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Nor-116 User Manual - pt1

1. Note The marker hierarchy of the Nor 116 is such that S has the highest priority then comes P and finally M M e 0 1 2 3 4 This means that if you first mark a subperiod and then press the Pause key to temporarily halt the measurement up to ten seconds of periods actual number of periods will depend on the resolution used prior to pausing will also be set as paused Your marked subperiod may then become one of these paused periods As a consequence of the this hierarchy the M value will then be replaced by a P WF Statistics f your instrument is equipped with the Statistics Extension push SETUP followed by 1 and then 9 although 9 is not listed in the menu to see this If equipped the list will tell that 1 is in stalled The 1 means extension 1 statis tics eight percentiles will be calculated from the acquired measurement results Note that the percentiles are fixed and that they are global values they are not related to nor depending on any L t measurements This extension does not require the presence of other extensions The eight fixed percentiles are L Liy Ley Loy L and Liy L Ly 0 17 10 90 You may however have your Nor 116 equipped with one user adjustable per centile and seven fixed see Fig for de tails Note that since the percentiles are made from sorting samples according to level there must be enough samples present
2. ms Local In the Nor 116 measurement con text the local maximum or minimum SPL need not be the highest lowest recorded in a given measurement Instead it may be the highest lowest in a fraction of the to tal measurement period We therefore re fer to it as a local maximum minimum as opposed to global maximum minimum which expresses the highest lowest SPL recorded at all in a given measurement Marker A way of tagging noise events as they occur Assigning a code to one or more of the subperiods of a level vs time measurements opens up for later identifi cation of the source s Maximum The highest sound pressure evel SPL recorded Can be either a glo bal or a local maximum cf the AMax Key in Reference The Max function of the Nor 116 gives you the global SPL maximum of a measurement detected with a selected ime constant Should not be confused with peak Minimum The lowest sound pressure evel SPL recorded in a measurement Normal Display Mode The display as it ooks after you have switched on the unit and initialisation is successful Options See Extensions Overload When the input signal be comes too high the instrument will fail to treat it correctly and the levels read out may be incorrect To avoid this the input amplifier gain must be adjusted Peak The peak sound pressure is the maximum absolute value of instantaneous sound pressure within a specified time in terval Measur
3. Chapter 5 j 50 52 53 54 56 57 58 59 60 62 64 66 67 70 72 75 76 78 79 80 83 Getting Acquainted A Few Words on Batteries The Principle of Optional Extensions The Instrument Setup Menus Calibrating the Nor 116 Setting the Full Scale Preparing a Basic Version Instrument for Measurement The Electronic Level Recorder Concept Setting up an Extended Version Instrument Making a Measurement Time Profile Measurements Statistics Sound Power Measurements Making Printouts Memory Handling Default Settings Sockets and Adaptors Accuracy at Lower End of Scale Using Other Input transducers Calibrating for Vibration Measure ments Specifications Glossary of Terms Using the Sound Level Meter Nor 116 Getting Acquainted with the Nor 116 The Norsonic sound level meter Nor 116 consists of three main parts the micro phone cartridge the microphone pream plifier and the instrument body You may have to assemble the instrument the first time you use it Take utmost care when mounting the mi crophone cartridge onto the preamplifier The cartridge is a very delicate device Al ways keep the preamplifier disconnected from the instrument body when screw ing the cartridge onto the preamplifier Screw only fingertight If you screw the cartridge onto the preamplifier while the 116 is powered the voltage present at the preamplifier termi nals will
4. eter will maintain its sensitivity inde pendently of the cable length If a voltage amplifier is used the in put impedance must be high enough not to disturb the frequency range of interest The resistive part of the input impedance will set the lower fre quency limit The higher the imped ance the lower the low frequency limit will be The microphone pream plifier has a very high impedance typically 20 GQ and will therefore be a good choice as voltage amplifier The input capacitance and the cable capacitance will form a voltage divider together with the capacitance of the accelerometer and the voltage sensi tivity at the amplifier input will be given by S S C C C in which S is the voltage sensitivity S the accelerometer charge sensitiv ity C the accelerometer capacitance C the cable capacitance and C the voltage amplifier input capacitance normally negligible Calibrating for Vibration Measurements I Nor 116 may be used for vibration measurements also However the scaling of the vibration level will be in dB which easily may be converted to linear units by the user The most important vibration transducer today is without doubt the accelerometer due to its widespread use Accelerom eters can be connected to the Nor 116 ei ther directly or via a charge amplifier While sound level meters are calibrated in dB based on a microphone sensitivity of around 50mV Pa vibration measure me
5. Although large the memory of the Nor 116 may get full permitting no more data or setups to be stored in the memory In that case old files should be removed from the memory If you need a backup or think that the data are of so great value to you that you do not want to delete them you should either make hard copies of them or transfer them to a remote computer A separate PC software program called Nor Xfer Transfer available from Nor sonic makes transfer of data from the Nor 116 to a PC running Windows 95 98 NT very easy to do even for people with little or no remote control experi ence Wh Data are stored in directories named after the date storing took place Measurement setups are stored in a separate setup directory called SETUP All setups stored will be stored in the directory SETUP A directory will be created the moment you attempt to store something in the memory The name of the directory will be today s date Neither files nor setups can be stored in other directories Neither can they be moved to another directory For simplicity we have shown only three files per directory The maximum number of files that may be stored in a single directory is 999 The Nor 116 strives at protecting the acquired data If you press any key that will lead to loss of data you will be warned You will be forced to confirm your intentions either by pressing the same key a second time or
6. Assume you have an accelerometer cable S 1 14x 10 1020x 10 1 8x 100x 10 7 configuration with the following data 1 149C ms 10200F 100pF m 1 8m Specifications Unless stated otherwise all levels given in the specifications below refer to a microphone sensitivity of 50mV Pa or 26dB re 1V Pa corresponding to the Norsonic microphone cartridge Nor 1220 1225 or 1230 normally delivered with the instrument OVERALL ACCURACY The complete instrument including preamplifier Norsonic 1201 and micro phone cartridge Nor 1220 1225 corre sponds to the requirements in IEC 60651 type 1 IEC 60804 type 1 When the instrument is equipped with Norsonic microphone cartridge 1230 the instrument satisfies the requirement in ANSI S1 4A 1985 type 1 and ANSI S 43 1997 type 1 for integrating averaging sound level meters REFERENCE DIRECTION OF INCI DENCE Along the axis of symmetry for micro phone preamplifier Nor 1220 ANALOGUE INPUT Connector 7 pin LEMO fitting preampli fier Nor 1201 Preamplifier supply voltage 17V Polarisation voltage O or 200V 1 Selectable from menu Max input voltage 10Vpeak Abs max 15V Input impedance 161kQ 120pF AC coupled Noise A and C weighted lt 3V 10dB Measurement range with preamplifier Nor 1201 microphone Nor 1220 2 so A weighted 22 135dB up to 140dB for peak C weighted 24 135dB up to 140dB for peak Measureme
7. Parallelepiped surface 43 PAUSE CONT key use of 62 Pausing measurements 62 Peak 84 Peak detector 80 Peak Level 84 Percentile 84 user defined 66 Percentiles 66 displaying the 66 Phon 16 Polarisation voltage 55 Polarity of DC input socket 52 Presbycusis 16 Print menu 55 Propagation speed of sound in air 9 Pulse range 80 R Recorder electronic level 60 Reference box 40 Reflections avoiding unwanted 62 of sound waves 30 Repeat mode 54 Resolution in time domain 60 Result Mode 84 Resuming measurements 62 effect on acquired data 62 Retrieving setup 72 stored measurements 72 Reverberant field in room acoustics 31 RMS and Leq 22 Running 84 S S low 84 SEL 84 Sensitivity adjustments calibration 24 signal self noise ratio recommended magnitude 78 Sound Exposure Level 84 Sound power acoustic environment qualification procedures 46 microphone positions 40 Sound power measurements 67 Sound Pressure 84 Sound Pressure Level 84 Source coding 64 SPL 84 Static Pressure 84 Statistical distribution 35 Statistics 84 percentiles 66 Storage mode 54 Storing measurements 72 setup 72 Synchro mode 54 T Tagging sources 64 Takt Maximal a definition 84 Temperature range for use 82 Time domain resolution 60 maximum Measuring 60 Time constants 20 Time domain resolution setting the 60 Types 25 U Ultrasound 9 User selectable percentile 66 V Vibration effect of on Nor 116 82
8. W Warm up time 81 Wavelength of sound 9 Weight Nor 116 82 Weighted measurements 17 X Xfer menu 55 omic E 1 og 0 opum oo Ol Book Level v Beginning v Some experience v Intermediate f v Advanced K Tutonal v How to Reference e NN Norsonic P O Box 24 N 3421 Lierskogen Norway Tel 47 3285 8900 Fax 47 3285 2208 info norsonic com Find us on the World Wide Web http www norsonic com Mi The Sound Level Meter Nor 116 Your approach to the Nor 116 documentation depends on what you want to do and how much you already know However experienced you may be we do recom mend that you spend a few minutes on reading through this little manual It may prove useful Norsonic AS supplies a complete range of instrumentation for acoustics from sound calibrators microphones amp preamplifers via small hand held sound level meters to advanced yet portable real time analysers but also spectrum shapers building acoustics analysers and complete community industry and airport noise monitoring systems Contact your local representative or the factory for information on our complete range of instrumen tation
9. 0 1 2 3 or 4 to a period The feature of having five markers gives you the option to discrimi nate between different events Of these five markers the type 0 marker is in a class of its own The type 0 marker is a marker you set to on for a number of periods The digit 0 will then be assigned to all periods until you switch it off To ac tivate the type 0 marker press Nc and to deactivate it press Dec This type of marker is sometimes referred to as a toggle marker The four other markers are assigned to a period by pressing CAL to insert marker type 1 sETUP to insert marker type 2 EXIT to insert marker type 3 and finally ENTER to insert marker type 4 This type of marker is sometimes referred to as a sin gle marker Note that the markers type 1 4 will be as signed to one period at the time unlike the type 0 they cannot be set to on and then later to off Wi The Nor 116 accepts only one marker as signed to each period The maximum number of markers in a measurement cannot exceed one hundred Observe that the number of pauses during the meas urement will be drawn from the number of markers available e g if ten pauses are made during a measurement there will be room for only ninety markers in that measurement The length of each pause has no effect on the number of markers employed Post measurement Features Once the time profile measurement has terminated you may move the graph cur sor about
10. 128 sec onds or use the INC key Units equipped with the standard L t exten sion can log the time profile of Lag w Lyrax a and Lpgaxc While for the advanced L t exten sion you may set up time profile logging of several functions simultaneously Press sETUP followed by 3 to produce the L t functions setup menu This menu has two pages one for each spectral weighting A and C weighting Use the NETW key to go between the pages Use INc amp DEC to activate deacti vate functions If your instrument is equipped with ext 7 parallel time constants your options are expanded further to include logging of a function with different time con stants e g Max with both F S and I time constants logged simultaneously Once you have set up the functions to be logged remember to check out both spectral weightings press ENTER to exit the setup menu The instrument will now ask if the function setup shall be copied to the print and trans fer setups respectively Often but not always you would like to print all the functions logged as L t For long measurements involving many functions and a fine time resolution you may want to print or transfer to a PC only some of the logged parameters Separate setup menus are therefore avail able for setup of the functions to be printed and the functions to be trans ferred respectively As a short cut you may transfer your new function logging setup to these two setup
11. Ex Ext Ext Ext Ext Ext Ext Ex Ext Ext 1 Statistical calculations with 0 5 dB classwidth 2 Level vs time with 1 8 1 2 3 seconds resolution 3 TaktMax5 and IL 4 Extended memory 5 RS 232 serial interface 6 Advanced L t 7 Parallel detectors to measure with F S and simultaneously 8 A weighted sound power calculations 9 German Beurteiligungspegel 13 Adjustable Ln value r he setup of your Nor 116 will depend on the number of extensions it is equipped with Extensions are modules made as hard ware or in software in the instrument or e g as PC software available for your in strument Norsonic extensions are always optional and hence often referred to as op tions in this way you do not have to pay for features you re not going to use any way Nevertheless you may find that your tasks expand into new areas of acoustics as time goes by therefore a typical Norsonic extension may be installed as a retrofit Unless you are absolutely certain about the extensions installed we recommend that you spend some time to check which op tions are present in your unit To produce a list of extensions installed press SETUP followed by 1 and then 9 although 9 is not listed in the menu The menu that you now produced in the display contains an ID code two instrument codes and finally the word INSTALLED If no extensions called options here are listed below the word INSTA
12. No of the first period to be trans 0 lt z lt 99999 ferred The total No of periods to transfer Transfer format Sxxx x lt CR gt lt LF gt repeated z times Status returned see UB command above Advanced L t extension only Measurement Duration I O Commands Instruction Code Parameter Comments Measurement Hx 0 lt x lt 99 Hours time Hours Measurement Mx 0 lt x lt 59 Minutes time Minutes Measurement Sx 0 lt x lt 59 Seconds time Seconds Long period UHx 0 lt x lt 99 Hours time Hours Long Period UMx 0 lt x lt 59 Minutes Time Minutes Long period US x 0 lt x lt 59 Seconds time Seconds Note Short period time n 128 seconds is set by UN command see L t Setup I O commands Real Time Clock I O Commands Instruction Code Parameter Comments Set RTC RT 00 lt yy lt 99 year month day hour minute and yymm ddhhmm ss 01 lt mm lt 12 second 01 lt dd lt 31 00 lt hh lt 23 00 lt mm lt 59 00 lt ss lt 59 Transfer real TD None Transfer format time clock yymmddhhmmss lt CR gt lt LF gt log Misc Transfer Commands Instruction Code Parameter Comments Transfer elapsed TT None Transfer format meas time hhmmss lt CR gt lt LF gt Transfer battery voltage BV None Transfer format xx xx lt CR gt lt LF gt Transfer battery Transfer format ti BI Ni E a hhmmss lt CR gt lt LF gt Instrument Transfer format S lt CR gt lt LF
13. Peak If advanced L t mode and PTC extension both are present all the above settings are simultaneously selectable Else only one is selectable at the time the others are reset Parameter setup PO xy 1 lt x lt 12 The parameter number see UR above for numerical 1 lt x lt 28 printing y 0 Selected parameter OFF The state of the parameter see UR above y 1 Selected parameter ON Block transfer UT xy As for PO command As for PO command values On Off loo 1 Advanced L t extension only Parallel Time Constant extension only L t Transfer Commands Instruction Code Parameter Comments Block transfer of UB y z 0 lt y lt 99999 The No of the first period periods 0 lt z lt 99999 The No of periods Transfer format SXxx x SXxx x lt CR gt lt LF gt repeated z times No of parameters per period is set via the UT command Status returned E data valid M data with overload U no data calculated measured A no data available Transfer calculated UP Transfer format No of periods XXXXxXx lt CR gt lt LF gt Transfer No of UQ Max No of periods that may be allocated free periods outside of current buffer available in Transfer format memory XXXXXX lt CR gt lt LF gt Transfer of current UG Transfer format period number XXXXxXx lt CR gt lt LF gt Transfer of periods UO x y z 1 lt x lt 12 Recorded value No See UR command on 1 lt x lt 28 the previous page 0 lt y lt 99999 The
14. Sound Power Measurements gt keys to the selected position and then pressing the starr key The screen will show the normal measurement dis play during a measurement and return to the control screen and display the meas ured Lgo value for the measured posi tions at the end of each measurement Background Noise A background noise measurement is re quired to have the 116 calculate the back ground noise correction K for you On pressing the Func key the background noise measurement control display is dis played This test follows the exactly the same procedures as the sound power measurements However the background noise level will in most situations vary little from one mi crophone position to another it will therefore normally be enough to meas ure the background noise level for one typical microphone position Use the Func key to toggle between the measurement control display and the back ground noise measurement control display Measurement Surface The Sound Power calculation requires the operator to select the correct measure ment surface This is done by pushing the SETUP key again and choosing the corre sponding selection in the sound power setup menu The selected surface is indi cated by H for Hemispherical and P for Parallelepiped with an additional w or c for test objects placed against a wall or in a corner The selected surface is also in dicated by a simple diagram Depending on
15. a sudden change in level from level X to levelY and then assuming that the level remains at level Y the time constant is the time it takes to for the meter to reach 63 of the distance between the two levels Time constant F equals 125 milliseconds Frequency Weighting See A weighting and C weighting Full Scale Deflection FSD The maxi mum permissive input level not causing overload in the instrument taking the sig nal s crest factor into account crest factor is an indicator of the spikiness of the sig nal The FSD is set by means of adjusting the input amplifier gain Global Regarding the Nor 116 the term global means applying to the entire meas urement e g the global maximum SPL means the highest SPL value recorded in that measurement See also Local ILeq The I mpulse weighted continuous equivalent level is defined as T 1 ILeq 10 log Lf 10 dt ti in which the L is the I weighted sound pressure level I mpulse A time weighting with 35 ms time constant followed by peak detection and a 1 5 s time constant for the decay of the signal See also F or S Defined by IEC 60651 Input Amplifier Gain The input ampli fier gain defines the maximum permissive input signal level Must be set so that no overload occurs to produce correct level readings See also Full Scale Deflection Leq See The Equivalent Continuous A weighted Sound Pressure Level Lasar eq Ly See Percentiles
16. as soon as the self test is done Used with Nor 1201 1220 1225 1230 msi microphone system this time is prolonged due to the charging of the microphone with the polarisation voltage Normal sensitivity is reached within one minute If unit is to calibrated a two minute waiting time is recommended after power on Warm up time is reduced if electret microphones with permanent polarisation are used in lieu of the standard micro phone supplied with the Nor 116 TEMPERATURE amp HUMIDITY RANGE Operating 10 to 50 C Storing 20 to 60 C without batteries Humidity 10 to 90 RH provided no condensation EFFECT OF VIBRATION If the instrument is used under vibrational conditions it is recommended to use extension cable between the preamplifier and the instrument body The vibration will mainly affect the microphone which is most sensitive if the vibration is applied perpendicular to the diaphragm Typical values are 55 65dqB for acceleration values of 1ms perpendicular to the diaphragm i EFFECT OF MAGNETIC FIELDS The effect of a magnetic field of 80A m 50 60Hz in the most sensitive direction of the instrument corresponds to approx N A dB OVERALL WEIGHT AND DIMENSIONS Approx 610g incl batteries D 28 mm W 74 mm H 234 mm excl 365 incl microphone preamplifier Glossary of Terms A weighting By putting different em phasis to different parts of the audible fre quency range measured sound c
17. be retained and the measurement will continue as if it were just another global level measure ment which would be the case if the resolution exceeds the duration or when no time resolution option is available The Marker Feature A special feature available during time profile measurements applicable to units with advanced L t mode only allows you to tag mark special events or inci dents as they happen These tags can later be used as identification When you later move the graph cursor along the time profile graph see below for details on this markers will appear whenever the graph cursor is positioned at a period to which a marker was assigned In addition the same period will appear underlined in the graph Altogether you have five two different markers at your disposal The five are user controllable more about them be low while the two are to indicate data ac quired while the instrument is paused and to indicate the moment when an in terrupted measurement is resumed Pro file data acquired during pause will be de noted P all of these periods will be de noted P and if you halt the measurement by pushing stop and later press PAUSE CONT to resume the first period after re suming will be denoted S to make it easy to spot any discontinuities in the profile The same annotation will appear in the printouts and after transfer to a PC The five user controlled marker functions let you assign a digit i e
18. be switched off while connecting disconnecting the Nor 244 adaptor to from the Nor 116 Microphone socket pin out external view Red dot 2 15V 7 NC 1 15V 6 GND 3 NC 5 200V 0V 4 Signal External GND power inlet A M 11 15Vpc Mi VYVVYVVVYVVTVTYVYVYVYPPY S555 D22 22D 2D D22 DD HSCP 1 ED 5V RTS TD 10V GND AC out flat CDATA LP GND CTS RD GND AC out A weighted O N D T EO O aera RWM 0 ZZZZZZZZZZZZ22Z2Z2Z DOO Or 030 0 07O O OVE O10 ak o The video VGA adaptor Nor 244 available separately RS 232 connector N Norsonic VIDEO INTERFACE type 244 5 S AC out AC out 25 14 alee leone Flat outlet outlet Black amp white video VGA RGB mode outlet selector VGA outlet Combined RGB RS 232 socket Serial port TxD out p16 RxD in p17 RTS out p4 ae CTS in p5 e Analogue RGB with composite sync R p23 G p24 B p25 TTL RGB R p20 G p21 B p22 pos sync p6 neg sync p19 H sync p14 V sync p15 Connect this end to the G netal Nor 116 mini D sub socket GND p7 p8 p9 p10 p11 p18 5V p12 a 77 Accuracy at Lower End of Scale Using Other Input transducers Te lower limit is determined by the self noise of the combination of input transducer and the Nor 116 input stages For details on self noise when the Nor 116 is used together with its standard mi croph
19. combined voltage of the two batteries drops below 10 5V the instru ment will shut itself off However they will still power the internal non volatile memory although the voltage is too low for normal operation The internal calendar clock is powered by an integrated battery with approximately ten years of battery life time Pm Battery Voltage vs Time The Nor 116 offers a graphic presentation of the battery versus time history Switch on the instrument and let it initalise if applicable and press BATTERY The display will now indicate the current combined voltage of the two batteries and the use time elapsed since the bat When the Nor 116 is powered from internal batteries the current battery voltage is displayed alongside with the time elapsed since the batteries were replaced teries were replaced The graph is up dated every five minutes and each pixel corresponds to five minutes in the hori zontal direction and 0 25V in the vertical direction When the combined battery voltage drops below 13 5V a battery low indica tor appears in the display and when it drops below 10 5V the instrument shuts itself down If the instrument is connected to an ex ternal DC source the battery voltage vs time display will be shown without volt age and use time information empty graph No battery low warning will be issued when the Nor 116 is connected to an external DC source i If left unattended and
20. menus print and transfer by checking YEs before pressing ENTER when asked If you want to retain the old setup of the print and transfer menus just check No before pressing ENTER The Takt Maximal Function The Takt Maximal Extension opens up for measurements of Takt Maximal 5 and IL impulse weighted Lpo Be sure to set the measurement duration to a multiple of five seconds Otherwise one period will be truncated and no Takt Maximal will be calculated for this truncated period Note The n 128 second resolution ap 4 plies to units with the advanced L t mode ext 6 only Units without the advanced L t mode but with the basic L t mode have 1 8 second as the only choice when it comes to resolu tions better than 1 second To obtain a resolution of 1 8 second for these units set the time reso lution to 00 00 00 or use the DEC key We The menu for this task Meas dur H f S Duration 00 00 Press SETUP followed by 2 to produce this menu Fesolution 00 00 10 M Cme H9088 The parameter field just below the horizontal line indicates the number of periods your chosen resolution will imply The number in brackets at the bottom is the maximum number of periods that the memory can accommodate given the present amount of free unused memory Tip If you don t want to spend precious memory on L t logging of a certain measurement set resolution to a value larger than the du
21. set to default values These set tings are retained in the instrument by The Nor 116 default settings Battery time 0 Calibration value 84dB the instrument enters the calibration menu if means of a small backup battery How value lost ever should anything incorrect be re Measurement time 10s vealed during the self tests inconsistent Resolution 10s values are changed back to their default Time constant F settings Storage selection SPLA Network A Storage mode Manual FSD 120dB Polarisation voltage 200V Serial interface Off Baud rate 9600 Sockets and Adaptors l he Nor 116 has three sockets a mi crophone socket a mini D sub socket and the external power input socket Note that GND is ground i e all GND terminals represent the same ground There is no such as digital and analogue ground in the Nor 116 The input terminal pin 4 on the micro phone socket is AC coupled with an in put impedance of 161kQ Max input volt age is 15V VGA Video Adaptor Nor 244 AVGA Video adaptor is available sepa rately This adaptor enables Nor 116 dis plays to be shown in real time on aVGA or RGB monitor The signals are taken from the mini D sub connector The adaptor has its own D sub socket so that connecting the adaptor to the Nor 116 will not block the access to the other functions available at the instrument s mini D sub socket The output sockets available on the Nor 244 are
22. setting m7 Preparing a Basic Version Instrument for Measurement A your instrument is in the normal display mode press SETUP to gain access to the setup menu Inside this menu press 2 to gain access to the Meas dur Measurement duration menu Use the NUMERICAL KEYPAD to key in the required measurement duration in hours minutes and seconds Minimum duration is one second and maximum is one hundred hours less one second Use the CURSOR keys to move between the parameter fields used to set the hours minutes and sec onds If the required setting doesn t differ very much from the current duration setting it may be more convenient to use the INC and pec buttons to increase decrease the current setting than the NUMERICAL KEYPAD If you have keyed in numerical values terminate the key in sequence by press ing ENTER Whenever pressing ENTER is re quired the instrument displays an E at the bottom of the display vh Measurement duration user defined Date amp time of day Time constant and function parameter measured Frequency weighting Measured values The Measurement Duration menu is accessed by pushing the serup key followed by 2 Set the duration in hours minutes and seconds The normal display mode and the setup menu for a basic version instrument Full scale deflection Bargraph Shows the SPL with the main spectral weighting the one shown with the largest dig
23. size 512 kbyte nonvolatile memory powered by main instrument batteries even if the voltage is too low for normal operation Removed batteries must be replaced within 2 minutes to retain stored information Storage of up to 1440 measurements and up to 245 000 values depends on measurement configuration Stored values may be recalled and displayed or transferred via the serial interface LEVEL DISTRIBUTION Extension 1 Optional Class width 0 5dB Range 169 classes from 80dB below to 3dB above FSD The upper and lower classes has extended limits Calculation of percentage levels 0 1 1 5 10 50 90 95 and 99 Interpolated to 0 1dB resolution Optional 1 percentile freely selectable DISPLAYED FUNCTIONS A and C weighted measured simultane ously Time constant has to be selected optional F S and measured simultane ously other functions measured in parallel FUNCTIONS MEASURED A weighted functions SPL F ast SPL S low SPL I mpulse Le SEL SEL A weighted Max F Max S Max Min F Min S Min TaktMaxs Optional L Optional Peak Distribution 0 1 1 5 10 50 90 95 and 99 values for A weighted F level Optional eh functions SPL F SPL S SPL Leai SEL L SEL Max F Max S vee l Min F Min S Min l TaktMax 5 Optional Peak The levels may represent a complete measurement record from the start to the end or shorter time periods set by the selected time resolution
24. the number of functions and the number of periods It can be as short as a fraction of a second The next measurements will then start at 09 30 00 09 40 00 09 50 00 etc If you set the instrument to measure in five min utes periods it will lock on 09 30 00 09 35 00 etc A typical application of this feature is to generate hourly reports IO Print In this menu you control the transfer rate and printer type We do recommend that you turn off de activate the serial interface port when ever it s not in use to save batteries The baud rate determines the transmis sion speed and must be set to the same value in the PC or printer as in the Nor 116 Wh Serial interface port can be deactivated to save batteries when not in use Baud rate Baud rate 3600 Printer NUMER ICAL Printer type selection Language ENGLISH Language selection applies to certain printouts Select between 150 300 600 1200 2400 4800 and 9600 baud The printer can be set to either Numeri cal DeskJet ThinkJet or Diconix The language setting is there to define the language used in certain printouts aimed at measurements made in accordance with certain German standards It will not appear elsewhere Select between English and German The clock canbe Elock set by means of the NUMERICAL wot kevan Navigate 39 06 as usual and Press ENTER to H M 12 05 leave the menu Cl
25. to 200V for tradi tional condenser microphone cartridges and to OV for prepolarised ones ov Print and Xfer Parameters In the L t par menu you may specify which functions you would like to meas ure From there you can also indicate that these functions shall al be printed or transferred to a remote computer However maybe you want to measure a multitude of functions but print just a few and transfer just some of these func tions This is when to use these menus They work exactly like the L t par menu Calibrating the Nor 116 Gee of the 116 should prefer ably take place before a measure ment session is commenced or whenever required by applicable standards You calibrate the Nor 116 by means of menus and keypushes there is no potentiometer to turn when calibrating the 116 For calibration a sound calibrator such as the Norsonic sound calibrator Nor 1251 available separately is essential To calibrate the Nor 116 1 Switch on the instrument by pushing ON OFF and let it initialise count down 2 Mount the calibrator onto the micro phone and switch on the calibrator 3 Select a suitable full scale deflection by pushing INC or Dec until the bargraph deflection falls in the upper half of its range 4 Press cat to enter the calibration menu Read the sound pressure level If the sound pressure level does not correspond to the output level of the calibra
26. to calculate the percentiles to calculate the L at least one hundred samples must have been received and similarly to cal culate the L at least one thousand sam ples must have been received Until such conditions have been fulfilled the corre sponding percentile values will be re placed by a in the display The Nor 116 acquires 16 samples per second for statistics i e a measurement duration of at least 63 seconds will be needed to get valid data for the L Once the STATISTICS EXTENSION is installed you need to do nothing to activate it It will do its work every time co To display the percentiles push TBL until the percentiles table appears The per centiles table is not accessible during a i measurement the instrument will then behave as if the extension wasn t installed Measurement duration The percentiles This is the only percentile editable o i To enable editing press lt and key in the new numeri cal value for the percentile Termi nate by ENTER and view the L value directly a rii Fa P TA ra ra Ai To produce the percentiles table push the Tat key until it appears If your instrument is equipped with extension 13 one user adjustable percentile Weighting and time constant Too few samples to give valid results The percentile values Specifying your own Ly can be done before o
27. to change the gain setting without storing the acquired data first The same applies to other settings crucial to measurements In this way inconsistency is avoided be tween the current measurement setup and the one used with the measurement AN you are making sound measurements you must set the instrument so that overload will not oc cur yet in such a way that you do not miss significant parts of the measured data due to underscore To set this properly you expose the in strument to the sound field in which you are going to measure whilst watching the bargraph Ideally the meter deflection should fall somewhere in the upper half of the measurement range but below the up per end of the scale which is called the full scale deflection In cases of impulsive noise it may be hard to set the full scale deflection so that the meter deflection falls in the upper half of the range without occa sionally overloading the instrument Always try to avoid overload This is be cause overloaded measurements are un reliable you can never tell how high the level really was only that it was higher than the instrument could accommo date Measurements contaminated by over load are identified by a small arrow pointing upwards containing the letters OL What you really do when you sett the full scale deflection is to adjust the gain of the input amplifier of the Nor 116 Hence this operation is sometimes referred to as gain
28. to alter a parameter When set to repeat the instrument will store the acquired data and then restart immediately and make another measure ment using the same measurement setup and duration This applies to measure ments terminated by themselves only If you force the measurement to terminate by pressing stop it will not restart Note that some time will be spent on storing the acquired data Therefore a slight shift in the magnitude of a few seconds or less in the restart moment will be ob served Assume you ve set up the instrument to produce hourly reports and that you have started the instrument exactly on the hour After some hours the start time will have shifted a few seconds This can be avoided by forcing the instrument to ter minate the measurement just before the measurement period expires to allow the data to be stored so that a new measure ment can be started on time This is called synchro mode When set to synchro mode the first measurement pe riod is truncated if needed to make the periods fit the hour of the clock Example Assume you set up the instru ment to measure in 10 minutes periods and that you press start at 09 27 40 The first period will be truncated by the in strument and have a duration of almost 2 minutes and 20 seconds giving a little time for storing the acquired data The amount of time needed depends on the amount of data to be stored i e the com bination of
29. unoperated the Nor 116 will switch itself off after ten minutes However this does not apply if the instrument is measuring including being paused during a measurement Battery Replacement See also the previous page for details on how to replace batteries Observe the po larity indicated on the instrument body just above the battery compartment opening Correct battery type is 6LR61 Alkaline or other non leaking batteries are preferable Rechargeable batteries may be used but the Nor 116 contains no charging circuit Hence rechargeable batteries must be re charged in a separate battery charger Any external DC source such as the Nor 334 used to power the Nor 116 should have a voltage in the range 11 25V Polarity is GND at the centre pin If the Batteries Fail While Measuring Should the batteries run so low during a measurement that further operation must be discontinued the measurement will be halted and the data acquired so far will be stored in a directory called BATLOW The Nor 116 will create this directory if it didn t exist in beforehand If you find more than one file in this directory the file with the highest file number is the most recent file Any other files present in the BATLOW directory come from previous battery power failures The Principle of Optional Extensions Options Id 1021737 Codes 1935197596 Installed 1 2 5 6 7 6 9 Available extensions for the Nor 116
30. whenever you store acquired data the correspond ing setup is stored along with the data Hence if you set up the instrument and then store without making a measure ment you will have stored a measure ment setup The memory is organised very much in the same way as the memory of a per sonal computer viz with directories and file names The major difference is that neither directory names nor file names are freely selectable in the Nor 116 In stead today s date is used as directory name and the files stored in the directory are numbered consecutively starting from file number 001 Files cannot be stored under a different directory nor can they be moved to another directory Files with sound power data have P as a suffix while files with level data have L as a suffix and L t files have T as a suffix One exception to this is when you store setups these are stored in a separate di rectory called setup Note that all setups are stored in this directory regardless of date of storing 72 Manual or Automated Storing To store acquired data just press STORE af ter the measurement To store a measure ment setup just press STORE before you make the measurement This is the manual way of doing it However you may like to automate the process of stor ing acquired data a feature very easy to implement with the Nor 116 In the Setup menu accessible with the sETUP key followed by 1 there is a point called St
31. 3 Ts 54 52s U uty Ww WDWDONMNWBOWNWOAWAWNNWA OF UW A gt I Go 53x 52 53 53 56 53 5361 53 70 105 83 62 52 1 52 51 89 67 52 52 ANWUOANN WanA POO COoOWwWoOwuw Ud The above example shows that markers appear in the printout next to the period they have been assigned to The contents of the leftmost columnmay be set to appear as abso lute time if you press the abs key to set the display to show absolute time before printing ih Printout example when the normal display mode or the numerical display was selected before PRINT was pressed Start Date 99 05 10 Time 10 00 20 End Date 99 05 10 Time 10 00 35 Duration 0 15 Pause 0 00 Full Scale 110 dB Sens 26 0dB Time Const F Example of printout from a sound power measurement A Leq 71 5 C Leq TA AF Max 90 4 CF Max 90 AF Min 43 1 CF Min 51 A SEL 8353 C SEL 84 A Peak 113 5 C Peak 112 AI Leg 84 5 CI Leg 84 AF Tmx5 85 7 CF Tmx5 85 Be L 50 45 L I 88 8 90 43 L 5 75 0 95 43 L 10 z 59 0 99 43 Norsonic AS Sound Power Measurement According to ISO 3746 EN 23746 Page 1 of 2 General Information and Overall Results Sound source Manufacture Hyped dete aaa Ser No Dimensions Technical dat Test conditions Operating conditions Location of sound source in test environment AAE N T P E
32. 3 Functions measured 81 G Global 83 H Hemispherical measurement surface 41 I mpulse 83 I O print menu 54 Id code 53 ILeq 83 Incidence reference direction of 80 Infrasound 9 Input Amplifier Gain 83 Input impedance 80 Input voltage maximum permissible 80 Installed extensions 53 Instrument codes 53 Instrument Classes 25 Instrument settings displayed 81 Instrument setup menus 54 Instrument types 25 Interrupting measurements 62 ISO 3746 40 L L t effect on memory while paused 64 L t graph and numerical display switching between 64 displaying the 64 LAeg T 83 Language setting 55 Leq and RMS 22 Level recorder electronic 60 Level detector 80 Level recorder 60 Level versus Time effect on memory while paused 64 extension utilizing 64 Level vs Time 60 Linearity range 80 List of extensions 53 Local 84 Loudness curves 16 M Magnetic field effect of on Nor 116 82 Manual mode 54 Marker 84 and pauses mutual effects 64 definition 64 hierarchy 64 max number of ina measurment 64 utilizing the 64 65 Markers 64 Maximum 84 measuring time 60 Measurement duration setting up 58 Measurement range 80 Measurement set ups storing 72 Measuring time maximum 60 minimum 60 Memory non volatile 72 running full while measuring L t 64 Memory size 81 Minimum 84 Minimum duration 60 N Near field 31 Non volatile memory 72 Normal Display Mode 84 O Overload 84 Overload detector 80 P
33. A number of subsequent periods form a level versus time record Ext 2 and Ext 6 Optional DISPLAYED SETTINGS Measurement related Measurement duration range amp setup information overload information General Battery voltage and battery low indication run time since battery change calendar and time of day CALENDAR CLOCK The instrument contains a real time clock running from internal batteries Typical lifetime gt 10 years Accuracy 2 min per month I O INTERFACE RS232 digital interface for instrument control data exchange and printout Baud rate 150 300 600 1200 2400 4800 or 9600 bit sec Interface circuit may be switched on off to save battery power VIDEO OUTPUT By application of video adaptor type 244 a copy of the graphical display may be shown on an external RGB or VGA monitor BATTERY Battery type 2 pcs LR61 9 volt Alkaline Typical battery lifetime 8 12 hours for Alkaline depending on measurement mode Prolonged operation typical 15 20 hours for lithium RS232 off NiCd rechargeable batteries may be used charged outside instrument with reduced operation time Use of serial and video interfaces will reduce battery life time Battery voltage and operating time since change of battery is indicated Socket for external DC supply 11 25V WARM UP TIME The warm up time for the main instrument without preamplifier microphone is very short and the instrument obtain the final accuracy
34. E ET S EE EEE EET FPURDF RP WADA RN LY Et Ot Acoustic environment Test environmen Wind speed Wind direction Acoustical qualification of the test environment Instrumentation manufacturers Instrument Norsonic AS Type 116 Ser No Preamp1ifie Norsonic AS Type 1201 Ser No Microphone Norsonic AS Type 1220 Ser No Windscreen Characteristic Calibrator Calibration Wethod ties d ean ds dasiesa cdadweadeamdeaiieledgdaswenataie ae Calibration date Result Acoustical data Measurement surface Parallelepiped on three reflecting planes Reference box Length 1 00 m Reference box Width 1 00 m Reference box Height 1 00 m Measurement distance 1 00 m Measurement surface area 21 00 m2 A weighted sound power Lw 73 7 dB A Surface sound pressure 60 54B A Background noise correction Kl 0 0 dB Environmental correction K2 8 5CdB Qualification method Maximum C weighted Peak 99 14B Impulsive noise Yes Memory Handling Storing and Retrieving ata acquired during a measurement may be stored in the internal memory of the Nor 116 for future use The memory is of the nonvolatile type i e stored data are retained even during power off You may store and later retrieve acquired data as well as measurement setups in the memory The procedure for storing data and for storing setups are quite similar
35. F Meas finished status transfer MS Meas status transfer 0 OPx Calibration tone control ON OFF P PA PAUSE command PO x y Numerical print parameters setup PS Percentile table transfer PTx Percentile table value transfer R RF xxxx Recall file command RH xx xSet ref box height RL xx x Set ref box length RSx Set ref surface type RT yymmddhhmmss Set real time clock RW xx x Set ref box width S Sx Measurement time Seconds setup SF Save file command SMx Storage mode select SO Software options transfer SP stop command ST START command SU x Instrument setup transfer i SW Software version transfer TAx SPLmin transfer TBxt SPLmax transfer TCx Time constant setup TD Real time clock time transfer TEx SEL transfer TFx t DMax transfer Running only TLx LEQ transfer TM x Tmax5 transfer TO Overload status transfer TP Peak transfer TSxt SPL transfer TT Elapsed measurement time transfer UB y z Time buffer block data transfer UG Current period number transfer UHx Long period time Hours setup UM x Long period time Minutes setup UN xxx Short period time Milliseconds setup UO x y z Time buffer data transfer UP Selected of periods transfer UQ free periods transfer UR x y Recorded parameters setup 00 x ALL USxx Long period time Seconds setup UT x y Block transfer parameters setup 00 x ALL vV VSx Polarisation voltage select t These variables apply
36. LLED your instrument is of the basic version Press ENTER to exit The instrument will now restart like when switched on Do not change the codes If you change any of the codes your installed extensions will cease to function The Instrument Setup Menus li order to configure your Nor 116 to your liking you should spend some time going through the Setup menus to see if anything needs to be changed To enter the Instrument Setup menu press setup followed by 1 Instr menu Meas dur LE I par Power Kommune Storing 104 Print Clock Polwolt Pent par Xfer par H Storage Mode The Nor 116 offers four ways of storing acquired data after a measurement viz manual and three ways of automated Storing only when initiated by you Automated storing upon measurement terminating As for automatic but instrument restarts measurement As for repeat but restart is locked onto real time clock see text for details 54 storage When set to manual no storage takes place unless carried out by you In the automatic mode acquired data will be stored upon measurement termina tion regardless of the reason for termination i e irrespective of whether termination took place because the duration expired or because you pressed sop Navigating in the menus Use the lt gt gt to navigate between parameters in the menu and INC and bec
37. an be brought to correlate very well with subjec tive loudness Since the electrical network used to accomplish this puts different weight to different parts of the audible fre quency range it is often referred to as a spectral weighting network and the graph its frequency response describes is often referred to as the A weighting curve The A weighting curve represents one ap proximation to the human hearing Oth ers exist as well but the A weighting curve is the one that correlates the best among the approximations not containing level dependent attenuation and amplifi cation The A weighting curve is character ised by attenuating both the low and the high end of the spectrum emphasizing the region around 1 kHz where the ear s sen sitivity is at its peak C weighting Another weighting curve designed to make objective measurements correlate with the human hearing see also A weighting After years with use only as a substitute for linear the term linear is not unambiguously defined in standards and with peak measurements it has be come increasingly popular also with less sophisticated sound instrumentation mainly because it more or less follows the A curve for high frequencies and is almost flat for frequencies below 1 kHz The dif ference between the C and the A weighted value will then give condensed information on the spectral contents of the measured sound Example If the C A value is gt 0 the sound level i
38. catch you by surprise The volt age is not hazardous by any means but its presence may cause you to drop the cartridge The cartridge may not with stand a fall onto the floor Timeout If the Nor 116 is left unoperated for ten minutes it will shut itself off This will not take place if the instrument is running measuring or paused When time out is activated any data not stored will be stored in today s directory as if they were stored there by you i e the data will be located in the file with the highest file number Timeout applies only when the instru ment is running on internal batteries co The main parts of the Nor 116 Selecting polarisation voltage The cartridge supplied with Nor 116 as default requires 200V polarisation voltage If you are going to use a prepolarised cartridge turn the 200V off see the chapter Instrument Setup for details i Microphone __f i i cartridge Microphone preamplifier a Preamplifier Multifunction socket socket External power Display input socket Frontplate Keyboard Battery compartment Serial number Q Tripod fits nee o e Wh Replacing the batteries Slide the battery compartment lid to the right to open it and hold the instrument exactly upside down to get new batteries into position Note When replacing batteries fresh batteries must be inserted
39. dication will start the very moment you press AMAX he second time If you now press the amax key a third time he instrument will switch back to global maximum showing the highest level oc curring since the measurement started A fourth press on the amax key causes the Nor 116 again to switch to the local maxi mum function The local maximum indi cation will now start the very moment you press aMax the fourth time It may happen that you introduce another pause less than ten seconds after the measurement resumed from a previous pause or simply less than ten seconds after the measurement was started If so only the time back to where you re sumed or started will be deleted Once you resume a measurement you accept data already acquired with the exception of those 10 seconds which are de leted Note For L t measurements the pause function deletion of ten seconds will not erase any part of the time profile graph However all the global parameters are af fected in the same way as for non L t measurements In the time profile the peri ods acquired during the pausing will be marked P nh The effect of pausing an ongoing measurement The latest ten seconds will be deleted upon A resuming however not if the time elapsed is less than ten 10 sec seconds lt 10 sec PAUSE CONT WaS stop and pressed twice here later PAUSE CONT was pressed here The tabulation of data acquired appears wh
40. e A25 pin D sub female socket convey ing RGB signals A standard 15 pin HDD VGA socket e Amini D sub extension socket pro viding the pin configuration of the Nor 116 mini D sub output socket it self BNC outlet AC out A weighted 7 E e BNC outlet AC out Flat eRS 232 standard 9 pin socket in paral lel with the other RS 232 s The adaptor is shown on the righthand page of this page spread Compatibility and Restrictions The 25 pin D sub female of the Nor 244 adaptor containing the RGB signals has a pin configuration compatible with the Nor 830 and Nor 836 multifunction I O socket Hence a cable working with the Nor 830 836 will also work with this output This implies that even the serial interface signals to control the Nor 116 from re mote are available at this outlet Observe that the pin configuration of the mini D sub extension socket is identical to the corresponding outlet of the Nor 116 itself with the exception of the video output This prevents attempts to run more than one video adaptor from a sin gle Nor 116 The video adaptor is pow ered from the Nor 116 connecting more than one adaptor will simply be too much for the sound level meter Use the mains adaptor Nor 334 rather than the inter nal batteries The RS 232 with the standard 9 pin socket has been added to permit the use of stand ard cables commercially available Note To ensure proper operation the Nor 116 should must
41. eas dur menu contains both param eter fields for setting the total duration and for setting the time domain resolution Your Nor 116 will then act as an elec tronic level recorder Press setup followed by 2 to gain access to the setup menu Use the NUMERICAL KEYPAD to key in the required measurement duration in hours minutes and seconds Minimum duration is one second and maximum is one hundred hours less one second Use DEL to correct erroneous inputs and ENTER to terminate If the required setting differs little from the current it may be more convenient to use the INC and pec buttons to increase decrease the current setting Use the cursor keys to move between the parameter fields used to set the hours minutes and seconds Then define the resolution required Maximum finest resolution is 1 128 sec onds and minimum is equal to the se lected total duration To access this field use the CURSOR keys For resolutions better than one second the resolution is presented as n 128 s fractions hence the resolution must be a multiple of 1 128 s but with the number of milliseconds indicated just below the key in field Units with the basic L t mode only are confined to 1 8 second as the only choice below one second co To get from hours minutes and seconds to fractions of seconds you may either use the pec key or just key in the digits 00 To get from fractions of seconds to hours minutes and seconds key in 128
42. ed in pascal Pa 34 E Peak Level As for peak but expressed in dB re 20 pPa Percentile The term percentile is used to express the amount of the measuring time a certain level was exceeded Example If the L 85 dB this means that the sound pressure level exceeded 85 dB for 5 of the measurement time L is close to the back ground noise level since this level was ex ceeded for 99 of the time and L is close to the maximum level since it was ex ceeded only 0 1 of the time Result Mode Once a measurement has terminated and the Nor 116 has been subject to no further manipulation than inspection of the acquired data it is said to be in result mode Running When the Nor 116 is measur ing including being temporarily halted by pausing it is said to be in running mode SEL See Sound Exposure Level S low One of the three internationally standardised time constants When a sound level meter is exposed to a sudden change in level from level X to levelY and then assuming that the level remains at level Y the time constant is the time it takes to for the meter to reach 63 of the distance between the two levels The above ignores that the microphone may influ ence on the response time because of in sufficient high frequency response Time constant S equals 1000 milliseconds Sound Exposure Level SEL Equal to the Leq of an event but normalised to 1 sec i e the level of a one second event con
43. en A you press TBL while measuring or after Applied time constants and __ _ parameters Available only with TaktMax Extension The amax function permits toggling between display of local and global maxima Shaded area shows the max level as read in the 116 disp PAUSE CONT Was pressed here Measurement duration so far amp weighting applied Use the netw key to display the data using the other spectral weighting Results An ongoing measure ment is denoted by an R in the display gt SPL TMx5 lt lLeq The Nor 116 measures a mul titude of parameters simulta neously To display another parameter press Func while measuring or after The above Fig shows the se quence in which the param eters will appear as you press the Func key Press the Func key successively to display these parameters one by one in the normal Y AMAX pressed and once here here and and here here and her Coe Assuming the max function was not displayed in beforehand display mode here SPL Time Profile Measurements f your unit is equipped with the LEVEL VS TIME EXTENSION you may also meas ure one or more parameters as functions of time To utilise the L t features you must de fine a time resolution different i e bet ter or finer from the total measurement duration The measurement is s
44. gt startup status IS None Stalde characters T Test running M Memory test failed L Level test failed C Startup calibration test failed All tests OK Software sW None Transfer format version readout XXXXXX lt CR gt lt LF gt Instrument ID ID None Transfer format code XXXXXX lt CR gt lt LF gt Instrument Ir None NOR116 lt CR gt lt LF gt identification string Instruction Code Parameter Comments Transfer SU x x 0 or none Format 1 Format 1 instrument x 1 Format 2 Byte No Description setup x 2 Power mode setup status 0 Time constant F S T 1 Main network A or C 2 Full scale defl xxx dB 5 Polarisation voltage On P or Off 6 Sensitivity Goo x dB 11 Measurement time setting 17 Storage type M anual A uto Repeat S yncro 18 Storage directory name 24 Storage file number 28 35 Empty spaces String terminates here unless ext 2 present 40 Period time type L gt 1 sec S lt 1 second 41 Period time hhmmss or xxx 128 s 46 logged parameter s in sample mode Each parameter is two bytes and right justified See also UR xx command Format 2 Byte No Description 0 11 Measurement start time YYMMDDHHMMSS 12 23 Measurement end time YYMMDDHHMMSS Wi Instruction Code Parameter Comments Transfer SU x x 0 or none Format 1 Power mode setup instrument x 1 Format 2 Byte No Description
45. gt keys to move to the required directory Clear tile SETUP a 39051 1 330603 330607 330610 Use to move back to the files column and the lt gt gt to move to the required file and press ENTER Clear tile SETUP iii 390511 OUT 330603 O03T 330607 OO4T 390610 00ST Papel 1 006T ZENE 6 00ST 390630 009T You will now be prompted to confirm your intentions Clear tile SETUP OO1T CONFIRM A Move cursor to here to delete selected file and press ENTER again Leave cursor here to quit without deleting the file by pressing ENTER QUIT To delete a directory Start by pressing the clear key Then use the lt key to move to the directory column Clear tile Press enter to produce the below prompt and select your option Delete selected directory Quit without deleting Delete all data files leaving setup files intact Clear tile Reset entire memory Press ENTER Deleting setup files only To do this treat them as files or directories to be removed There is no single command to remove setup files leaving data files intact Resetting the entire memory Follow the procedure for deleting a directory but select RESET before pressing ENTER Default Settings in the Nor 116 hen the Nor 116 is powered for the first time all instrument set tings are
46. if lt Store gt you pressed or incorrectly you lt INC gt should store the data first Data not saved Press SETUP 002 003 001 990610 002 003 001 990611 002 Directories 003 Files of the selected E 007 z directory 990618 002 SETUP 1 Instr In the Instrument Setup menu there is access to the storing mode of the 116 Instr menu 1 Storing The directory and the file columns 001 Recall Suffix indicates file type 003 L level T level vs time P sound power Storing Manual How Synchro works Example 1 Assume measurement duration set to 5 minutes Synchro on If started at 08 02 am the first period will run until 08 05 the next until 08 10 etc Example 2 Assume measurement duration set to 22 minutes Synchro on If started at 08 02 am the first period runs until 08 22 the next until 08 44 etc For noise monitoring tasks Synchro is the pre ferred setting Free Automatic Repeat Synchro BB x Memory Handling Deleting Files and Directories i To delete a file Start by pressing the cLear key Clear tile O01 T Selected file Selected directory Then use the lt key to move to the directory column Clear tile Use the lt
47. ings OVERLOAD DETECTOR Instantaneous and latched overload indication LEVEL DETECTOR Simultaneous detection of A and C weighted levels Levels from 80dB below to 7dB above FSD are indicated Resolu tion 0 1dB Time constant F S and or I Displayed functions are instantaneous level minimum level maximum level Equivalent continuous level and sound exposure level within the selected measurement period TaktMax as Extension 3 optional Crest factor Minimum 10 at FSD increasing for lower levels Linearity range 80dB according to IEC 804 type 1 5dB above to 75dB below FSD Pulse range 83dB according to IEC 804 type 1 PEAK DETECTOR Simultaneous detection of A and C weighted peak levels Dynamic range 10dB above to 57dB below FSD Accuracy 2 dB vh INTEGRATION TIME The measurement time is selectable in 1 second step from 1s to 99h 59m 59s Integration settling time is less than 1s Measurement periods down to 1 8s in level vs time mode Extension 2 op tional On activating the PAUSE function the instrument will cancel acquired data recorded up to 10 seconds before the switch was operated MARKER If advanced level versus time mode is selected Ext 6 optional up to 5 markers may be placed at different points along the time axis for identification purposes GRAPHICAL DISPLAY Graphical reflective LCD display 64x128 pixels Dimensions BxH 43x61 mm DATA MEMORY Memory
48. its Datum lower end of scale Note If your instrument is not of the basic version skip this part and proceed with the part Setting up an Extended Version Instrument instead Note Setting up the clock giving the time of day correction for daylight saving time and other general instrument parameters is done in the instrument setup menu described in the chapter The Instrument Setup Menu The Electronic Level Recorder Concept NW Norsonic Type 116 For each period a short term L is calculated while the SPL is sampled at the end of each period A the MAX MIN Peak and SEL are calculated per period i AF Mk Instead of printing them directly on paper the Nor 116 puts the data into its memory for later inspec ooe A tion or printout SPL S34 WNES Cee gt BaF ee Fcc ror The electronic level recorder concept uses memory even if you do not store the acquired data There is only one memory in the Nor 116 and this is used both to store data and to make L t measurements Until you store an L t measurement the data are marked may be erased Once you decide to keep the data by storing them the remark is removed and the data are stored in the memory This sharing of the memory explains why the n
49. legal command in this mode No data valid Number out of range Error in text format Memory full No file found error File number already in use Ilegal in RUNNING Memory operation OK p are having a problem with your orsonic equipment first check out that all the basic requirements to the entire instrumentation are fullfilled for the task you want to accomplish Verify that the required optional in strument extensions are present and operating In case the Norsonic prod uct is a software program verify that your computer has the minimum hardware necessary for this product and that it runs on an operating sys tem platform sufficiently powerful for the task In cases where the Norsonic equip ment is used together with equip ment from other manufacturers verify that this equipment works properly You should also verify that the use of these products together with Norsonic products causes no harm to either products IfYou Are Having a Problem with Your Equipment Observe that any damage to Norsonic products caused by the use of Nor sonic equipment together with equipment from other manufacturers is considered to originate from im proper handling of the Norsonic equipment and thus not covered by our warranty If you are uncertain about the con figuration of instrument extensions options etc concerning your Nor sonic hardware you should consult the user documentation accompany ing your Nor
50. llel port printer a serial to parallel adaptor is available Contact your local representa tive for details on this Any baud rate will do but the printer and the Nor 116 must of course be set to the same baud rate to make things work properly Once set up just press PRINT to generate a printout The look of the printouts will depend on the kind of measurement you have made ordinary or L t Examples of printouts are shown on this and the fol lowing page For more information turn to the chap ters The Instrument Setup Menus and Set ting up an Extended Version Instrument Printout example when L t display was selected before PRINT was pressed Start Date End Date Duration Full Scale Rel Time oO j WWNHNRFPRPOOUNUFRPBWWNHYHNR FO O H oo oOo Of oC O o O G NFARFARFPARFPARFAFAHAEF OO O H Time Const 99 05 10 99 05 10 Leal 120 dB S CS Min 533 53 53T 53 53 3 53 53 5 P 53 53 6 P 54 54 4 P 53 53 4 53 53 0 1 253 86 7 82 66 5 62 101 0 96 79 3 15 52 9 S 52 51 9 51 52 1 52 61 5 102 84 7 80 63 2 59 52 8 527 Shee OMNWORPNTNT CH HWABAINPFPUWD Time Time Pause Sens Period gsl 53 53 53k 53 54 54 53 53 78 59 92 70 52 51 52 97 76 56 52 MwWONoUBPDAWERPAUBRBRAIRFP DANO 13 42 39 13 44 23 0 23 26 0dB 00 00 01 53 52 53 5 53 591s 53 s 53a 53 74 STe 88 66 52 52 51 9
51. lowing the provisions of the LVD and EMC Directive This product has been manufactured in compliance with the provisions of the relevant internal Norsonic production stand ards All our products are tested individually before they leave the factory Calibrated equipment traceable to national and international standards has been used to carry out these tests This Declaration of Conformity does not affect our warranty obligations Tranby October 1995 agfinn Jahr Quality Manager The declaration of conformity is given according to EN 45014 and ISO IEC Guide 22 Norsonic AS PO Box 24 N 3421 Lierskogen Norway NN Worsonic Warranty The normal warranty period provided for our products is 12 months after the time of delivery unless stated other on the warranty certificate included in the shipment Norsonic AS gives no warranty for products or parts included in the shipment not manufactured by the seller other than granted to the seller by the original manufacturer The warranty does not include damage due to improper handling overload force majeure or normal wear and tear The warranty is not granted if the buyers make modifications or repairs without our written consent Norsonic AS can choose either to repair or to replace parts having defects due to material and or workmanship provided these defects cause unsatisfactory operation or appear ance Defective goods should be returned to our factory or one of ou
52. nsfer Commands 94 Real Time Clock I O Commands 94 Measurement Duration I O Commands 95 Misc Transfer Commands 98 Level Transfer Commands 99 Sound Power I O Commands 100 Statistical Distribution I O Commands 101 Status 102 Status Information Received with the FS Command 103 If You Are Having a Problem with Your Equipment 106 Index Remote Control Commands Index Warranty Remote Control Commands Listed Alphabetically A ATx Absolute time on off B BPx Transfer sound power raw data values BT Battery time transfer BV Battery voltage transfer BW x Bandwidth network setup Cc CDx Clear directory command CF xxxxClear file command CO CONTINUE command CS xx x Sensitivity setup D DMx DMax activate DRx Directory info transfer D xxxxxx Directory name setup E EC xx x Set env corr factor F FE xxxx File exist command FM Free memory transfer FS I O status transfer F Directory name transfer G GAx Gain setup H Hx Measurement time Hours setup HR xx xSet hemisphere radius I ID Instrument m code transfer IR Instrument software RESET command IS Instrument start up status transfer IT Return instrument identification string K Kx Keyboard simulation L LL Disable local keyboard command LO Enable local keyboard command LW Transfer of power Lw M Mx Measurement time Minutes setup MC Meas clear 6 READY mode MD xx x Set meas dist par epiped M
53. nt range with preamplifier Nor 1201 microphone MK102 1 A weighted 17 135dB up to 140dB for peak C weighted 19 135dB up to 140dB for peak The measured figures are at least 5dB above the noise floor Higher levels may be measured by application of attenuator Nor 1260 or by use of a less sensitive microphone Influence of extension cable Up to 10m extension cable Nor 1408 may be used between the preamplifier and instrument body without any correction Longer cables may influence the measurement of high level high frequency signals ANALOGUE OUTPUT Flat and A weighted signal outputs AC are provided Output impedance max 100Q min load impedance 2kQ Shortcircuiting the terminals will not affect measurement accuracy FSD corresponds to approx 0 83V MEASUREMENT RANGES For microphone sensitivity in the range 24 1 to 34 0dB re 1V Pa the total measurement range for the instrument is divided in five ranges with 70dB overlap 10 90dB 20 100dB 30 110dB 40 120dB Reference range 50 130dB Reference level 94 0dB Reference frequency 1000Hz The total measurement range corre sponds to 3yV to 3Vams up to 10V peak at the input terminal By selecting microphone sensitivity setting in 0 1dB steps in the range 84 0 to 15 9dB re 1 V Pa the total displayed range may be set in 10dB steps between 30 to 90dB and 60 180dB peak up to 190dB Accuracy of range settings better than 0 2dB between any gain sett
54. nts normally uses g or ms The calibration value is in mV Pa or dB re TV for example 50mV Pa 26 0dB re 1V It is easy to convert from one to the other because 20 log 50 1000 26dqB Accelerometers are very similar ie the sensitivity is given in mV g or mV ms If the value had happened to be 50mV g the sensitivity would have been as for the microphone ie 26dB re 1V Similarly if the level given is 10mV ms the sensitivity would be 20 log 10 1000 40 dB and this would be what to key in as sensitivity in the Nor 116 Generally you find the sensitivity from XdB 20 log s 1000 where s is in mV g or mV ms In this case 0dB will corre spond to 20mg or 20ms as the reference for sound levels is 20pPa Some calibrators state the calibration level in Peak values and not RMS so sub tract 3dB This correction is however valid for sinusoidal signals only All of the above is valid when the accelerom eter is used with its standard length of cable only If you use other lengths or types of ca ble the resulting voltage sensitivity must be calculated see the example below Note that in the case of line drive or if you use a charge amplifier this does not apply as the acceler ometer output signal will then not be affected by the input impedance of the sound level meter Example Charge sensitivity S Internal capacitance C Specific cable capacitance C Cable length l S 0 95mV ms
55. nvironmental dustrial room ale a 6 0 2 Irregularly shaped room with furniture irregularly 2 5 shaped machinery or industrial room obtained from f thie crash b 0 25 Room with upholstered furniture machinery or in grap OY 4 dustrial room with small amount of acoustical ma entering the terial oe 3 0 35 Room with acoustical material om both ceilings appropriate 2 and walls aie of A S 0 5 Room with large amounts of acoustical material 1 on ceiling and wall Py 0 5 1 5 10 50 100 300 A S Calculating the A The value of the mean acoustic absorption coefficient a is estimated by using the above table The value of A is then given in m by A a x S in which S is the total area of the surface of the test room walls ceiling and floor in m Calculating the S Hemispheres S 2pr Parallelepiped S 4 ab bc ca yy I a 5 d b d N lz C 5 d L are the dimensions of the rectangular reference parallel epiped Making Printouts nce you have made your measure ments you may want to make hardcopies for your reports etc The Nor 116 can output acquired data numerically to most alphanumerical printers equipped with an RS 232 serial interface A very important thing here is the baud rate which reflects the trans mission speed over the RS 232 interface The Nor 116 can be set to a variety of baud rates for details see Instrument Setup If you want to run printouts on a para
56. ock The Nor 116 comes with a real time clock which is the technical name for the clock showing the date and time of day To set the clock key in the correct figures and press ENTER Navigate as usual Polarisation Voltage As default the Nor 116 comes with a standard condenser microphone car tridge requiring 200V polarisation volt age However electret or prepolarised microphones may also be used with this instrument Most prepolarised cartridges will not be harmed by being exposed to 200V polari sation voltage This may or may not ap ply to specific electret microphone car tridges Check this out before mounting the cartridge on the instrument Norsonic is not liable for damages neither direct damages nor consequential damages oc curring as a result of incorrect application of polarisation voltage to a microphone cartridge If the sensitivity of the microphone seems to be very low all sound levels are on the lower side than they should be you should check the status of the polarisation voltage If set to OV traditional condenser micro phones will appear to have very low sensi tivity and if set to 200V prepolarised car tridges will exhibit the same provided they can take it Allow for some time to settle before checking the sensitivity again If the polarisation voltage is correct but the sensitivity low check the sensitivity setting in the calibration menu Set the polarisa Pol volt tion voltage
57. one see Specifications The standard microphone is a 4 type If you switch to a 1 you will experience a lower self noise limit of typically 12dB A SPL Generally we recommend a signal self noise ratio of 7dB to keep the linearity er rors due to self noise less than 0 2dB If you choose to use the Nor 116 to ana lyse noise or vibration recorded on tape we recommend that you remove the preamplifier and connect the tape re corder output directly to preamplifier socket contact your local representative for details if necessary Note that signal is on pin 4 and GND on pin 6 A suitable cable for this will be the Nor 1438 LEMO BNC i Nor 116 low noise correction table Correct dB values for Nor 116 shows dB A 10 0 11 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 20 0 21 0 22 0 23 0 24 0 25 0 26 0 27 0 28 0 29 0 30 0 Nor1220 2 16 0 17 8 19 3 20 7 22 0 23 3 24 4 25 5 26 6 27 7 28 8 29 8 MK102 1 11 0 12 8 14 3 15 7 17 0 18 3 19 4 20 5 21 6 22 7 23 8 24 8 25 9 26 9 27 9 28 9 29 9 20pF equiv 7 0 8 8 10 3 11 7 13 0 14 3 15 4 16 5 17 6 18 7 19 8 20 8 21 9 22 9 23 9 24 9 25 9 27 0 28 0 29 0 30 0 Calculating the Voltage Sensitivity A charge amplifier has a low input impedance and a sensitivity propor tional to the charge The influence from the cable capacitance is then without significance ie the accelerom
58. oring Set the cursor to Manual to store data only when pressing STORE Set it to Automatic to have the Nor 116 store the acquired data as soon as the measurement terminates irrespective of reason for termination either because you pushed stor or because the preset duration expired Set it to Repeat to combine the autostore with an autostart i e the start of another measurement with the same setup and duration or to Synchro which is like Repeat but with the Nor 116 locking onto its real time clock to ensure that the periods always are synchronised with the real time clock A more detailed discussion on this can be found in The Instrument Setup Menus The settings in this menu will apply to all measurements until the setting is changed Retrieving Stored Information To retrieve stored data or setups use the RECALL key Note that the setup cannot be exploited in future measurements The RECALL function is a viewing function rather than a short cut for setups In stead a previously stored setup must be retrieved to achieve this Use the Fk and gt keys to go between the directory column and the file col umn To move up and down in any of the columns use the lt amp E gt keys Once you have found the file you want to retrieve push ENTER to retrieve it If you want to exit the menu without re trieving any file push exir to return to normal display mode When Memoty Gets Full
59. overload O Overload active now L Latched overload but no overload now t Applies to units equipped with ext 7 parallel time constants only Sound Power I O Commands Instruction Code Parameter Comments Set reference RS x x 0 Hemisphere floor surface type x 1 Hemisphere wall x 2 Hemisphere corner x 3 Parallelepiped floor x 4 Parallelepiped wall x 5 Parallelepiped corner Set reference RLx 0 00 lt x lt 56 00 metres box length Set reference RW x 0 00 lt x lt 32 00 metres box width Set reference RH x 0 00 lt x lt 40 00 metres box height Set measure MD x 0 00 lt x lt 20 00 Parallelepiped metres ment distance Set hemisphere HRx 0 00 lt x lt 10 00 metres radius Set environ ECx 0 00 lt x lt 10 00 Correction factor dB mental correc tion factor Transfer of Lw LW None Transfer format Sxxx x lt CR gt lt LF gt sound power level Status returned E data valid M data with overload U no data calculated measured C Environmental corr too high B backgr noise level too high nm Instruction Code Parameter Comments Transfer sound BP x x 0 LeqA Transfer format Sxxx x lt CR gt lt LF gt power raw data x 1 BGN repeated 40 times x 2 PeakC S E data valid M data with x 3 DI overload U no data x 4 LeqAl x 5 Impulsiveness Statistical Distribution I O Commands Instruc
60. r after a measurement but not on stored measurements recalled from the memory Note This table is not accessible during a measurement Te sound power calculation extension enables you to make a complete sound power measurement resulting in an L value the A weighted sound power level of any test object in accord ance with ISO 3746 and related Stand ards This means that when equipped with a Nor 116 you may test the L of new products for the European CE label ling in the production area in situ rather than in a laboratory in vitro Making Measurements Before you start to make sound power measurements we recommend that you familiarise yourself with how to make regular sound level measurements Once the test object is properly placed you start the setup procedure by select ing measurement duration as described in making a level measurement Then press setup followed by 4 The in strument will now enter the measurement control display The Nor 116 allows 1 40 microphone po sitions to be measured The initial meas urement control display shows 8 posi tions but this may be extended to further pages covering the positions 9 40 by pressing the gt key next page At the bottom of the screen the averaged sound pressure level based on the meas ured microphone positions is displayed Each microphone position is selected by moving the field cursor using the amp or
61. r microphone posi to go between pages tions are shown there are further pages so that a total of 40 micro phone positions can be covered Use the gt gt I key Although the 116 lets you measure the background noise level in up to 40 positions the background noise level will in most situations vary so little from one microphone position to another that it is for most cases sufficient to measure the background noise level for one typical microphone position After a successful set of measurements has been made the results are presented like this upon pressing the TBL key The results can also be printed out Turn to Printouts for a sample i The environmental correction factor K accounts for the influence of undesired sound reflections from room boundaries and or reflecting objects near the source under test The magnitude of this environmental correction factor depends principally on the ratio of the sound absorption area A of the test room to the area S of the measurement surface The magnitude does not depend strongly on the location of the source in the test room 10 iA a Description of Room se ad HE 0 05 Nearly empty room smooth hard walls made con Site with the 8 k 3 crete brick plaster or tile ISO 3746 the s 0 1 Partly empty room room with smooth walls 7 0 15 Room with furniture rectangular machinery or in e
62. r distributors as decided by the seller However no goods shall be returned to our factory without a foregoing written consent from Norsonic AS giving shipping instructions Return shipments are to be paid and insured by the buyer unless otherwise agreed Ifa defect has to be repaired at the user s premises the buyer will be charged travelling and residential expenses Index Symbols 116READ Nor Xfer 72 A A curve 18 A weighting 83 Accuracy at lower end of scale 78 overall 80 Acoustic environment sound power 46 Analogue input electrical data 80 Analogue output electrical data 80 Automatic mode 54 B curve 18 Background noise sound power 67 Baud rate setting 55 Block diagram of the Nor 116 23 C C curve 18 C weighting 83 Calibration 56 Characteristic dimension 40 Class width 81 number of classes 81 range 81 ma Classes of instruments 25 Clock setting the 55 Condenser microphone 23 Crest factor 80 D D curve 18 DC input socket polarity 52 Deleting directories 74 files 74 setups 74 Deletion of data while paused 62 Detector Response Time 19 Dimensions of Nor 116 82 Display electrical amp mechanical data 81 Dynamic range of sound 23 E Electronic level recorder 60 Equal loudness curves 16 Extensions 53 83 displaying installed 53 utilising the Level versus Time 64 F F ast 83 Fletcher Munson curves 16 Full Scale Deflection 23 Full Scale Deflection FSD 8
63. ration The advanced L t parameter menu The advanced L t parameter menu for units with parallel time constants If you want your param eter setup to also apply to your print setup and transfer setup menus select yes Copy all Leto par to Prntex fer Making a Measurement Po that you have set up the in strument properly you are now ready to start making measurements Hold the instrument at arm s length or mount it on a tripod This will help avoid both reflec tions from your body and blocking of sound from some directions Press START to begin the measurement The instrument will now switch to display the relative time i e the time elapsed since the measurement was started Press ABS t to switch back to absolute time if re quired If left unoperated the instrument will go on measuring until the preset duration expires You may however interrupt an ongoing measurement at any instant by pressing the stop or the PausE conT key This is a handy feature whenever events occur which you do not want to include in your measurements Once everything is back to normal a second press on PAUSE CONT will resume the measurement Note that once you resume measuring the latest ten seconds of data acquired just before you pressed PAUSE CONT to halt will be deleted and the measure ment will go on until the total measure ment time equals the preset duration If you press stop before PAUSE CONT no 10
64. rectory D x00000 SETUP or YYMMDD Directory name Use this command before RF name x CD x and DR x to select 1 o directory name Transfer direc F None Transfer format xxxxxx lt CR gt lt LF gt tory name Save file SF None Recall file RF x 1 lt x lt 999 Clear file CF x 1 lt x lt 999 Clear selected CD x x 0 1 or None 0 or None Clear selected directory directory 1 Clear all directories except SETUP Transfer dir DRx x 0 Info on current file Transfer format directory information information x 1 Info on current directory xxxxxx nnnn lt CR gt lt LF gt x 2 Info on curr dir amp all files Transfer format meas result file information x 3 Info on all directories nnnn D MYY MM DD x 4 Info on all dir amp all files HH MM SS lt CR gt lt LF gt XXxXxxx dir name nnnn file number D is either S Setup D Level Data or T Time Data M is either L Level mode P Sound Power Mode or K Kommune Mode A completed transfer is followed by lt EOF gt lt CR gt lt LF gt in which lt EOF gt is End of File CTRL Z ASCII char No 26 or Hex 1A Test the exist FE x 1 lt x lt 999 Transfer format S lt CR gt lt LF gt ence of a file Returned status File number is not used number in 116 s File number in use Return free FM None Transfer format memory space XXXXxx lt CR gt lt LF gt Select storage SM x x 0 Manual x 1 Auto mode x 2 Repeat x 3 S
65. s dominated by low frequency below 1 kHz sound Equivalent Continuous A weighted Sound Pressure Level L Aeg T The con stant level expressed in dB A which last ing for as long as a given A weighted noise event i e for a period of time T has the same amount of acoustic energy as a given A weighted noise event The general definition of the equivalent continuous sound pressure level is T 2 P t z at 0 Leq 10 log Lj T 7 p in whichT is the measurement period p t is the actual sound pressure signal and p is the reference sound pressure 20 pPa If the sound pressure in the above equa tion has been exposed to an A weighting network we obtain the L haat Extensions Norsonic instruments are of modular design In this way the user does not have to pay for features never used However the modules may be installed as retrofit any time allowing functional ex pansion of the instrument Since this func tional expansion extends the application range of the instrument it is referred to as an Extension to the instrument Most Ex tensions are designed to work inside the instrument but even a PC program de signed to work together with the instru ment may sometimes be regarded as an Extension Since an Extension is not a part of the basic instrument it is referred to as an option in our price lists F ast One of the three internationally standardised time constants When a sound level meter is exposed to
66. seconds backerasure will take place If you let the measurement terminate by itself and then push the pause cont but ton the measurement will be prolonged until the total measurement time equals twice the initial setting If you repeat this co E the total measurement time will end up equalling three times the initial setting etc In this case there will be no deletion of acquired data upon resuming The Nor 116 measures several param eters simultaneously viz SPL Lig Max Min SEL and Peak TaktMax5 and Theo TMax extension Each of these func tions can be displayed one by one by pressing the FUNC key successively Alter natively all the parameters may be dis played simultaneously in a table Press TBL to display this table These data all relate to the entire meas urement as such not just parts of it and they are therefore referred to as glo bal parameters The amax function on the other hand permits switching between the global maximum and local maxima occurring af ter you reset the local maximum buffer Note which is where the instrument stores this information This function works during the measurement only and not after it The first time you press aMax the dis played function will switch to Max un less you had set it to display Max in be orehand by means of the FUNC key The next time you press aMAx key the Nor 116 will display a local maximum unction The local maximum in
67. setup cont x 2 Power mode setup status 0 Surface type 0 Hemisphere floor 1 Hemisphere wall 2 Hemisphere corner 3 Parallelepiped floor 4 Parallelepiped wall 5 Parallelepiped corner 1 Surface lengtht 6 Surface widtht 11 Surface height 16 Measurement distance or hemisphere radius 21 Surface area 28 Background corr factor 33 Environmental corr factor 38 Impulsive power flag T impulsive 0 not impulsive Software SO None Transfer format extensions XX XX XX lt CR gt lt LF gt options installed If empty the measurement surface is considered to be hemispherical Level Transfer Commands Instruction Code Parameter Comments Transfer of SPL TS xt x 0 Current Transfer format Sxxx x lt CR gt lt LF gt x 1 F S E data valid M data with x 2 S overload U no data Use BW x x 3 I command to select between A and C weighted values Transfer of TAxt As for TS command See TS above SPLmin Transfer of TB xt SPLmax As for TS command See TS above Transfer of LEQ TLx x 1 LEQ See TS above x 2 LEQI Transfer of Tmax5 TM xt x 1 TaktMax 5 F See TS above x 2 TaktMax 51 Transfer of Peak TP See TS above Transfer of SEL TE xt x 1 SEL See TS above x 2 ISEL Transfer of Delta Max TF xt As for TS command As TS above but only when RUNNING Transfer TO Transfer format S lt CR gt lt LF gt overload status Status returned E No
68. sonic products For the equipment manufactured by others than Norsonic and for your computer you should check the user documentation included with these products The user documentation should pro vide the answers to the majority of your questions If your questions are not answered in he user documentation contact the dealer s where you purchased your instrumentation hardware If you feel confident that your prob lem is due to your Norsonic equip ment you are welcome to contact Norsonic or your local Norsonic rep esentative Kindly state the product type number and serial number when applicable in all correspondence and have it available whenever you call for sup port If you make any claim for repair up date or replacement do not send goods to the factory without written consent from Norsonic AS giving shipping instructions cf our Terms of Warranty NN Worsonic Declaration of Conformity We Norsonic AS Gunnersbratan 2 Tranby Norway declare under our sole responsibility that the product Sound Level Meter type Nor 116 FROM SERIAL NUMBER 20241 to which this declaration relates is in conformity with the following standards or other normative documents Performance complying with IEC 60651 type 1 TEC 60804 type 1 DIN 45 657 ANSI S1 4A 1985 type 1 ANSI S1 43 1997 type 1 Safety EN61010 1 1993 for portable equipment and pollution category 2 EMC EN 50081 1 EN 50082 1 fol
69. taining the same energy as the actual event i Sound Pressure Total instantaneous pressure at a point in presence of sound waves less the static pressure at the point Unit pascal Pa Sound Pressure Level SPL As for sound pressure but expressed in dB re 20 pa Static Pressure Pressure that exists at a point in the absence of a sound wave Unit pascal Pa Statistics In some applications such as community noise measurements and airport noise monitoring the statistical distribution of the sound level is used to describe the noise emission profile of the measured object Calculated data are sometimes presented as distribution density or cumulative distribution but for short also often as percentiles Takt Maximal A way of assessing the Leq based on consecutive measurement of SPL maximum within a few seconds periods The Nor 116 uses five seconds periods and is therefore said to measure the Takt Maximal 5 Briefly the SPL maximum is measured inside five seconds intervals and an Leq based on these maximum values is then calcu lated Used mainly in Germany Weighting Network See A weighting and C weighting Chapter 6 86 Remote Control Commands Listed Alphabetically 87 Calibration I O Commands 88 Measurement Control I O Commands 89 Measurement Setup I O Commands 90 Memory Handling I O Com mands 91 Keyboard Lockout and Simulation I O Commands 92 L t Setup I O Commands 93 L t Tra
70. tarted by pressing the start button To display the time pro file press the L t key during the meas urement During the measurement you may switch between graphical and numerical display by means of the L t key Should you need to pause the measure ment do this the usual way by pressing the pause cont key However in L t mode the Nor 116 will still collect data but these data will be marked as acquired while paused In the graphical display mode data ac quired while paused will appear under lined This feature has three advantages data acquired while paused do not take part in the calculations of any of the global pa rameters it enables you to see what is go ing on during the pause and if the data later are transferred to a PC any part of the paused data may be unpaused and calculated on ad libitum There is a catch though data acquired while the unit is paused will occupy their cg share of the memory This means that even if you haven t set up the instrument to spend all free memory available on a time profile measurement the memory may still run full if the pause is long enough So what will happen then When the 116 states the amount of free memory avail able space has already been allocated for the global parameters of your measure ment Should it happen that the memory runs full during an L t measurement the time profile acquisition will cease the profile acquired so far will
71. the graph to inspect the ac quired data Use the cursor keys for this To make the cursor move fast through the graph keep the key depressed To jump along the graph the and cur sor keys may also be used The first time you press the lt gt cursor key the graph cursor jumps to the extreme left right of the screen The next you press the same key the cursor will jump one screenwidth Its current position is indi cated as shown in the Fig to the left The global values are accessible in the same way as explained in a few pages back either by use of the L t and FUNC or by use of the TBL key When measuring the level versus time the display may be set to display the L t graphically When the unit is paused the data acquisition does not halt instead the data are marked as paused data This is indicated in the L t display by underlining paused data The graph cursor Time elapsed Running Value at cursor position The Mk field is used to supply additional information on the subperiod at which the graph cursor is located If the marker function was applied a number will appear in lieu of the M while if the instru ment was paused when the selected Oo Gas period was acquired a aK SPL P will appear in lieu of the M If the instrument was halted by use of stor a push on Pause cont will produce an S in the first period after the measurement is resumed
72. the selected surface the measurement radius or distance from the reference box as well as the size of the ref erence box i e the minimum square box that fits around the test object must be keyed in The calculated area S of the to tal measurement surface will then be dis played Finally the acoustic environment correction K must be chosen and keyed in Sound Power Results Based on the averaged sound pressure level of all the microphone positions the meas ured background noise level and the selec tions and corrections made in the sound power setup menu the Nor 116 displays the final L result by pressing the TeL key In addition to the overall results the impulsive noise values the L level and the noise directivity of the test ob ject for all microphone positions are found by sequential pushes of the TBL key The results may also be copied to a printer The report includes necessary spaces for all the required measurement information to be written directly on the report by the user On a second page the individual results for each of the microphone positions are printed m7 The measurement surface can be either a hemisphere or a parallelepiped In addition you may choose between different locations of your test object i e on the floor up against a hard reflecting wall or in a corner The background noise measurement display The measurement control display Use next and Although only 8
73. tion Code Parameter Comments Transfer PS None Transfer format percentiles plp2p3p4p5p6p7p8 lt CR gt lt LF gt available Percentile table PTx x 1 0 1 Transfer format Sxxx x lt CR gt lt LF gt readout Ln x 2 1 S E data valid R data with values x 3 5 overrange U no data calculated x 4 10 x 5 50 x 6 90 x 7 95 x 8 99 Status Instruction Code Parameter Comments Fetch status FS None Transfer format SSSS lt CR gt lt LF gt Status characters See table next page Measurement MF None Transfer format S lt CR gt lt LF gt finished status Status returned F gt Finished gt Not finished Note Status is cleared after reading Measurement MS Transfer format S lt CR gt lt LF gt status None Status returned R Running P Pause Not running Status Information Received with the FS Command Note 1st to 4th byte gives error codes for the 4 latest occurred errors i DECimal 64 90 91 92 93 95 96 97 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 ASCII cN TTI NK ESE TORO DOB BTA Sa eo ae Corresponding meaning OK no error Command unknown Option ext not present T O locked No marker table for given file No graphical data Graphical scaling error Device error No digit read Number is illegal Text string too long I
74. to extended version instruments only For basic version instruments no variable should be specified for these commands Calibration I O Commands Instruction Code Parameter Comments Select gain GA x x 0 10dB gain FSD 130 dB 50 mV Pa x 1 10dB gain FSD 120 dB 50 mV Pa x 2 10dB gain FSD 110 dB 50 mV Pa x 3 20dB gain FSD 100 dB 50 mV Pa x 4 30dB gain FSD 90 dB 50 mV Pa Select sense CS x 84 0 lt x lt 15 9 Sensitivity in dB re 1V Calibration OP x x 0 OFF Note Requires a hardware update tone control X 10N Measurement Control I O Commands Instruction Code Parameter Comments Start a ST None measurement Stop a SP None measurement Continue a CO None measurement Pause a meas PA None urement DMax handling DM x 0 display normal Max value 1 clear and display AMax value Select deselect ATx 0 Relative time absolute time 1 Absolute time Polarisation VS x 0 Polarisation voltage off OV voltage on off 1 Polarisation voltage on 200V Measurement MC None clear READY mode Measurement Setup I O Commands Instruction Code Parameter Comments Select network BW x x 0 A network amp C Used to select network for transfer com x 1 C network amp A mands too x 2 Anetwork amp C A Select time TCx x 1 F constant KH 255 x 3 1 Memory Handling I O Commands Instruction Code Parameter Comments Select di
75. tor you should use INc and DEC to adjust the sensitivity until the cor rect level is indicated by the Nor 116 6 Once the setting is correct push EN TER to return to normal display mode The microphone cartridge normally sup plied with the Nor 116 is of the free field type i e it has been designed to compen co sate for its own influence on the sound field To neutralise this when inserting the cartridge in a closed coupler like the sound calibrator the Nor 116 level must be adjusted to a value 0 2dB lower than the calibrator output level Example The output level of the sound calibrator Nor 1251 is 114 dB The Nor 116 should then be adjusted to 113 8dB Similarly when used with other brands of precision calibrators if the output level is 94dB adjust the Nor 116 to 93 8 dB and so on If you know the microphone cartridge sensitivity you may key this in by means of the NUMERICAL KEYPAD However doing so will never replace calibration with a sound calibrator as the sensitivity adjust ment procedure will neither detect micro phone preamplifier nor extension cable malfunction Note Sometimes you may enter the cali bration menu unintentionally Do not press exit to leave the menu Use enter instead The exit key will be interpreted as a numerical in put and will alter the sensitivity value You may then end up with a sensitivity value of OdB re 1V Pa Measured levels will be wrong and the full scale se
76. tting will refuse to be set to 120dB Re enter the menu key in 26 0dB as sensitiv ity and recalibrate the unit The sound calibrator is mounted on the microphone Press cat to enter the calibration mode Bargraph showing the C weighted sound pressure level Sensitivity C weighted sound pressure level measured with time constant F Numerical inputs expected N Norssnic Type 116 Calib 120 AINE C U E gt em I Pl er STOP FUNC To NETW uy Fmax aest z ast pen Fant caL serue ex Integrating Sound Level Meter IEC 651 804 Typo 1 Setting the Full Scale Deflection The display for this task Full scale deflection is indicated here Impossible to set 120dB as full scale The full scale deflec tion range available depends on the microphone cartridge sensitivity setting in the calibration menu Check if you got that right see the note at the bottom of the left page of this page spread Note The input gain full scale deflection is a destructive parameter in the sense that any alteration will cause a loss of data already acquired but not yet stored How ever the Nor 116 will prompt you to confirm your intentions if you attempt
77. umber of periods available is closely connected with the amount of free memory available Remember that logging two parameters as L t occupies twice the amount of memory as logging just one parameter Ta remember the old days when you recorded the level versus time on a paper roll using a level recorder Now you can do this electronically with your Nor 116 provided that it is equipped with the L t extension The Nor 116 will then divide the meas urement into periods of equal length de fined by the time resolution and log the time profile of Loy L and L EQ A MAX A PEAK C Units equipped with the advanced L t ex tension can log the time profile of any of the parameters available There are differences in when a param eter actually is measured see the graph to the left Now which resolution should you use Before making up your mind about this you should consider your needs for infor mation For example which parameter s are you going to log as L t For how long time will you be measuring The Nor 116 will log global values dur ing an L t measurement as well The Lig of the entire measurement will always be measured alongside with the percentiles if applicable to your unit and the parameter s you set up to be logged as L t Setting up an Extended Version Instrument f your instrument is an extended ver sion instrument equipped with at least Extension 2 the Level vs Time mode the M
78. within two minutes to preserve the contents of the internal memory See overleaf for more on this Note If you for any reason leave the unit without batteries for a prolonged time and or you install NiCd rechargeable batteries it may happen that the instrument fails to respond to attempts to switching it ON If so wait approximately half a minute before you try again A Few Words on Batteries ik Nor 116 comes with two 6LR61 nine volt batteries Battery lifetime is typically 8 12 hours depends on meas urement mode and brand of batteries If you switch to lithium batteries the life time will increase to 15 20 hours The use of alkaline or lithium batteries is strongly recommended to avoid leakage The very first time batteries are inserted the display will show the text Memory error indicating that the memory con tents have been corrupted Press ENTER to continue This will clear the entire memoty If fresh batteries are not inserted within two minutes after the old batteries were taken out the memory will become cor rupted indicated by the text Memory er ror in the display If so follow the above procedure Memory contents will be lost entirely Rechargeable batteries may also be used but with reduced operating time Con necting an external DC source 11 25V to the instrument will not charge re chargeable batteries but power the in strument in lieu of the internal batteries When the
79. yncro Use D to select directory name 90 Keyboard Lockout and Simulation I O Commands Instruction Code Parameter Comments Lock keyboard LL None Active keyboard LO None Keyboard simulation Kx 1sx lt 38 1 INC 20 BATT 2 gt 21 TBL 3 gt 22 ENTER 4 lt 23 EXIT 5 DEC 24 SETUP 6 RECALL 25 CAL 7 CLEAR 26 0 8 lt 27 1 9 START 28 2 10 NETW 29 3 11 TC 30 4 12 STORE 31 5 13 FUNC 32 6 14 PAUSE 33 7 15 ABS 34 8 16 DMAX 35 9 17 LT 36 18 STOP 37 19 PRINT 38 DEL Instrument IR None software RESET L t Setup I O Commands i Instruction Code Parameter Comments Short period time UN x x 16 125 ms selected 16 128 0 125 n 128s 1 lt x lt 127 n 128s selected Recorded values UR xy 1 lt x lt 12 x settings for advanced L t extension on off y 0 Selected parameter OFF 01 A SPL 02 A Leq 03 A Max y 1 Selected parameter ON 04 A Min 05 A SEL 06 A Peak 07 C SPL 08 C Leq 09 C Max 10 C Min 11 C SEL 12 C Peak 1 lt x lt 28 x settings for advanced L t extension y 0 Selected parameter OFF including multiple time constant extension y 1 Selected parameter ON 01 AFSPL 02 ASSPL 03 AISPL 04 A Leq 05 AILeq 06 AF Max 07 A S Max 08 AIMax 09 AF Min 10 ASMin 11 AIMin 12 ASEL 13 AISEL 14 APeak 15 CFSPL 16 CSSPL 17 CISPL 18 CLeq 19 CILeq 20 CFMax 21 CS Max 22 CIMax 23 CFMin 24 CS Min 25 CIMin 26 CSEL 27 CI Sel 28 C

Nor-116 User Manual - pt1

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