPL e Range XLR RCA input 2 uV 25 V 112 dBu to 30 dBu e Accuracy 0 5
76. accordance with ANSI 1 4 e XL2 with M2211 M2215 microphone Class 1 frequency response in accordance with IEC 61672 Type 1 frequency response in accordance with ANSI 1 4 These specifications apply for operation with the microphone detached using the ASD cable This prevents possible acoustic reflections from the XL2 housing and ensures a high measurement accuracy in accordance with the standards IEC 61672 and ANSI 1 4 e XL2 with M4260 microphone Class 2 in accordance with IEC 61672 Type 2 in accordance with ANSI 1 4 Specifications Conforms with Stan dards Details Weighting Measure ment Ranges with different microphones Linear Mea surement Range acc IEC61672 ANSI 1 4 INTi AUDIO e IEC 61672 IEC 60651 IEC 60804 IEC 61260 ISO 2969 e China GB T 3785 2010 GB T 3241 GB 3096 2008 GB 50526 GB T_4959 1995 e Germany DIN 15905 5 DIN 45645 2 optional DIN 45645 1 e Japan JIS C1509 1 2005 JIS C 1513 class 1 JIS C 1514 class 0 e Switzerland SLV e UK BS6698 BS5969 e US ANSI 1 4 ANSI S1 43 ANSI 1 11 2004 class 1 e International IEC standards are adopted as European standards and the letters IEC are replaced by EN XL2 conforms to these EN standards e Measurement bandwidth 3dB 4 4 Hz 23 6 kHz e Level resolution 0 1 dB e Internal noise 1 3 uV A Weighted e Frequency weighting A C Z simultaneous e Time weighting Fast Slow optional Impulse simultan
77. ange green lamp Meet Lim eLA Ge ast 14 58 a 1 Limit LED On 2 LAegs tkl aa 8 Red gt 99 0 dE 3 Orange 35 0 dE gt Green SS AdB 4 I 0 Box On STAT 23 5 Laeghttkl LAeg5 ki 7 Out 1 gt 99 6dB and gt 595 0dE 6 Out 2 So HdB ond 39 0 dE gt ut3 95 0dE and 95 0dB Qut4 8d and AdB 56 Select Limit LED with the rotary wheel amp s and press enter to enable disable the limit function Select one sound level for the limit LED indication e Select the sound level field with the rotary wheel e Press enter and select the sound level for the limit LED indication To set the level values for the limit LED E e Select the Red or Orange sound level with the rotary wheel 3 and press enter e Set the level value with the rotary wheel amp and confirm with enter Select I O Box with the rotary wheel amp 3 and press enter to enable disable the limit function Setup the level for the control of e g the external Digital I O Adapter Box e Select the level field with the rotary wheel e Press enter and select the level for the control of the external Digital I O Adapter Box To set the level values for the control of the external Digital I O Box e Select the Out 1 Out 2 Out 3 or Out 4 level with the ro tary wheel amp 3 and press enter e Set the level value with the rotary wheel amp and confirm with enter Follow the setting for
78. ard System Settings INTI AUDIO e Hold down escape and turn the rotary wheel amp until the desired contrast is reached 2 Toggles with the page button between Set System setting Inf System information Sch Scheduler Cor Freq Correction If no button has been pressed for the defined time period then the instrument switches off The auto power off mode is disabled when a measurement is running or when an external mains power supply is used e Select Auto power off with the rotary wheel Q Confirm with enter e Set the auto power off time with the rotary wheel Confirm with enter 161 INTi System Settings AUDIO 4 5 Toggle the backlight with the power backlight button The XL2 includes a real time clock All measurements are The backlight offers three different conditions logged with a date and time stamp e On e Dimmed Set the real time clock as follows e Off e Select the Date function 5 with the rotary wheel e Confirm with enter e Set the date with the rotary wheel Auto On Off The backlight switches off if no key is e Confirm each setting with enter pressed for 2 minutes e Follow the same procedure for Time Auto The backlight dims if no key is pressed On Dimmed for 2 minutes 6 Manual The backlight can be toggled between You may configure the XL2 to start up with individual preset On Dimmed and Off application profiles For example sound level monitoring in accordance with
79. as road traffic or community noise as sessments For example LAFxx Is the noise level exceeded during xx of the measurement period e g LAF90 is the noise level exceeded during 90 of the measurement period Please see the specitications at chapter Technical Time constant t 1 second the time weighting Is an exponential function of time which defines how changes of the instantaneous sound pressure level are averaged for useful sound level results Clock Impulse Maximum Level Taktmaximalpegel LAFT3 In accordance with DIN 45645 1 Maximum sound pressure level measured with fre quency weighting A and time weighting F within a time interval of 3 seconds 247 INTi AUDIO Appendix Te Time average Clock lmpulse Maximum Level 248 Taktmaximalpegel LAFT3eq in accordance with DIN 45645 1 Clock Impulse Maximum Level Taktmaximalpegel LAFT5 In accordance with DIN 45645 1 Maximum sound pressure level measured with fre quency weighting A and time weighting F within a time interval of 5 seconds Time average Clock lmpulse Maximum Level Taktmaximalpegel LAFT5eq In accordance with DIN 45645 1 In the film and recording industry an X curve is also known as a wide range curve e g used for cinema installations conforms to ISO 2969 z Overall sound pressure level all sound signal com ponents are included required for special applica tions Display LAE LAeq L Aeq dt Appendix INTI AUDI
80. audible click You have successfully assembled the M2230 WP Outdoor Measurement Microphone g 197 INTI Microphones AUDIO e Gently remove the top section The design of the M2230 VWP Outdoor Measurement Micro phone supports easy calibration of the microphone To cali brate follow the procedure below e The top section of the M2230 WP is snapped on to the body tube Remove the top section of the M2230 WP by gently pulling the bird spike upwards At the same time gently push up on the cage inside the wind screen with two fingers of your other hand You will feel when the snap mechanism is released The snap mechanism works only at tempera tures above 15 C 5 F as the O Ring stiffens In colder conditions we suggest you warm up the housing first e g with your hands 198 Microphones INTi AUDIO e Calibrate the microphone as described in the XL2 user man ual using the NTi Audio Precision Calibrator e Snap the top section back into position on the body tube 199 INTi Further Information AUDIO Register your instruments at My NTi Audio and benefit from the following possibilities e Open the web page http my nti audio com e You are prompted to login or create your My NTi Audio e Free updates for your instruments account e Activation of optional product functions e The web page My NTi Audio Products opens e Premium access to downloads e Select the product type and enter the s
81. ay vary based on the mounted microphone capsule type 235 INTi AUDIO Sound Level Meter Frequency Weighting Sound Level Meter Time weighting Sound Level Meter Correction 236 Appendix Standard Features AIEI FIS Optional e Extended Acoustic Pack I Impulse E Sound Exposure Level Percentile Sound Pressure Levels for wide band 1 1 and 1 3 octave spectrum with flexible setting from 0 1 to 99 9 Appendix INT AUDIO Standard Features Optional Sound Level Meter Liste inar min Prev e Extended Acoustic Pack Parameter liwe Prev Clock Impulse Maximum Level Taktmaximalpegel in ac cordance with DIN 45645 1 Calculated levels in accordance with DIN 45645 1 LAFTSeq Lheg Laleq LAeg Lteg LAeq Sound Level Meter e Extended Acoustic Pack or Spectral Limits Option RTA Spectrum Analyzer PK True peak level PK Sound Level Meter e Recording of wav tiles e Extended Acoustic Pack Audio Recording ADPCM compression Recording of wav tiles 24 bit 48 kHz e Voice note recording Sound Level Meter Triggered Event Recording e Extended Acoustic Pack 237 INTi AUDIO Sound Level Meter Logging FFT Analysis Measurement Range FFT Tol Capture and Tolerance RT60 1 12 Oct Tol Noise Curves STIPA 238 Appendix Standard Features not available function not available function not available function not available Optional 100 ms logging Extended
82. belt clip the XL2 can be kept close by for those tasks requiring both hands The Everready Pouch allows oper ation of the XL2 while fitted in the pouch NTi Audio 600 000 335 Mains Power Adapter the XL2 Audio and Acoustic Analyzer with removable plug types The Mains Power Adapter suits the typical power sockets in Australia China Europe Japan US and UK NTi Audio 600 000 333 Rechargeable spare battery for portable measurements at any time NTi Audio 600 000 337 Connects to the XL2 and generates ICP power supply for alternative microphones or sensors Specifications sensor sensitivity 50 mV Pa and out put impedance lt 100 Ohm e Residual Noise Floor typical 17 dB A e Maximum SPL 140 dB NTi Audio 600 010 223 ICP is a registered trademark of PCB Piezotronics The ASD Cable allows for extended con nections of the NTi Audio measurement microphones It supports the transfer of the electronic data sheet from the micro phone to the XL2 Analyzer NTi Audio 5 meter 16 feet 600 000 336 10 meter 32 feet 600 000 364 20 meter 64 feet 600 000 365 The ASD technology for the electronic data sheet transfer is applicable for cable length until 20 meter 64 feet This compact system case provides the professional transport protection for work in the field It offers space for the hand held instruments cables and connectors NTi Audio 600 000 334 Further Information
83. by e Carry out a sound level measurement creating a new folder name e Select the memory menu in the upper menu bar e Press enter The memory menu opens 2 An overview of all existing project folders is shown Select YL a folder to store the results of the measurements 3 FOLDER MEH DIR All measurements are stored in this project folder MvProject Homing Saving manoal 4 Se pest Setting of auto or manual data Tile naming and saving Save Screenshot Logd Test COLLECT RESULTS In OnE FILE auto The results are named and stored automati Lae cally in the selected project folder Fl 33230 HEYTE FREE noe eee eae oa manual The question mark shows up in the upper menu bar upon the completed measure ment You can choose to individually name and store each single measurement LULLUN gt SET il PHGE 140 CHT 00 00 30 168 Stores the measurement in the selected project folder Stores the XL2 screen in the selected project folder Loads back previously stored result data from the SD Card for detailed examination on the instrument screen The append mode stores one or more results into the same data Tile simplifying data analysis and handling on the PC Application example The speech intelligibility shall be measured at various lo cations In the same venue The append mode allows you to store all individual measurement results into one single data file Displays the remaining available memory on the SD Card
84. by pressing the Clear All O and confirm with enter W Display k1 and k2 during Measurement The correction values k1 and k2 can be dis played in the numeric result page during the on going sound level measurement instead of any other sound levels Wav file Recording A simultaneously recorded wav file supports post event reviewing of the cause of excessive sound levels 61 INTi AUDIO Sound Level Meter The Locked Run Mode simplifies sound level monitoring You just need to power up the XL2 and the measurement starts automatically The measurement continues until you switch off the Instrument using the power button The measurement data are stored by default e Set the required parameters in the sound level meter for your noise monitoring application e Press and hold the start stop button gt m for 3 seconds e Switch off the instrument e Switch on the instrument 62 e The page button allows toggling between the sound lev el meter and real time analyzer window All other buttons are deactivated during Locked Run Mode SLMeter ASD 17 10 S LAF Info Locked Run Mode enabled To disable press and hold FM key LA IE LEFKE nb 1 dE SET CHT GoGo III 20 RHGE 120 Lg e Press and hold the start stop button gt m for 3 seconds during the ongoing measurement Sound Level Meter INTi AUDIO 63 INTi AUDIO FFT Analysis Tolerance Besides the comprehensive sound le
85. choic for example a large empty room with painted plaster walls and a tiled floor may have such an acoustic character Level dB A WAWAN A an 5AB 20 dB level range to obtain the reverbera distance to tion time noise floor se ma annals Dome eae h A r WA k se YMA RT60 Measurement with T20 method ETEB RUH LA ast 13 24 n 1 3 OCT Level Markers Toh 120 g0 63 125 250 500 ik eck Ilill AYRG Ae 30 RHGE 130 E STAT STOP Reverberation Time RI60 ATEB RES LAE ASD 13 24 S Uncert SADa coe AYRO RT6Actao LABS 125H2 E3 i25 250 500 ik k 4k Bk illl AVAG AS 70 PHGE 130 STAT STOP INTi AUDIO 79 INTi Reverberation Time RI60 AUDIO Prior to conducting a reverberation time measurement the environmental noise is measured and the required energy level of the test signal is determined e Select SET and press enter to measure the actual en RTEA RES SLA BS ase 13 24 S vironmental noise Correlat 1007 if Hl DEL 22 a REA ctAo 1 11s 125H2 2 0 SS om 5 mim z 21 2 X ea Select between the lower mid and upper input range The exact ranges depend on the microphone sensitivity setting fi il ill in the calibration menu of the XL2 lull Ba deS PANAN Ak Ek This icon displays the running and stop status of the rever Ilill AVAG BS J30 FHGE 130 E TAT STOR beration time measurement It is controlled by start stop o
86. clude an electronic data sheet The Automated Sensor Detection ASD of the XL2 recognizes the sensitivity and calibration data of the connected micro phone The electronic data sheet including the microphone sensitivity is displayed in the menu Calibrte 138 The sound level meter and calibrator should be exposed to the same environmental conditions prior any calibration for the fol lowing recommended periods e 10 minutes after a temperature change of 10 C e 15 seconds after the static air pressure has changed by 5 kPa e 10 minutes after a humidity change of 30 without conden sation The described calibration method and correction data apply for the following environmental conditions e Temperature 10 C to 50 C e Static air pressure 65 kPa to 108 kPa e Humidity 25 to 90 r H without dew from 10 C to 39 C Calibration INT AUDIO meee LA Gl aso 14 43 S meee LA Gl asp 22 04 S ae 7 spectral Correction Ott ee te eos Sensitivity 23 7 MPa 5 H2 2ii FACTORY j i E 4 ail i ae 3 User Calibration ati14 6dB kun oe Lop S7T 9dB ASO Data z ASO Data ee ee ee HTi Audio M2211 SHo 81162 Factors Sens User Sens Fact U 5 23 T mPa WPa actors Sens ser Sens eset Pa Pg 139 INTi AUDIO 48V ASD Calibration The XL2 provides 48 V phantom power supply to the connection microphone or sensor An NTi Audio measurement microphone with automated sensor detect
87. compressed audio 12 hours linear 1 hour keeping the file size small for easier handling on the PC The number 5 increments for each successive wav tile 47 INTi Sound Level Meter AUDIO The advantage of wav tile recordings is to identify and docu ment sound sources after the measurement For example at a live event an excessive peak level may have been measured and logged Actually this peak level was caused by people shouting nearby the measurement microphone and not by the audio system being monitored The recorded wav file assists in verifying this and the test results can then be post processed If any ongoing measurement Is paused L the XL2 continues the recording of wav files during the paused period The logged data and audio data can be synchronized using the stored real time information The wav files are stored in a folder named for example 2011 11 30_SLM_000_AudioEvent_0001 0200 The actual wav files are named for example as Xxxx_FS133 0dB PK wav xxxx incrementing number 48 Another example is environmental noise monitoring Listening to the recorded wav file after the measurement may help to determine the predominant sound source The XL2 Analyzer preserves the original absolute test signal level in the recorded wav tile The XL2 Analyzer provides three input ranges to accom modate the wide range of input signals The dynamic range of the recorded wav file is set according to the selected in
88. cs of ambient noise might be highly impulsive while a pre requisite for accurate speech intelligibility measurements is a negligible impulsivity in the ambient noise Under such cir cumstances the speech intelligibility measurement should be ga edtA See 0 8 s shifted to a more suitable time of the day e g night time E Tl FIHISHEC WUINIIIIIIIIIIIIIIIIIINII INTTI e First measure the ambient noise e Secondly measure the speech intelligibility This sequence simplifies the measurement as follows The XL2 immediately displays the speech intelligibility result with ambient noise correction This result provides a guideline if repeated measurements at the same location with averaging is required For details see the 128 STIPA INTI AUDIO e Select the correction page Cor New announcement systems are commissioned e g at public e Turn the rotary wheel to select the parameter Ambient areas prior the grand opening Thus the actual ambient noise Noise Correction and press enter caused by the public is not available yet during the speech in telligibility measurement Here you may simulate the real life condition with ambient noise data enabled by one of the fol lowing modes Utilize a reference noise file which might be applicable for the actual project Measure the ambient noise at another similar project and Hoise to add k a store this as reference noise file gt 55 STIFA Cor LR El au 19
89. customized tolerance file need to be tab separated e The individual tolerance file entries may be in any order no sequential order required e Tolerance file templates and standardized tol erance Tiles are a free download for all regis tered XL2 customers on the support website at htto my nti audio com For details see the Capture Tolerances Unit dBr Mode HighLow Columns Frequency Min ATolerances UNDEF 80 ZTolerances UNDEF 80 BandTolerances LevelOffset 0 HideUnusedBands false nAllowedViolations 0 Ideal undef undef 90 90 INTi AUDIO 157 INTi AUDIO Unit Mode Columns ATolerances C Tolerances 158 Capture Tolerances dBr relative fixed setting Describes tolerance type the XL2 allows set ting of the tolerance type independently of the tolerance file HighLow Utilizes upper and lower toler ance based on Ideal reference High Utilizes only upper tolerance based on ideal reference Low Utilizes only lower tolerance based on ideal reference Column headings for further tolerance data separated in different columns Frequency Min Ideal Max Defines the tolerance band for the A weighted wideband level not mandatory Defines the tolerance band for the C weighted wideband level not mandatory Z Tolerances Band Tolerances LevelOffset Defines the tolerance band for the Z weighted wideband level
90. cuum cleaners e Cinema Comparing frequency responses against an ideal response curve according the X Curve requirements The XL2 Analyzer compares spectral measurements against a tolerance band and visualizes exceptions in every frequency band The passed failed condition is further visualized by the limit button W and forwarded to the I O interface of the instru ment in order to drive an external alarm device such the acces sory SPL Stack Light Tolerance curves can either be imported from txt files or direct ly derived from captured measurements The XL2 calculates tolerance bands based on e Single captured results e Manually generated txt files on the PC e Mean average of multiple captures e Min Max curves of multiple captures 1 12 Octave Tolerance INTi 1 This field offers two functions e Symbols for measurement results 2 14 13 A ee Upper parameter displayed as line eee ALPET aso 10 00 2 Fa TS4HB 1 12 OCT 12 uu Lower parameter displayed as bargraph aa Live 43 506 F 2 90 kHz 11 Bo e Capture amp Start Tolerance Mode The displayed spectral readings may be captured in C1 C8 for 10 e Comparing measurement results against captures with relative or absolute curve display e Creating tolerance masks based on captures for pee ee a passed failed measurements MANGE so TOMS Ml Saroa ga is Capture EQ Captures the upper parameter Capture Live Captures the lower parameter 97 aNT
91. dited manually e Measured Date Time This information is documented in the measurement re port This LAeg is calculated based on the octave band levels you may manually set this level in accordance with the typi cal noise level at your application Adjustable octave band level from 125 Hz to 8 kHz Select EDIT with the rotary wheel to adjust the indi vidual octave band levels On Ambient noise correction is active Off Ambient noise correction is deactivated STIPA INTi AUDIO Individual octave bands are marked with in case of a e Missing test signal level e Invalid modulation indices mr1 or mr2 gt 1 3 e Changes in ambient noise or any impulsive noise during the measurement 2 The measurement result flashes in combination with the question marks in case of a e Question Mark at one or multiple octave bands See the STIPA Table Result Page on the XL2 for details e Changes in ambient noise or any impulsive noise during the measurement In case the question marks are flashing then the measurement is faulty Verify possible causes and repeat the measurement For details see the chapter STIPA Measurement Hints 123 AUDIO Select the STIPA signal source according your application re quirements The XL2 reads the electronic data sheet of the connected NTi Audio measurement microphone and switches the 48V Switch on the STIPA test signal at the signal source phantom power automatically
92. e ments at least at a representative set of locations If the STI is too high e g STI gt 0 2 the measurement results are like ly to be erroneous Then the speech intelligibility measure ment should be carried out without this noise being present Utilize the ambient noise correction for such instances e At locations with varying conditions e g some public areas with few people and other areas with crowds the worst case speech intelligibility should be measured Consult the local regulations e g the NFPA code in the U S for direc tives concerning measurement locations and number of re quired measurements under which circumstances 131 AUDIO STI gt 0 63 One single measurement is sufficient STI lt 0 63 Perform three subsequent measurements for this measurement position e f the maximum result deviation of these three measurements is gt 0 03 then further three measurements shall be performed e f the maximum result deviation of these mea surements is gt 0 05 then the cause of this in Stability shall be evaluated and removed e The arithmetic average of the performed three or SIX measurements has to be reported Utilize the STIPA Reporting Tool for the documentation of your measurements according the standard An STI gt 0 63 ensures that the speech intelligibility is higher than 0 5 with a confidence level of 95 132 Only high quality CD Players should be used to reproduce the STIPA test sig
93. e Type Approval Option upgrades the instrument to the XL2 TA the sound level meter dedicated to certified measure ments The XL2 with the M2230 microphone forms a type ap proved sound level meter oerna class 1 performance accord For example Actual Lmin Lmax Leq with frequency weight ing A C and Z and time weighting F and S can be measured at the same time All measurement results are simultaneously available You may log all acquired level information including real time information onto the removable SD Card To com plete the documentation of the measured sound pressure lev els the XL2 offers wav file recording as well as the facility to add voice notes for each measurement The XL2 measures correction values between the loudest point of the live event and the actual measurement positions in accordance with DIN 15905 5 and SLV In parallel with the wide band parameters the XL2 measures the real time spectrum either in 1 1 or 1 3 octave band resolution The RTA perfectly suits tasks such as optimization of sound systems 22 The Extended Acoustic Pack offers the following additional fea tures for sound level and acoustic measurements SLMeter RTA function Recording of linear wav files 24 bit 48 kHz Percentiles for wide band and spectrum with flexible set ting from 0 1 to 99 9 Sound Exposure Level LAE 100ms logging Event triggered audio and data recording Time weighting Impulse Lxl Lxleq with x A C Z
94. e XL2 Analyzer at the re quired height up to 1 7 m NTi Audio 600 000 397 1x included with XL2 NTi Audio 600 000 374 Further Information Individually tested high performance card for data storage NTi Audio 600 000 385 Individually tested high performance card for data storage NTi Audio 600 000 386 INTi AUDIO 215 INTi Further Information AUDIO NTi Audio guarantees the function of its products and the in dividual components for a period of one year from the date of sale During this period defective products will either be repaired free of charge or replaced These guarantee provisions do not cover damage caused by ac cidents transportation Incorrect use carelessness non origl nal accessories the loss of parts operation with non specitied input voltages adapter types or incorrectly inserted batteries NTi Audio accepts no responsibility for subsequent damage of any kind The warranty will be voided by carrying out repairs or services by third parties who are not part of an approved NTi Audio Service Centre Consumers may have legal statutory rights under applicable national laws relating to the sale of consumer products This warranty does not affect your statutory rights You may assert any legal rights you have at your sole discretion 216 Your NTi Audio instrument has been carefully tested during production and corresponds to the specifications listed in Technical Data Calibrat
95. e files may contain invalid data at the end of the file which you may delete to create a valid report Data Management e Connect the XL2 with the USB cable to the PC SLMeter 123 LAR Gl ast 17 01 S 3 LAF UII SET W RAGE 140 cnr atooenn e Select Mass Storage and confirm with enter INT AUDIO 175 INTi AUDIO Data Management Pets Projects autorun inf ran E e Open the folder Projects and the subfolder MyProject 176 If the XL2 is started with USB connection to PC then the COM port mode is automatically activated for remote measurement or the XL2 Projector software Therefore if you want to access the data in the SD Card then start the XL2 first and connect the USB cable to the PC afterwards 1 2 al MyTost SLM OOO 123 Log tet 3 MyTest_SLM_000_123_Report txt 4 od MyTest_SLM_000_Audio_F5133 0dB PK _00 wav 5 E MyTest SLM O00 RTA 3rd Log txt 6 ve My Test_SLM_O00_VoiceNote way 7 lak MyTest_SLM_O01_Screenshot bmp system file for use by XL2 only It contains the measure ment data and test configuration of the last measurement cycle for later reload and view of measurement results in the XL2 The XL2 logs sound levels in pre defined log time intervals Final report after the completed measurement For more ingi The wav file is the recorded audio file The index FS133 0dB PK in file name represents the full scale peak level of
96. e results in columns Furthermore a series of free MS Excel application templates pro videaconvenientwaytoviewthemeasurementresults of specific tasks and create simple reports They are available as free down load for all registered XL2 customers on the support website at http my nti audio com Enable all macros when opening the document For the most comprehensive analysis of logged noise monitor ing data use the XL2 Data Explorer software The data import into the software is enabled by the Data Explorer Option which needs to be installed in the XL2 Sound Level Meter More de INTi AUDIO Sound Level Meter The XL2 reads the electronic data sheet of any connected ASD microphones provided by NTi Audio and switches the 48V phantom power automatically on as follows e Connect the measurement microphone to the XL2 e Switch on the XL2 e Position the XL2 at the measurement location using a micro phone stand or tripod e Select the SLMeter function in the measurement menu and toggle with page to the real time analyzer RTA page nima All wideband and RTA levels are measured and logged simultaneously You select the sound levels to be displayed 39 INTi Sound Level Meter AUDIO The XL2 displays two different sound pressure levels at the same time You configure which test results to display e g LZFmax 8nd LZFlive e Select the frequency weighting Z e Ensure no other measurement is going on The run i
97. e screen e Set Append mode available yes in order to have the ap pend data feature available in the memory menu LBL e You may allow setting the measurement range within your profile thus select Allow manual ranging yes e Select Save and press enter e Select the profile MyProfile and press enter 145 INTi Profiles AUDIO e Select Profile in the main menu and press enter The profile name is displayed when a measurement function is highlighted The main menu offers only the measurement functions enabled by the profile plus the calibration and profile menu SLMeter 123 s LA Bl lt asp 13 24 S e Press start Dal SLHeter FERRET E i ast 13 24 g FROFILE MeFrofile m 1 3aB LAF max dB Lae a dB HANN g TONON 30 RHGE 130 Sy a0 8s 08 LAF max dE MINNI SEEE 30 ANGE 130 aH of naan LAeq e Choose Select and load the required profile e Wait 10 seconds until the measurement is finished e To return to the full mode either switch off the XL2 amp again or select EXIT Profile in the main menu 146 If you have two or more XL2 Audio and Acoustic Analyzers you may like to transfer the same profiles to the other instru ments e Select Profile in the main menu and press enter e Select Manage and press enter e Select Export to SD Card and press enter e Connect the XL2 to the PC e Copy paste the profile called MyProfile to the PC Profiles INTi AUDI
98. e test signal is used the result may deviate by maximum 0 03 STI Max Min at the same measurement position Shows the time averaged sound level of the 15 seconds measurement cycle time Actual sound pressure level Bargraph display and interpretation of the speech intelligi bility measurement result e Exlnt 0 75 1 00 STI e Good 0 60 0 75 STI e Fair 0 45 0 60 STI e Poor 0 30 0 45 STI e Bad 0 00 0 30 STI The STI value is shown as a letter of the qualification scale below which informs about the typical STI requirements for dedicated applications Band A C STI Range gt 0 76 0 72 0 76 0 68 0 72 0 64 0 68 0 60 0 64 0 56 0 60 0 52 0 56 0 48 0 52 0 44 0 48 0 40 0 44 0 36 0 40 lt 0 36 Examples of typical uses recording studios theatres speech auditoria parliaments courts theatres speech auditoria parliaments courts teleconference theatres class rooms concert halls concert halls modern churches PA in shopping malls public offices cathedrals PA in shopping malls public offices PA in difficult acoustic environments PA in very difficult spaces not suitable for PA systems not suitable for PA systems The speech intelligibility result is displayed in STI Speech Transmission Index or CIS Common Intelligibility Scale whereby CIS is calculated as CIS 1 log STI ed4 0 actual edition released in 2011 with continuous level depend
99. e time averaged sound level EQ All available selec e Select the upper result parameter with the rotary wheel Q tions are Z weighted no weighting iri Oct LA BA aso 12 27 S TS de iriz OCT ts Live TrasdB 21 88Hz JEA AZ i HDO 60 40 20 h 16 E 250 ik YL 1Bk Ae iBk Ae Mm SET 1 Mn E ri Re ee ee e Confirm with enter e Confirm with enter 103 INTI 1 12 Octave Tolerance AUDIO Select the lowest possible input range according to the maxi mum level expected during the measurement e Select the input range RNGE and press enter iriz i E e Turn the rotary wheel amp to set the applicable input range and Eld l2 OCT confirm with enter Ma Li Select reading mode 100 l h h S an DIFFERENCE Liz Oct oT KL A ASD 11 20 a EG dE 1 i2 OCT Bo ae Live B3 5dB 21 8HHz Bo a0 kg 1E 1B AZ BO TT Ce Tale ale 40 ANGE tuo Teds Ment opopop a 20 e Select EQ for normal absolute display of measurements a a ah UUUNAINNIIN SET Follow me same Instruction and select the lower spectral 40 FHGEERE Tails Mo pyposinneae reading Live Press start D to measure and display the sound levels results indicated with 104 e The XL2 measures the selected sound pressure lev als Live and EQ All available sound Z weighted no weighting e Press start Dm Paka SLE d ast 14 30 g Ef T1 z dE
100. eaker A mute speaker B e Position yourself with the XL2 at the measurement position next to speaker B sub left as indicated above This is the worst case position in the auditorium with regard to acoustic delay in the sound field The XL2 uses the VoiceNote micro phone for the delay test do not connect any measurement microphone HAm Act 7777 ms Distance ZAP i UVQQQQQUUOONNONQQQUUOONNNQQQUUTONUONQQQUUOONNNQQQUUUOONNSQQQUUUOONOSQQUUUUUUII 00 00 Hegzure 05 00 e Disconnect the audio cable with the synchronizing signal from the XL2 allowing you to move around freely for the delay measurement When selecting Minirator as the delay signal source the XL2 has to be synchronized to the signal source again after 5 minutes When selecting CD Player as the delay signal source the XL2 has to be synchronized to the signal source every 100 seconds 13 45 S Delay Signal B ice MWinirater Act Delo ae 60 5ms A Ams Act BOG ms Distance ZAC A0 Orm UNQUITNQUTUQUUNUNUNUNUUNUNUUTENQUUONOUONNUUOUNQUONOQUONNGUONEQUONEQUUNNNTT 00 00 Hegzure 05 00 93 INTI Delay Time AUDIO e Select the displayed 0 0 ms below Act Delay with the rotary e Start the delay test signal at soeaker B Mute speaker A wheel amp and press enter e Position yourself with the XL2 at the shown measurement position The XL2 uses the VoiceNote microphone for the de lay test do not connect any measurement microphone
101. ed p Provides automated repeated measurements with user defined preset measurement time cycles e Set the required measurement time e Press start ba For consecutive storage of all measurement cy cles select the parameter Naming Saving auto in the memory menu Each individual cycle result is then automatically stored to the SD Card Sound Level Meter INTi AUDIO 8 qa Provides automated repeated measure 48V The XL2 provides 48 V phantom power supply ments synchronized to the XL2 real time clock to the connection microphone or sensor Press start D to begin the measurement In order to align the selected preset measurement ASD An NTi Audio measurement microphone with time with the real time clock the XL2 shortens automated sensor detection ASD is connect the first cycle to match the real time clock syn ed The XL2 reads the electronic data sheet of chronization All following measurement cycles the microphone and switches the 48V phan are synchronized to the real time clock tom power automatically on For example the cycle time setting is 30 minutes Phantom power is switched off and the measurement starts at 750 a m gt the first test cycle measures from 750 8 00 a m 9 Thereafter a new test cycle starts automatically This field offers two functions for 30 minutes The 30 minute cycles repeat until the measurement Is stopped e Symbols for measurement results 15 The measurements in the synchronized repeat Upper
102. ed event dura 14 tion 15 after the key press See 3 e Retrigger with every repeated key press within the event duration 53 INTi Sound Level Meter AUDIO 15 on key release he event is recorded as long as the button of the input key PLEC Et LA Gl ast izes a pad is kept pressed minimum the preset duration at Min Event Start Events oon ext keypress Duration End Events on kev relegse 2 Min Event Quration HA HH H5 7 th ah 7 T e a T on ext key e event is stopec y pressing a but press ton on the external input keypad latest Log Audio Events Only after the preset duration at Max Event Format Compressed AGl Duration 16 Status Stopped HOnITOR treat each key All four buttons operate individually separately For example pressing the button 2 will be recorded as button 2 In the measurement report This allows characterizing different acoustic noise sources Event count HABE treat all keys as All four buttons operate parallel and Key 1 will be recorded as button 1 in the measurement report 54 Sound Level Meter INTi AUDIO e Select the logging page set Logging On Interval dt Triggered event recording requires the activa 00 00 01 and choose the required log values tion of sound level logging Using the default e Setup the event page For example the screenshot below Interval dt 1 second is recommended starts the event recording after LAF exceeds 80 dB for 2 sec onds and stops a
103. ed on the XL2 Support Page e The XL2 displays the pop up window USB Mode http my nti audio com e Select Mass storage The PC thus recognizes the XL2 as a mass storage device Updating the firmware on the XL2 is executed by placing the Double click the file XL2 htm 1 The web screen XL2 In XL2Vxxx xx file in the root directory of the XL2 When started strument Status opens the XL2 automatically completes the firmware update e Select Look for FW Updates The web screen XL2 Sup port Page opens e Compare the firmware version to the latest version avail able e f an update is required download and save the firmware file XL2Vxxx xx into the XL2 root directory Projects je iz htm Coxe svs e Remove the USB cable and power up the XL2 e Watch the display and wait until the update is finished This file opens the XL2 instrument status page for online If you have no web access at all please contact the local NTI e Firmware updates Audio partner You will receive the new firmware file e Activation of options 203 INTi Further Information AUDIO The System menu shows the installed options on the XL2 The following options extend the measurement functions of the XL2 NTi Audio 600 000 338 The XL2 Analyzer measures the speech intelligibility ac cording to the latest revision of standard IEC 60268 16 2011 edition 4 and older editions It includes ambient noise cor rection and automated a
104. ed operator interfaces Advanced users may access all menus settings and store their preferred measure ment configurations For simplicity the XL2 Audio and Acoustic Analyzer offers fixed operator interfaces with specific pre de fined settings The XL2 can boot up with exactly the required measurement parameters according to the pre defined instru ment configurations This ensures accurate measurements are achieved in both advanced and basic usage environments 142 e Select Show profile list 1 in the System menu e Press enter to activate Yes This will show the profile list at startup System Set El ast 12 53 a Auto power off 16 Min Backlight Auto n Dimmed Date 2Ai2 0r 27 Time ote Ss Action at power on 1 Show aCA Tes Remember Spedker Enabled USB mode Ask on connect Dec separator Fhantom power e Start the XL2 Analyzer in Full mode e Select the typically used measurement function and adjust the measurement parameters according to the requirements For example measuring the sound levels Lar LAeq and LAFmax for 10 seconds B Ga 12 LA E ASD 13 24 S 69 6dB LAeq E e e dB LAF max dB TT SET Ou po 40 RHGE 230 med BCE Profiles INTi AUDIO e Select Profile in the main menu and press enter Profile LAeq LAF max TT 30 BHGE 130 SLMeter 123 LA H ASD 13 24 qi 53 6dB 143 INTi Profiles AUDIO e Select Manage and
105. ed with the respective model M2211 XL2 e XL2 Analyzer without e Test Signal CD Micro e USB cable phone e Li Po battery e Hand strap e Operating manual XL2 e XL2 Analyzer M2230 e M2230 Measurement Microphone consisting of MA220 Microphone PreAmplitier Microphone Capsule for M2230 XL2 e 50 mm Windscreen M4260 Introduction Microphone holder MHO1 with Adapter 5 8 3 8 Individual Frequency Response Chart Test Signal CD Li Po battery USB cable Hand strap Operating manual XL2 Analyzer M2211 Measurement Microphone consisting of MA220 Microphone PreAmplitier Microphone Capsule for M2211 33 mm Windscreen Microphone holder with Adapter 5 8 3 8 Test Signal CD Li Po battery USB cable Hand strap Operating manual XL2 Analyzer M4260 Measurement Microphone 33 mm Windscreen Microphone holder with Adapter 5 8 3 8 Test Signal CD Li Po battery USB cable Hand strap Operating manual Overview INT AUDIO 2 Overview Di Mount XL2 interfaces Digital 1 0 Headphone 2 Output USB Connector XLR Input TOSLink Output RCA Input QSD Card Voice Note Input DC Power Socket INTi Overview AUDIO Either a balanced audio signal an NTi Audio measure ment microphone or the microphone pre amplifier MA220 plug directly into the XLR input The Automated Sen sor Detection ASD technology reads the electronic data sheet of any connected
106. elect the X Axis with the rotary wheel and confirm with enter e Toggle with the rotary wheel k3 between the ranges Confirm with enter 14 15 Actual sound level with time weighting F Fast A Z Broadband sound pressure level without any fre You may select any frequency to read out individual levels A weighted broadband sound pressure level quency weighting The selected frequency is indicated by the cursor arrow Choose between the following settings A ial The cursor follows automatically the highest level e g tracing feedback frequencies at live sound e Select the frequency with the rotary wheel Press enter e You may readout any individual frequency e Return to auto frequency with enter Sound Level Meter INTi AUDIO The cursor read out may be set manually to any frequency band or wide band level The read out re mains at the selected frequency e Select the frequency with the rotary wheel e Press enter e Select the frequency of interest Confirm with enter 43 Set the RTA result display to 1 1 octave or 1 3 octave band resolution as follows e Turn the rotary wheel 3 to select the parameter 7 e Press enter to toggle between 1 1 OCT and 1 3 OCT to set this parameter 31 INTi Sound Level Meter AUDIO 17 Select the measurement unit as follows dB Sound level in dBSPL This measurement unit is permanently selected upon connect
107. ement data are stored on the SD Card in ASCII format 73 INTi Reverberation Time RI60 AUDIO The XL2 measures the energy decay from 63 Hz to 8 kHz using the Schroeder method in 1 1 octave resolution The optional Extended Acoustic Pack enables 1 3 octave band reso lution from 50 Hz to 10 kHz Use either an impulse source e g a starter pistol or an interrupted pink noise as the test signal Reverberation time RI60 is the time required for the sound pressure level to decrease by 60 dB after the sound stimulus signal is stopped For simple practical measurements the ap plicable standard ISO 3382 specifies the following two mea surement methods e 720 The measurement requires just a small dynamic measure ment range of 35 dB above the ambient noise level for each frequency band RT60 T20 3 x decay time of 20 dB e T30 The measurement requires a dynamic measurement range of 45 dB above the ambient noise level for each frequency band RT60 T30 2 x decay time of 30 dB 74 In detail the RI60 is based on a linear least squares regres sion of the measured decay curve If the overall RT60 is short e g lt 0 3 seconds the room acoustic is referred to as be ing dead for example a heavily furnished room with thick carpets curtains and upholstered furniture may have such an acoustic character If the overall RT60 is long say more than 2 seconds the room acoustic is referred to as being live and e
108. ements to the same report file in the append mode INTi AUDIO 185 INTI XL2 Data Explorer AUDIO XL2 Data Explorer is a PC based software application with a powerful data processor for easy and fast analysis of sound lev el measurement data It is dedicated to acoustic consultants Supported operating systems and noise measurement professionals XL2 Data Explorer pro Windows XP SP3 vides a convenient way to view analyze and manage data and Windows Vista SP1 or later quickly creates customized reports e Windows 7 8 Hardware requirements Features of the XL2 Data Explorer software e Pentium 1 GHz or higher with 512 MB RAM or more e Data visualization e Minimum free disk space 2 GB e Fast zoom and pan e Video board with shader model 3 0 or higher e Audio playback synchronized to graph e GPU with DirectX9 0 c e Markers with on the fly calculations e Visualization of recorded events e Customized Reporting Download the software at the XL2 Support Page http my nti audio com The data import requires the Data Explorer Option installed on the XL2 186 Fle View ji Markers Help XL2 Data Explorer RAR R o amp BY Gene 17 Jan 11 55 00 17 Jan 11 55 00 17 Jan 11 55 00 XL2 A2A 02868 D2 2 70 12 00 00 12 00 00 12 00 00 12 05 00 12 05 00 Helicopter 12 10 00 12 10 00 12 10 00 12 15 00 12 15 00 6o W AGc oaB Cursor Position 17 Jan 12 16 05 Time Resolutio
109. ence noise will be further amplified by the measured k values 58 Level Differenc Prior to the start of the live event the level difference between the loudest and the measurement position is measured The XL2 Analyzer calculates the level difference automatically based on the individual sound level measurements at both locations This level difference is included in the sound level reading dur ing the live event and the XL2 thereby displays and records the sound pressure level of the loudest point V easurement Position Microphone Level difference oudest audience area Audience XL2 positioned at FOH Position Sound Level Meter INTi AUDIO Play a pink noise signal at the typical sound pressure level of Wait until the measurement is completed the live event Signal source Minirator NTi Audio Test CD e Position the XL2 at the measurement position Select the correction page set e Turn the rotary wheel amp s to select the parameter RUN next Search the audience area for the location with the highest to Measure and press enter sound pressure level and position the XL2 Analyzer Turn the rotary wheel amp to select the parameter RUN next to Audience and press enter SLMeter Eset ALA Gf 4 ast 13 24 a Fosition L n L Sl Meter Fen U E lt ast 43 24 am eich ooo Position Laegs LePeak Audience MM L2dB 115 7dB e eA d6 0E Measure KUN sanagi dE Measure RUN een
110. ent auditory masking function ed3 0 old edition released in 2003 with stepped level dependent auditory masking function ed2 0 old edition released in 1998 with fixed masking function Comparison of the IEC 60268 16 Editions 1 T 0 9 ep S gt 08 D 2 edition 2 0 1998 0 7 T edition 3 0 2003 0 6 edition 4 0 2011 0 5 20 40 60 80 100 Level Lig STIPA INTi AUDIO Measurement status indication a single speech intelligibil ity measurement takes 15 seconds The actual measure ment time and measurement status are Indicated here Select between these pages Speech intelligibility measurement result Table result page with modulation indexes and sound levels for each octave band On site averaging of results Ambient Noise Correction The page button toggles between the 123 Tab Avr screens These pages show the speech intelligibility mea surement results The page Cor offers setting the noise spectra prior the STI measurement Frequencies 125 Hz 8 kHz in 1 1 octave band resolution Individual time averaged octave band level Leg 121 INTi 122 S TIPA AUDIO For good speech intelligibility it is mandatory that the in tegrity of the transmitted voice signal modulations are pre served Therefore STIPA is based on measuring the MTF Modulation Transfer Function This function quantifies the degree to which the voice modulations are preserved in individual octave bands The STIPA meth
111. eous e XL24 M2230 17 dB e XL2 M2215 25 dB e XL24 M2211 21 dB e XL2 M4260 29 dB 138 dB 153 dB 144 dB 144 dB gt gt Ss e XL2 M2230 24 dB A 138 dB 27 dB C 138 dB e XL2 M2215 33 dB A 153 dB e XL2 M2211 29 dB A 144 dB e XL2 M4260 35 dB A 144 dB typical microphone sensitivity 219 INTi AUDIO Stabilization Time Integration Time Display Measure ment Ranges 220 Specifications lt 10 seconds Three level ranges depending on the microphone Minimum 1 second Maximum 100 hours minus 1 second sensitivity with manual setting M2230 sensitivity 42 mV Pa LOW lower level range 0 100 dBSPL MID mid level range 20 120 dBSPL HIGH upper level range 40 140 dBSPL M2211 sensitivity 20 mV Pa LOW lower level range 10 110 dBSPL MID mid level range 30 130 dBSPL HIGH upper level range 50 150 dBSPL M2215 sensitivity 8 mV Pa LOW lower level range 20 120 dBSPL MID mid level range 40 140 dBSPL HIGH upper level range 60 160 dBSPL M4260 sensitivity 26 mV Pa LOW lower level range 10 110 dBSPL MID mid level range 30 130 dBSPL HIGH upper level range 50 150 dBSPL Residual noise in dB S 42 mV Pa of XL2 without measure ment microphone e Frequency weighting A Level range Leg Loeak LOW 4 17 MID 18 31 HIGH 4
112. eports to the PC settings This simplifies data post processing on the PC e Navigate to the Dec Separator function 8 with the ro tary wheel e Toggle between parameter and with enter to set this Setting of the calibration menu Standard The default calibration menu is displayed Show The calibration menu is extended by the Spec selection of the spectral correction for the Corr outdoor measurement microphone M2230 WP This allows enabling the spectral correc tion for horizontal noise incidents using the M2230 WP 163 INTi 164 AUDIO system Settings cera time Int El ast 16 49 a Firmware DURC a Pa Serial number Options Extend Acoustics Installed STIFA Installed Remote Heasuremnt Installed Spectral Limits Installed Cinema Assistant Installed Type Approved Installed Dota Explorer Installed HeA 83 199 02 12 Displays of the firmware version number to update the Displays the instrument s serial number Displays the options installed on the XL2 Every installed option may be temporarily Hidden to gener ate a profile for other XL2s without this option installed e Select the installed option e Toggle with enter to set this parameter erate sch Ef aso 14 07 Scheduling Function SLHeter ATA Start 2A11 11 16 t ii i Duration HHHH Recurrence On Does Mo Tu We Th Fre End after 8S occurences Start Schedule System Setti
113. er level is reached Alternatively the measurement may start manually by pressing start bal False No auto start function default setting 159 INTi Capture Tolerances AUDIO AutoStartTrig Sets the sound level in dBZ for an automated gerLevel level trigger the passed failed measurement starts as soon as the set level e g 95 dB Is reached or exceeded The actual input level can be monitored at the Input range bar man datory if AutoStart is True used otherwise not mandatory AutoStartSet Defines the settling time after the auto start tlingTime trigger level is exceeded until the start of the measurement the time is set in 100 millisec ond steps e g setting 0 5 equals a settling time of 0 5 seconds If the input level drops below the auto start trigger level during this period no measurement is carried out not mandatory MeasTime Defines the measurement time in 100 millisec ond steps e g setting 1 5 equals a measure ment period of 1 5 seconds not mandatory 160 The various system settings of the instrument can be adjusted as follows Turn the rotary wheel to navigate to the main menu 1 and select System Confirm with enter SELGE et E aso 20 43 g Auto power off 16 Hin Backlight Auto On eOinned Date 2015 01 21 Time Coeds Action at power on Show profile list Yes Fhontom power Remember Speaker Enabled USE mode Ask on connect Dec separator Calibrate Menu Stand
114. eration Time RT60 Polarity Delay Time RMS Level and Distortion Scope Spectral Analysis with Tolerance Man agement optional Noise Curves Speech Intelligibility optional Calibration and verification of cinema loudspeaker systems optional Calibration Menu for microphone Store and load measurement profiles system Settings Toggles between available measurement and result pages within the same function menu Alternatively use the page button Select XLR or RCA input connectors as the source The memory menu is used for data storage management One of the following symbols flashes before or after start ing the measurement 9 8 7 RUN LOG AUD Evt Time in seconds until instrument is settled and measurement will start Indicates the ongoing measurement Indicates the ongoing measurement with data logging Indicates the ongoing measurement with data logging and audio recording Indicates an ongoing triggered event recording Overview INTi AUDIO After a completed measurement the memory symbol 9 indicates a non saved measurement report Your measure The battery symbol indicates the battery status as follows ment needs to be stored manually For more details visit the chapter Data Management Using rechargeable Li Po battery Level indication 100 U gt 4 0 Volt Indication of enabled rear speaker or headphone output Level indication 75 U 3 9 4 0 Volt 50 U 3 8 3 9 Volt
115. erest or noise to be later excluded in the post processing A typical application is categorizing any annoying industrial noise by persons living in the neighborhood The XL2 Analyzer logs the data specified in the LOG setting for the complete measurement du ration into a log file The markers and triggered events results are added to the same log Tile The XL2 Input Keypad is available as an acces sory Please see chapter Options and Accesso ries for details 49 INTi Sound Level Meter AUDIO 100 K Event Duration y Level dB 3 70 Sa l 13 12 60 K K Time seconds Features e The levels LAeg LZeq and LCPeak are recorded for the event duration e Audio data are recorded for the triggered event duration only thus simplifying data post processing and saving memory space for long term measurements e Setting markers by external key press of the XL2 Input Key pad 50 pYwYrn O1 SLheter EtA E Ji asb Trigger Events on level gbowe Start dE 0 0 for Bes Stop d6 0 0 16 for Ass Level LAF Log Audio Events Onky Format Compressed Record whole ewent Status Stopped Curr Level 64 9dB HOnITOR Event count HABA Choose from the following settings Off No event triggering onlevel Events are triggered at noise levels above the above preset value 2 for the start duration 3 onlevel Events are triggered at noise levels below the below
116. erial number e Receive application and product news e Confirm with Register e Faster worldwide support e Now your product is listed in the table My Products e Tracing support in case of loss or theft e Calibration support 200 e Resetting to Factory Default e XL2 Starts Up with Limited Functions e Can use another SD Card e Formatting the SD Card e SD Card Errors e Error messages on display e Stored Data or Wav files not available on SD Card If the XL2 Audio and Acoustic Analyzer reacts unexpectedly a reset to the factory settings might solve the problem e Switch off the XL2 e Hold down escape and simultaneously operate On Oft Further Information INTi AUDIO The XL2 has been operated the last time in one of the sim plified application profiles and the system settings have been changed as follows Select Profile from Yes to No e Follow the above resetting to factory default Yes you can use any alternative SD Card such as offered in the e Switch off the XL2 e Insert the SD Card into the XL2 Analyzer Switch on the XL2 In case you need to format the SD Card then we recommend doing so utilizing the software SDFormatter This software en sures the best performance of your SD Card SDFormaitter is a free download at www sdcard org downloads 201 INTi Further Information AUDIO The XL2 Audio and Acoustic Analyzer writes measurement data automatically onto the SD Card during ong
117. esult is displayed Measurement results area with positive polarity The black line in the middle of relative level indicator 5 displays the measured polarity of the individual frequency band The dashed line indicates the upper limit of the measurement result area For acoustic polarity measurement you can use the internal voice note microphone or an external measurement micro phone plugged into the XLR input The polarity result for left and right speaker cabinets should match for a good stereo sound image e Feed the speaker cabinet with the polarity test signal of the Minirator e Adjust the test level at Minirator or amplifier until the test signal is clearly heard e Enable the polarity test signal at the left speaker cabinet mute the right speaker cabinet e To activate the internal microphone select Signal Source with the rotary wheel and choose Voice Note Mic with enter e Measure the polarity of the left soeaker cabinet and save the screenshot in the memory menu LBL e Enable the polarity test signal at the right speaker cabinet mute the left speaker cabinet e Measure the polarity of the right speaker cabinet e Compare the polarity test result of both speaker cabinets Polarity INTi AUDIO ate Gl ash 13 24 i gee SUE 425 250 S00 ik Zk 4k Bk aw Relative Level The sample result shows the polarity as e Sub woofer Low energy no sub installed e Woofer P
118. evel expected during the measurement Wrong Input ranges are indicated by a lt in front of the measurement val ue or a flashing OVR message in the lower menu bar Select the inout range RNGE and press enter e Turn the rotary wheel amp to set the applicable input range and 42 confirm with enter The numeric result page and the real time ana lyzer page use the same input range e The XL2 Is ready to display the measured sound pressure levels L7Fmax and LZFlive e Press start Dm SLHeter FTIR LFF mg 65 6 dE ta LEFlive 38 2dE 0 _ gt _ 40 2 eee a0 AAA 20 BO 250 ik 4k TILTI il RHGE 140 gt e Press stop Dal sLieter TITER EELEE Loe max Toe dE 1 3 OCT us L2Flige Geardk 20 0Hz Test gutosgved Js E MyProject E3 2015 01 22 _5LH_ Z Record Yolcenote a0 BO 250 ik Yk 20k z UUNNQQUNNQTANUUINI m 20 il PHIGE 110 CHT OO 1 28 e Press enter to confirm The measurement data are stored on the SD Card in ASCII format Sound Level Meter INTi AUDIO 43 INTi Sound Level Meter AUDIO A report saves the conducted measurements onto the installed SD Card The XL2 Supports setting the individual levels to be stored in the report after the measurement is completed eee Ree SLA Gf Asb 13 24 g Report Setting 1 Add Spectra All 2 Report VWolues Selected 3 0 LAeg re 1 LOPK max E p m i J H 4 g No No RTA measurement reporti
119. ften differs to the loudest posi tion of the live event Thus the correction value k1 is the correction value of LAeq60 M between the loudest position and the actual measurement position measured using pink noise The correc tion value k1 is measured or manually set in the page KSET of the sound level meter function Application Measurements in accordance with SLV SPL with A frequency weighting and F time weighting compen sating for human hearing perception at lower sound pressure lev els applicable at levels lower than 100 dB Measures the maximum environmental noise level during the measurement period Maximum level of the preset logging interval in the LOG menu e g 1 second Measures the minimum environmental noise level during the measurement period INTi AUDIO AJ FJ 251 INTi AUDIO LAFmin dt LAFxx 252 Appendix Minimum level of the preset logging interval in the LOG menu e g 1 second The statistical distribution of sound pressure levels is commonly used for environmental noise analysis such as road traffic or com munity noise assessments For example LAFxx Is the noise level exceeded during xx of the measurement period e g LAF90 is the noise level exceeded during 90 of the measure ment period Sound Level dB vs Time 90 LAF10 88 8dB LAeg 84 2dB 80 LAF50 76 4dB 707 LAF90 66 6dB 60 Time seconds LCeq LCpeak LCpeak max
120. fter LAF is lower than 70 dB for 3 seconds If Log Audio 5 is set to Events Only then SLMeter REL E BORG the XL2 sets per default Naming Saving auto Tiana one aon Tevet anos in the memory menu This ensures that the re l 7 corded triggered event data is stored on the SD Start dB 6 8 for A2s ae 99 Stop dB 0 6 18 for 3s ee Leyel Lar For convenience in case more than 20 trig gered events have been recorded the Au Log Audio Events Only tosave gt Delete function is disabled as delet Farnak Compressed ing such multiple wav files on the XL2 takes a Record whole ewent long time Status Stopped ee ae Monroe All triggered event wav files are stored in an in O O dividual folder For details see chapter Logging e Select the memory menu and create a new folder This folder will then be displayed in the memory menu All log data and event wav files are stored in this folder 55 INTi Sound Level Meter AUDIO The limit page offers two functions e Setup of limit LED amp function enabling the XL2 to highlight any sound levels that exceed the pre set limit in orange or red color The default color is green e Limit parameter setup for external Digital I O Adapter which connects to the digital I O interface The Digital I O Adapter is an optional accessory for the XL2 analyzer It serves the control of any external peripherals such as displaying sound levels that exceed limits on a big external red or
121. gers at each cycle Complete a minimum of three test cycles to accurately calcu late the uncertainty factor Perform more cycles to increase the measurement accuracy smaller uncertainty factor Using an impulse source A single measurement is sufficient thus press stop bal to end the measurement No further measurements are required to increase the statistical measurement accuracy Confirmation marks indicating success ful measurements are displayed above each band 83 INTi Reverberation Time RI60 AUDIO e Press stop Dal e f multiple cycles have been recorded then select CYC with e f applicable switch off the pink noise test signal the rotary wheel press enter and select the individual e Select the result page RES with page La cycle result with the rotary wheel Q The average reverberation time for each fre quency band is displayed in seconds and the measurement uncertainty in Within each cycle the reverberation time for each frequency band is displayed in seconds and the correlation factor in RTEA Imal ASD 13 24 S RTEA AES LA aso 13 24 S Uncert SDa cyce ARG Correlot iAH Gf Al DEL RT6hcta0 1 06s 125H2 as ATE Taon 1 lls 125H2 20 2 0 MMM 1 5 F za 1 5 r 1 5 an Ai 0 0 z z z z z z z O lil 63 125 250 500 ik ek Yk Gk B3 125 250 500 ik k 4k Bk ARG 8S HII HII ARo AS 40 RAGE 130 STAT STOP 40 RAGE 130 STAT STOP Reverberatio
122. ging MyProjects MyTest_SLM_000_123_Log txt Hardware Configuration Device Info XL2 SNo A2A 02673 D1 FW2 20 Mic Type NTi Audio M4260 S N 1486 User calibrated 2011 04 05 13 56 Mic Sensitivity 27 3 mV Pa Measurement Setup Timer mode continuous Timer set 1 Log Interval 00 00 01 k1 0 0 dB k2 0 0 dB kset Date k Values not measured Range 30 130 dB Time Start 2011 05 15 17 44 06 End 2011 05 15 17 44 16 Broadband LOG Results Date Time 15 11 2010 17 44 15 00 00 09 79 3 89 9 81 6 97 9 Level of actual logging interval e g Logging interval 1 second then LAeq_dt is the time averaged level of the past 1 second File name e g MyTest_SLM_000_123_Report txt XL2 Sound Level Meter Broadband Reporting MyProjects MyTest_SLM_000_123 Report txt Hardware Configuration Device Info Mic Type Mic Sensitivity XL2 SNo A2A 02673 D1 FW2 20 NTi Audio M4260 S N 1486 User calibrated 2010 11 05 13 56 27 3 mV Pa Measurement Setup Append mode OFF Timer mode continuous Timer set 1 1 k1 0 0 dB k2 0 0 dB kset Date k Values not measured Range 30 130 dB Broadband Results Start Stop LCPKmax YYYY MM DD hh mm ss YYYY MM DD hh mm ss ss dB 15 11 2010 17 44 06 15 11 2010 17 44 16 119 0 A Microsoft Excel form generating an automated sound level measurement report and chart is available as a free download for all registered XL2 cus
123. he battery Do not Insert the battery in reverse polarity INTi Getting Started AUDIO Alternatively the XL2 can be powered by AA type batteries e Open the battery cover e Insert 4 fully charged AA batteries observing correct polarity of the indications in the battery compartment e Close the battery cover Switch the XL2 off prior opening the battery cover in order to prevent any electronic dis charges e Use only similar batteries from the same manufacturer Replace discharged batteries with new ones e Do not mix used and new batteries During operation the battery temperature may increase noticeably This is not a defect Remove all batteries if the XL2 is not to be used over a long period of time Getting Started INTI AUDIO To avoid accidentally dropping the XL2 a hand strap is supplied with the instrument e Pull the loop of the hand strap through the opening e Pull the other end of the hand strap through the loop e Pull the hand strap tight INTi Getting Started AUDIO A convenient table stand is attached to the rear of the instru ment e Unfold the stand and rest the XL2 on a flat surface Connect an NTi Audio measurement microphone to the XLR input connector of the XL2 Getting Started INTi AUDIO e Connect the source to the XL2 with an XLR cable e Connect the source to the XL2 with an RCA cinch cable e Select the XLR input in the menu e Select the RCA input in the
124. he internal memory for comparative measurements INTi AUDIO Querying measurement data online via the USB interface of the following functions e Sound level meter and spectrum analyzer SLMeter RTA e FFT analyzer e Audio analyzer RMS THD N e High resolution spectral analyzer 1 12 Oct Tol e Enables the import of measurement data into the XL2 Data Explorer software e Powerful data processor for easy and fast analysis of sound level measurement data on PC 221 INTi AUDIO Functions of Extended Acoustic Pack optional 222 Specifications e SLMeter RTA function Functions of Recording of linear wav files 24 bit 48 kHz Spectral Percentiles for wide band 1 1 and 1 3 octave Limits spectrum Option Flexible setting from 0 1 to 99 9 optional Sampling every 1 3 ms Wide band in 0 1 dB wide classes based on sampling Lxy x A C or Z y F S or EQ 1 1 and 1 3 octave spectrum in 1 0 dB wide classes based on Lxy x A C or Z y F or S Dynamic range 140 dB Sound Exposure Level LAE 100ms logging Event triggered audio and data recording Time weighting Impulse Lxl Lxleq with x A C Z True peak level in 1 1 and 1 3 octave resolution Clock Impulse Maximum Level TaktMax and values as specified in DIN 45645 1 e FFT function High resolution Zoom FFT with selectable fre quency ranges and resolution up to 0 4 Hz in the range of 5 Hz to 20 kHz e RT60 function
125. i 1 12 Octave Tolerance AUDI Manage Allows to rename captures clear re 3 captures corded captures save captures to SD e Select the YAxis with the rotary wheel and confirm Card for export from the XL2 or load with enter captures from SD Card for import to e Select the zoom factor between 20 10 5 2 5 dB div the XL2 and confirm with enter e Scroll up and down with the rotary wheel amp s to select the Start tolerance Starts the tolerance mode for passed Y axis range mode failed measurements comparing the Confirm with enter actual measurement results against a tolerance band 4 Spectral results in 1 1 1 3 1 6 or 1 12 octave band resolu 2 tion Adjust the resolution at 2 Actual level result of the indicated frequency band The cur sor readout displays the center frequency and the level of the band indicated by the arrow Upper parameter displayed as line uu Lower parameter displayed as bargraph 98 The XL2 Analyzer provides three input ranges to accom modate the wide range of input signals The individual rang es are based on the microphone sensitivity setting in the calibration menu of the XL2 For example at a sensitivity S 20mV Pa the input ranges are e Lower range 10 110 dBSPL e Middle range 30 130 dBSPL e Upper range 50 150 dBSPL Select the lowest possible input range according to the maximum level expected during the measurement e g if the sound pressure will be always below
126. i ll mK SLMeter 123 LP po ASD 16 33 ware installation assistant e f prompted select No connection to Windows Update and continue with the installation e Complete the installation LAeggttkl 2 XL2 Projector displays the instrument screen in real time 0 R f E E Features e The upper window bar displays the XL2 serial number e The menu bar supports remote instrument operation of the XL2 Analyzer from your PC 6 qj Fi ad A E e All data stored on the SD Card can be accessed directly from the XL2 Projector software Complete your measurements and click on the SD Card symbol H i 3 by cf E roe Se a SET ai a p GS Gocco For more details and features click the symbol on the XL2 Projector Software 189 INT Remote Measurement AUDIO itoring Network Multiple XL2 Analyzers connect with USB Device Servers to a network for online monitoring of noise or other signals An instance of the Projector Software may be started for each XL2 Analyzer with all XL2 screens being simultaneously displayed on the PC monitor The Projector Software offers the control of each XL2 Analyzer from your PC LAN WAN Network Please contact NTi Audio for application details 190 e M The XL2 Analyzer offers an optional remote measurement func tion This allows querying the XL2 measurement data online via the USB interface Thus customers may program their own measurement application on the computer
127. ics Temperature Humidity Susceptibil ity to radio frequencies Electromag netic Com patibility Protection Rating ATEX 226 Specifications Real time clock with lithium backup battery e Recommended calibration interval one year e Microphone calibration with external calibrator supported e Optional calibration certificate for new instruments available e Tripod or microphone stand mount 1 4 e Wire stand mounted on rear side e Display 160 x 160 pixels grey scale with LED back light e Dimensions L xW x H 180 mm x 90 mm x 45 mm 71 XxX3 5 X16 e Weight 480 g 1 Ib including built in Li Po battery 10 C to 50 C 14 to 122 F 5 to 90 RH non condensing Classification Group X CE compliant EN 61326 1 Class B EN 55011 class B EN 61000 4 2 to 6 amp 11 IP51 e For applications in explosive atmospheres within zone 2 in accordance with IEC 60079 e Conforms to 94 9 EC All specifications are according the standard EC61672 Other applicable standards are listed the corresponding specification position Microphone Type Classification according IEC 61672 and ANSI 1 4 Capsule Transducer PreAmplifier Type Flatness tolerance bands typical Frequency Range Residual Noise Floor typical Maximum SPL THD 3 1 kHz Sensitivity typical 1 kHz Temperature Coefficient Specifications M2230 M2230 WP M2211 M2215 Class 1 Certified Class 1 Frequency High SPL Ou
128. ifier MA220 e RCA unbalanced with input impedance gt 30 kOhm e Built in condenser microphone for polarity testing delay measurements and voice note recording e Built in speaker e Headphone connector 3 5 mm Minijack Stereo USB mini connector for data transfer to PC XL2 Projector and or charging of Li Po battery Connection interface to accessories e XL2 Input Keypad e Digital I O Adapter Box e Digital I O Adapter PCB 24 bit linear PCM audio signal output prepared for later firmware extension Power Supply Memory INTi AUDIO SD Card included 8 GByte removable storing measurement data in ASCII format screen shots voice notes and wav files Data logging every second offers following noise monitoring periods e Logging default noise levels gt 2 years e Additional logging of 1 3 octave data gt 6 month e Additional compressed audio recording gt 1 week linear audio recording gt 15 hours Optional 32 GB SD Cards are available for longer monitoring requirements e Rechargeable Li Po battery included Type 3 7 V 2260 mAh Typical battery lifetime gt 4 hours Range 3 3 4 5 VDC e Dry cell batteries type AA 4 x 1 5 V Typical battery lifetime gt 4 hours Range 3 7 6 0 VDC e Linear external power supply 9 VDC Range 75 20 0 VDC minimum 6 Watt Charges Li Po battery during operation e USB Power Supply 225 INTi AUDIO General Clock Calibration Mechan
129. igh resolution Zoom FFT with select able frequency ranges and resolution up to 0 4 Hz in the range of 5 Hz to 20 kHz e Optional Capture and tolerance function with mul tiple readings for comparative measurements and passed failed analysis Noise Curves e 1 1 octave bands results from 63 Hz 8 kHz based on T20 and T30 e Optional 1 3 octave bands results from 50 Hz 10 kHz based on T20 and T30 e Range 10 ms 14 seconds e Measurement in accordance with ISO 3382 using Schroedermethod e Test signal Impulse source or interrupted pink noise generated by the MR PRO MR2 or the in cluded NTi Audio Test CD e Propagation delay between electrical reference signal and acoustic signal using the internal micro phone e Range 0 ms 1 second 0 m 344 m e Resolution 0 1 ms e Test signal NTi Audio delay test signal generated by the MR PRO MR2 or the included NTi Audio Test CD 1 12 Octave Analysis optional INTi AUDIO e Checks polarity of speakers and line signals e Positive Negative detection of wideband and individual 1 1 octave bands through internal micro phone or XLR RCA connector e Test signal NTi Audio polarity test signal gener ated by the MR PRO MR2 or the included NTi Audio Test CD e Noise Rating NR in accordance with ISO 1996 e Noise Criteria NC in accordance with ANSI 12 2 2008 and 1995 e Room Noise Criteria RNC in accordance with ANSI 12 2 2008 e Room Criteria RC in accordance with AN
130. ing a NTi Audio measurement mi crophone with electronic data sheet dBu Input level in dBu dBV Input level in dBV V Input level in Volt 32 The low indicator for an individual level lt is displayed when e he measured sound pressure level is below the selected linear measurement range In this case the results shown are most likely higher than the actual sound pressure level gt choose the next lower measurement range e The measured sound pressure level is just above the resid ual noise of the connected NTi Audio measurement micro phone which reduces the measurement accuracy gt choose another microphone dedicated for low level measurements Meee et LA OG ast 13 24 g lt 52 1dB LAeq i 52 2 dB LEFKE b4 qE TM SET lt 40 RHGE 240 Ment aae8a 3 In case the measurement result exceeds the preset measure ment range then limit arrows d amp d amp indicate this overload condi tion The arrows amp are displayed for minimum 1 seconds and as long as the overload exists Furthermore the once exceeded measurement range triggers the OVR indication in the bottom line which remains displayed for the complete measurement period These exceeded range indications are reset at starting a new measurement Possible causes for exceeding measurement ranges are e The measured sound pressure level exceeds the pre set measurement range during the measurement period Once this happens the OVR indication rema
131. ins displayed for the complete measurement period gt select the next higher measurement range or reduce the input signal level as ap plicable e The input level is near the maximum level of the connected NTi Audio measurement microphone Sound Level Meter Meee es LA OG ast 13 24 g 4444 dB LAeq A Ts m LcPeak YY YY B MU RE g SET m 2 ot 10 ANGE 210 cT oon in SLHeter FAB SLAR Gl ast 13 24 S Lerma dE i3 OCT as LAFliwe Laadi 1 88kHz BO 40 20 alll 5 3 20 250 ank M OVR gg SET 10 RHGE 110 CHT as INTi AUDIO 33 INTi Sound Level Meter AUDIO The XL2 reads the electronic data sheet of any connected ASD microphones provided by NTi Audio and switches the 48V phantom power automatically on as follows e Connect the measurement microphone to the XL2 e Switch on the XL2 e Position the XL2 at the measurement location using a micro phone stand or a tripod e Select the SLMeter function in the measurement menu and toggle with page to the numeric result page zs All wideband and RIA levels are measured and logged simultaneously You select which sound levels should be displayed 34 This example describes the setting of the commonly used ac tual sound pressure level Lar frequency weighting A time weighting F e Select the first parameter setting with the rotary wheel Confirm with enter SLMeter 123 LAR E lt ast 13 24 S 40 3dB Lied aaa
132. ion ASD is connect ed The XL2 reads the electronic data sheet of the microphone and switches the 48V phan tom power automatically on Phantom power is switched off Read out data from the connected microphone LZF Default setting LHP100F Suppressing any low frequency noise for Select RUN and press enter to start the sensitivity setting example wind during outdoor calibrations using an external calibrator 140 The reference calibration level is 114 dB The XL2 Supports a level setting between 0 dB and 200 GB Factory sensitivity of measurement microphone in mvV Pa The sensor detection of the XL2 reads the sensi tivity automatically from the electronic datasheet of the connected NTi Audio measurement microphone or micro phone pre amplitier Using the outdoor measurement microphone M2230 VWP with horizontal noise incidents requires to apply a spectral correction Off No spectral correction Com Activates the spectral correction for horizontal munity noise incidents using the outdoor measure hori ment microphone M2230 WP The correction zontal data is listed in chapter Technical Data Aircraft No spectral correction The M2230 WP com verti plies with the class 1 specifications at vertical cal noise incidents Usersensitivity setting for measurement microphones with an external calibrator e Turn the rotary wheel k to select the parameter Calibration Level 4 and press enter e Set the calib
133. ion certificates for new products are optional NTi Audio recommends annual calibration of the products af ter the purchase The calibration provides documented and traceable measurement accuracy and confirms that your NTi Audio product meets or exceeds the published specifica tions The calibration and adjustment procedures follow the documentation and traceability requirements of the standard EN ISO IEC 17025 For calibrations kindly follow the service guidelines at www nti audio com service If your product is not functioning correctly or is damaged please contact the local NTi Audio partner for assistance If the product needs to be returned for service kindly follow the service guidelines at www nti audio com service e The protective shock jacket shields the instru ment against reasonable impacts that could occur in normal use Do not Intentionally subject the instrument to extreme stress Please do not drop the instrument Damage caused by dropping or impact Is not covered by warranty Do not use the Instrument in damp environ ments The instrument can be permanently damaged if exposed to moisture INTi AUDIO CE We the manufacturer NTi Audio AG do hereby declare that the XL2 Analyzer the measurement microphones M2230 M2211 M2215 M4260 the preamplifier MA220 and acces sories comply with the following standards or other standard documents e EMC 2004 108 EG e Harmonized standards EN 61326 1 e
134. irat For further visual indication the limit button illuminates spnnge stance aco acueer green for POSITIVE and red for NEGATIVE polarity Measures the absolute level of the input signal The unit s dBu dBV and V are selectable 87 INT Polarity AUDIO 4 1 Indication of the audio signal balance between pin 2 and 3 on the XLR input for input signals gt 34 dBu The input signal is balanced E The signal is unbalanced The level of pin 2 is higher than pin 3 The signal is unbalanced The level of pin 3 is higher than pin 2 The grey area shows the measured signal energy within the individual frequency bands The bands with the biggest energy have the most effect on the actual displayed POSI TIVE NEGATIVE polarity result Polarity of frequency band is positive The polarity re sult is in the upper display area the area Polarity of frequency band is negative The polarity result is in the lower display area the area 88 Seven octave bands with center frequencies from 125 Hz to 8 kHz SUB displays the polarity of Sub wootfers frequency range lt 100 Hz Measurement results area with negative polarity The black line in the middle of relative level indicator 5 displays the measured polarity of the individual frequency band The dashed line indicates the lower limit of the measurement result area Polarity results for frequency bands in this area are uncer tain Therefore the polarity r
135. ise ratio 133 INT Audio Analyzer AUDIO The XL2 offers a comprehensive audio analyzer Broadband or wideband measurements are offered by the measurement functions RMS THD N and Oscilloscope The following measurement functions offer detailed analysis of the audio spectrum in Volt dBu and dBV e SLMeter RTA e FFT e 1 12 Oct Tol optional Just change the measurement unit according your require ments See the individual chapters for more details In case an NTi Audio measurement microphone with electronic data sheet is connected then the XL2 will automatically activate the measure ment unit GBSPL dB for sound level measure ments 134 The XL2 Audio and Acoustic Analyzer measures the parame ters Level RMS THD N and frequency simultaneously RMS THO LR E 13 46 S 2 6 5 D as W EKSH TINS 2 LYLRHS 18 0dBu 3 THOH 93 7dB TRER 100 001 Hz Z Weighting A Weighting C Weighting HP 100Hz HP 400Hz HP 19k 22 4 22 4k Frequency Z weighting with flat frequen cy response from 20 Hz to 22 kHz De fault measurement setting Frequency A weighting according IEC61672 for low noise levels Frequency C weighting according IEC61672 for high noise levels Highpass 100 Hz 200 dB dec maximally flat magnitude filter e g 60 dB 50 Hz Highpass 400 Hz 120 dB dec maxi mally flat magnitude filter attenuates 50 60Hz components of test signal Highpass 19 kHz e g to mea
136. lect the user profile in the folder Profile http my nti audio com For details see the e Manually change the ending of the user pro chapter My NTi Audio file from xxx prfl to xxx prfs e Disconnect the XL2 from the PC For detailed settings of factory default profiles e Import the profiles from the SD Card please see the Appendix 2 in this manual Power off on the XL2 Analyzer User User profiles are profiles generated by you on profiles the XL2 Analyzer 148 Sample filename MyProfile prfl Capture Tolerances INTI AUDIO e Select the Capture amp Start Tolerance Mode symbol for cap turing the measurement result The Spectral Limits Option extends the function range of the XL2 with trace capturing relative curve display and compre iriz Oct LAR E 4 ast iian g hensive tolerance handling for the FFT Analysis and the high EQ 75 2 dB ivi OCT resolution 1 12 Oct Tol spectral analysis Live CT bde 1i15 8Hz Features e Capturing of multiple readings into the internal memory e Comparing measurement results against captures with rela tive or absolute curve display e Comprehensive tolerance handling e Creating tolerance masks based on captures for passed failed measurements ib E e250 ik 4k 16k Ae MINNI GET 40 BAG ido Cols E ARAD CiT AT a e Confirm with enter 149 INTi Capture Tolerances AUDIO iri Oct aol ASD 11 30 S iz Oct LA asp 11 30 S y 1
137. lower correlation values The correlation factor is typically 80 100 Readout of cycle reverberation time and correlation factor 19 when selection 18 is CYC xx or Last Correlation Factor Scale is on the right Y axis For more details see 19 Els Reverberation time measurement result of individ ual displayed cycle Scale is on the left Y axis The right Yaxis shows the correlation factor in The cor relation factor Y axis is displayed when test result selection 18 is CYC xx or Last Individual cycle results may be deleted thereby excluding them from the calculation of the AVRG result Use either an interrupted pink noise or an im pulse source as the test signal e Interrupted pink noise Precision measurements require an omni directional speaker with identical radiation characteristic in all directions Various inter rupted pink noise test signals with different on off times are offered by the NTi Audio Test CD included with the XL2 or the Minirator sig nal generator Minimum three measurement cycles shall be performed The XL2 averages thee readings automatically Impulse The trigger signal is an impulse source such as a Starter pistol starter clap or bursting bal loon Individual measurements or test se quences with repeated trigger signals can be carried out Play a pink noise signal through an omnidirectional speaker In the room under test The sound source should be played for a long enough ti
138. lts 4 amp 5 choose a smaller font for all results Follow the setting instructions for sound level result 1 Sound Level Meter INTi AUDIO The XL2 Analyzer provides three input ranges to accom modate the wide range of input signals The individual rang es are based on the microphone sensitivity setting in the calibration menu of the XL2 For example at a sensitivity S 20mV Pa the input ranges are e Lower range 10 110 dBSPL e Middle range 30 130 dBSPL e Upper range 50 150 dBSPL Select the lowest possible input range according to the maximum level expected during the measurement e g if the sound pressure will always be below 110 dBSPL then select the lowest input range 10 110 dBSPL The run indication shows the measurement status running paused or stopped Various measurement settings are locked during ongoing measurements such as changing the input ranging or the preset measurement time 27 INTi Sound Level Meter 28 AUDIO Counts actual measurement time in hrs min sec Supports time modes continuous single and synchronized repeat Clit applicable for standard measurements All values are recorded and monitored continu ously after starting a measurement with start Dal The actual measurement time is shown Automatically stops the measurement after the pre set measurement time e Set the required measurement time e Start the measurement gt m e All measurement results may be recall
139. me period to ensure that a balance between injected and absorbed acoustic energy has been reached For example the sound reflections should be given enough time to reach all reflective surfaces in the room As a rule of thumb ensure that the pink noise is played for at least the time period of the estimated RT60 test result If in doubt play the Minira tor MR PRO or the Test Signal CD as sound source for at least 5 seconds for each cycle Each time the source signal stops the XL2 recognizes this interruption triggers measures the decay time and calculates the reverberation time automatically Minimum three measurement cycles shall be performed Fire an impulse sound source in the room under test e g use a starter pistol starter clap or bursting balloon The XL2 mea sures the decay time and calculates the reverberation time au tomatically INTi AUDIO Reverberation Time RI60 The XL2 reads the electronic data sheet of any connected ASD microphones provided by NTi Audio and switches the 48V phantom power automatically on as follows e Connect the measurement microphone to the XL2 Switch on the XL2 e Position the XL2 at the measurement location using a micro phone stand or tripod e Select the RT60 function in the measurement menu and toggle with page to the run page RUN e Prepare the environment for the measurement For example mute all sound sources to establish silence 81 INTi Reverberation Time RI60 AUDI
140. measurement time e Set the required measurement time e Start the measurement gt m HA The cursor read out may be set manually to any frequency band or wide band level The read out re mains at the selected frequency e Select the frequency with the rotary wheel 10 Press enter Adjustment of preset measurement time for the timer e Select the frequency of interest mode single Confirm with enter 112 The speech interference level SIL result is shown at noise curve types NC 2008 and NC 1995 1 It is calculated by averaging the octave band sound pressure levels at 500 Hz 1000 Hz 2000 Hz and 4000 Hz If the measured spec trum in any octave band does not exceed any of the octave bands of that NC SIL curve the spectrum is designated NC SIL If one or more octave band levels exceed the NC SIL curve then the NC curve number may differ to the SIL value as the NC rating for that spectrum must be de termined using the tangency method This reports any large fluctuations at low frequencies for the Room Noise Criteria RNC in accordance with ANSI 12 2 2008 If one or more displayed measurement results exceed the limits then large fluctuations exist Con cluding the LEQ levels in the octave frequency bands be low 300 Hz are automatically penalized at the RNC mea surement The noise curve type RNC uses these correction values based on the measured fluctuation results to determine the RNC curve result
141. mp For details refer to the chapter Limits This page provides a wizard to measure correction values which could be helpful for compliant sound level monitoring of live events It measures the correction values between the actual measurement position and the loudest posi tion accessible by the audience The XL2 displays and logs the selected sound pressure levels including the correction values allowing the sound engineer to monitor the sound level at the loudest position in the audience The measure ment meets the requirements of the standards DIN15905 5 Sound Level Meter INTi AUDIO This page allows setting the following levels e Moving Time average Sound Level Gliding LAeg with selectable time window from five seconds to one hour Four individual levels can be configured e Percentile Sound Level Allows the individual configuration of seven statistic lev els from 0 1 to 99 9 optional with Extended Acoustic Pack The Broadband Source for the calculation of the level sta tistics can be chosen from a set of different levels with either a frequency weighting A C or Z The time weight ings F S and the moving time averaged sound level for one second are supported 25 INTi Sound Level Meter AUDIO The numeric result page 123 SLMeter displays the selected broadband sound level results You can change the font size of the result Depending on the font size chosen the XL2 shows three or five results simultaneously
142. mp Start Tolerance Mode symbol with the rotary wheel ifl2 Oct LA Bi ast 13 51 S EQ 94 3dB 1 12 OCT i iz Oct LR Gl ast i243 a Live a7 8dB 2 180kHz ee dB 1 12 OCT als Liwe Ret 28 0 dEr 2 38A KHz 40 eo l T 16 E 250 Lik UL 16k Z an mn SET iE E63 250 ik 4k iBkAZ uo BAe do Teds Mean Mn get aeeeenae ao ANGE 140 C815 MO cnrageagses e Confirm with enter All levels differences relative levels are dis played in the unit dBr i iz Oct sA Capture E th Capture Liwe Manage captures 100 HO BO 40 20 16 E 250 ik UVUNUINIII 40 EHGe iuo Teis E e Select Start tolerance mode e Confirm with enter Capture Tolerances C LOAD FROH h CEES 100 j T Bo BO 40 20 40 BHGE i40 T EHEJ Hoke tolerance from S0 CARD 2011 05 04 13 51 l2 OUT Leh kHz SEI eee AR ts INTi AUDIO e Select Ref to load the earlier captured reference spectrum e Confirm with enter You may press the page button to toggle between the date and spectral resolution data of the capture 153 INTi Capture Tolerances AUDIO The passed failed condition is further visualized by the bicolor limit button and forwarded to the I O interface of the instru ment in order to drive an external alarm device such the acces sory SPL Stack Light iiz Oct LA EI 34 5 dE Ref 1h AdBt E FASS ED
143. n 0 00 05 LAeq_dt 62 2 dB Project Result Start 17 Jan 11 52 48 End 17 Jan 12 17 48 Duration 0 25 00 LAFmax 78 2 dB f 1000 Hz LZeq 56 0 dB 20 63 250 1K 4K Start 2014 01 17 11 52 50 End 2014 01 17 12 17 50 Samples 301 15 000 187 INTi AUDIO XL2 Projector The XL2 Projector displays the XL2 screen in real time on your PC when connected by USB The software toolbar en ables control of the XL2 Audio and Acoustic Analyzer with the mouse and keyboard XL2 Projector software is a free down load for all registered XL2 customers on the support website at http my nti audio com The XL2 Projector background color synchronizes with the XL2 limit button color The XL2 Projector uses the USB connection in COM port mode 188 Installation instruction e Disconnect the XL2 Analyzer from the PC e Register your XL2 and download the XL2 Projector software from the XL2 Support Page on htto my nti audio com e Unzip the file XL2 Projector Setup Vxx zip on your PC e Start the software installation and follow the instructions including driver installation e Start the XL2 Projector software e Start the XL2 Analyzer and connect it to the PC SLMeter 123 LAR Gl ast 17 01 S 3 LAF TT 30 PHGE 130 E XL2 Projector INT AUDIO o e Select COM port on the XL2 Microsoft Windows may rec 7 ognize the new hardware automatically and start the hard cord t gt esc gt
144. n Time RI60 INTi AUDIO Various error indications are displayed for unsuccessful RT60 measurements Corrupt cycles can be deleted individually These results are then excluded trom the average calcula tions e LOW LEVL This is the abbreviation of low test signal level during the measurement Increase the test signal level until the black level markers exceed the grey level markers in every fre quency band Also ensure that the level falls below the grey level markers otherwise use a RI60 test signal with longer on off times e T gt 18S The measured reverberation time exceeds the time limit of 18 seconds This is commonly caused by either an incorrect analyzer range setting or environmental noise In the first case choose another range setting In the second case en sure that the environmental noise remains constant during the measurement and or SET the level markers again while the environmental noise is high 85 INT Polarity AUDIO Polarity measurement Is important in matching the left and right speakers for a good stereo sound image The polarity function measures the polarity of cables single speakers and speaker cabinets For testing use the polarity signal provided on the NTi Audio Test CD or the Minirator test signal generator The polarity of individual speakers or speaker cabinets might change with the frequency For example the mid range speak er polarity may differ from the woofer polarity within the
145. n the run indication may display A for a preset auto Adjustment of preset measurement time for single timer mated level trigger setting 67 INT FFT Analysis Tolerance AUDIO 10 You may select any frequency to read out individual levels The selected frequency is indicated by the cursor arrow Choose between the following settings H he cursor follows automatically the highest level e g tracing feedback frequencies at live sound e Select the frequency with the rotary wheel Press enter e You may readout any individual frequency e Return to auto frequency with enter 43 The cursor read out may be set manually to any fre quency The read out remains at the selected fre quency e Select the frequency with the rotary wheel Press enter e Select the frequency of interest Confirm with enter 68 optional applicable with the Extended Acoustic Pack or the Spectral Limits Option e Select the readout frequency 10 and press enter e The zoom mode is displayed above the flashing arrow e Select the zoom in frequency with the rotary wheel e Press limit W and zoom the linear frequency scale in or out with the rotary wheel e Release limit W and scroll the linear frequency scale left or right with the rotary wheel 48V The XL2 provides 48 V phantom power supply to the connection microphone or sensor ASD An NTi Audio measurement microphone with automated sens
146. nal as only limited time shifts 20 ppm ensure reliable test results Pitch control and shock protec tion should be disabled We recommend that only profes sional CD Players be used Verify the time shift of the CD Player with a 1 kHz test signal e Insert the NTi Audio Test CD into the CD Player and start track 1 which is the 1 kHz test signal e Connect the XL2 directly to the audio output and mea sure the signal frequency in RMS THD N mode The dis played frequency should be in the range from 0 99998 kHz to 1 00002 kHz STIPA test signals from other test system manufacturers may sound similar but are not compatible Only the NTi Au dio STIPA test signal CD V1 1 or higher should be used in combination with the XL2 STIPA INTI AUDIO e Select typical locations based upon such regulations or typi cally position the microphone at 1 1 2 meters above ground in sitting areas or 1 5 1 8 meters in standing areas typical positions are not directly in front of the speakers e The person taking the measurements should be out of the acoustic field so as not to affect the measurement results For this purpose the measurement microphone can be mounted on a microphone stand and connected with the ASD Cable to the XL2 e Low speech intelligibility readings can be caused by e Excessive sound reverberation echoes or reflections e Poor speaker directivity or speaker coverage e Speaker level setting incorrect e g low signal to no
147. namic measurement range of 35 dB above the ambient noise level for each frequen cy band T30 requires a dynamic measurement range of 45 dB 77 INTi Reverberation Time RI60 78 AUDIO Reverberation time measurement selectable in 1 3 oc tave or 1 1 octave band resolution The optional Extended Acoustic Pack enables 1 3 octave band resolution from 50 Hz to 10 KHz 48V The XL2 provides 48 V phantom power supply to the connection microphone or sensor ASD An NTi Audio measurement microphone with automated sensor detection ASD is connect ed The XL2 reads the electronic data sheet of the microphone and switches the 48V phan tom power automatically on Phantom power is switched off 12 Select between the RT60 run test page and the result page The page button toggles between these displays RT60 run test page RT60 result page Toggle with the measurement result selection 18 among AVRG RT60 result page showing average of all cycles and uncertainty factor CYC xx RI60 result page for each cycle Last RT60 result page for last cycle 14 Reverberation time in seconds The scaling is automatically adjusted The uncertainty factor is displayed in the RI60 average re sult page It indicates the uncertainty of the averaged mea surement results reduces as more cycles are measured and depends on the measured reverberation time and the bandwidth of the individual frequency band lower bands show a higher uncertainty fact
148. ncies The peak hold time is set to 3 seconds LAegg tkl 8 G s iB L7Flive Actual real time spectra E Lae 98 5dqdB LAFmox ki 116 7 qE e Select the page KSET with the rotary wheel amp i e Measure the correction value k1 as described in the chapter lll SET Sei see 6 caer rcs 7 Fare Coracthon value 5 S0 PHGE 150 b i AMADE eee ee k2 is not required e Press the start button Da e The icon LOG flashes during the ongoing measurement In These levels are shown in the numeric result page the case where the profile SLV 100dB amp Audio has been LAeq5 k1 Time averaged sound pressure level LAeg selected the icon AUD flashes indicating the additional au with correction value k1 and a moving time dio wav file logging window of 5 seconds e During the measurement you can monitor the actual sound L k1 Time averaged sound pressure level L level LAegs tk in order to remain below the permitted lim Aeq60 Aeq its alternatively you may monitor the spectrum analyzer for with correction value k1 and a moving time A E E E T window of 60 minutes l e Press stop ba to finish the measurement LAFmaxtk1 Maximum sound pressure level LAFmax with correction value k1 243 INTi 244 AUDIO Appendix In accordance with SLV all sound levels are measured displayed and logged to SD Card automatically The settings are locked which ensures that the correct parameters are mea sured The profile SLV 100dB amp Audio
149. nd of the microphone is in line with the bottom end of the upper body tube Align the fixing screw hole of the upper body tube with the lower screw of the M2230 measurement microphone remove the fixing screw to see the lower screw head through the fixing screw hole 196 Attaching the fixing screw of the upper body tube onto the lower screw of the M2230 measurement microphone ensures that the microphone housing is not scratched e Insert and gently tighten the fixing screw while jiggling the microphone You will feel the fixing screw center in the head of the lower screw of the microphone Do not over tighten the fixing screw e Again verity that the bottom end of the inserted M2230 mi crophone is in line with the bottom end of the upper body tube Microphones INTi AUDIO Assemble the Weather Protection Body Mount the Top Section e Retract the ASD cable through the lower body tube and The top section of the WP30 weather protection kit consists screw the lower body tube to the upper tube ensuring that of the wind screen the enclosed protection cage with water the cable does not twist during this operation repellent membrane and the bird spike Gently slide the top section over the microphone tip and on to the upper body tube You will feel a slight increase in resistance approxi mately 3 mm before the top section s final position Slightly increase the pressure until the top section snaps into the final position with an
150. ndication should display the stop symbol gy SLMeter lt HLA Gl Ast 13 24 S e Sel h L3F FREG WEIGHTING OCT Select the LZF value with the rotary wheel amp 9 ie Le ae SLMeter lt LA Bd Ast 13 24 S Enges dE 1 3 OCT Hi BDO BO a Beale SB 6dB SHBH2 40 o ET BDO 250 ik UL PO Age HH il mn e 10 RHGE 110 Topog eo Bo 250 ik UL PO Ae e Confirm with enter AUIEIEUIINITIII SET esisajas i10 RHGE 110 E CMT Cara ee a He n e Press start PE to measure and display the sound levels results indicated with e Confirm with enter 40 Sound Level Meter INTi AUDIO e Select the parameter shown to the right of the upper LZF value with the rotary wheel kJ e g max e Press enter e Select the required time weighting e g LF Fast TTT e Select the parameter max SLMeter alt LA Bl aso 13 24 g ea FRED HEIGHTING a SLMeter hihi ALA El asp 13 24 a als a gt LF rox FARAHETER CT BD TIHE WEIGHTING me L2F live uve BEA nin 42 Gals 7 zz 40 40 e0 e0 na 250 PO Ae qo ITITI g Io S AG a ee 10 ANGE 110 Ciro 08 HE UUNATUTAUUATATNTIT SET 10 HGE 120 Cit EH EE e Confirm with enter e Confirm with enter e Follow the same instruction and select the lower RTA pa rameter live 41 INTi Sound Level Meter AUDIO Select the lowest possible input range according to the maxi mum l
151. nfirm SAVE with enter 174 SLMeter 123 KLAE M LAF max GE 110 ASD 13 24 qi FOLDER MEH DIR HFroject m Haning Sowing manual Soave Test Load Test COLLECT RESULTS IN one FILE Start Append Mode fF 2322S HETTE FREE OULD HRITE CACHE EHFTY SET cnt 00 00 30 eo and You may configure the XL2 to store results automatically to the SD Card upon completion of the measurement by applying the Naming Saving auto function This is particularly useful for longer measurements such as sound level monitoring spanning several hours The default file name is the actual date e Select Naming Saving in the memory menu and press en ter to confirm Naming Saving auto LAeq LAF max SLMeter 123 8LAl LLELLU il PHGE 12 ASD 13 24 S FOLDER MEH DIR HFroject Haminaga Souina 5gave Screenshot Logd Test COLLECT RESULTS IMN one FILE Start Append Mode E 2322S HEYTE FREE WRITE i 5 CACHE EHFTY OULD SET caT sae ro Re Le iT If the battery runs empty while you are measur ing with logging and or repeated reporting en abled the XL2 creates the folder RESTORE_AF TER_POWERFAIL and stores the measurement data up until the switch off time The next time you switch on the XL2 the following window informs you that this data exists Click OK Restore Data Incomplete Data sawed in folder RES TORE_AF TER_ POMERFAIL Initializing Th
152. ng Leq The RTA Leq level is stored in the report 44 Leq Lmax The RTA Leq Lmin Lmax levels are stored Lmin in the report All AIl RTA levels are stored in the report Choose between the following result reporting ALL Records all available sound pressure levels without correction values Selected Records a subset of up to 10 different levels including correction values if you require e Select Report Values with the rotary wheel e Press enter to toggle between All or Selected e By setting Selected at 2 up to 10 individual report val ues can be chosen Select the first value Lxx with the rotary wheel amp 3 and press enter e Select the reporting level with the rotary wheel and confirm with enter The XL2 features a powerful sound level meter data logger which allows you to record all required sound level values dur ing the selected period of time All results are logged onto the SD Card The measurement results can be loaded to a PC for documentation and visualization The LOG menu offers the de tailed setup of the log report Sauna Lod LA E i ast 10 55 g 1 Logging On 2 Interssal dt OMe a 3 Add Spectra Ho A Log Audio On 5 Format Compressed AGl 6 Log values Selected tare r 1 LAF max e LAF iin i 4 LCP Kmax H 4 g Sound Level Meter INTi AUDIO Select Logging with the rotary wheel and press enter to enable the automated logging of te
153. ngs INTI AUDIO The XL2 Analyzer offers automated scheduled measurements without any human interaction You may schedule a measure ment for one or multiple days e Selects the preset measurement function e Standby until start time e Starts measurement at start time e Stops measurement after the preset measurement duration e Stores measurement data to SD Card no reconfirmation re quired e Stops schedule or standby until next start time Supported measurement functions e SLMeter RIA e FFT Tol e RT60 e 1 12 Oct Tol e STIPA 165 INTI System Settings 166 AUDIO Select the measurement functions for the scheduled mea surements Set the date for the scheduled measurement s e Select Start with the rotary wheel Confirm with enter e Set the date with the rotary wheel e Confirm each setting with enter Set the time for the scheduled measurement e Select the T symbol to the right of the date Confirm with enter e Set the time with the rotary wheel e Confirm each setting with enter Set the duration of the scheduled measurement s Off Schedules a single measurement On Schedules a measurement sequence with the same start and end time for the selected days Select the week days for the recurrence Set the number of occurrences of the scheduled measure ment Each single measurement is one occurrence Starts the scheduled measurement s Scheduler Imal ASD 14
154. not mandatory e Defines the tolerance band for the individual frequencies e The ideal parameter can be set as undef e The same frequency value on two succes sive rows defines a tolerance step e g Frequency Min Ideal Max 100 70 75 80 500 70 75 80 500 75 80 90 1000 15 80 90 All levels in the tolerance file are relative levels dBr Thus the level offset provides the relation between the relative level and actual sound pressure level not mandatory The XL2 allows setting of the level offset inde pendently of the tolerance file Capture Tolerances INTi AUDIO Hide This parameter defines which tolerance fre FreqScale Defines the frequency scale spacing in the X UnusedBands quency range is shown not mandatory Spacing axis for the tolerance data not mandatory True Measurement results of fre lin Tolerance data displayed with quency bands without any linear frequency spacing e g specified tolerance are not dis used in the FFT function de played fault setting False The measurement result of all log Tolerance data displayed with frequency bands are shown logarithmic frequency spacing e g used in the 1 12 Oct Tol nAllowed Allows a PASSED result with a maximum function Violations number of n failed frequency bands not man datory AutoStart Enables auto start function not mandatory True Auto start is active The run indi cation displays A The measure ment starts automatically after the trigg
155. o 10 different individually defined sound pressure levels For details refer to the chapter Reporting 23 INTi Sound Level Meter AUDIO The XL2 features a powerful sound level meter data logger which allows you to record all required sound level values dur ing the measurement In the logging page you set which sound pressure levels shall be logged over time For details refer to ALL Logs all sound pressure levels Selected Logs up to 10 different individually defined sound pressure levels The event function is available with the optional Extended Acoustic Pack The XL2 event feature offers the following func tionalities e Automated event triggered at noise levels above below a preset value including setting markers for specific noise cat egories Application example Recording the noise level for LAF gt 80 cB e Event triggered by external key press of the XL2 Input Key pad You can utilize four keys 1 4 to categorize any noise of interest or noise to be later excluded in the post processing A typical application is categorizing any annoying industrial noise by persons living in the neighborhood 24 Here you set the function of the limit LED ri thereby highlight ing any sound level that exceeds the pre set limits in orange or red color Further external peripherals are controlled by the optional Serial I O Interface based on the sound level such as displaying sound levels on a large external red orange green la
156. od determines the MTF by analyzing the seven frequency bands Each band is modulated with two frequencies resulting in the modula tion ratio mr1 and mr2 All indexes together combined with osycho acoustic models provide the single value speech intelligibility result The built in error detection helps identifying faulty measure ments caused by the amount of impulsive ambient noise Such noise influences the accuracy of any speech intelligi bility measurement The error detection checks the follow Ing e nvalid modulation indices in individual octave bands mr1 or mr2 gt 1 3 e Changes in ambient noise or any impulsive noise dur ing the measurement by comparing the first half of the measurement period with the second half The standard IEC 60268 16 recommends measuring the speech intelligibility two or three times at each measure ment position This reduces potential measurement errors The individual cycle readings are listed here Calculated average of the recorded cycle results Standard deviation of the of the recorded cycle results Start the next cycle measurement at the same measure ment position here Measure here the actual ambient noise during an adjust able measurement time You may save this record and re load the data set for any later speech intelligibility measure ment 20 21 22 23 24 Informs about the source of the ambient noise data the possibilities are e Default Settings e E
157. oing measure ments thus a functioning SD Card has to be inserted at all times Error Messages Actions to do Missing SD Card Insert the SD Card Format the SD Card on the PC Follow the instructions at Formatting the SC Card in this chapter SD Card is not FAT formatted The memory of the SD Card is full Download all data to the PC and emp ty the SD Card SD Card is full gt on Display In case any other error message is shown on the XL2 display then kindly report the full error message back to NTi Audio Your feedback supports the developments of the instrument Thank you 202 Stored Data or Wav files not available The file system might be corrupted e On the PC right click on the NTi Audio XL2 drive select Properties and click Check Now as shown below e Thereafter all stored data should be available again NTi Audio XL2 E Properties General AutoPlay Tools Hardware sharing Error checking This option will check the volume for errors Check Now Defragmentation amp This option will defragment files on the volume a Defragment Mow Backup ae This option will back up files on the volume te Further Information INTi AUDIO You will find information about the installed firmware ver sion in the systems settings of the instrument The firm Start the XL2 and connect it to the PC ware revision history is list
158. om noise or other environments Various stan dardized international noise curves are the most widely used means for evaluating background sound in buildings and other facilities such as transit facilities as well as in other indoor outdoor spaces Residual noise in buildings may be generated from both environmental sources e g outside traffic and sys temic sources e g heating ventilating and airconditioning HVAC systems or other machinery in use It is also frequently necessary to measure residual noise curves prior to expected changes in advance of construction or prior to other expected environmental noise changes INTi AUDIO Noise Curves in accordance with ISO 1996 Noise rating NR is a graphical method for assigning a single number rating to a noise spectrum It can be used to specify the maximum acceptable level in each octave band of a fre quency spectrum or to assess the acceptability of a noise spectrum for a particular application The method was originally proposed for use in assessing environmental noise but it is now used frequently for describing noise from mechanical ven tilation systems in buildings To make a rating the measured noise spectrum is superimposed on a family of NR contours the NR of the spectrum corresponds to the value of the first NR contour that is entirely above the spectrum in accordance with ANSI S12 2 2008 and 1995 The NC rating of a spectrum is designated as the value of
159. or The number of measure ment cycles is displayed at 6 Readout of reverberation time and uncertainty factor Uncertainty factor For more details see 4 Reverberation time measurement results RI60 Octave Bands 63Hz 8 kHz Select the individual frequency band and read out the fol lowing numeric measurement results e Uncertainty factor in or correlation in e Reverberation time RI60 T20 of the selected frequen cy band in seconds s Reverberation Time RI60 INTi AUDIO The RT60 measurement function allows consecutive mea surements within one test sequence An averaged test re sult of all measurements is automatically calculated Select CYC and scroll with the rotary wheel amp through the individual test result cycles showing Last Displays the result of last measurement cycle XX The individual single test results are marked with CYC xx where xx is an incriminating num ber You may delete individual test results The averaged reverberation time result uses only the remaining valid measurements Io delete results in a cycle e Select DEL with the rotary wheel Confirm with enter AVRG The averaged test results of all cycles are calcu lated and displayed 79 INTi Reverberation Time RI60 20 21 22 80 AUDIO The correlation factor is 100 for perfectly linear sound pressure level decay after the sound source has ceased The natural deviation from this linearity results in
160. or detection ASD is connect ed The XL2 reads the electronic data sheet of the microphone and switches the 48V phan tom power automatically on Phantom power is switched off 13 Select the measurement unit as follows dB dBu dBV Sound level in dBSPL This measurement unit is permanently selected upon connecting a NTi Audio measurement mi crophone with electronic data sheet Input level in dBu Input level in dBV Input level in Volt FFT Analysis Tolerance 20k 1k7 200 Usr Set INTi AUDIO Shows FFT result of the frequency band range 484 38 Hz 20 453 kHz in a resolution of 140 62 Hz with 143 bins shown on the display Shows FFT result of the frequency band range 58 Hz 1 722 kHz in a resolution of 11 72 Hz with 143 bins shown on the display Shows FFT result of the frequency band range 7 Hz 215 01 Hz in a resolution of 1 46 Hz with 143 bins shown on the display User Range applicable with optional Extended Acoustic Pack or Spectral Limits Option 5 Hz 20 kHz in zoom mode with a minimum reso lution of 0 366 Hz and 143 bins displayed Selection for FFT Windowing e Hann Default for acoustic measurements e Dolph Chebyshev for analyzing small signals e g harmonics close to a dominant signal The page button switches these display modes 69 INTi FFT Analysis Tolerance AUDIO The XL2 displays two different sound pressure levels at the same time You configure to
161. ositive e Mid range Negative e Tweeter Positive with small levels The major part of the signal energy is measured in the mid range frequency bands Therefore the overall displayed polarity is NEGATIVE 89 INT Delay Time AUDIO The delay time measurement function is suitable for accurate configuration of delay line setups by optimizing the direction ality of the signal source The XL2 measures the delay time between the reference signal and the acoustic signal from the speaker The acoustic delay settings are displayed allowing you to easily set the measured delay time into the delay device in the rack The NTi Audio delay time test signal is provided either by the Minirator MR PRO MR2 or the Test CD included with the XL2 13 45 S Delay Signal J 1 cafe Mainirater Act Delo 5 aE 9 8ms lt L 3 GB 5ms Act RI ms 6 A Distance 0 20 ESEN 5 AOLUOODDDUDUIUUTUOUD TUTTUU TUUTUU IITTI 00 o0 Measure 90 Select the signal source for the delay measurement CD Player Using the supplied NTi Audio Test CD this setting implies the synchronization time bar is set to 100 seconds 1 min 40 sec after 100 seconds the XL2 has to be syn chronized to the delay test signal again Minirator The Minirator MR PRO and MR2 provides a more reliable test signal source than a CD player Therefore the XL2 offers an ex tended time range without synchronization Only after 300 seconds 5 minutes does the XL2 have to
162. preset value 2 for the start duration 3 on ext Events are triggered by external key press key press Set the level at which the triggered event is started 13 The event start is triggered when the noise level is higher or lower than the preset value and continues for the pre set duration Sound Level Meter INTi AUDIO Set the level at which the triggered event is stopped on level Stop level Start level 2 Hysteresis 14 above on level Stop level Start level 2 Hysteresis 14 below 12 The event stop is triggered when the noise level is lower or higher than the preset value and continues for the preset duration 14 Set the hysteresis to an appropriate value to prevent rapid switching on and off as the level drifts around the Start level Define the level type to be monitored 51 INTi Sound Level Meter AUDIO 5 The XL2 logs audio data as a wav tile Choose from the fol lowing settings Off Audio logging is off On Audio logging is activated from measurement start to stop Events Only Audio logging of triggered events only For more details read the chapter Wav File Recording 6 Choose from the following audio recording formats Compressed Compressed audio logging Compressed AGC Compressed audio logging with Automated Gain Control AGC 24Bit_48kHz Linear audio logging in 24 bit 48 kHz resolution Required for post processing on the PC with Extended Acoustic Pack 52
163. press enter e Select Save Profile and press enter SLMeter 123 LA E lt asp 13 24 SLMeter 123 LA El asp 20 34 S Hanage Profile Save Profile gue Profile FROFILE GAGNA SEARCH Delete Profile F MyProfile Export to S0 Cord_ dB Configure available screens Save Profile Allow Append Hode rea Allow manual ranging mea Lae E e e dB SAWE CAHCEL LAF max dB LAF max dB TT SET GOOG 10 III SET GOOG 10 40 AHGE 140 Eo opipi 40 RHGE 140 Eo opipi Each stored profile includes all settings of all e Select Rename and press enter measurement functions and pages Only the e Set the profile name to MyProfile The maximum name following details are not stored length is 20 characters e Calibration settings e System settings e Temperature unit e Phantom power on off 144 Profiles INT AUDIO e Select Configure available screens and press enter e Switch on the XL2 SLHeter 123 LAR Hl ast 20 39 S FROFILE RENAHE SEARCH MProftile Select Screens SLMeter 123 SLMeter Wnt EAT SLheter Rep e screens na SLMeter Log SLMeter Ewt jj LMeter Lim SLMeter Kset SLMeter Set Il 30 RHGE 120 Full mode D0IH15505 5 D0IH15505 5 amp Audio 5L 1H6dB i 5L 1AAdB amp Audio MvProtile e Select additional available pages measurement functions for the profile e g RTA atu e Press escape to return to the Save Profil
164. r At 100ms Logging is the log value selection limited to five different parameters Sound Level Meter INTi AUDIO Sample name of wav file MyTest_SLM_000_Audio_FS133 0dB PK _00 wav The XL2 records a wav file of the measured input signal and stores it on the SD Card The available formats are e Compressed default using ADPCM compression A new l 2 4 5 wav file is started automatically after 12 hours of recording typical maximum wav file size 512 MByte 1 e Compressed AGC compressed with automated gain con File name defined by user trol The gain control increases the level of low level signals so that the wav file is well leveled during playback on the 2 PG Measurement function e 24Bit_48kHz linear wav file logging in 24 bit 48kHz resolu tion with the optional Extended Acoustic Pack A new wav 3 file is started automatically after 1 hour of recording typical Automatically incrementing file number maximum wav file size 512 MByte Audio file with full scale peak level In case of a Com pressed AGC recording the file name reads AGC this file contains corrected level information only The XL2 stores date and time of the record ing within the wav file according to EBU TECH 5 3285 This information is available through For wav tile recording over longer periods the XL2 splits protessional audio video tools typically used in the audio data into individual wav files with about 500 MB broadcast
165. r result displayed as bargraph e Capture amp Start Tolerance Mode The displayed readings may be captured as reference reading C1 to C8 for e Comparing measurement results against captured traces with relative or absolute curve display e Creating tolerance masks based on captured refer ence curves for passed failed measurements Capture EQ Captures the upper parameter Capture Live Captures the lower parameter 65 INT FFT Analysis Tolerance AUDIO Manage Allows to rename captures clear re captures corded captures save captures to SD Card for export from the XL2 or load captures from SD Card for import to the XL2 Start tolerance Starts the tolerance mode for passed mode failed measurements comparing the actual measurement results against a tolerance band Actual level result of the indicated frequency band The cur sor readout displays the center frequency and the level of the band indicated by the arrow Upper parameter displayed as line uu Lower parameter displayed as bargraph 66 e Select the YAxis with the rotary wheel and confirm with enter e Select the zoom factor between 20 10 5 2 5 dB div and confirm with enter e Scroll up and down with the rotary wheel amp to select the Y axis range Confirm with enter Displays the actual and averaged measurement results The XL2 Analyzer provides three input ranges to accom modate the wide range of input signals The individual
166. rang es are based on the microphone sensitivity setting in the calibration menu of the XL2 For example at a sensitivity S 20mV Pa the input ranges are e Lower range 10 110 dBSPL e Middle range 30 130 dBSPL e Upper range 50 150 dBSPL Select the lowest possible input range according to the maximum level expected during the measurement e g if the sound pressure will be always below 110 dBSPL then select the lowest input range 10 110 dBSPL FFT Analysis Tolerance INTi AUDIO 8 A Offers selectable time weighting of 0 1 0 2 0 5 1 0 sec Counts actual measurement time in hrs min sec Supports ond as well FAST 125 ms and SLOW 1 second Applica setting of time modes continuous and single tions Clit Short Time High resolution in time with minimum applicable for standard measurements Weighting averaging All values are recorded and monitored continu ously after starting a measurement with start Dal Long Time Low resolution in time with longer aver The actual measurement time is shown Weighting aging Automatically stops the measurement after the The run indication shows the measurement status running pre set measurement time paused or stopped Various measurement settings are e Set the required measurement time locked during ongoing measurements such as changing e Start the measurement Da the Input ranging or the preset measurement time For passed failed measurements with the Spectral Limits 9 optio
167. ration level according to the calibrator used e Generate the specific reference signal with the calibrator onto the microphone e Turn the rotary wheel amp to select the parameter RUN next to User Calibration 3 and press enter e The pop up window Calibration Calibration running shows up and changes to Calibration Successfully fin ished for a successfully completed calibration Calibration INTi AUDIO In case no external calibration device is available set the sensi tivity of non NTi Audio microphones manually according to the product specifications as follows e Select Sensitivity 2 with the rotary wheel e Press enter and adjust the sensitivity with the rotary wheel in 0 1 mV Pa steps The setting range 100 uV Pa 9 99 V Pa is supported Confirm with enter The XL2 writes the usersensitivity setting onto the electronic data sheet of the connected NTI Audio measurement microphone or microphone preamplifier All subsequent measurements au tomatically utilize this usersensitivity 141 INTi Profiles AUDIO Profiles are templates of measurement setups You may define which profile is loaded at startup so that the measurements are carried out always with the same setup and instrument set tings A remarkable advantage of the XL2 is the flexible user inter face The measurement screens may be personalized and only a limited subset of the comprehensive functionality enabled to create simplifi
168. ress enter Y Volume dE DEOONT TONETOM B0 IdE 80 Fost Hotch e g using a 100 Hz sine test signal connected to the XL2 input with the 100 Hz main fre quency filtered by the notch filter the complete frequency spectrum is available at the speaker or headphone output This feature allows you to listen to the actual distortion signal You there fore hear a noise from the speaker even without any connected Inputs signal The scope function visualizes the waveform of the electrical in put signal It automatically triggers to the fundamental frequen cy and selects the scaling of the X axis time and Y axis level accordingly The fundamental or most dominant frequency of the input signals is displayed above the scope screen Scope LA E 13 45 S FREH 1 060533 kHz RUHHIHG emi Lr ea mE The scope scaling is fixed Audio Analyzer INTi AUDIO 137 INTi Calibration AUDIO The XL2 Audio and Acoustic Analyzer meets or exceeds the In order to maintain the high accuracy annual calibration of the XL2 Analyzer and the measurement microphone Is recom mended The calibration service verifies the complete product specifications differences to the last calibration and measures the frequency response of the measurement microphone To enquire about calibration service follow the RMA guide lines at www nti audio com NTi Audio s ASD measurement microphones and the micro phone pre amplifier MA220 in
169. same speaker cabinet Therefore the polarity detailed result page of the XL2 displays the measured polarity of the individual octave bands from 125 Hz to 8 kHz This allows in depth verification of the polarity frequency relationship e Polarity is a simple test within the very com plex science of signal phasing Drivers speak ers and crossovers all cause phase shifts of the audio signal e The polarity of various speakers within the same cabinet may differ by design e Polarity testing is useful for checking the cor rect wiring of similar soeaker systems 86 AGEL les E 13 59 S 1 Signal Source MLE Input 20 8d6u Folarits POSITIVE Use Hinirator Polarity Signal Polarity INTI AUDIO Select the signal source as follows e Select Signal Source with the rotary wheel Press enter to select either Voice Use the internal voice note microphone of the R nt Gl ast 13 24 a Note XL2 for polarity measurements This selection Mic disables the rear speaker _ E XLR Measure the acoustic polarity with a measure a 10 Input ment microphone Alternatively measure the H polarity of an electrical signal connected with 9 an XLR audio cable T a 8 l RCA Measure the polarity of an electrical signal con Input nected with an RCA audio cable SUE 425 250 S00 ik Zk 4k Bk 7 2 Displays either POSITIVE NEGATIVE or undefined Polarit It for Min
170. se curve type with the rotary wheel Q e Confirm with enter H Curve lt LA E ast 16 05 a HC 7HA8 Hz SIL I50 1996 E 16 6Hz JHoise Rating 40 ANSI Siz 2 2008 Hic 4o 0 Hoise Criteria Hic a5 Room Hoise Criteria Hc 30 20 ANSI 12 2 1995 Hees Holse Criteria Hc 20 io Room Criteria Mcis ASA 1911 O Pret Moise Criteria gy Live iew E SET Gating oa HOLD LIHIT KEY Ho The XL2 measures all noise curve types at the same time thus you can change the selection also after the measurement 115 INTi Noise Curves AUDIO e Press start gt m e Press stop Dam Tee LARUH ASD 15 53 S HC 2HAS 31 500 Hz7 SIL 253 Lzeq 4hdde 8 125H2 PP ihi sLAJRUH ASD 16 53 S Test gutosayved as i cee a E gt Project eq o i i E3 2615 81 22_H01SE_686 SO HOSS SF Record Voicenote Hc So un Hic4s He 4 Py i T i Gi i T i T i 30 Hc 35 iB 125 ik Bk Hc 30 Live lew SET Gotan sa 20 ees HOLD LIHIT KEY Eoo oponi E E E tung ey HE20 1E 125 ik Bk Live lew p at HHH oe HOLG LIHIT KEY HEHEHHE e Press enter to confirm The measurement data are stored on the SD Card in ASCII format 116 The STIPA analyzer option allows reliable measurement of the speech transmission index within 15 seconds Besides the single value STI or CIS test result a detailed view of the modulation indices and individual band level results is provid ed The STIPA analyzer meets the latest standard edition
171. st results On The XL2 logs measurement data every interval dt 2 Off No Logging Adjust the logging interval The optional Extended Acoustic Pack offers the additional 100 ms logging Select Yes to log additionally the RTA spectrum at each log ging Interval 45 INTi 46 Sound Level Meter AUDIO The XL2 logs audio data as a wav file Choose among the following settings Off Audio logging is off On Audio logging is activate from mea surement start to stop Events Only Audio logging of triggered events only For more details read the chapters Wav File Recording and im e e e e e ee Events Choose among the following audio recording settings Compressed Compressed audio logging Compressed AGC Compressed audio logging with automated gain control 24Bit_48kHz Linear audio logging in 24 bit 48 kHz resolution optional with Extended Acoustic Pack Choose between the following settings ALL Logs all available sound pressure levels with out correction values Selected Logs a subset of up to 10 different sound pressure levels including correction values if you require e Select Log Values with the rotary wheel e Press enter to toggle between All and Selected By setting Selected at 5 up to 10 individual log values can be chosen e Select the first value Lxx with the rotary wheel and press enter e Select the logging level with the rotary wheel 3 and con firm with ente
172. sults E he cursor follows automatically the highest level Broadband A A weighted level e g tracing feedback frequencies at live sound e Select the frequency with the rotary wheel Q Broadband C C weighted level Press enter e You may readout any individual frequency Broadband Z without any frequency weighting e Return to auto frequency with enter none Sum of bands Sum of displayed frequency bands HH you may select this by using a toler he cursor read out may be set manually to any ance band limited a specific frequency frequency band or wideband level The read out re range mains at the selected frequency e Select the frequency with the rotary wheel Press enter e Select the frequency of interest Confirm with enter 100 Set the spectral result display to 1 1 1 3 1 6 or 1 12 octave band resolution as follows e Turn the rotary wheel amp s to select the parameter 12 e Press enter to open the selection window e Turn the rotary wheel to select 1 1 OCT 1 3 OCT 1 6 OCT or 1 12 OCT e Press enter to confirm 48V The XL2 provides 48 V phantom power supply to the microphone or sensor ASD An NTi Audio measurement microphone with automated sensor detection ASD is connect ed The XL2 reads the electronic data sheet of the microphone and switches the 48V phan tom power automatically on Phantom power is switched off 1 12 Octave Tolerance INTi 14 AUDIO Select the
173. sure a 20 kHz pilot tone level of a public address system without disturbing the public Bandpass filter 22 4 Hz 22 4 kHz IEC 468 4 Audio Analyzer INTi AUDIO Measures the absolute level of the input signal The unit s dBu dBV V and dBSPL are selectable Measures the total harmonic distortion and noise of the input signal The distortion measurement expressed In dB linear or in is conducted within the bandwidth 10 Hz 20 KHz The XL2 automatically extracts and measures the frequen cy of the fundamental signal The XL2 frequency counter technology even reads the frequency correctly for heavily distorted signals Indication of the audio signal balance between pin 2 and 3 on the XLR Input for input signals gt 34 dBu p The input signal is balanced The signal is unbalanced The level at pin 2 is higher than at pin 3 The signal is unbalanced The level at pin 3 Is higher than at pin 2 135 INT Audio Analyzer AUDIO The input signal is audible at the rear speaker or headphone output e Press and hold down the speaker button AMS THO LA E 13 45 a 1 1 PLEN EKSH TINS LYLAHS Fa F Volume 6A EL B LI DANOONOOEN OTONI THO B0 OdE 80 Fre Hotch PREN 1 0000 kHz 136 The main frequency component is filtered out by a notch filter leaving only the remaining sig nal audible e Press the speaker button to display the vol ume window e Additionally p
174. tacenduetanatetctetates inrite 58 Locked RUN MOde ccccccceccceceseeceeeeeeeeseeeeeeaeeeseeeens 62 INTi Table of Contents 11 Data Management cccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeas 168 Record Voice Notes cccccecccseccsesceeeeeeeeceeseeeeeeeeenes 173 Recall M aSUreEMeNtS cccceccceeceeeeeeeeeeseeeeeeeeeees 179 Append Measurements ccccccececeeeeeeeeeeeeeeeneeens 181 12 XL2 Data Explorer optional 02 0sesseeeees 186 13 XL2 Projector Software cccccccssseeeseeeeeeseeeeeaees 188 14 Monitoring Network ccccccscccseeeeeeeeeeeeeeeeeeeeeeeas 190 15 Remote Measurement cccccseecsseeesseeeeeeesseeeeas 190 16 Microphones cccccescceeeeeeeeeeeeeeeeeaeeeeeeseeeeeeeanes 191 17 Further Information c ccceccseseeeeeeeeseeeeeeeeneeeeas 200 My NTI Audio 000 ec ccc eeccc ee ccceeeceeeeeeeeeeeeeeeeeeeeeean ees 200 WS and MPOUDIES MO OUING sasies aoan 201 Firmware Update cc ccccccccceeecceeeeeeeeeeee cess scene scenes 203 Options and ACCESSONES ccccaeivntvancawisuvaddaduneveswacesnanten 204 Warranty Conditions ccccccccccccccseecceeeseeeeeseceeaeeees 216 Calibration CMC ANC ea casecerenctivanareenaencianeimenetiecumancied 216 Service and Repairs ccc cece ccceeceee ee eeeeeeeeeeaeeeeenees 217 Declaration of Conformity aawedcneicusanhndanavensnodiyaeins 27 18 Technical Data
175. tdoor Response Frequency Microphone Class 1 Response M2230 WP30 Class 1 Omnidirectional pre polarized condenser free field microphone Frequency Response Class 1 Type 1 1 2 detachable with 6OUNS2 thread type WS2F according IEC 61094 4 MA220 1 dB 5 Hz 20 Hz 1 dB gt 20 Hz 4 kHz 1 5 dB gt 4 kHz 10 kHz 2 dB gt 10 kHz 16 kHz 3 dB gt 16 kHz 20 kHz 5 Hz 20 kHz 21 dB A 144 dBSPL Class 1 Type 1 Class 1 Type 1 Certified 16 dB A 1S9 GBSPL 25 dB A 153 dBSPL 27 5 dBV Pa 2 dB 42 mV Pa lt 0 01 dB C 34 dBV Pa 3 dB 42 dBV Pa 3 dB 20 mV Pa 8 mV Pa lt 40 015 08 C INTi AUDIO M4260 Class 2 Class 2 Type 2 1 4 permanently installed 1 4 5 dB 5 Hz 20 Hz 1 5 dB gt 20 Hz 4 kHz 3 dB gt 4 kHz 10 kHz 4 5 dB gt 10 kHz 16 kHz 5 dB gt 16 kHz 20 kHz 29 dB A 144 dBSPL 31 7 dBV Pa 3 dB 26 mV Pa lt 0 02 dB C 227 INTi AUDIO Temperature Range Pressure Coefficient Influence of Humidity non condensing Humidity Long Term Stability Electronic Data Sheet Output Impedance Power Supply Connector Diameter Dimensions Length Dimensions Weight Environmental protection NTi Audio 228 Specifications M2230 M2230 WP M2211 M2215 M4260 Class 1 Certified Class 1 Frequency High SPL Class 2 Outdoor Response Frequency Microphone Class 1 Response M2230 WP30 Class 1 10 C to 50
176. ternal Digital O Adapter This facilitates a quick response to sound levels that exceed The following limits apply at all areas accessible by the visitors these limits during the moving measurement period window of 60 minutes during the live event Meer Lim eLA E i ast 14 58 g Limit LED On e Maximum averaged level The XL2 displays this maximum level with the measurement Red eae result LAeq60 k1 Orange gt 35 8dB Type of Max level Requirements Green 95 0dE live event r Bow On STAT 23 3 100 dB Sound level recording LAeq5 k1 LAeg5 k1 Results to store for 30 days Dut 1 gt 99 0dE and gt 34 AdE Level warning to visitors Out 2 gt 35 6dB and 99 406 Hearing protection distributed Out 3 2 35 806 and 2 35 8dB Chill out zone lt 85 dB A Out 4 2 AdE and lt dE REEE 2 96 dB Sound level monitoring Level warning to visitors Hearing protection distributed You may import the log files into a report generator soft 1 93 dB Sound level monitoring ware based on MS Excel providing automatically completed live event reports with noise level charts The report genera tor software is a free download on the support website at http my nti audio com for all registered XL2 customers Maximum peak level LAFmax 125 dB 242 Appendix INT AUDIO The following sound levels are displayed in the real time ana SEOs Lec MURIAUD aso 15 27 g lyzer page L7Fhold3 For tracing of feedback freque
177. the M2230 WP fulfills the IEC 61672 class 1 as well as the ANSI S1 4 type 1 require ments for vertical sound incidence For compliance with hori zontal sound incidence a frequency compensation is employed in the associated XL2 Sound Level Meter The M2230 WP consists of an M2230 measurement micro phone enclosed in a WP30 weather protection kit 194 e Always activate the frequency correction filter in the XL2 when measuring a horizon tal sound incidence Sound source from the side with the M2230 WP The filter ensures that the measurements accuracy meets the requirements of IEC 61672 class 1 and ANSI 1 4 type 1 Deactivate the filter only if you are measur ing a vertical sound incidence Sound source from above e g airplane noise with the M2230 WP Do not use the M2230 WP in a horizontal po sition Raindrops may reach and damage the M2230 measurement microphone Microphones INT AUDIO This chapter describes how to assemble the M2230 Measure ment Microphone into the VWWP30 weather protection kit e Feed the female XLR of the ASD Cable through the bottom of the lower body tube e Attach the footer plate to the lower body tube using the three allen screws feeding the cable through the side slot of the footer plate 195 INTI Microphones AUDIO Connect the M2230 measurement microphone to the fe male XLR of the ASD Cable Insert the M2230 measurement microphone into the upper body tube so that the bottom e
178. the recorded wav tile For more details please The XL2 logs the detailed real time analyzer spectra In pre defined time intervals For more details please see chapter A voice annotation can be recorded for each stored mea surement or screenshot For r more details please see the Picture of the actual XL2 display Data Management INTi AUDIO The log data file may become very big during long term measurement applications As soon the file size reaches 2 GB during the ongoing measurement the file gets the index 1 and a new data Tile is created with index 2 XL2 Data Explorer Software combines all these data files together seamlessly 177 INTi AUDIO Data Management e Drag and drop the required data files to the PC Alternatively the SD Card can be inserted into a card reader This offers a faster data transfer from the SD Card to the PC For sound level measurements with timer mode Repeat or Repeat Synchronized the following additional data files are generated e MyTest_SLM_000_123_Report_Rep txt e MyTest_SLM_O0OO_RTA_Report_Rep txt Common xxx_Report txt files contain the mea surement data of the last measurement cycle The xxx_Report_Rep txt file contains the results of all measurement cycles in the Repeat or Re peat Synchronized mode The generated txt files are best viewed on the PC using Open with gt Microsoft Excel 178 File name e g MyTest_SLM_000_123_Log txt XL2 Broadband Log
179. their own measurement application on the computer e g for sound level monitoring or automated mea surement tasks The supported XL2 measurement functions are e Sound level meter and spectrum analyzer SLMeter RTA e FFT Analyzer e Audio analyzer RMS THD N e High resolution RTA function 1 12 Oct Tol INTi AUDIO Further Information NTi Audio 600 000 376 The Spectral Limits Option extends the XL2 function range with noise curves trace capturing relative curve display and comprehensive tolerance handling for the FFT Analysis and the new high resolution RTA with spectral resolutions up to 1 12th octave e FFT and 1 12 octave function Capturing of multiple readings into the internal memory Comparing measurement results against captures with relative or absolute curve display Comprehensive tolerance handling with tolerance masks based on captures for passed failled measurements e 1 12 octave function High resolution spectral analyzer 1 12 Oct Tol Selectable 1 1 1 3 1 6 and 1 12 octave resolution Frequency band listening at rear speaker e FFT function High resolution Zoom FFT with selectable frequency ranges and resolution up to 0 4 Hz in the range of 5 Hz to 20 kHz e SLMeter RTA function True peak level in 1 1 and 1 3 octave resolution e Noise Curves In accordance with ANSI 12 2 2008 1995 and ISO 1996 205 INTi Further Information AUDIO NTi Audio 600 000 377 The Type Approval Option upgrades
180. time e View verification results Displays measurement deviations of periodical measure ment against reference data e Exit Returns back to other XL2 measurement functions The Cinema Meter Option includes the Spectral Limits Op tion In case you have the Spectral Limits Options already installed then just go for the Cinema Assistant Option NTi Audio 600 000 378 which will provide you the Cinema Meter functionality in cooperation with the previous installed Spectral Limits Option 207 INTi Further Information AUDIO 1 i ee O a Ml AUDIO Power On XL2 Mass storage Open XL2 TA htm Activate option Login http my nti audio com 208 Further Information INTi AUDIO Insert License number Get Activation Key aji Computer amp os C xt2 NTi Audio XL2 E ad Projects W XLZ_sYS 4 Elemente XL2 Download activation file and copy to XL2 xx_Oxxxx txt 209 INTi 210 AUDIO Calibration Certificate Further Information The calibration certificate lists the individ ual product data with serial number The calibration and adjustment procedures follow the documentation and traceability requirements of the EN ISO IEC 17025 standard Annual re calibration of the in strument is recommended ensuring ac curate measurements NTi Audio 600 000 018 The Everready Pouch protects the XL2 during transport and operation With its convenient
181. time can be set to 3 5 or 10 seconds Time constant increase t 35 ms time constant decrease t 1500 ms the time weighting is an exponential function of time which defines how changes of the instantaneous sound pressure level are averaged for useful sound pressure level results The measurement results are shown ac curately for sound sources with a minimum length of 0 1 seconds Impulse time weighting is used for impulsive sound sources Applies to RMS based values LAF LAeg The correction value k1 is measured or manually set in the page KSET of the sound level meter function Applies to time weighting setting PK peak The correction value k2 is measured or manually set in the page KSET of the sound level meter function iue mo Li Actual current sound pressure level Maximum sound level of the measurement cycle Minimum sound level of the measurement cycle No correction value default setting Application example Measure LCpeak In accordance with DIN15905 The RTA spectrum analyzer measures the true peak level with the optional Extended Acoustic Pack The peak hold time can be set to 0 1 or 5 seconds Applicable for timer mode Repeat or Repeat Syn chronized displays the time averaged sound level Leq of the last measurement cycle Appendix 5 INTi AUDIO The statistical distribution of sound pressure levels is commonly used for environmental noise analy sis such
182. tomers on the support website at http my nti audio com Enable all macros when opening the document INTi AUDIO Data Management The straight forward but powerful Load Test and Save Test functions serve the dual purpose of conveniently retrieving standard test setups for repeat testing and also of saving stored result data for later recall and examination on screen The following measurement functions support the recall func tion e SLMeter sound level meter FFT Analysis R160 reverberation time 1 12 Octave Band Analysis Noise Curves STIPA speech intelligibility measurement 179 INTi e Select the memory menu L with the rotary wheel amp and AUDIO Data Management confirm with enter 180 SLMeter 123 08L Al ast 13 24 a FULDER MEH DIR LAF MyProject m Honing Sowing manual Save Test Save Screenshot COLLECT RESULTS IN OnE FILE Start Append Mode Led Gl 3323 5 HEVTE FREE KITE LEPE CACHE EHPTY I SET sehen ee 40 AHGE 130 E CNT Go po e Select Load Test and confirm with enter sbLMeter 123 1 4 LAL El asp 13 24 S FOLDER MEH DIR LOAD TEST FOLDER DIF MvProject File DIR My Test_SLh_bae CAHCEL HRITE LEFE CACHE EHFTY SET 40 FHGE 130 E PP aia g AE CiT aa a e e Select the project folder and stored data file name with DIR e Select LOAD confirm with enter SLMeter me ASD 13 24 90 2dB Leq 9
183. ton Lu or the Start stop button ba to continue the measure ment The data logging is continued in the function SLMe ter RTA during the pause period and listed in the log file gt m Starts and stops a measurement Confirms a selection Selects the required measurement function or the individu al measurement parameter esc Terminates an entry returns to the top menu level or closes an open window Overview INTI AUDIO The XL2 displays the actual sound levels also in case of no measurement has been started Any displayed averaged level refers to the previous measurement period The XL2 shows 2 9 V A OBE four lines in case of no previous measurement period is ap ae a ee E A plicable RAA 123 SLA ase 13 24 LAF e Numeric values Updated every 500ms independent of the measurement 88 Fi dB function The maximum time span between the end of E the measurement period and the first test result display is 500ms Leq 70 6 dB e Graphs and spectra Updated every 50ms TRE 0 AdB TILLITI p SET a0 HGE 150 cil ee The display is updated continuously during measurement INTi AUDIO Overview Individual level measurement results SLMeter RTA FFT Tol RT60 Polarity Delay Time RMS THD N Oscilloscope 1 12 Oct Tol Noise Curves STIPA Cinema Meter Calibrate Profile System SPL amp RTA Measurement FFT Analysis with optional Tolerance Management Reverb
184. ument status page with 1 Ler mas 5 e Serial Number Firmware 2 LAFmin 1 e Installed Options 3 LPR mas H y g as well serves for online e Firmware updates e Activation of options The XL2 system folder contains a file with serial number firmware version and installed options 170 Data Management INTi AUDIO e Select the Rep page in the sound level meter function and e Press page to return to the numeric result page set the parameters as follows e Press start P The sound level measurement is now run ning e Press stop bal to complete the sound level measurement Seva Ree LA Bt ast 13 24 g Report Setting Add Spectra All Report VWolues Selected 0 LAeq 1 LOPK max p B n J y wow O e M n I I I 171 INTi Data Management AUDIO e Select the memory menu with the rotary wheel amp 3 and confirm with enter FULDER MEH DIR LAF HyFroject Logd Test HRITE LEFE CACHE EHFTY Il 30 PHGE 130 e Press enter to confirm Save Test 172 m Haning Sowing manual Save Test Save Screenshot SLMeter 123 SLAA 7 ast 13 24 COLLECT RESULTS IN OnE FILE L Start Append Mode Aeq Gl 3323 5 HEVTE FREE OULD SET ee l Chit ee ee ne SL Heter 123 sLAE Y ASD 13 24 S FOLDER MEH DIR MvProject Save Test File RENAHE SEARCH He Test LHH E Automatic Humbering Record Voicenote GE CANCEL CACHE EHFTY
185. vel meter function the XL2 Audio and Acoustic Analyzer offers the following acoustic measurement functions e FFT Analysis with optional tolerance function e Reverberation Time RI60 e Polarity e Delay time e 1 12 Octave Tolerance Analysis optional e Noise Curves optional e Speech intelligibility STIPA optional 64 The FFT measurement is the ideal tool for visualization of comb filters and narrow band effects It allows a detailed frequency response investigation of audio and acoustic systems The XL2 includes an extremely fast real time FFT Optional features are e High resolution Zoom FFI up to 0 4 Hz steps in the fre quency range 5 Hz 20 kHz provided with optional Extended Acoustic Pack or the Spectral Limits Option e Capture and tolerance function provided with Spectral Limits Option thus the main menu function reads FFT Tol SLHeter RTA ASD 11 33 a FFT Tol Tr ATEH J de 5 00 Hz iri Oct Tol Holse Curves STIFA Cinema Meter Calibrate Profile system Settingsl ca gyz TT 10 PHIGE 110 T bls SET cnt 00 00 00 FFT Tol ikr ALA AT Asi 13 24 S EH 1AS 50E O lLinit Ih Live 11 4dJE 58 00 Hz Eii 40 58 00H2 QL TkHz 1 12 kHz S wo RAGE so Teds PE cnr ogomeg FFT Analysis Tolerance INTi AUDIO This field offers two functions e Symbols for measurement results 2 Upper result displayed as line uu Lowe
186. veraging of measurements The XL2 displays the measurement results as STI or as CIS results ac companied by the individual levels and modulation indices of the seven octave bands The measurement results are acquired from the dedicated STIPA test signal source e NTi Audio TalkBox acoustic signal generator required for audio systems with voice microphones thus measuring the complete signal chain e Minirator MR PRO test signal generator required for audio systems with line inputs e STIPA Test CD included 204 NTi Audio 600 000 339 The Extended Acoustic Pack offers the following additional fea tures for sound level and acoustic measurements SLMeter RIA function Recording of linear wav files 24 bit 48 kHz Percentiles for wide band and spectrum with flexible set ting from 0 1 to 99 9 Sound Exposure Level LAF 100ms logging Event triggered audio and data recording Time weighting Impulse Lxl Lxleq with x A C Z True peak level in 1 1 and 1 3 octave resolution Clock Impulse Maximum Level TaktMax and values as specified in DIN 45645 1 FFT function High resolution Zoom FFT with selectable frequency ranges and resolution up to 0 4 Hz in the range of 5 Hz to 20 kHz RT60 function Reverberation time RI60 in 1 3 octave resolution NTi Audio 600 000 375 The Remote Measurement Option allows querying of the XL2 measurement data online via the USB interface Thus custom ers may program

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