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Rion NA-28 User Manual - Acoustic Research Labs Pty Ltd

1. LE ON Press ENT key Lmax ON a a yy Select ON Na Lio ON Press ENT key LN3 L50 ON LN4 L90 ON LN5 L95 ON List ON Time Leve ON Measurement Screen O gt Z 01701 00 10 29 Display menu screen OCT amp BOCT ON Ge 0 0MB 00 00 00 Manuail 0852 120 MAX hold level is not shown for all pass indication MAX hold level is shown for each band for 1 second bs 250 dk 4k 1TbkH2 MEIE LAF AF 59 5 dB oct 16 Hz 45 6 dB E LCF AP 60 7 dE os 01 01 00 00 26 78 Measurement Delayed Measurement The NA 28 allows setting a delay time to be inserted before the actual start of the l Zi measurement Press the MENU key to bring up the menu list screen Select Measurement to bring up the measurement menu screen Select Delay time and press the ENT key Use the A V lt 1 gt keys to set the delay time The setting range is O to 10 seconds in l second steps When the time has been set press the ENT key Press the MENU key to return to the measurement screen MENU Wind Screen Correction ON Measurement Time 10 m Back Erase Ezi B Use A V lt 1 D keys to set time Lmax Lmin Type Trigger Mode y OFF Press ENT key Diffuse Field Correction ON Press MENU key to return to measurement screen SUB Channel y ON LN Mode Lp When delay time 0 to 10 s has been set measurement will start xx seconds after START STOP key was pressed Return C MENU Measurement Screen C gt
2. G Oe VY To turn the backlight off before the automatic turn off point press the LIGHT MENU key POWER key key The Bright setting for backlight brightness will reduce battery life by about 50 percent and the Dark setting by about 10 percent When the backlight is kept on continuously battery life will be reduced to about 1 2 Use A V keys Use A V keys DC OUT to select Comparator N to select Comparator y Backlight Auto Off USB Communication Backlight Brightness USB Communication Remote Control 8 8 Remote Control Press ENT key Bright Press ENT key Backlight Brightness i 30s Backlight Auto 0f f 30s A Beep oF Bright Beep is displayed 8 EWE is displayed 1 Cont Use A V keys Use A V keys a a Measurement Screen O gt then press ENT key Measurement Screen then press ENT key E 01 01 00 11 06 E 01 01 00 11 06 I O menu screen I O menu screen 21 Preparations Sub Channel Settings To use the sub channel you must make certain settings on a menu screen 1 Press the MENU key to bring up the menu list screen 2 Use the A V lt 1 D gt keys to select Measurement and press the ENT key The measurement menu screen appears 3 Use the A V lt 1 gt keys to select Sub Channel and press the ENT key The sub channel menu appears next menu level 4 Use the A V keys to set Sub Channel to ON 5 Set the required frequency weighting and time weighting character 1StICS
3. Output voltage V 110 100 90 80 70 60 50 40 30 20 10 FS 10 Scale dB FS Full scale value When the NA 28 is set to the calibration mode the output signal level range upper limit 6 dB is 2 85 V Using this feature will reduce battery life by about 30 percent 105 Input Output Connectors TRIG IN COMP OUT jack The TRIG IN COMP OUT jack is located at the bottom of the unit Bottom view TRIG IN COMP OUT A connection diagram for the TRIG IN COMP OUT jack is shown below The optional splitter adapter CC 59 is required for using the TRIG IN COMP OUT jack 2 5 dia mono jack Bottom of NA 28 TRIG IN COMP OUT jack TRIG INO y COMP OUT O COM MAIN TRIG IN SUB COMP OUT 2 5 dia mono jack If the output cable CC 24 monaural plug is used the connection functions as trigger input 106 Input Output Connectors TRIG IN Trigger input O to 5 V logic level signal falling edge trigger pulse width ms or more Logic level OV feat Pulse width gt 1 ms COMP OUT Comparator output approx 480 Q r Comparator output Tr Open collector Maximum applied voltage 24 V DC l l l l l l l l Maximum drive current 50 mA DC Signal output continues for 1 second after level falls below threshold ls Comparator level Time 107 Default Settings The factory default settings of the unit are listed below Calibration MO
4. gt p 0 001 100m Output voltage Vrms 10m 90 80 70 60 50 40 30 20 10 FS 10 Scale dB FS Full scale value 104 Input Output Connectors DC OUTPUT 1 Press the MENU key to bring up the menu list screen 2 Usethe A V 74 lt P gt keys to select I O Input Output and press the ENT key 3 Use the A V lt 1 gt keys to select DC OUT and press the ENT key 4 Use the A V lt 1 P keys to select MAIN SUB and press the ENT key The signal is available at the DC OUTPUT jack on the bottom of the unit It is derived from the main channel signal when you select MAIN or from the sub channel signal when you select SUB The level converted signal is obtained by frequency weighting rms detection and logarithmic compression using the frequency weight ing and time weighting settings of the unit Output voltage 3 0 V at scale upper limit 25 mV dB Output impedance Approx 50 Q Load impedance 10 kQ or more Suitable cable Output cable CC 24 BNC RCA cable The relationship between the display value shown by the NA 28 and the output voltage is indicated below
5. 6 Press the MENU key to return to the previous screen Press the START STOP key to return to the measurement screen MENU MENU Select sub channel measurement Wind Screen Correction EE oa Display ON OFF by pressing ENT Measurement Time Frequency weighting SUB Back Erase Time weighthg SUB or gt key Delay Time Lpeak Ltm5 Use A V keys to select ON Lmax Lmin Type Trigger Mode W Press ENT key Diffuse Field Correction Set M o LN Mode Frequency weighting Time weighting Lpeak Ltm5 Return amp gt Return amp gt in the same way Measurement Screen O gt Measurement Screen O gt E 01 01 00 09 58 E 01 01 00 11 53 Measurement menu screen Sub Channel menu screen There is no frequency analysis function for the sub channel Only the all pass value is measured 22 Preparations Trigger Mode Settings The NA 28 offers a trigger mode whereby measurement is initiated by one of three kinds of trigger time trigger time controlled triggering level trig ger sound level controlled triggering and external trigger triggering by an external signal Time trigger Measurement is controlled by a start time and stop time setting Setting items Trigger start time trigger stop time Trigger interval OFF 5 10 15 30 minutes 1 8 24 hours Sleep mode ON OFF Level trigger 1 Measurement starts when trigger level is exceeded and ends after a preset duration Setting items Trigger level 25 to 130 dB 1 dB steps T
6. AC OUTPUT jack DC OUTPUT jack Cover This cover protects the connectors on the bottom during transport or stor age Removing the cover gives access to the connectors shown above External power supply jack The supplied AC adapter NC 94A can be connected here for powering the unit from an AC outlet To prevent the risk of damage do not use any AC adapter other than the specified type TRIG IN COMP OUT jack Allows input of an external trigger signal and output of a comparator signal AC OUTPUT DC OUTPUT jacks AC OUTPUT An AC signal with frequency weighting is output here DC OUTPUT A DC signal corresponding to sound pressure level is output here USB port Serves for connection to a computer or a USB printer Controls and Functions Rear View Name plate Shows various information including model number of the unit microphone number preamplifier number serial number and date of manufacture Tripod mounting thread The unit can be mounted on a camera tripod using this thread Battery compartment Four batteries IEC R14 size C are inserted here Preparations Power The NA 28 can be powered by four IEC R14 size C batteries alkaline or manganese or the AC adapter NC 94A Rechargeable batteries may also be used but the NA 28 does not have a facility for charging the batteries When the AC adapter is connected the unit will be powered from the adapter also when batteries are inserted
7. Indicator LED Indicates the operation status of the unit by red blue and green flashing Controls and Functions LEVEL A V keys Level range switching keys Serve for selecting the level range for measurement In sound level meter mode the following six settings are available 20 to 80 20 to 90 20 to 100 20 to 110 20 to 120 30 to 130 dB In analyzer mode the following six settings are available 10 to 80 O to 90 10 to 100 20 to 110 30 to 120 40 to 130 dB A V7 lt 1 P keys These four keys serve for selecting and setting items on menu screens Holding the A V keys down causes a fast change ENT key Enter key Press this key to make or finalize the setting of an item in a menu or any other setting When the key is pressed at the sound level measurement screen the menu list screen comes up POWER key Turns power to the unit on and off The key must be held down for at least 1 second to take effect FREQ WEIGHT TIME WEIGHT keys The FREQ WEIGHT key selects the frequency weighting characteristic The TIME WEIGHT key selects the time weighting characteristic The keys select the frequency weighting and time weighting characteristics for the main channel Frequency weighting and time weighting charac teristics for the sub channel are selected using a MENU key LIGHT key This key turns on the display backlight for easier reading in a dark loca tion Press the key again to turn the backlight off When the automat
8. NA 27RC1 122 START STOP key Serves for starting and stopping the mea surement PAUSE CONT key Serves for pausing the measurement When the back erase function 1s enabled data from a short interval before the key was pressed are excluded from processing LEVEL UP DOWN key Allows changing the level range FAST SLOW 10ms keys Serve to select time weighting characteristic for the main channel Lp Leg LE Lmax Lmin keys Serve to switch the measurement results shown on the display STORE key Serves to start stop the storing of data in internal memory A C keys Serve to select frequency weighting char acteristic for the main channel A A weighting C C weighting PRINT key Serves to print the content shown on the display or data stored in memory using an optional printer Optional Accessories Insert two IEC R03 size AAA batteries LRO3 or R03 into the battery compartment on the rear of the remote control 1 Pull the cover of the battery compartment down while pushing on the section marked with the V symbol 2 Insert two IEC RO3 size AAA batteries taking care to observe cor rect polarity 3 Replace the cover of the battery compartment Rear Battery compartment Take care not to reverse the and polarity when inserting a battery Always use two identical batteries and replace batteries only as a set Mixing battery types or old and new batteries can
9. The AC adapter has priority In case of a power failure or other interruption of AC power the unit will automatically switch to batter power and continue to operate Inserting the batteries 1 Open the cover of the battery compartment as shown below 2 Insert four IEC R14 size C batteries paying attention to the polarity as indicated in the compartment 3 Replace the cover Push in the direction of Four IEC R14 size C batteries the arrow to open R14P R14PU or LR14 Preparations Take care not to reverse the and polarity when inserting the batteries Always replace all four batteries together To prevent the risk of damage do not mix old and new batteries or batteries of different type To prevent the risk of battery fluid leakage re move the batteries from the unit when the unit is not used The life of a set of batteries depends on usage conditions and various other factors Some reference values are shown below Battery life at 23 C Alkaline batteries LR14 16 hours Manganese batteries RI4PU 6 hours With alkaline batteries keeping the display backlight continuously ON will result in a battery life of 10 hours When additional processing is ON battery life will be about 20 percent shorter Battery life may also be shorter when the optional filter is operating AC adapter Connect the AC adapter as shown below To prevent the risk of damage do not use any AC adapter other th
10. 0000 RTA mode Sampling cycle ccceeeeeeeeeees 100 ms LCC aa E E E E E ON TP OU Teen E OFF DC OUT eee daananodetadiontenseaane OFF RAS CCE MOU canara taecascosusdvensacdactessutceaenautnmants OFF Gish ee a e eee ree ere eee rr ey eee ere ret 70 OS AE NEE A A NA sane Trigger band Oct or 1 3 Oct eee eeeeees MAIN AP Trigger band RTA scsscisincticdeaatencaertecdcansiemntatis MAIN AP Tricor Start UNE esris rR 01 01 00 00 Trierer SIOD UMC gra trsncateendeatavatiericnieenvints eee 01 01 00 00 Time trigger interval cccecnwininieed wusmaeeaomonciacenaess OFF Comparator OUtput sesesseeseesseeseessesserssessees OFF Comparator level nnssenseessesseeseessesserssessees 70 Comparator band Oct or 1 3 Oct eee MAIN AP Comparator band RTA ccccceeceeeeeeeeeees MAIN AP USB Onin Cation i605 econ tanesetettsreesotstionnen OFF Remote coniro setae ceceaanthraccomiadeiautiaesccws OFF Back light auto off sasericansapitecerisual teehee 30 sec Back light Brightness ccceeeceseeseeeeeeeees Dark PCCP PE EE L E EE A ON TOE e ce Te ete l When you turn power to the unit on while holding down the Start Stop key the unit will be initialized to the above settings When wishing to set the unit to the factory default values select menu gt system Read Save Set ting gt Load Default and then press the ENT key The time and memory contents are not reset 109 110 Load
11. CO an E 47 DY SEC i EE E E EAE E SE 47 BEDI ee E cuenta 50 VO Hipu OUO eee 5I O A E A E EEEE E E EE TE 53 Meas rem Ni ocscacanscaccasctorscisoenccucutereancenteaceesacersatetceeeseaesets 54 EG a E E 56 Ca E E P S EEE E EE 57 TNC AS Ue NG ae E E E ANTE 59 Sound Level Measurement 5 6 0 0025scecnscadsnanesiaceartasietsbivinascaycansads 59 Sound level sound pressure level 0 s ccisscusessetesentseiamaialondns 59 Equivalent Continuous Sound Level Leq Measurement 61 Sound Exposure Level Lag Measurement 0 c000 66 Maximum Sound Level L and Minimum Sound Level L Measurement 68 Sclecu ne the Laad Lon WY OC eea aree 70 Percentile Sound Level Ly Measurement 0060 71 Additional Processing Value Lpeax Latms Measurement 73 Back Erase a 486 6 Meee en ee ee ee eee er a 76 DEAT E E E E ENE EN E E E E A A T Mo TONG a cecarieerocnsonadons E S E 78 Delayed Measurement sivicesdcactssasectdnascadidesapssepnssaianeesotexedans 79 SCO CFC BAO e E E A 81 Inserting and Removing the CF Card cece ceecceseeeeeeeeees 84 IVA AA oo eccene teacup geass A N E E E 85 Memo SCOR e E A E 85 AUOT r E E E E E 91 AO E E E E E A E 97 Moon C EE E E 99 Using a memory Card ican iancnersdaaddasteedewannnoueesssadsantccnesncdata 99 Input Output Connectors sseeseesserssesseessesserssesserseesserssessersses 103 ACOUIPU Teee S 103 DOUTO T e E E E 105 TRIG IN COMP OUT FC aiccc
12. Information Mode Version 1 00 lt Program version of unit Optional Program Model Version NX 28BA 1 01 lt Shown if an optional program is installed Program Operation O gt STORE Return C MENU Measurement Screen O gt START Z 01701 00 00 46 System Program Information screen Language H amp English Deutsch Espa ol French Refer to page 32 CF size MByte Shows the remaining free space on the CF card 49 Reading the Display Display Use the A V lt 1 P gt keys to select Display and press the ENT key The display menu screen appears MAX Hold ON OFF can be selected in analyzer mode Leq ON OFF LE ON OFF Lmax ON OFF Lmin ON OFF LN1 LOI to L99 ON OFF LN2 LOI to L99 ON OFF LN3 LOI to L99 ON OFF LN4 LOI to L99 ON OFF LN5 LOI to L99 ON OFF List ON OFF Time Level ON OFF To set the LOI to L99 value for LN1 to LN5 use the A V keys to change the value and the ENT key to accept When you next press the ENT key ON OFF is displayed Use the A V keys to select the ON OFF setting and the ENT key to accept MENU SNUR WS ON a 0 0K 00 00 00 Manuat 0500 MAX Hold OFF Leq ON LE ON Lmax ON MAIN Lmin ON A LNI L05 ON Setting range LO1 to L99 LN2 ON 7 LN3 50 Mg lt Set percentile sound level z dB LN4 i LN required for 66 5 LAE 63 7 LLNS 72 8 LAFmin 54 3 measurement to ON 60 6 LAF1
13. MAN_ K000 Return O gt MENU Return O gt MENU Measurement Screen O gt START Measurement Screen O gt START E 01 01 00 10 39 E 01 01 00 10 39 Press the START STOP key to return to the measurement screen To store the sound level to store processed values only skip steps 8 and 9 and proceed directly to step 10 Bring up the sound level screen Store Operation 9 Specify the store address The currently selected address is shown on the screen If the address is shown in red it already contains data Take care not to overwrite data that you want to keep The A V keys can be used to specify the address in the range from 0001 to 1000 Any data already present in the selected address will be overwritten erased and replaced by the new data For informa tion on how to check existing data see the section Recalling Stored Data on page 88 SLM WS ON gt 128MB 00 00 07 Manual E 80 0 LCF 80 0 01 01 00 05 33 10 Press the STORE key The sound level at this point will be stored If processing was being carried out the processed values at the point where the STORE key is pressed will also be stored The store process takes about 1 second When it is completed the address is incremented by one step which allows you to store multiple data simply be pressing the STORE key repeatedly The stored data includes the following information date and time when STORE key was pressed date and
14. Memory MANUAL 2006 02 26 15 22 MANUAL 2006 02 26 15 22 CF card AU1_2345 2006 02 28 16 15 AU1_3333 2006 02 29 18 06 the data yes gt ENT No PAUSE Do you want to erase Copy to CF Card STORE Copy to CF Card C gt STORE Delete Data GY Delete Data 5 gt Return C MENU Return O gt MENU Measurement Screen C gt START Measurement Screen C START Z 01 01 00 00 28 Z 01 01 00 00 28 Select data to erase with A V keys and press CAL key 90 Auto Store Operation Sound level meter mode ae sgr Lmax Linin aTe stored as 1 set of data every 100 ms Using a CF card the maximum measurement duration is 1000 hours and using the internal memory 3 hours Analyzer mode The level for each band and L are stored continuously on the CF card gt P 82 The procedure for storing data using Autol mode is as follows If a CF card is to be used verify that the card is inserted in the card slot before starting the measurement l 2 3 4 Turn power to the unit on Press the MENU key to bring up the menu list screen Use the A V lt gt keys to select Store and press the ENT key Use the A V keys to select Store Mode and press the ENT key Then use the A V keys to select Autol and press the ENT key Use the A V keys to select Store Name and press the ENT key Use the A V keys and gt key to specify the store name and press the ENT key 91 Store Operation 6 Use the A V
15. START 01701 00 09 58 Measurement menu screen START STOP key pressed Measurement start Preset Leg ie delay time Time 79 Measurement When the trigger function 1s also used the start of measurement will be delayed by the preset delay time from the trigger event point START STOP key pressed Measurement start Trigger event Trigger standby Preset Leq time delay time Time When a delay time has been set the NA 28 will operate as follows When the START STOP key is pressed the measurement standby symbol W starts to flash When the delay time has elapsed the symbol changes to a flashing gt and the measurement starts When delay time is up Measurement standby symbol flashes measurement in progress symbol flashes MU WS ON gt 0 0NB Q 00 00 07 Manua 00000 SLM WS ON DE G gt 0 0NB Om 00 00 07 Marua 00000 MAIN LAF 80 0 LCF 80 0 01 01 00 05 33 ime 01 01 00 05 33 Measurement screen Measurement screen 80 Store Operation The NA 28 can store measurement data processed data such as sound level and equivalent continuous sound level and measurement parameters such as frequency weighting and time weighting characteristics in the internal memory or on CF card This chapter describes how to store data in memory and how to recall data from memory There are three different ways of storing data as listed below Manual In this mode the operator
16. aa a NTA a aaa Tn mT a TE Ta a E O T a j j 3 0 0 5 Q Q Q T j j SC a a a a a J J J J J J J J J J J J J J J J OOOO O0 J I 11 I I 11 J J m j Z 2 q T E g 0 2 E 0 z 7 j 0 Lorri om 01701 00 01 17 Numeric display OCT screen Numeric display 1 3 OCT screen OCTE amp BOCT ON oe 0 0MB OO 00 00 Manual 000001 EE m A MATH LAF 69 0 gE Fred iHz 1730ct idb oct db 12 5 a1 raU 99 0 Frequencies that are currently not displayed 91 0 can be called up with the I D keys al 103 0 109 0 6 0 gE 01 01 00 00 22 Numeric display OCT 1 3 OCT screen 0 Q mil 0 Q Q 0 0 Q O Q 0 iO O 45 Reading the Display Indicator messages When keys such as START STOP or STORE are pressed indicator messages such as shown below will appear on the display for about 1 second START STOP STORE 0003 PAUSE BACK ERASE CONT I NUE 46 When START STOP key was pressed and processing has started When START STOP key was pressed and processing has ended When STORE key was pressed store address is also shown When PAUSE CONT key was pressed and operation is paused When PAUSE CONT key was pressed during processing with back erase function set to ON When PAUSE CONT key was pressed and processing has resumed Ue WS ON gt 0 0MB 00 00 07 20000 01 01 00 05 33 Indicator message display
17. example Reading the Display Menu List Screen Pressing the MENU key brings up the menu list screen as shown below Use the A V lt 1 gt keys to select the desired menu and press the ENT key MENU Display 1 0 System Measu rement Print Store Recal Return gt MENU Measurement Screen C gt START ZI 01 01 00 03 13 Menu list screen System Use the A V lt 1 P gt keys to select System Language and press the ENT key The system menu comes up CF Card Format OFF EXEC can only be selected when CF card is inserted 1 Use the A V keys to select CF Card Format and press the ENT key 2 Use the A V keys to select OFF EXEC and press the ENT key MENU CF Card Format OFF Symbol shows that vi a lower menu level exists Time setting W Use A V lt D keys Program Informat ion Y to select the item and press the ENT key Language English CE size 24 MByte The next menu level appears Return C gt MENU Measurement Screen O gt START System menu screen 47 Reading the Display Read Save Setting Y Bring the cursor to Read Save Setting and press the ENT key The System Setting screen appears Mi Svctem Sett ing Mi Svcten Sett ing Save Load Default List of Setting Group on GF No 1 2005 12 08 08 35 Group Date No 2 2005 12 09 09 55 No 3 2005 12 15 11 33 No 4 2005 12 25 17 06 No 2005 12 30 15 00 5 Group Save v Group Loading Delete for CF fy Lo
18. gt keys to select Time setting and press the ENT key 5 Use the A V keys to change the setting of the selected item 6 Use the ENT key to switch to the next setting item Year Month Day Hour Min Sec 7 Use the A V keys to change the setting of the selected item Press the ENT key to terminate the setting The clock starts moving with the new setting 8 Press the START STOP key to return to the measurement screen The clock IC used in this unit has an error of about 1 minute per month Before measurement be sure to check and set the time if required START STOP STORE PAUSE CONT OO Ge gt VE Be lt _ __ A VIK1 gt keys a ENT key Q TO POWE oy S O Di MENU key POWER key 18 Preparations MENU CF Card Format Read Save Setting y Eire v lt Use A VY lt D keys Program Information Y to select Time setting Language English d ENT k CF size 24 MByte anad Press ey Return C MENU Measurement Screen O gt START Z 01701 00 11 06 System menu screen Wi Svoten Time Setting Year Month Day o fab Use A TW lt I 2 keys O1 P 54 to select item to set Use ENT key to select digit Use A V keys to change value Press ENT key to move on Press ENT key to accept Return O gt MENU Measurement Screen O gt START ZI 01701 00 02 25 System Time Setting screen 19 Preparations 20 An internal rechargeable backup battery serves to ke
19. is completed changing the frequency weighting A C Z time weighting Fast Slow or other settings has no effect on the displayed processing results When you start another measurement the La max and L Amin Values are cleared Selecting the Lmax Lmin type AP All pass maximum all pass minimum The analysis result applies to the point where the all pass level in the main channel was maximum or minimum BAND Band maximum band minimum The analysis result applies to the point where the level for each fre quency band in the main channel was maximum or minimum 1 Press the MENU key to bring up the main menu 2 Select Measurement and press the ENT key The measurement menu screen appears 3 Select Lmax Lmin Type and press the ENT key 4 From the indication Band AP select the desired setting and press the ENT key 5 Press the MENU key to return to the measurement screen HENIE Measurement Wind Screen Correction Measurement Time Back Erase Delay Time Select Lmax Lmin type Trigger Mode Diffuse Field Correction Press ENT key SUB Channel y eens Select Band AP Press ENT key Return O gt MENU Measurement Screen O gt START im 01 01 00 09 58 Measurement menu screen 70 Measurement Percentile Sound Level Ly Measurement The procedure for percentile sound level measurement is similar to that for equiva lent continuous sound level measurement but the menu item selection differ
20. lead to damage Remove the batteries from the unit if it is not to be used 123 Specifications Applicable standards General measurement law precision sound level me ters IEC 61672 1 2002 Class 1 IEC 61260 1995 Class 1 ANSI S1 11 2004 Class 1 ANSI S1 4 1983 Type 1 ANSI S1 43 1997 Type 1 JIS C 1509 1 2002 Class 1 JIS C 1513 2002 Class 1 JIS C 1514 2002 Class 1 IEC 60804 2000 Type 1 IEC 60651 1979 Type 1 were abolished in 2002 JIS C 1505 was abolished in 2005 Measurement functions In sound level meter mode main processing is per formed in main channel and sub channel Sub channel also allows additional processing In analyzer mode measurement is performed in main channel and sub channel Measurement modes Sound level meter mode Measurement items are listed below Main processing and additional processing is performed Analyzer mode Main processing is performed in main channel and sub channel Real time octave analysis and 1 3 octave analysis and all pass processing in main channel all pass processing only in sub channel 124 Measurement items Specifications Main processing sound level meter mode analyzer mode Simultaneous measurement of all items using selected time weighting and frequency weighting Sound level L Equivalent continuous sound level Leq Sound exposure level Lg Maximum sound level Las Minimum sound level Linn Percentile sound level Ly l to 99 l incre ment steps max 5
21. using the unit for commercial purposes or for certification official certification is required every five years Contact the supplier Dispose of the unit and of batteries only according to national and local regulations at the place of use To conform to the EU requirement of the Directive 2002 96 EC on Waste Electrical and Electronic Equip ment the symbol mark on the right is shown on the instrument xii Contents Organization of the NA 28 Documentation ccccceeceeeeeeeeeees 1 Organization of This IVA os cued arccsancueseumameramincaeueussvesewnameeesmen ill OO gira ese reyes ne E N E A EE E enera per monaesesenian l Controls and Functions essesseessesseessesserssesssrsserserssesserssesserssersees 3 TEONE N IOW areae E EEE REES 3 Microphone Preampli Ber a ietascrsastacsicrnetctewaiuncoomciiainccaass 3 PID re rst ep E E E EE 3 Operation key pane essersi E q Bottoni ViN apc easdcecen see rcicnte cecteteneneseenstinaded aaantudininene seeetadaedlenete 7 FRO o E E EE E E E E sts 8 PEC DACA MOUS eee E O E E O ETE E 9 OWL E E EN E EE E EE 9 PA ACE E E E E 10 Windicrcen W S210 eeen EEE EET E 11 Diffuse Field Corr cti N ssasenswesaiincdassoaaeaeaeawenctssancctbudemcesaaibadebus LZ Tripod AV VO MIAI Go arcaccas rarities cen aastuctncunn comes iwaedamnnsenaniateh tains wenaiias 12 Memory Cards CF Card and Program Cards ccecceeee 13 PSC TUDE AUC ATC vexetetesou tire E E 13 Microphone
22. values calcu lated from L or Leq isec Additional processing sound level meter mode only In sound level meter mode one of the following can be added to main processing Peak sound level Leak Takt max sound level Lims Frequency weighting characteristic is the same as for the sub channel 125 Specifications Measurement time Processing time 1 to 59 seconds 1 to 59 minutes 1 to 24 hours Processing types in each operation mode Main processing l processing Chame Main sw Ad Frequency weighting A C Z A C Z SLM Time weighting F S 10 ms F S 10 ms fe Linar Linin Ly re Laan Ly Frequency weighting A C Z A C Z OCT Time weighting F S 10 ms F S 10 ms I is Measurement values Lyi Le Leg Dass Le Microphone and preamplifier Microphone UC 59 Sensitivity 27 dB 2 dB re 1 V Pa Preamplifier NH 23 Measurement level range A weighting 25 to 130 dB C weighting 33 to 130 dB Z weighting 38 to 130 dB Upper limit for peak sound level measurement 143 dB ETAN Los Lipi Ly Inherent noise A weighting max 17 dB C weighting max 25 dB Z weighting max 30 dB Measurement frequency range 10 Hz to 20 kHz Analysis frequency range Octave analysis 16 Hz to 16 kHz 1 3 octave analysis 12 5 Hz to 20 kHz With simultaneous octave and 1 3 octave analysis Octave analysis 16 Hz to 8 kHz 1 3 octave analysis 12 5 Hz to 12 5 kHz 126 Specifications Frequency weighting A C Z Time weighting Main channel F S 10 ms Sub channe
23. weighting and time weighting 2 Press the START STOP key to set the unit to the measurement con dition 3 The FREQ WEIGHT TIME WEIGHT LEVEL V and LEVEL 4 keys now function as markers Pressing a key will insert the corre sponding marker into the data 4 Wait until the measurement time has ended or stop the measurement with the START STOP key 5 Select the recall mode on the main menu and press the ENT key 6 On the file selection screen use the A V keys to select stored data and press the ENT key A recall screen such as shown below appears showing the marker information KOCT WS ON oe 0 0NB 00 00 00 Manual 0234 START STOP STORE a Maker 4 A o LEVEL Q Gn D gt o D Q Marker 2 POWER LIGHT SE m Marker 1 orange Marker 2 light blue Marker 3 green Marker 4 purple 1 30ct 1 kkz 8 dB ee O01 00 01 43 T L display screen 77 Measurement Max Hold This function retains the maximum value for one second for easier reading of the changing bar graph indication 1 Press the MENU key to bring up the menu list screen 2 Select Display to bring up the display menu screen a Select MAX Hold and press the ENT key 4 Select ON and press the ENT key 5 Press the START STOP key to return to the measurement screen The MAX hold function is not available for the all pass indication imc isola MAX Hold OFF Leq UE Select MAX Hold
24. 0 60 0 62 3 LAF90 63 8 66 4 Time Leve Return gt MENU Measurement Screen G gt START L O1 01 00 10 29 02 26 15 55 28 Display menu screen List display example Shown when switching mode with List set to ON 50 Reading the Display I O Input Output Use the A V lt 1 gt keys to select I O Input Output and press the ENT key The Input Output menu screen appears AC Out OFF MAIN SUB DC Out OFF MAIN SUB Comparator Y ON OFF USB Communication ON OFF Remote Control ON OFF Backlight Brightness Dark Bright Backlight Auto Off 30 s 3 m Cont Beep ON OFF Index 1 to 255 a number for identifying the unit when multiple units are used in a parallel measure ment setup Press the ENT key to display ON OFF etc Use the A V keys to select ON OFF etc and press the ENT key When beep tones are set to ON a long beep will be heard at the end of a measurement and a short and long beep when a store operation is complete DC OUT Comparator W USB Communicat ion Remote Control Backlight Brightness Backlight Auto Of f Beep Index Return O gt MENU Measurement Screen O gt START Input Output menu screen 51 Reading the Display Comparator menu level Use the A V lt gt keys to select Comparator and press the ENT key The following menu appears Comparator ON OFF Comparator Level 25 to 130 dB 1 dB steps Comparator Band SUB AP MAIN AP 12 5 Hz 16 Hz 20 Hz 25 Hz 20 kHz 1 3 oct
25. 0 ON LN3 L50 ON LN4 L90 ON LN5 L95 ON List ON Time Leve ON Measurement Screen O gt Display menu screen Press the START STOP key to return to the measurement screen For information about how to use the back erase function to exclude data refer to page 76 Press the START STOP key to start the measurement At this point previous measurement values are cleared While the measurement is in progress the symbol flashes and the elapsed time is displayed When the measurement time set in step 9 has elapsed the measurement is terminated automatically To terminate the measurement before the allocated time press the START STOP key If signal overload or an under range condition occurs at least once during measurement the indication OVER or UNDER appears to indicate that overload or under range data are comprised in the processed values During measurement the LEVEL A V keys FREQ WEIGHT key and TIME WEIGHT key function as markers The START STOP key MODE key PAUSE CONT key LIGHT key and POWER key are operative Be sure to complete all settings before starting the measurement Measurement During measurement the PAUSE CONT key can be used to pause and resume the measurement During pause the pause symbol II is shown The paused interval and the back erase interval are not included in the measurement time If the back erase function was enabled in steps 7 and 8 using the Time Level screen is conven
26. 0001 This symbol is shown BE when a CF card is inserted MAIN LA F 80 0 LCF 80 0 01 01 00 05 33 84 Store Operation Manual Memory Store At the point where the STORE key is pressed the current sound level and processing values are stored Immediately after turning power on there will be no processing values therefore only the sound level is stored when the STORE key 1s pressed If no CF card is inserted data will be stored in internal memory If a CF card is inserted data will be stored on the CF card The procedure is as follows 1 Turn power to the unit on 2 Press the MENU key to bring up the menu list screen 3 Use the A V lt 1 gt keys to select Store and press the ENT key The store menu screen appears 4 The store mode is shown Use the A V keys to select Store Mode and press the ENT key or gt key The Store mode setting is shown MENU Manua Return O gt MENU Measurement Screen O gt START Store menu screen 85 Store Operation 86 5 Use the A V keys to select Manual and press the ENT key 6 Specify the store name 6 1 Use the A V keys to select Store Name and press the ENT key 6 2 Use the A V keys to specify the first two digits and press the ENT key 6 3 Press the ENT key or the gt key to move to the next two dig its 6 4 Use the A V keys to specify the final two digits and press the ENT key Store Mode jei Store Name
27. 10 ms Main channel frequency weighting Indicates the main channel frequency weighting characteristic A A weighting C C weighting Z Flat response Measurement in progress symbol When a measurement is in progress the symbol flashes The indicator LED also flashes in green During auto store the gt symbol also flashes The indicator LED flashes in red During measurement standby the W symbol is shown During measurement pause the Il symbol is shown The indicator LED flashes in blue Elapsed time Shows the elapsed time in seconds during processing and during memory store Back erase ON Indicates that the back erase function has been set to ON Measurement time setting Shows the measurement time that has been set with the menu The avail able setting range is 1 sec second to 1000 h hours Analyzer mode Indicates the condition of the display screen SLM Sound level meter OCT Octave band analyzer 1 30CT 1 3 octave band analyzer OCT amp 1 30CT Octave and 1 3 octave band analyzer Windscreen correction OFF symbol is shown when windscreen correction is OFF ON symbol is shown when windscreen correction is ON Reading the Display Trigger mode Controls the measurement and memory store start behavior Available modes are Levell Level2 Time and EXT Diffuse sound correction Indicates that the unit has been set up for measurement in a diffuse sound field 43 Reading the Display An
28. 12 25 17 06 No 5 2005 12 30 15 00 Group Save for CF N Group Loading Delete for CFly Load Setting O Save Setting Setting Group SET_ an Use A V keys Delete Setting O gt a cancel PE 0 521 SOUP DAMS Measurement Screen G gt Cancel G 2O 01 01 00 00 46 Select Group Save for CF and press ENT key Press ENT key to save 114 Optional Accessories Microphone Extension Cables EC 04 series For enhanced measurement accuracy the microphone can be detached from the unit and connected via an extension cable This will reduce measure ment deviations due to refraction effects and the acoustic influence of the operator Six different cable types with lengths from 2 to 100 meters are available as listed in the table below It is also possible to combine multiple cables Cable runs of up to 35 meters are supported for standard compliance With long extension cables the cable capaci tance restricts the upper measurement frequency and measurement level For details refer to the Technical Notes 115 Optional Accessories Printer Data gained during measurement and data stored in the memory of the NA 28 and on CF card can be printed out on a printer You can also produce hard copy of measurement screens The printer printer paper and printer cable are options To print measurement data turn the NA 28 and the printer on and set the printer to the online state The steps described in th
29. 8 Optional Accessories Level Recorder LR 07 LR 20A By connecting a level recorder to the NA 28 the sound level changes over time can be recorded Sound level recording The procedure for recording sound level changes over time is described below Turn power to the NA 28 and the level recorder on The steps described in the chapter Preparations page 9 should be completed For details about level recorder operation refer to the documentation supplied with the respec tive product l Use the MENU key to bring up the menu list screen select I O Input Output and press the ENT key Select AC OUT and press the ENT key Make the MAIN SUB selection main channel output or sub chan nel output Press the MENU key to return to the measurement screen Press the CAL key to set the unit to the calibration mode Internal Calibration DC OUT Select AC OUT Comparator y Press ENT key USB Communication Remote Control Backlight Brightness Select MAIN SUB output channel Backlight Auto Off Press ENT key Beep Index Press MENU key to return to previous screen Return amp gt MENU Measurement Screen gt START Input Output menu screen 119 Optional Accessories 120 6 Adjust the level control Level adj of the level recorder so that the pen registers at 6 dB from the top of the scale OoOddaddadq L 6 dB position Sound level meter scale upper limit 7 Press the CAL key onc
30. C 74 6 Insert the microphone very carefully and slowly all the way into the coupler Be very careful when inserting and removing the microphone to and from the sound calibra tor NC 74 to avoid a sudden pressure buildup which could destroy the membrane of the mi crophone 7 Set the power switch of the Sound Calibrator NC 74 to ON 35 Calibration 36 10 11 12 Press the CAL key If Internal Calibration is shown under the bar graph press the STORE key The indication will change to Acoustic Calibration Use the A V keys to adjust the reading of the NA 28 to the value shown below Sound Calibrator NC 74 94 0 Press the CAL key The measurement screen returns Turn off the Sound Calibrator NC 74 and the NA 28 Remove the microphone very carefully and slowly from the cou pler For details on the Sound Calibrator NC 74 refer to the documentation of that product SLM ESM a DOME If Internal Calibration is shown Acoustic Calibration press STORE key to switch to Acoustic Calibration HHI LAF 94 0 4B lt Use A Y keys to adjust to 94 0 dB Internal gt STORE O1 01 O0 00 45 Power On Off To turn the unit on Hold down the POWER key until the power on screen appears at least 1 second When the screen is shown release the POWER key After the unit has been initialized the measurement screen appears During initialization the indi
31. C 74 CF card Remote control NA 27RC1 USB printer Battery Pack BP 21 Optional program cards Architectural Acoustics Program Card tentative model name NX 28BA for measurement of sound pressure level differences between rooms heavy floor impact sound level light floor impact sound level reverbera tion time 133 Specifications ANY rN Rear View Unit mm Dimensional Drawings 134 No 50490 06 08
32. ECALL ENMMNF G gt 0 0MB piao NERS DA G gt 0 0MB piao NERS o DE gt 0 0MB 00 00 00 Manual 0234 00 00 00 Manual 0234 00 00 00 Manual 0234 30 30 30 dB O time x 1 199 dB O time x 2 dB O time x 3 599 SPEC LCF AP 66 3 dB SPER LCF AP SPOR LCF AP 66 3 dB 1 8oct 1 kHz 52 8 dB 1 80ct 1 kHz 1 30ct 1 kHz 52 8 dB m 01 01 00 01 43 e 01 01 00 01 43 m gt 01 01 00 01 43 Horizontal axis time x1 Horizontal axis time x2 Horizontal axis time x3 At the T L display screen of RECALL use the LEVEL V keys to change the time axis horizontal axis The zoom factor for the time axis can be set to x1 x2 x3 x6 x9 x12 and x15 57 Reading the Display Menu List Items System CF Card Format Read Save Settings W Time Setting W Program Information W Language CF size Display MAX Hold Leg LE Lmax Lmin LN1 LN2 LN3 LN4 LN5 List Time Level I O Input Output AC OUT DC OUT Comparator Y USB Communication Remote Control Backlight Brightness Backlight Auto Off Beep Index Store Store Mode Store Name Sampling Period SML RTA Measurement Windscreen Correction Measurement Time Back Erase Delay Time Lmax Lmin Type Trigger Mode W Diffuse Field Correction Sub Channel W Print Enable disable screen content printout Recall Sampling Period 58 Recall data list Load Default Group Save for CF card W List of setting groups on CF card Group Loadin
33. Extension Cables EC 04 series ccccceeeee eee 14 Connection to a FACE iosesacacousosesetcacacinraduastouss irom inieeuteuaen 16 Connection to a Level Recorder LR 07 LR 20A 000000 16 COMNeCHION TO a Compiler sacros e 17 Setting the Date and Time aipsssssidswarancrasaeabasansnoataseusrsquassacanesanes 18 Measurement in a dark location snssessessesserssessesserssessersses Zi SUD Channel Sene Seremi Ea E 22 EG Cer Mode SOUS peee Ee E E 23 SOOP MOOG oeer n E E E EN 26 Comparator CG s ien ete uts ia aceshiasdopecuantedenanen eiaa Emeran 30 About the comparator output accssideseeiasarasndesdaestuadwerensdentaned 31 Ee UA SCC CHOM E E E ces eaitasneen z xili X1V CA BANOO setts acco E N E 33 Electrical calibration c cinconacdevoriedaseecosectacoosneatotsevaiseaconeinees 33 Ponec c On O e a E E iv nauatiersteesaenaseeres 37 To CEG i th unit Osc asec saniagenoancanntaseesonteueisasenouecaneeaseernatensaes 5 To turn the unit off cesar sen ace separ pscusctnote savsinen sacdetearanccenotaas 38 R adinge the Display erreneren aani 39 Sound level meter mode Sre CM atacesecdecvaccesnsderesoaee snide 39 Analyzer mode screen 1x5 carccevininienavecserrnuhcasesedenapclndianaconetwedancanin 44 T L Time Level display screen sc coscivscrpccantiranesathesasedecardeacedaas 44 N meric display SC ee or sa ccnstrccre etn cseesaeceneaan th namcondieedelaednsenacie 45 Midicdtor MOSSA O S accra acdc irin 46 Meow LTSC
34. FF Sleep Mode as trigger mode Sleep Mode Set sleep mode an to ON Return amp gt MENU Measurement Screen START a 01 01 00 11 37 Return amp gt MENU Measurement Screen START im 01 01 00 11 37 Trigger menu screen Trigger menu screen Preparations In the measurement standby condition the indicator LED flashes in blue using the following pattern 0 1 second intervals en Lit Out Lit Lit Out Lit 27 Preparations 28 Level Trigger Setting l 2 Press the MENU key to bring up the menu list screen Use the A 7 lt P gt keys to select Measurement and press the ENT key Use the A V keys to select Trigger Mode Use the A V keys to select Level and press the ENT key Levell Measurement starts when trigger level is exceeded and ends when preset measurement time has elapsed Level2 A single measurement is carried out when trigger level is exceeded Use the A V keys to select the trigger level and use the A V keys to set the value 25 to 130 Then press the ENT key Use the same procedure to set the trigger band and press the ENT key When Levell trigger is used set the slope For Level2 trigger there is no slope setting When the setting is complete press the ENT key The unit returns to the screen that was active before the MENU key was pressed Press the START STOP key to return to the measure ment screen Preparations External Tri
35. INSTRUCTION MANUAL SOUND LEVEL METER NA 28 CW RION CO LTD 3 20 41 Higashimotomachi Kokubunji Tokyo 185 8533 Japan http www rion co jp english Organization of the NA 28 Documentation Documentation for the Sound Level Meter NA 28 comes in three parts as listed below Instruction Manual this document Describes operating procedures for the Sound Level Meter NA 28 connec tion and use of peripheral equipment such as a level recorder and printer and use of the memory card e Serial Interface Manual Describes communication with a computer using the serial interface built into the Sound Level Meter NA 28 The manual covers the communication protocol use of control commands for the sound level meter format of data output by the sound level meter and other topics Technical Notes This document provides in depth information about sound level meter performance microphone construction and characteristics influence of extension cables and windscreen on the measurement and other topics Company names and product names mentioned in this manual are usually trademarks or registered trademarks of their respective owners il Organization of This Manual This manual describes the features operation and other aspects of the Sound Level Meter NA 28 with 1 3 octave analysis function If the unit is used together with other equipment to configure a measurement system consult the documentation of all other
36. Internal Calibration 4 Use the A V keys to bring the level indication to the specified value 114 0 dB 5 When calibration to 114 0 dB is completed press the CAL key once more to return to the measurement screen SLM WS ON inp 0 OME o a eo 89 do 1994 Scale upper limit PR ee aah Internal Calibration must be shown Internal Cal ne 114 0 If level range upper limit is not 120 dB level range upper limit 6 dB flashes here LAF 114 0 Use A V keys to adjust to level range upper limit 6 dB 114 0 dB in this case 01701 O0 00 45 33 Calibration lemme WS ON DA gt O 0MB Scale upper limit 120 Internal Calibration must be shown C16 63 250 1k 4k 16kHz Internal Calibration i 114 0 lt _ ______ Tf level range upper limit is MAN not 120 dB LCF 114 0 dB level range upper limit 6 dB flashes here at x Volum oe eee Use A V keys to adjust to level range upper limit 6 dB _ 01 01 00 00 43 114 0 dB in this case Signal output for calibration of external equipment The normal level range setting for calibration is 30 to 120 dB but for calibra tion of external equipment another level range setting can also be chosen In this case xx dB flashes on the calibration value indication The calibration value will always be 6 dB below the upper limit of the level range setting Using the AC or DC output calibration of connected equipment c
37. N Print CF card AU1_0002 2006 02 22 08 15 AU1_0003 2006 02 03 08 55 AU2_0001 2006 03 01 08 25 Copy to CF Card gt STORE Delete Data 5 gt Return C gt MENU Return C gt MENU Measurement Screen C gt START Measurement Screen Ce START ZI 01 01 00 03 13 ZI 01 01 00 00 28 Menu list screen Stored data list 117 Optional Accessories 4 When you press the ENT key once more the recall menu list screen appears Select Print and press the ENT key 5 A display such as shown below appears If you want to print only a range of data select Data Range Print and specify the range Then select Execute and press the ENT key to start printing Press ENT key SLM WS ON o gt 0 0MB KAI Meru List 00 00 07 Manual 0333 Store File MAN 0122 1 0 MHIN LAF Store Measu Print rement 80 0 Return O gt MENU Measurement Screen C gt START 03 03 12 34 55 mm 01 01 00 03 19 Stored data screen Recall menu list screen Select Print and press ENT key SLM WS ON gt 0 0MB Pion 00 00 07 Manual 0333 Store Fi le MAN_ 01 22 MAIN Use A V keys to select items Press ENT key to print screen as is Press ENT key Specify print start address and print end address Press ENT key to print a a a a print start address 001 print end address 258 Execute Cance Shows date time when data were stored Press ENT key to return to store data screen 11
38. No and press STORE key Save settings dialog appears Press ENT key to proceed or wait about 5 seconds 113 Setup File Copying a setup file to CF card Up to five setup files can be saved in internal memory If you want to create more setup files or if you want to automatically load a setup file at startup the CF card can be used The NA 28 does not allow directly saving settings in a file on the CF card The settings must first be saved in internal memory as described in the pre ceding section and then the file s must be copied to the CF card 1 To copy settings as saved in step 3 above from internal memory to CF card select Group Save for CF card New enter group name SET_OOO0 This will cause a setup file to be copied to the folder NA 28 SETUP SET _ OO CO on the CF card The SET_OOO0O group folder can contain up to five NA28SETO rns setup files Up to 100 setting groups can be created on one CF card Consequently up to 500 different settings can be saved on a CF card 2 This completes the setup file to CF card copy procedure Provided that the correct folder name SET _OOO0 file name NA28SETO rns and file format is used the setup file may also be created with a text editor on a computer HERRE Svotem Sett ing Load Default No 1 2005 12 08 08 35 We Syvctem Setting Save List of Setting Group on CF Group Date No 2 2005 12 09 09 55 No 3 2005 12 15 11 33 No 4 2005
39. OS irc srrec putea nensresetace mania eruaueloncs Internal IVT R TA eiea E E E E SLM MOOO eee A E E Lp Main channel frequency weighting A Sub channel frequency weighting 66 C Main channel time weighting 00008 F Sub channel time weighting cccceeeceeeees F Level CAM eT WL SCANS srricsrsarde a 120 Meas rement UME sever stoysumensaeseymteeasstaneds 10 Measurement UITNIG sianesesrosaoresnssgrsccawobeasoxanaacsantes m ACK EAC E E TE OFF Delay TINS e a E Os Lo ai LY De outset erosion Band IVA MOU se sccasnencaimainedestecdanbaniengeamonarnnieasanecinnssaes OFF Windscreen COLE CHOON sic cer tnctsatecanienerereadens OFF Diffuse field compensation vcicsisescideedewssroerrraness OFF SUD CNAME as atta ene so sseens anoaecuceceeseinteateuelences OFF l E E E ON To E E S OFF NE E AEE E E A E ON I E O PN AEA E EE T A E E OFF i E EA AE E E E E S OFF i E E AE E EEEE EE OFF 1 E ONEA ET EEEE A E ON I E OE ANANE E OE E A es OFF I E r EEIE OFF Eeee E muienivaus sharoreavingesotminie avenge sdaaess ON T L Time Level CS Play ceccnvarwtansiendeucanascecdents ON Dieser NATE NA EE E A EE E ues 05 Desa AE EEA AE E E E 10 E EE OAA ate E E eehahuotaunedau ss 50 108 Default Settings Dey cepa peers AN E NITE EEE EENE EE A EE E E 90 N E LOPE I EE AA A A A T a 95 Additional processing Value ccsecceeeeeees Lpeak POR TOC 5 cece scene cane E OR Manual UO RS NATIE sssri ranar rS
40. TART STOP key gt MENU key 169 Ao G 0 SLM RTA key TOCA A V1 lt keys N Q ENT key POWER ou LIGHT 5 Cee D HSLS Select File Store Name Date Internal Memory Select store name with A V keys rd and press ENT key MAN_0122 2006 02 28 16 15 MAN_5555 2006 02 29 18 06 Copy to CF Card C gt STORE Delete Data Return gt MENU neasurenent Screen O gt START 1 01 00 00 28 OCT WS ON a 0 0MB RECALL WS on DA 0 OMB 00 00 0d 00 00 00 OOO00 MAN 0012 store File MAN 0012 Store File MATEY LAF 67 8 LCF E E J TE chk bEH 77 6 ae eae z oct 16 Hz 94 0 dB EE LCF 20 0 dE im 01 01 00 00 08 03 03 18 33 00 Recall screen sound level meter mode Recall screen analyzer mode 89 Store Operation Erasing Stored Data To erase data stored in manual mode proceed as follows Data are erased in store name units It is not possible to selectively erase data for a specific address 1 Press the MENU key to bring up the menu list screen 2 Use the A V lt 1 gt keys to select Recall and press the ENT key 3 The file selection screen appears and stored data are displayed Use the A V keys to select the data that you want to erase 4 Press the CAL key A confirmation message appears To erase the data press the ENT key To cancel the process press the PAUSE key HSLS Select File WB Select File Store Name Date Store Name Date Internal Memory Internal
41. The procedure for using this function is described below l 2 Press the MENU key to bring up the menu list screen Use the A V lt gt keys to select Measurement and press the ENT key The measurement menu screen appears Use the A V keys to select Back Erase and press the ENT key The indication 5 s OFF appears Use the A V keys to make your selection from 5 s OFF and press the ENT key Press the MENU key to return to the menu list screen and press the START STOP key to return to the measurement screen If the additional processing function Laj s 18 selected the back erase function cannot be used The function also is not available during Autol store and during timer Auto2 store Select Back Erase Select 5 s Back Erase ON indicator BE on measurement screen appears SLM WS ON Ge 0 0MB 00 00 07 Manual 000001 BE a0 100120 eB Hess uremert Wind Screen Correction Measurement Time Back Erase D ete ne HAIN Lmax Lmin Type Trigger Mode y LAF Diffuse Field Correction 3 O O SUB Channel vi T dB LN Mode LCF 80 0 Return O gt MENU Measurement Screen O gt START L 01701 00 09 58 1 01 00 05 33 Measurement menu screen Measurement screen Measurement Marker During processing of Leq and other values it is possible to add markers to the data 1 Select the store mode on the main menu Also set the required measurement parameters such as frequency
42. ad Setting o gt Delete Setting O gt a Feun Measurement Screen O gt Return L 01701 00 00 13 L 01701 00 00 46 Use A V lt D keys to select the item and press the ENT key The System Settings Save screen appears WAHRE amp ten Settine HAHI amp ten 5etting Load Load Default List of Setting Group on CF No 1 2005 12 08 08 35 Group Date No 2 2005 12 09 09 55 No 2005 12 15 11 33 No 4 2005 12 25 17 06 No 5 2005 12 30 15 00 Group Save for CF y Group Loading Delete for CFIN Load Setting gt Save Setting O gt Delete Setting O gt Load Group Return Ce Delete Group O gt Measurement Screen O gt Return D Z 01 01 00 00 19 ZI 01701 00 00 21 Use A V lt D keys to select the item and press the ENT key The System Settings Load screen appears 48 Reading the Display Time setting Bring the cursor to Time Setting and press the ENT key The System Time Setting screen appears Wi Svctem Time Setting Year Month Day 2006 03 15 Use ENT key to select digit and 01 falsi use A V keys to change value Long push of A V key makes values change faster Press ENT key to accept setting Return C MENU Measurement Screen C gt START Z 01701 00 02 25 System Time Setting screen Program Information V Bring the cursor to Program Information and press the ENT key The System Settings Program Information screen appears WR Svoten Program
43. alyzer mode screen An example for the OCT amp 1 3 OCT analysis screen is shown below Use the lt and gt keys of the A V lt 1 gt keys to move to the target fre quency OCT amp ROCT ON a gt 0 0MB 00 00 00 Manual 0852 Dw Comparator indication Comparator band COMP P Main channel AP level Cursor Sub channel AP level Comparator level HAIN AP Fd o__ db Frequency and level o oct lene 4 43 8 dB 1 30ct __16 Hz 57 9 dB at cursor position hie eae aa tacos boot ab os 0101 00 00 26 Analyzer mode screen T L Time Level display screen An example for the 1 3 OCT analysis screen is shown below BOCT ON 00 00 00 Manual 4 1 3o0ct 1 kHz Level in band selected l with cursor 20 seconds before LCF AP 66 3 dB 1 30ct 1 kHz Current measurement parameters and level in main channel E a 7 ee eee eee eee eee M e M ee M M M M M M M M T L display screen 44 Reading the Display Numeric display screen Examples for OCT 1 3 OCT and OCT 1 3 OCT analysis screens are shown below KBOCT WS ON oe 0 0MB 00 00 00 Manual 000001 acT ESM o gt 0 0NB 00 00 00 Manual oooodi EE m A MAIN LAE 45 n 6 dB 16 16 dB abd Afa dB BS 206 dB dB dB dB dB dE dB LAF Loo 125 cue 4a 46 Ja 56 Bd T dB TB dB 02 0 01701 00 00 15 D O O O O O O O OO G O TANAN E F F nDamh saN oo r N a Ta TA a
44. an be car ried out as follows 1 Press the CAL key 2 Use the A V keys to adjust the unit to the indicated level maximum value 6 dB A calibration signal is supplied at the AC OUTPUT and DC OUTPUT jack on the bottom panel of the NA 28 3 Press the CAL key once more to return to the measurement screen General measurement law standard compliance ap plies to a sound level meter that has been electrically calibrated with an internal signal During a measurement of a quantity other than sound level including when a triangle symbol is flashing in the top left of the display and when the unit is in pause mode calibration cannot be performed Perform calibration after measurement is completed START STOP key has been pressed 34 Calibration Acoustic calibration with Sound Calibrator NC 74 For acoustic calibration a sound calibrator pistonphone is mounted to the microphone of the sound level meter and adjustment is performed so that the reading of the meter is equal to the sound pressure level inside the coupler 1 Turn off the Sound Calibrator NC 74 2 Turn on the NA 28 3 At the measurement screen use the FREQ WEIGHT key to set fre quency weighting for the main channel to A 4 Use the LEVEL A V keys to set the level range to 30 to 120 dB 5 Mount the 1 2 inch adapter on the coupler of the Sound Calibrator NC 74 Cs 1 2 inch adapter Umm to NC 74 4 aS 430 NO Sound Calibrator N
45. an the NC 94A External TRIG IN COMP OUT OUTPUT cover on bottom AC adapter NC 94A Open E iE To AC outlet 100 to 240 V AC 50 60 Hz 10 Preparations Windscreen WS 10 When making outdoor measurements in windy weather or when measuring air conditioning equipment or similar wind noise at the microphone can cause measurement errors Such effects can be reduced by using the wind screen WS 10 You can use a compensation feature to ensure flat frequency response when the windscreen WS 10 is mounted 1 Select Measurement from the menu list and press the ENT key 2 Select Wind Screen Correction from the menu and set it to ON 3 Press the MENU key to return to the measurement screen Windscreen WS 10 Mess urement Wind Screen Correction Set Wind Screen Measurement Time Correction to ON Back Erase Delay Time Lmax Lmin Type Trigger Mode y Diffuse Field Correction SUB Channel y LN Mode Return C MENU Measurement Screen O gt START ZI 01 01 00 03 58 Measurement menu screen 11 Preparations Diffuse Field Correction You can use a compensation feature to ensure flat frequency response in a diffuse sound field 1 Select Measurement from the menu list and press the ENT key 2 Select Diffuse Field Correction from the menu and set it to ON 3 Press the MENU key to return to the measurement screen Wee Measurement Wind Screen Correction ON Measurement T
46. ave bands Wee O Comparator Comparator Comparator Level Comparator Band Return C MENU Measurement Screen C gt START Z 01 01 00 12 11 Input Output Comparator menu screen OCT amp BOCT ON ee D 0MB 00 00 00 Manual 0852 setting band MEIRE LAF AF 59 5 dB oct 16 Hz 45 68 dB 1 So0ct 16 Hz 57 9 dB E LCF AF 60 7 dB oe 01 01 00 00 26 52 Reading the Display Store Use the A V lt gt keys to select Store and press the ENT key The store menu appears Store Mode Manual Autol Auto2 Store Name MAN x AUDI AU2 _ xxx is a 4 digit number from 0000 to 9999 Sampling Period SLM RTA only shown in Autol mode SLM 100 ms RTA 1 to 10 ms l ms steps 10 to 1000 10 ms steps Legis MENU MENU MENU Store Mode Manua Store Mode Autol Store Mode Store Name MAN_0011 Store Name AU1_0123 Store Name Samp ing Period SLM 100ms Return O gt MENU Return O gt MENU Return C MENU Measurement Screen C gt START Measurement Screen Ce START Measurement Screen Ce START Z 01701 00 10 39 Z 01 01 00 10 39 ZI 01 01 00 10 39 Manual store menu screen Autol store menu screen Auto2 store menu screen 53 Reading the Display Measurement Use the A V lt gt keys to select Measurement and press the ENT key The measurement menu appears Wind Screen Correction ON OFF Measurement Time Autol 1 sto 1000 h Auto2 normal measurement 1 s to 24 h Back Erase OFF 5
47. cator LED flashes blue gt green gt red PAUSE CONT START STOP STORE O amp Do poos 1 2 POWER O Indicator LED LEVEI OG Q je la A During initialization _ i the R in the Rion logo NA 28 rotates SOUND LEVEL METER 1 3 OCTAVE BAND ANALYZER IPL 0 4 0085 CPU 0 4 0085 Version 0 4 RION Co Ltd All rights reserved Made in Japan Power on screen 37 Power On Off To turn the unit off Hold down the POWER key until the unit is turned off several seconds When the power off screen appears release the POWER key After turning the unit off wait at least 10 seconds before turning it on again If the key lock has been activated pressing the POWER key has no effect Press the GRP NUM key and MENU key simultaneously to cancel the key lock condition and then press the POWER key The Rion logo separates into two parts and goes off Power off screen Power on mode Opening the battery compartment as shown below gives access to a switch labeled A B Setting this switch to the B position allows the NA 28 to be turned on simply by supplying power to the external power supply jack In this case the POWER switch on the operation panel of the NA 28 has no effect A B switch Battery compartment 38 Reading the Display sound level meter mode screen The illustration below shows all elements of the display for exp
48. channel All pass value only Sampling cycle I ms to 1 sec Leg 1s Internal memory max 10000 data 2 7 hours for I sec or Legis 129 Specifications Auto2 Data recall Recall processing Setup memory Print functions Inputs and outputs AC output 130 Sound level meter mode Continuous store of main pro cessing and additional processing values and measurement start time on CF card using preset measurement interval Analyzer mode Continuous store of main process ing all pass value and band level values and measurement start time on CF card using preset measurement interval Number of data Internal memory max 1 000 sets CF card max 300 000 sets Allows viewing of stored measurement data None Up to five setup configurations can be saved in internal memory for later recall Automatic loading of settings from setup file saved on CF card possible Printing of measurement results on dedicated USB printer Screen print mode Hard copy of current display screen Memory print mode Continuous printout of specified address range in memory Main channel or sub channel signal can be selected Output voltage 1 V rms at range full scale point Output impedance 600 Q Load impedance 10 kQ or more DC output Comparator output External trigger input USB Remote control sensor Power requirements Ambient conditions Dimensions Weight Specifications Main channel or sub channel signal can be sel
49. components as well The following pages contain important information about safety Be sure to read and observe these in full This manual contains the following sections Outline Gives basic information about the unit Controls and Functions Briefly identifies and explains the operation keys and connectors and all other parts of the unit Preparations Explains how to check the unit before use and how to install and set up the unit for measurement Calibration Explains how to calibrate the unit for measurement Power On Off Explains how to operate the power switch of the unit Reading the Display Explains symbols and other information shown on the display of the unit Measurement Explains the basic procedures for measurement Store Operation Explains how to store measurement data ili Memory Card Explains how to use a memory card with the unit Input Output Connectors Explains the input and output connectors of the unit Default Settings Lists the factory default settings of the unit Setup File Explains how to start up the unit using settings saved in a setup file Optional Accessories Explains how to use the optional microphone extension cable printer and level recorder with the unit Specifications Lists the technical specifications of the unit FOR SAFETY In this manual important safety instructions are specially marked as shown below To prevent the risk of death or in
50. coustic influence of the operator the microphone can be detached from the unit and connected via an extension cable Available cables are listed in the table below Cable runs of up to 35 meters are supported for standard compliance Combining multiple cables is also possible EC 04C 30 m reel 5 m connection cable EC 04 EC 04A EC 04D 50m reel 5 m connection cable EC 04B 10m EC 04E 100 m reel 5 m connection cable With long extension cables the cable capaci tance restricts the upper measurement frequency and measurement level For details refer to the Technical Notes 1 Loosen the preamplifier fastening screw and remove the preamplifier from the main unit Microphone Sound level meter main unit Microphone grid ee Preamplifier Fastening screw Never separate the microphone and preampli fier because this can lead to damage Before using the unit and before putting it away always check that the microphone grid has not become loose If this has happened refasten the microphone grid firmly and then use or store the unit Never remove the microphone grid because this can lead to damage 14 Preparations 2 Connect the extension cable to the preamplifier and to the main unit and fasten the connectors with the fastening screw 3 When mounting the microphone on a tripod first fasten the micro phone holder supplied with the extension cable to the tripod Then ins
51. d MENU key simultaneously activates the key lock condition and causes this symbol to appear To cancel the condi tion press the GRP NUM key and MENU key once more together Battery status When the unit is operated on battery power you should regularly check this indication The number of black segments will decrease as the batter ies get used up When the indication starts to flash replace the batteries with a fresh set Blue Blue Blue Red y m Cm Cm co It Batteries good mmm Batteries getting low Indication flashes Replace batteries When the unit is being powered from an AC adapter power plug symbol is shown Remote control ON This indication 1s shown when remote control of the unit has been en abled USB link status When the unit has been connected as a removable disk this symbol is shown in blue When USB communication has been enabled symbol is shown in green Sub channel time weighting Indicates the sub channel time weighting characteristic F Fast S Slow t 10 ms I Impulse The sub channel time weighting characteristic is set from a menu Sub channel frequency weighting Indicates the sub channel frequency weighting characteristic A A weighting C C weighting Z Flat response The sub channel frequency weighting characteristic is set from a menu 41 Reading the Display 42 Main channel time weighting Indicates the main channel time weighting characteristic F Fast S Slow t
52. e the level range setting Analyzer mode SLM ON gt 0 00MB 00 000 Manual 00000 Back erase ON Elapsed time Measurement in progress symbol OVERS l OVER 60 MATH rr Overload indication Main channel UNDER ioe 4 ee Frequency weighting 8 O 0O Under range indication Time weighting dE SUB Sub channel ic Frequency weighting it Time et 80 a O db mi 01701 00 05 33 Measurement 5 The level indication shows the currently measured sound level sound pressure level The reading is updated once every second The PAUSE CONT key can be used to stop and resume the updat ing of level indication In sound level meter mode the bar graph indication will be updated also during pause In the pause condition a pause symbol II appears on the display and the indicator LED flashes blue During sound level measurement do not press the MODE key Otherwise other processing results will be shown The sound level is being displayed when there is no character string after the basic indication LF Sound level is being displayed LAeq Sound level is not being displayed If you press FREQ WEIGHT key TIME WEIGHT key or LEVEL A V keys during measurement the indication Marker appears and the keypress has no effect Equivalent Continuous Sound Level Laeq Measurement The procedure for equivalent continuous sound level measurement is de scribed below Preparations as desc
53. e chapter Preparations page 9 should be completed For details about printer operation refer to the documentation supplied with the respective product Printing a measurement screen The steps for producing hard copy of a measurement screen are described below l 2 116 While the measurement screen is displayed press the MENU key Use the A Y lt 1 P keys to select Print from the menu list screen When you press the ENT key the following display appears To print the screen press the ENT key once more To cancel the process press the PAUSE key Select Print and press ENT key SMB en List O oO SLM WS ON DA 0 HE idm 000 07 Manua 0333 BE 100 120 System Display E D E a rement Do you execute print Yese gt ENT No gt PAUSE Recal Return C MENU Measurement Screen O gt START SO 0 O1 01 00 03 19 03 03 12 34 55 Menu list screen Printing screen Optional Accessories Printing stored data The steps for printing stored data are described below 1 On the menu list screen select Recall and press the ENT key 2 Use the A V lt gt keys to select the stored data that you want to print 3 When you press the ENT key the stored data are displayed Select Recall and press ENT key MENU U Select File Store Name Date System Display 1 0 Internal Memory MANUAL 2006 01 25 09 30 MANUAL 2006 02 25 15 55 MANUAL 2006 03 03 22 10 Measu Store
54. e cycle is shown Store mode Shows the selected mode for storing data in memory Manual Autol or Auto2 Level range Shows the upper and lower limit of the bar graph Can be switched with the LEVEL 4 V keys Bar graph Shows the sound level as a bar graph indication The display is updated every 100 ms Overload indication When a signal overload condition is detected the indication white on black is shown for at least 1 second If this indication appears frequently use the LEVEL 4 V keys to increase the level range setting If processed data contain signal overload data the indication 1S shown This indication remains on the display until the next processing measurement is started Under range indication When a signal under range condition is detected the indication white on black 1s shown If this indication appears frequently use the LEVEL 4 V keys to decrease the level range setting If processed data contain signal under range data the indication 1S shown This indication remains on the display until the next processing measurement is started Main channel level display Shows the measured sound level in the main channel The display is updated every second Sub channel level display Shows the measured sound level in the sub channel The display is up dated every second 40 Reading the Display Current date and time Shows the current date and time Key lock Pressing the GRP NUM key an
55. e flashes If the logical structure of the CF card has been dam aged such as when the power failed or was turned off during a store process you must format the card in a computer When formatting initializing a CF card in a com 102 puter select FAT as the file system Input Output Connectors AC OUTPUT 1 Press the MENU key to bring up the menu list screen 2 Use the A V lt 1 gt keys to select I O Input Output and press the ENT key 3 Use the A V lt 1 gt keys to select AC OUT and press the ENT key 4 Use the A VY lt l gt keys to select MAIN SUB and press the ENT key It is a frequency weighted AC signal derived from the main channel signal when you select MAIN or a frequency weighted AC signal derived from the sub channel signal when you select SUB Output voltage 1 Vrms 50 mVrms at scale upper limit Output impedance Approx 600 Q Load impedance 10 kQ or more Suitable cable Output cable CC 24 BNC RCA cable DC 5 6V OCO AC O COMP OUT 0 C Bottom view AC OUTPUT DC OUTPUT Using this feature will reduce battery life by about 30 percent 103 Input Output Connectors The relationship between the display value shown by the NA 28 and the output voltage is indicated below When the NA 28 is set to the calibration mode the output signal level range upper limit 120 dB 6 dB 1000 Hz is 0 5 Vrms 10
56. e measurement When the measurement is completed use the MODE key to switch the display to show the various processing results If the indication OVER is shown the processed data include data where the sound level signal caused an overload condition If the indication UNDER is shown the processed data include data where the sound level signal caused an under range condition Measurement La is the time weighted sound level Processing for this value begins when the START STOP key is pressed and the display is updated ac cordingly The display will not be updated when processing has stopped Therefore using the MANUAL mode is recommended for La During measurement you can use the MODE key to check the equivalent continuous sound level as currently calculated This applies only to the nu meric level display The bar graph shows the sound level After the measurement is completed changing the frequency weighting A C Z time weighting F S or other settings has no effect on the displayed pro cessing results T5 Measurement 76 Back Erase Function When a measurement is being carried out and data are being processed the PAUSE CONT key can be used to pause the measurement Normally data up to the point at which the PAUSE CONT key was pressed will be included in processing but the back erase function makes it possible to exclude back erase data from a 5 second interval before the key was pressed
57. e more to return the NA 28 to the measure ment mode 8 Use the FREQ WEIGHT key to set the frequency weighting character istic The time weighting characteristic is set at the level recorder 9 Use the LEVEL A V keys to adjust the level range Make the set ting so that the OVER or UNDER indication does not appear The level range scale upper limit setting of the NA 28 becomes the scale upper limit of the level recorder SLM WS ON gt 0 0NB OO 00 0 7 Manual 9872 20 40 60 80 100 120 Sound level meter scale upper limit MAIN AF 100 0 LCF 120dB 110dB 100dB 90dB 80 dB 70dB 100 0 ADANADA DADAA ADADDA ANADA DEDAN MANANNAN E UN ODADADADAN DDADANDAN URANO AUTO UN HORTON VENTAAET VAAN VENT AUTO UN ODADADANDN DDADANDAN ODADDTDEDI HEAT UN ODADADANDA DEDADANDAN ODADDDDEDI HEAT When recording range is 50 dB Measurement screen OoOddada oO Optional Accessories Program Cards The NA 28 can make use of a range of optional program cards For details on usage refer to the documentation supplied with the respective card 121 Optional Accessories Remote control The remote control NA 27RC1 can be used to control the basic functions and measurement parameters of the sound level meter This is achieved by pressing buttons arranged on the panel of the remote control The operation range of the remote control is 3 meters Infrared transmitter window PAUSE UP DOWN CONT LLEveL4 RION
58. e the product no longer conforms to specifications Display The display of the unit is a backlit LCD panel It shows the measured sound level as a numeric indication and as a bar graph It also indicates the opera tion status of the unit and shows measurement parameters as well as warning indications and other information Controls and Functions Operation key panel START STOP key STORE key MODE key 7a ns oo Key lock D AD PAUSE CONT key GRP NUM key Me Al Indicator LED VOAN TO ODA LEVEL A V keys SLM RTA key 40 KIO agal A V lt Pkeys CAL key ENT key GOET A a O lo LIGHT key K wera Te y POWER key FREQ WEIGHT TIME WEIGHT keys START STOP key Press to start or stop the measurement including the various processing functions STORE key Serves to start the auto store process or to perform manual store for en tering data into the memory MODE key Switches the processing mode Each push of this key cycles through the results of the respective process ing functions selected on the menu screens PAUSE CONT key During a measurement this key can be used to exclude unwanted portions from processing Press the key to pause measurement and press the key again to resume measurement The back erase function makes it possible to exclude data from an interval of 5 seconds before the key was pressed from processing During pause the indicator LED flashes in blue
59. easurement parameters sub channel etc as required using the MENU key to select setting items 10 Press the START STOP key to return to the measurement screen 11 Press the STORE key to start the measurement MENU MENU Wind Screen Correction Trigger Mode Time Measurement Time Trigger Start Time 02 15 10 55 Back Erase Trigger Stop Time 02 16 12 00 Delay Time Interval Time 30m Lmax Lmin Type Sleep Mode OFF Trigger Mode y Diffuse Field Correction SUB Channel y LN Mode Return gt MENU Return gt MENU Measurement Screen O gt START Measurement Screen C gt START ZI 01 01 00 09 58 Z 01701 00 11 37 Measurement menu screen Time trigger menu screen Measurement end time Measurement start time trigger start time miererend time Measurement time Measurement interval Trigger interval Measurement time Measurement interval Recalling Stored Data Same procedure as for Autol see page 94 Erasing Stored Data Same procedure as for Autol see page 96 98 Memory Card Using a memory card Open the cover of the memory card slot and insert a CF card To remove the card push the lever so that the card pops out Make sure that power is OFF before inserting or removing a card men CO ESS 1 Slide in arrow direction 2 Lift Front side N Lever CF card push to remove card Card slot 99 Memory Card About memory cards Be sure to use memor
60. ected Output voltage 3 0 V 25 mV dB at range full scale point Output impedance 50 Q Load impedance 10 kQ or more Open collector output Band level determination also possible Connector is shared with external trigger input func tion selected via menu Maximum applied voltage 24 V DC Maximum drive current 50 mA DC Detection of 0 to 5 V logic level signal falling edge trigger Connector is shared with comparator output function selected via menu Allows connection to a computer as storage device or use aS communication device for unit control via communication commands Allows operation of NA 28 using infrared remote control optional Four IEC R14 size C batteries or external DC power supply 5 to 7 V Battery life at 23 C normal operation Manganese batteries RI4PU 6 hours Alkaline batteries LR14 16 hours 10 hours with constant backlight AC adapter NC 94A 100 to 240 V 50 60 Hz Rated voltage 6 V Current consumption 230 mA normal op eration 10 to 50 C 10 to 90 RH 331 x 89 x 51 mm Approx 730 g with batteries 131 Specifications Supplied accessories CF card 128 MB 1 Storage case l Soft case 1 AC adapter NC 94A 1 Windscreen WS 10 1 BNC RCA cable CC 24 1 Hand strap l Size C battery LR14 4 Instruction manuals Instruction Manual Serial Interface Manual Technical Notes 1 each set Inspection Certificate l 132 Specifications Optional accessories Sound Calibrator N
61. ed Relationship between elapsed measurement time and number of data When using Autol store and 100 ms sampling 10 data sets are stored per second Therefore when 10 seconds of measurement time have elapsed the number of stored data is 100 10 when using I sec ond sampling During Autol store the back erase data exclusion function cannot be used During Autol store the address indication is based on elapsed mea surement time 93 Store Operation 94 Recalling Stored Data The procedure for recalling data stored in memory is described below l 2 Turn power to the unit on Press the MENU key to bring up the menu list screen Use the A V lt 1 gt keys to select Recall and press the ENT key The file selection menu appears Use the A V keys to select the store name whose data you want to recall and press the ENT key The GRP NUM key can be used to switch between numeric display and graph display MiB Select File Store Name Date Internal Memory MANUAL 2006 02 26 15 22 MANUAL 2006 02 27 15 42 CF card AU1_1234 2006 02 28 16 15 AU1 2222 2006 02 29 18 06 Select store name with A V keys and press ENT key Copy to CF Card STORE Delete Data 5 gt Return C MENU Measurement Screen C gt START ZI 01 01 00 00 28 Store Operation MODE key PAUSE CONT START STOP STORE MENU key 169 Go G LEVEL SLM RTA key O as A V lt D keys ENT ke
62. ed in the Preparations chapter must be completed first l ID ws 8 For information about how to store data refer to the section starting on page 81 Press the MENU key to bring up the menu list screen Use the A V lt gt keys to select Display and press the ENT key The display menu screen appears Use the A V keys to select Z and press the ENT key Use the A V keys to select ON and press the ENT key Use the A V keys to select Z and press the ENT key Use the A V keys to select ON and press the ENT key To measure Lmax only verify that Lmin 18 set to OFF and skip steps 6 and 7 To measure Lmin only verify that Lmax 18 set to OFF and skip steps 4 and 5 Press the MENU key to return to the measurement screen 9 Press the START STOP key to start the measurement Displa MAX Hold MAX Hold OFF Leq LE Lmin LN1 LN2 to ON LN3 LN4 LN5 List List Time Level Return O gt MENU Measurement Screen O gt START 01 01 00 10 29 Time Leve Return O gt MENU Measurement Screen O gt START a 01 01 00 10 29 Display menu screen 10 Measurement While the measurement is in progress the symbol flashes and the elapsed time is displayed When the measurement time has elapsed the measurement is terminated automatically To terminate the measurement before the allocated time press the START STOP key If signal overload or an under range condition occu
63. efore starting the measurement During measurement the PAUSE CONT key can be used to pause and resume the measurement During pause the pause symbol II is shown The paused interval and the back erase interval are not included in the measurement time When the measurement is completed use the MODE key to switch the display to show the various processing results Lag means that the sound exposure level is displayed If Lag is not shown check whether Lag is set to ON on the menu screen If the indication OVER is shown the processed data include data where the sound level signal caused an overload condition If the indication UNDER is shown the processed data include data where the sound level signal caused an under range condition During measurement you can use the MODE key to check the equivalent continuous sound level as currently calculated This applies only to the nu meric level display The bar graph shows the sound level After the measurement 1s completed changing the frequency weighting A C Z time weighting Fast Slow or other settings has no effect on the displayed processing results 67 Measurement 68 Maximum Sound Level Lmax and Minimum Sound Level Lmin Measurement The procedure for maximum sound level and minimum sound level measure ment is similar to that for equivalent continuous sound level measurement but the menu item selection differs Preparations as describ
64. el After the measurement is completed changing the frequency weighting A C Z time weighting F S or other settings has no effect on the displayed pro cessing results Measurement Additional Processing Value Lpeax Latms Measurement When the NA 28 is in sound level meter mode and the sub channel is ON the following processing functions are available in addition to Lea Lg Lax Lmin and Ly Leak Peak sound level eq Lims Time weighted takt max sound level The peak sound pressure level is based on the sound pressure waveform peak level before being smoothed by time weighting Lpeax 18 the peak level with flat characteristics and Lcpeax the peak level with C weighting The time weighted takt max sound level LAtm5s is the power average of the maximum level for each 5 second interval Preparations as described in the Preparations chapter must be completed first 1 Turn power to the unit on Use the FREQ WEIGHT key to select the frequency weighting characteristic 2 Set the measurement time from the menu Press the MENU key to bring up the main menu screen 3 Use the A V lt E keys to select Measurement and press the ENT key The measurement menu screen appears 4 Use the A V keys to select Measurement Time and press the ENT key or the gt key 5 Use the A V keys to set the measurement time and the unit and press the ENT key For information about how to use the back erase function to
65. ep clock setting on the unit and to store measuring data in internal memory Those data and clock set ting will be gone if the unit is not used for a certain period or the backup battery is empty The backup battery is automatically charged by the main batteries while the unit is operating Full charge of the backup battery requires approximate 24 hours For instance the internal memory and clock set ting is kept for 5 days when the backup battery is charged for 5 hours If the unit is not to be used for an extended period the main batteries should be taken out to prevent possible damage due to battery fluid leakage After reinserting the batteries be sure to set the date and time Preparations Measurement tn a dark location Pressing the LIGHT key will turn on the display backlight for easier read ing in a dark location The backlight operation pattern can be controlled via a menu as follows 1 Press the MENU key to bring up the menu list screen 2 Use the A V lt 1 D gt keys to select I O and press the ENT key 3 Use the A V keys to select Backlight Brightness and press the ENT key 4 Use the A V keys to select Bright or Dark and press the ENT key 5 Use the A V keys to select Backlight Auto Off and press the ENT key 6 Use the A V keys to select the automatic turn off interval and press the ENT key START STOP STORE A Bo Q AVA _ A V lt D keys Q i ENT key 1 POWER LIGHT key
66. erstsac assecetecatincs onsetaentensemaceneiat 106 Delal SONE S esed eena Aa E EERE 108 DCE Ue A E A EAE E E A EAE 110 Preparing a setup file for automatic loading 111 Saving a setup IC vensesvantouiateteusbinbivirstiadeneeseiedoenesenerinimensweandede 113 Copying aset p file t CF Cai Oa crccimateancvasanarsanctonstanmawenepaientant 114 OpHonal ACCC SSO ISS e E E E 115 Microphone Extension Cables EC 04 series c 000ee 115 PTT E 116 Level Recorder LR OV LR 20A oi cnsvcsecetsaveseneessacnaevaseididsdeancnes 119 PCO At E E E E E 121 ISCO LS COCO e a E E E E 122 PS CHIC AOI aa ara nctese A E 124 XV xvi The Sound Level Meter NA 28 allows octave and 1 3 octave band analysis in real time It conforms to legal requirements for quantity measurements and to JIS and IEC standards It supports diffuse sound field measurements and also meets standard requirements when the supplied windscreen is mounted The NA 28 consists of the 1 2 inch electret condenser microphone UC 59 preamplifier NH 23 and the main unit The main unit is equipped with an LCD panel operation keys AC and DC output connector USB port com parator output external trigger input and infrared remote control sensor The unit supports real time octave band analysis in the range from 16 Hz to 16 kHz and real time 1 3 octave band analysis in the range from 12 5 Hz to 20 kHz It is also possible to perform octave and 1 3 octave band analysis simu
67. ert the extension cable connector into the microphone holder Preamplifier Microphone i Microphone holder 15 Preparations Connection to a Printer The USB port on the bottom of the unit can be used for connection to a USB printer using the printer connection cable USB port Open f cover on bottom To printer Printer connection cable Connection to a Level Recorder LR 07 LR 20A Sound level recording Connect the AC OUTPUT jack on the bottom to a level recorder as shown below AC DC OOO N USB COMP OUTAAOUTPUT Connect l to AC OUTPUT Open cover on bottom Output cable CC 24 To input connector on level recorder LR 07 LR 20A 16 Preparations Connection to a Computer The USB port on the bottom of the unit can be used for connection to the RS 232C interface or USB port of a computer using the optional serial I O cable or USB connection cable DC 5 6V CO AC O TRIG IN COMP OUT OUTPUT Open cover on bottom C J USB port To computer 17 Preparations Setting the Date and Time The NA 28 incorporates a clock which allows recording the date and time along with measurement data Set the date and time as described below 1 Press the POWER key to turn the unit on 2 Press the MENU key The menu list screen appears on the display 3 Use the A V lt 1 gt keys to select System and press the ENT key 4 Use the A V lt 1
68. ess the MENU key to return to the previous screen Press the START STOP key to return to the measurement screen KELI O Comparator Select comparator i lea leek Display ON OFF by pressing ENT or gt key Comparator Band USB Communication Use A V keys to select ON Remote Control Press ENT key Backlight Brightness Set Backlight Auto 0f f Beep Index Comparator level Comparator band in the same way Return amp gt MENU Return amp gt MENU Measurement Screen O gt START Measurement Screen O gt START 01 01 00 11 06 E 01 01 00 12 11 V O Input Output menu screen I O Input Output Comparator screen 30 Preparations About the comparator output When the sub channel is OFF the comparator will not function if sub chan nel is selected as comparator band Similarly if analyzer mode is set for simultaneous analysis of octave and 1 3 octave bands and 16 kHz or 20 kHz is selected as comparator band the comparator will not function The comparator signal output timing pattern is as shown below Comparator signal output continues for 1 second after signal crosses level threshold ls Comparator level Time Preparations Language Selection 32 The language used for displaying messages and menus can be selected as follows l L Press the MENU key to bring up the menu list screen Use the A V lt gt keys to select System Language and press the ENT key T
69. exclude data refer to page 76 The NA 28 has a pause function and a back erase function that allows excluding data for the immedi ately preceding 5 seconds from the measurement However the back erase function cannot be used when LAtmS is selected Measurement 74 10 Select Lyeak Lims Press the START STOP key to return to the measurement screen Use the LEVEL 4 V keys to set the level range Choose a setting in which the bar graph indication registers to about the middle of the range If the OVER or UNDER indicators appear frequently change the level range setting Press the START STOP key to start the measurement While the measurement is in progress the symbol flashes and the elapsed time is displayed When the measurement time has elapsed the measurement is terminated automatically To terminate the measurement before the allocated time press the START STOP key The START STOP key is also used to stop the measurement when MANUAL has been selected If signal overload or an under range condition occurs at least once during measurement the indication OVER or UNDER appears to indicate that overload or under range data are comprised in the processed values During measurement the LEVEL 4 VY keys FREQ WEIGHT key and TIME WEIGHT key function as markers The START STOP key MODE key PAUSE CONT key LIGHT key and POWER key are operative Be sure to complete all settings before starting th
70. g Delete for CF card List of setting groups on CF card Year Month Day Hour Min Sec Model Version Comparator ON OFF Comparator Level Comparator Band OFF Level 1 Level 2 Time EXT Sub channel measurement ON OFF frequency weighting time weighting Lpeak Ltm5 Items displayed when proceeding to next menu level SLM mode 100 ms RTA mode 1 to 10 ms 1 ms steps 10 to 1000 10 ms steps L eq s Measurement When using the NA 28 in a mode other than sound level measurement all processing functions provided by the unit Lea Le Lmax Lmin Ly are car eq ried out simultaneously However for the sub channel only the additional processing function set to ON in the menu screen is carried out For ex ample when equivalent continuous sound level measurement is selected the sound exposure level and percentile level are also determined However the time percentage setting for the percentile level 5 values must be selected beforehand Also make sure that the date and time are set correctly as de scribed on page 18 to 19 Sound Level Measurement The procedure for sound level measurement is described below Preparations as described in the Preparations chapter must be completed first Sound level sound pressure level 1 Press the POWER key to turn the unit on After the power on screen has been shown the measurement screen appears The measurement parameter settings depend on the conditi
71. gger Setting l Se E Press the MENU key to bring up the menu list screen Use the A V lt 1 P keys to select Measurement and press the ENT key Use the A V keys to select Trigger Mode and press the ENT key Use the gt key to display the trigger mode Use the A V keys to select EXT and press the ENT key The unit returns to the screen that was active before the MENU key was pressed Press the START STOP key to return to the measure ment screen MENU Trigger Mode Return Ce MEHL Measurement Screen O gt START Trigger menu screen 29 Preparations Comparator Output This is an open collector output that can be used to control external equip ment ie 2 AC OUT DC OUT Ea Press the MENU key to bring up the menu list screen Use the A VY lt 1 P gt keys to select I O Uinput Output and press the ENT key The input output menu is shown Use the A V keys to select Com parator and press the ENT key The I O Comparator menu appears 4 1 Use the A V lt 1 D gt keys to select Comparator and press the gt key to display the ON OFF setting Use the A V keys to select ON and press the ENT key 4 2 In the same way select Comparator Level set the level and press the ENT key Setting range 25 to 130 dB 1 dB steps 4 3 Inthe same way select Comparator Band set the band and press the ENT key SUB AP MAIN AP 12 5 Hz 16 Hz 20 Hz 25 Hz 20 kHz 1 3 octave bands Pr
72. he system menu screen appears Use the A V keys to select Lan guage press the ENT key and use the A V keys to select the lan guage Press the ENT key to accept the setting Press the START STOP key to return to the measurement screen The language selection is memorized by the unit and will be active also the next time the unit is turned on MENU CF Card Format Read Save Setting y Time setting y Program Information W CF size JARN lt Select language and press ENT key Deutsch Pan Use MENU key French to return to measurement screen Return O gt MENU Measurement Screen O gt START 01 01 00 11 06 System menu screen Calibration Before starting a measurement the NA 28 must be calibrated There are two types of calibration namely electrical calibration using an internally gener ated signal and acoustic calibration using an external sound calibrator Electrical calibration Calibration is carried out using a signal generator 1 kHz sine wave built into the unit 1 Press the POWER key to turn the unit on 2 Use the LEVEL 4 V keys to set the level range to 20 to 120 dB 3 Press the CAL key A display such as shown below appears If the level range setting is not 20 to 120 dB a value of level range upper limit 6 dB will be flashing instead of the 114 dB indication on the display If Acoustic Calibration is shown under the bar graph press the STORE key The indication will change to
73. he unit are as follows temperature range 10 to 50 C relative humidity 10 to 90 RH Protect the unit from water dust extreme temperatures humidity and direct sunlight during storage and use Also keep the unit away from air with high salt or sulphur content gases and stored chemicals Always turn the unit off after use Remove the batteries from the unit if it is not to be used for a long time a week or more When disconnecting cables always grasp the plug and do not pull the cable Before using the unit and before putting it away always check that the microphone grid has not become loose If this has happened refasten the microphone grid firmly and then use or store the unit Clean the unit only by wiping it with a soft dry cloth or when neces sary with a cloth lightly moistened with water Do not use any solvents cleaning alcohol or chemical cleaning agents Do not try to disassemble or alter the unit Otherwise type certification will become invalid In case of an apparent malfunction do not attempt any repairs Note the condition of the unit clearly and contact the sup plier Do not tap the LCD panel or other surfaces of the unit with a pointed object such as a pencil screwdriver etc Take care that no conductive objects such as wire metal scraps conduc tive plastics etc can get into the unit xi To ensure continued accuracy have the unit checked and serviced at regular intervals When
74. ic light out function was selected from the menu the backlight will turn itself off automatically after the preset time Controls and Functions CAL key Calibration key This key is used for calibration of the unit and for level calibration of connected equipment SLM RTA key Sound level meter Real time analyzer key This key switches between sound level meter mode and real time analyzer mode MENU key This key serves to bring up a menu screen for setting measurement pa rameters and making other settings Pressing the key again closes the menu GRP NUM key Graph Numeric key This key switches the measurement screen between graphical and numeric display Key lock Pressing the GRP NUM and MENU keys together activates the key lock A red lock symbol appears in the bottom left corner of the display and the operation keys except for the LIGHT key are disabled Pressing the GRP NUM and MENU keys together once more cancels the key lock To turn the unit off you must first cancel the key lock and then hold down the POWER key Memory card slot cover Open this cover to insert or remove the CF card Infrared remote control sensor Using an optional infrared remote control allows operation of the unit from a distance Controls and Functions Bottom View i lal 2 O E RIG IN Cover COMP our OUTPUT ca om _ Bottom External power supply jack USB port TRIG IN COMP OUT jack
75. ient Data excluded by the back erase function are indicated on the display as follows BOCT WS ON o gt 0 OMB OO 00 00 Manual 0234 Data excluded by back erase function 30 dE MINEA LCF AP 66 3 dB 1 30ct 1 kHz 52 8 dB OO 01 01 00 01 43 Time Level screen 15 When the measurement is completed use the MODE key to switch the display to show the various processing results Leg Means that the equivalent continuous sound level is displayed If Leg 18 not shown check whether Leq 1s set to ON on the menu screen If the indication OVER is shown the processed data include data where the sound level signal caused an overload condition If the indication UNDER is shown the processed data include data where the sound level signal caused an under range condition During measurement you can use the MODE key to check the equivalent continuous sound level as cur rently calculated This applies only to the numeric level display The bar graph shows the sound level After the measurement is completed changing the frequency weighting A C Z time weighting Fast Slow or other settings has no effect on the displayed processing results Measurement Sound Exposure Level Lae Measurement The procedure for sound exposure level measurement is similar to that for equiva lent continuous sound level measurement but the menu item selection differs Preparations as described in the Preparations chapter must be completed f
76. ime 10 m Back Erase OFF Delay Time Os Lmax Lmin Type Band Trigger Mode OFF Diffuse Field Correction IM SUB Channel fy Set Diffuse Field Correction LN Mode Lp to ON Return 5 gt MENU Measurement Screen O gt START ml 01 01 00 09 58 Measurement menu screen Tripod Mounting For long term measurements the unit can be mounted on a camera tripod Proceed carefully to avoid dropping the unit or tipping over the tripod Tripod mounting thread 12 Preparations Memory Cards CF Card and Program Cards Measurement data can be stored on a memory card for use and further pro cessing in a computer Optional program cards can also be used for loading software into the NA 28 to expand the measurement functions of the unit Inserting a card Make sure that power is OFF before inserting or removing a card 1 Open the memory card slot cover 2 Insert the card Take care to not to try inserting the card with wrong orientation Push the card in carefully until it is properly seated 3 To remove the card push the black lever The card will pop out and can be removed Engage this section 1 Slide 2 Lift Front side Lever CF Card push to remove card Card slot 13 Preparations Microphone Extension Cables EC 04 series Be sure to turn power to the unit OFF before separating the microphone from the main unit To reduce measurement deviations due to refraction effects and the a
77. ing settings from a setup file at startup has the following advantages Setup file stored on CF card is loaded automatically and establishes the desired settings allowing quick measurement start If settings were changed by mistake simply turning the unit off and on again will restore the original settings Storing different setup files on a number of CF cards allows chang ing settings simply by changing the CF card This facilitates accurate parameter control for various measurements In order to automatically load settings from a file at startup a special folder NA 28 SETUP STARTUP must be created on the CF card and a setup file NA 28SETO rns where is a number from 1 to 9 must be created in that folder If several setup files exist in this folder the one with the lowest number will be used When the NA 28 is turned on with a CF card inserted and if that CF card contains a setup file a dialog asking whether to load the settings appears Either selecting Yes at this dialog or waiting for 10 seconds will cause the settings 1n the file to be loaded Setup file loading precaution The NA 28 has a resume function that will cause the same settings as used at the last time to be re established when the unit is turned on again If a setup file is loaded and the settings from that file are established the settings memorized by the resume function will be overwritten It is therefore recom mended to save the current setti
78. irst 1 For information about how to store data refer to the section starting on page 81 2 Press the MENU key to bring up the menu list screen 3 Use the A V lt gt keys to select Display and press the ENT key The display menu screen appears 4 Use the A V keys to select LE and press the ENT key 5 Use the A V keys to select ON and press the ENT key HERIR Displa MAX Hold OFF Leq ON ca lt Set LE to ON Lmax Lmin ON LN1 LO5 ON LN2 L10 ON LN3 L50 ON LN4 L90 ON LN5 L95 oN List ON Time Leve ON Measurement Screen O gt ma 01 01 00 10 29 Display menu screen 6 Press the START STOP key to return to the measurement screen 7 Press the START STOP key to start the measurement While the measurement is in progress the gt symbol flashes and the elapsed time is displayed When the measurement time has elapsed the measurement is terminated automatically To terminate the measurement before the allocated time press the START STOP key If signal overload or an under range condition occurs at least once during measurement the indication OVER or UNDER appears to indicate that overload or under range data are comprised in the processed values 66 Measurement During measurement the LEVEL A V keys FREQ WEIGHT key and TIME WEIGHT key function as markers The START STOP key MODE key PAUSE CONT key LIGHT key and POWER key are operative Be sure to complete all settings b
79. jury to persons and severe damage to the unit or peripheral equipment make sure that all instructions are fully understood and observed A Caution Disregarding instructions printed here incurs the risk of injury to persons and or dam age to peripheral equipment Disregarding instructions printed here incurs the risk of damage to the product Mentioned about the tips to use this unit properly This messages do not have to do with safety yi Quantifier notation Sound level and sound pressure level are expressed uniformly as sound pres sure level distinguished by the use of frequency weighting Display on NA 28 Ly Sound pressure level Leg Equivalent continuous sound level Ly Sound exposure level L max L min Maximum sound level Ly Percentile sound level Lpgak Peak sound level L tm5 Takt max sound level Ssec the time weighting characteristics F S 10 ms Measurement value A weighted sound pressure level C weighted sound pressure level Z weighted sound pressure level Equivalent continuous A weighted sound level Equivalent continuous C weighted sound level Equivalent continuous Z weighted sound level Lap Las Laioms Lcr Lzy Lop Les Lcioms LR L7s L710ms Li neg Lateq L Ceq Lcteq LZIeq Late Lc Lze L AImax LcImax LZ Imax LANn Lemn L71Nn L7eq LAE Leeg LZR Liners Lasmax gt La tOmsmax Lopmaw L
80. keys to select Sampling Period and press the ENT key Use the A V keys to set the sampling period and press the ENT key In sound level meter mode the setting is fixed to 100 ms MENU MENU MENU See Manual Store Mode E Store Mode Manual Autol Store Name AU1_ W00 Store Name A 00 oo Sampl ing Per iod RTA hs Sampling Per iod RTA Oms Sampl ing Period RTA Return O gt MENU Return O gt MENU Return O gt MENU Measurement Screen O gt START Measurement Screen O gt START Measurement Screen O gt START my 01 01 00 10 39 my 01 01 00 10 39 my 01 01 00 10 39 7 Set other measurement parameters measurement time trigger mode sub channel etc as required using the MENU key to select setting items 8 Press the START STOP key to return to the measurement screen 92 Store Operation 9 Press the STORE key to start the measurement During measurement only the START STOP key MODE key LIGHT key STORE key FREQ WEIGHT key TIME WEIGHT key LEVEL key and POWER key are operative Be sure to complete all settings before starting the store process During normal Autol store storing of measurement data will stop when the end of the measurement time is reached To stop the process earlier press the START STOP key or the STORE key When time trigger is being used storing of measurement data will stop when the end of the measurement time or the preset measure ment end time is reach
81. l F S 10 ms I Linear operating range All pass A weighting 115 dB Spectrum 95 dB Level range Sound level meter mode Display range max 100 dB 30 to 130 dB 20 to 120 dB 20 to 110 dB 20 to 100 dB 20 to 90 dB 20 to 80 dB Analyzer mode Display range 90 dB 40 to 130 dB 30 to 120 dB 20 to 110 dB 10 to 100 dB O to 90 dB 10 to 80 dB Sampling cycle Leg Le Lmax Lmin LCpeak peak Lateg 15 6 US with simultaneous octave and 1 3 octave analysis 20 8 us Ly 100 ms Correction functions Windscreen correction Frequency response correction to ensure standard compliance with windscreen installed Correction on off setting via menu 127 Specifications Diffuse sound field correction Display Update frequency Trigger function Level 1 Level 2 External Time Delay function Setting range Back erase function Store 128 Frequency response correction to ensure standard compliance in diffuse sound field Correction on off setting via menu Backlit semitransparent TFT LCD display 240 x 320 dots 100 ms Controls measurement and memory store start Trigger level 1 dB steps serves as threshold for starting measurement measurement ends after preset time Slope can be set Single measurement is carried out when trigger level is exceeded External trigger connector for logic level signal with falling edge detection Start time and trigger event recurrence interval are set Sets a delay interval bet
82. lanation pur poses In actual operation such a screen will not be shown and the size and font of the actual display may be slightly different Diffuse sound correction Comparator ON Comparator level Trigger mode CF card insertion indicator Windscreen correction CF card remaining capacity Analyzer mode Measurement time settin 0 OMB S aruer 000001 je Address Back erase ON A Elapsed time Level range Measurement in progress symbol nmo Bar graph MAIN Overload indication Main channel L A F Frequency weighting S Under range indication Time weighting j 3 0 O 5 Main channel level display amp Sub channel Frequency weighting ic F Time weighting SUES l t USB link status 3 O O dE Remote control ON oe ee Battery status mie T Current date and time Key lock C Comparator ON Comparator level When the comparator function has been set to ON the comparator level is shown as an orange line on the bar graph When a signal exceeds that level the indication Comp appears and a signal is output from the COMP OUT jack on the bottom panel open collector CF card insertion indicator Shown when a CF card is inserted in the unit CF card remaining capacity Shows the remaining capacity of an inserted CF card 39 Reading the Display Address Shows the current memory address In manual store mode the indication is red if there are data in that address In Autol mode the stor
83. ll pass value and band level values and measurement start time at preset measurement intervals Number of data Internal memory max 1 000 sets CF card max 300 000 sets Never turn off power to the unit or remove the CF card while a store operation is in progress Otherwise internal data can be destroyed When a CF card is inserted in the memory card slot of the unit use of the internal memory for store is not possible 82 Store Operation An internal rechargeable backup battery serves to keep clock setting on the unit and to store measuring data in internal memory Those data and clock set ting will be gone if the unit is not used for a certain period or the backup battery is empty The backup battery is automatically charged by the main batteries while the unit is operating Full charge of the backup battery requires approximate 24 hours Therefore copying measuring data in internal memory to CF card immediately after measurements is strongly recommended For instance the internal memory and clock setting is kept for 5 days when the backup battery is charged for 5 hours 83 Store Operation Inserting and Removing the CF Card Insert or remove the CF card as shown below Engage this section with your nail to open the cover 1 Slide 2 Lift Front side Lever CF card push to remove card Card slot CF card insertion indicator Se WS ON gt _0 0NB 00 00 07 Manual 00
84. ltaneously In this case the upper limit is 8 kHz for octave band and 12 5 kHz for 1 3 octave band Measurement results are stored directly on a CompactFlash memory card called CF card in this manual Communication with a computer is possible via the built in USB port Be cause the USB port conforms to storage specifications the NA 28 will be recognized as a removable disk when connected to a computer This allows transfer of data from the CF card to the computer without having to remove the CF card from the NA 28 USB host functionality is also provided allow ing the use of a USB printer The infrared remote control available as an option allows control of the NA 28 without a cable link The comparator output is an open collector type which can be used for control of external equipment Conversely the trigger input allows control of the NA 28 from another device Optional program cards for implementing architectural acoustics measure ments and other types of measurement are also supported Outline The Sound Level Meter NA 28 allows the following quantity measure ments Main processing sound level meter mode analyzer mode Simultaneous measurement of all items with selected time weighting and frequency weighting characteristics Sound level Ly Equivalent continuous sound level Leg Sound exposure level Lg Maximum sound level Lina Minimum sound level Lin Percentile sound level Ly C to 99 1l incre
85. ment steps max 5 values calculated from Lp OF Leg tsec In sound level meter mode in addition to the main processing items one of the following measurements can be selected Peak sound level Leak Takt max sound level Lims Frequency weighting characteristics are the same as for the sub channel Frequency weighting characteristics A C Z Time weighting characteristics main channel F S 10 ms sub channel F S 10 ms I A color LCD with backlight shows measurement parameters and measure ment values in sound level meter mode and analyzer mode The following options are available separately to further enhance the range of applications for the product Printer For producing hard copy of measurement data including stored memory data Level recorder LR 07 LR 20A No CE For recording sound level changes over time Controls and Functions Front View l Microphone Preamplifier l SOUND LEVEL METER Display ISTI O O S E 090 Operation key panel START STOP LIGHT Infrared remote control sensor wx C J Memory card slot cover Microphone Preamplifier The microphone preamplifier unit can be detached from the main unit and connected via an optional extension cable This allows use at a separate location Be sure to use only the microphone preamplifier assembly with the number as shown on the name plate of the unit Otherwis
86. ngs in memory before loading a setup file Setup File Preparing a setup file for automatic loading l Set the NA 28 to the intended condition so that measurement pa rameters and other settings are as desired To enable automatic loading a simple preparatory step is required using a computer This can be realized in two ways 1 Remove the CF card from the NA 28 and mount it directly on the computer using a CF card reader or similar 2 Leave the CF card in the NA 28 and connect the NA 28 via USB cable to the computer Check whether a folder named NA 28 SETUP SET OOOO exists on the CF card If the folder does not exist perform the steps described in the section Copying a setup file to CF card page 114 Create a folder named NA 28 SETUP STARTUP on the CF card STARTUP is not case sensitive it can be upper case or lower case Copy the setup file to use from the folder in step 4 to the STARTUP folder This completes the preparation procedure 111 Setup File Automatic loading of settings at startup 1 Insert a CF card prepared as described in the preceding section Preparing a setup file for automatic loading into the NA 28 and turn power on 2 A dialog appears asking whether to load the settings Select Yes at this dialog or wait for xx seconds until the settings are loaded If the dialog does not appear and the unit goes directly to the mea surement screen the preparation proced
87. nt Screen C gt Z 1 01 00 00 28 Store Operation Auto2 Sound level meter mode Measurement value data derived from main processing and additional processing along with information about measurement date time are stored at preset intervals Analyzer mode All pass level and band level values and main processing values are stored continuously on the CF card at preset intervals The procedure for storing data using Auto2 mode is as follows If a CF card is to be used verify that the card is inserted in the card slot the CF card insertion indicator is shown before starting the measure ment 1 Turn power to the unit on 2 Press the MENU key to bring up the menu list screen 3 Use the A V lt 1 P keys to select Store and press the ENT key 4 Use the A V keys to select Store Mode and press the ENT key Then use the A V keys to select Auto2 and press the ENT key 5 Use the A V keys to select Store Name and press the ENT key 6 Use the A V keys and gt key to specify the store name and press the ENT key MENU Store Mode ee Store Name AU2_ Moo Return gt MENU Return O gt MENU Measurement Screen START Measurement Screen O gt START 01 01 00 10 39 E 01 01 00 10 39 7 Use the MENU key to return to the main menu select Measure ment and press the ENT key IT Store Operation 8 Use the measurement menu to set the Measurement Time and Trig ger Mode 9 Set other m
88. nu Press the MENU key to bring up the menu list screen 7 Use the A V lt 1 E gt keys to select Measurement and press the ENT key The measurement menu screen appears 8 Use the A V keys to select Measurement time and press the ENT key 9 Use the A V keys to set the measurement time and the unit and press the ENT key MENU Wind Screen Correction ON 10 m lt Set measurement time Back Erase OFF Delay Time 0 S lt When a delay time is set here Lmax Lmin Type AP Trigger Mode y OFF Diffuse Field Correction SUB Channel y LN Mode measurement will start xx seconds after START STOP key is pressed Return C gt MENU Measurement Screen O gt START Z 01 01 00 03 58 Measurement menu screen START STOP key pressed Measurement start Preset Leq time delay time Time gt Time graph for delay time START STOP key pressed Measurement start Trigger event Trigger standby Preset Leg time delay time Time gt Time graph for use of trigger function 10 Press the MENU key to return to the menu list screen and use the A V lt 1 P keys to select Display Press the ENT key The display menu screen appears 63 Measurement 64 11 Use the 4 V keys to select Leq and press the ENT key 12 Use the 4 V keys to select ON and press the ENT key 13 14 mC isola MAX Hold OFF Via ___ Set Leq to ON LE Lmax ON Lmin ON LNI L05 ON LN2 L1
89. on the unit was in before it was last turned off Therefore the actual display may not always be the same MODE key START STOP STORE PAUSE CONT mso OO e Al inn LED MENU key 1O LeveL LEVEL A V keys Oe OI A V lt D keys x Ox ENT key LIGHT ae PONR 5 G8 l o I FREQ WEIGHT TIME WEIGHT keys 59 Measurement Measurement time setting 2 Use the FREQ WEIGHT key to select the frequency weighting characteristic For normal sound level measurements select the A setting When LZ Flat is selected for display the sound pressure level from 10 Hz to 20 kHz is measured with flat characteristics When LC Flat is selected for display the sound pressure level from 31 5 Hz to 8 kHz is measured with flat characteristics The frequency weighting characteristic for the sub channel must be set with the menu Use the TIME WEIGHT key to select the time weighting dynamic characteristics For normal sound level measurements select the F Fast setting When performing measurements in compliance with IEC or another standard set the frequency weighting and time weighting character istics as required by that standard The time weighting characteristic for the sub channel must be set with the menu Use the LEVEL 4 V keys to set the level range Choose a setting in which the bar graph indication registers to about the middle of the range If the OVER or UNDER indicators appear frequently chang
90. or Auto2 l aA a 10 11 12 13 Press the MENU key to bring up the menu list screen Use the A V lt 1 gt keys to select Store and press the ENT key Use the A V keys to select Store Mode and press the ENT key Use the A V keys to select Auto2 and press the ENT key Press the MENU key to bring up the menu list screen Use the A V lt 1 gt keys to select Measurement and press the ENT key Use the A V keys to select Trigger Mode and press the ENT key Use the gt key of the A V lt 1 D gt keys to display the current trigger mode Use the A V keys to select Time and press the ENT key Use the A V keys to select the trigger start time Use the gt key to respectively select Month Day Hour Minute and use the A V keys to set the value Set the trigger stop time in the same way If the trigger stop time setting is the same or earlier as the trigger start time setting the stop time setting will not be valid Make sure that the trigger stop time setting is later than the trigger start time Set the trigger interval in the same way The unit returns to the screen that was active before the MENU key was pressed Press the START STOP key to return to the measure ment screen 23 Preparations 26 Sleep Mode If time trigger has been selected for the Autol or Auto2 mode you can enable sleep mode power saving standby mode When sleep mode is enabled the unit will enter a po
91. ped by pressing the START STOP key 71 Measurement da If signal overload or an under range condition occurs at least once during measurement the indication OVER or UNDER appears to indicate that overload or under range data are comprised in the processed values During measurement the LEVEL A V keys FREQ WEIGHT key and TIME WEIGHT key function as markers The START STOP key MODE key PAUSE CONT key LIGHT key and POWER key are operative Be sure to complete all settings before starting the measurement During measurement the PAUSE CONT key can be used to pause and resume the measurement During pause the pause symbol I is shown The paused interval and the back erase interval are not included in the measurement time When the measurement is completed use the MODE key to switch the display to show the various processing results Ly means that the percentile sound level is displayed If Ly is not shown check whether Ly is set to ON on the menu screen If the indication OVER is shown the processed data include data where the sound level signal caused an overload condition If the indication UNDER is shown the processed data include data where the sound level signal caused an under range condition During measurement you can use the MODE key to check the equivalent continuous sound level as currently calculated This applies only to the nu meric level display The bar graph shows the sound lev
92. ribed in the Preparations chapter must be completed first 1 Turn power to the unit on 2 Use the FREQ WEIGHT key to select the frequency weighting char acteristic For normal measurements select A A weighting When C C weighting is selected the equivalent continuous sound pressure level Lceq 1s measured 3 Use the TIME WEIGHT key to select the time weighting dynamic characteristics Normally select the F Fast setting 61 Measurement The NA 28 performs high speed sampling of the sound pressure waveform 15 6 us 20 8 us when octave and 1 3 octave analysis is performed simul taneously to determine Leq and Lg It is therefore not affected by dynamic characteristics However the Impulse setting for equivalent continuous sound level measurement in the additional processing function is affected by dynamic characteristics 4 Use the LEVEL 4 V keys to set the level range Choose a setting in which the bar graph indication registers to about the middle of the range If the OVER or UNDER indicators appear frequently change the level range setting 5 For information about how to store data refer to the section starting on page 81 MODE key START STOP STORE PAUSE CONT senso 14D O G LA LED AA LEVEL ol LEVEL A V keys gee A V keys ENT key brd 2 o FREQ WEIGHT TIME WEIGHT keys MENU key 7 62 Measurement 6 Set the measurement time from the me
93. rigger bands MAIN AP SUB AP 12 5 Hz 16 Hz 20 Hz 25 Hz 20 kHz 1 3 octave bands Slope Level trigger 2 Single measurement is made when trigger level is ex ceeded Setting items Trigger level 25 to 130 dB 1 dB steps Trigger bands MAIN AP SUB AP 12 5 Hz 16 Hz 20 Hz 25 Hz 20 kHz 1 3 octave bands External trigger Measurement starts at falling edge of logic level signal at external trigger connector 23 Preparations Time Trigger Setting For Auto 1 Press the MENU key to bring up the menu list screen 2 Use the A V lt 1 gt keys to select Store and press the ENT key 3 Use the A V lt 1 D gt keys to select Store Mode and press the ENT key 4 Use the A V keys to select Autol and press the ENT key 5 Press the MENU key to bring up the menu list screen 6 Use the A V lt 1 P gt keys to select Measurement and press the ENT key 7 Use the A VY lt 1 P gt keys to select Trigger Mode and press the ENT key 8 The current trigger mode setting is shown 9 Use the A V keys to select Time and press the ENT key 10 Use the A V keys to select the trigger start time Use the gt key to respectively select Month Day Hour Minute and use the A V keys to set the value 11 Set the trigger stop time in the same way 12 The unit returns to the screen that was active before the MENU key 24 was pressed Press the START STOP key to return to the measure ment screen Preparations F
94. rs at least once during measurement the indication OVER or UNDER appears to indicate that overload or under range data are comprised in the processed values During measurement the LEVEL A V keys FREQ WEIGHT key and TIME WEIGHT key function as markers The START STOP key MODE key PAUSE CONT key LIGHT key and POWER key are operative Be sure to complete all settings before starting the measurement During measurement the PAUSE CONT key can be used to pause and resume the measurement During pause the pause symbol II is shown The paused interval and the back erase interval are not included in the measurement time When the measurement is completed use the MODE key to switch the display to show the various processing results LaAmax and Lamin Mean that the maximum and minimum sound level values are displayed respectively If Lamax OF Lamin 18 NOt Shown check whether Lamax OF Lamin 18 Set to ON on the menu screen If the indication OVER is shown the processed data include data where the sound level signal caused an overload condition If the indication UNDER is shown the processed data include data where the sound level signal caused an under range condition 69 Measurement During measurement you can use the MODE key to check the equivalent continuous sound level as cur rently calculated This applies only to the numeric level display The bar graph shows the sound level After the measurement
95. s Preparations as described in the Preparations chapter must be completed first l For information about how to store data refer to the section starting on page 81 2 Press the MENU key to bring up the menu list screen Use the A V lt 1 gt keys to select Display and press the ENT key The display menu screen appears Use the A V keys to select LN and press the ENT key In the factory default condition the percentile sound level values for measurement are LO5 L10 L50 L90 and L95 However any value from L01 to L99 can be chosen up to five values Use the A V keys to select the ON setting and press the ENT key Press the START STOP key to return to the measurement screen MENU MAX Hold OFF Leq ON LE ON Lmax ON Lmin ON LNI L05 ON l N2 ON Settings from LO1 to L99 are possible LN3 o0 lt ON Set required percentile ina ca OFF i sound level values to ON TINS LN List ON Time Leve ON Return C MENU Measurement Screen O gt START ml O1 01 00 10 29 Display menu screen Press the START STOP key to start the measurement While the measurement is in progress the symbol flashes and the elapsed time is displayed When the measurement time has elapsed the measurement is terminated automatically To terminate the measurement before the allocated time press the START STOP key When no display arbitrary measurement time has been selected the measurement is also stop
96. s Delay Time l to 10s Lmax Lmin Type BAND AP can be selected only in analyzer mode Trigger Mode Y OFF Diffuse Field Correction ON OFF Sub Channel V ON OFF LN Mode Lp MENU Wind Screen Correction Measurement Time Back Erase Delay Time Lmax Lmin Type Trigger Mode y Diffuse Field Correction SUB Channel y LN Mode 01 01 00 09 58 Return O gt MENU Measurement Screen C START Measurement menu screen 54 Reading the Display Trigger mode menu level Use the A V lt gt keys to select Trigger Mode and press the ENT key The following menu appears Available trigger mode settings are Level 1 Level 2 Time and EXT MENU MENU Trigger Level Trigger Band Slope Time Trigger Start Time 01 01 00 00 Trigger Stop Time 01 01 00 00 It is available Sleep Mode to set the trigger interval when the store mode is Auto 2 Return O gt MENU Return O gt MENU Measurement Screen C gt START Measurement Screen Ce START Measurement Trigger screen Level 1 Setting items Trigger level Trigger band Slope Level 2 Setting items Trigger level Trigger band Time Setting items 25 to 130 dB 1 dB steps MAIN AP SUB AP 12 5 Hz 16 Hz 20 Hz 25 Hz 20 kHz 1 3 octave bands 25 to 130 dB 1 dB steps MAIN AP SUB AP 12 5 Hz 16 Hz 20 Hz 25 Hz 20 kHz 1 3 octave bands Trigger start time trigger stop time Interval time Sleep mode EXT OFF 5 10 15 30 minu
97. s are denoted by lt CR gt lt LF gt One file contains up to 36000 data When this number is exceeded a new file 1s created Auto2 store The file name specified on the menu screen is used for the subdirectory name and the lower four digits of the header file name A new file is created for every 6000 data 101 Memory Card Formatting Initializing a CF Card Formatting initializing a CF card will erase all data present on the card A CF card can be formatted either in a computer or in the NA 28 The procedure for formatting the card in the NA 28 1s described below 1 Press the MENU key to bring up the menu list screen 2 Use the A V lt 1 gt keys to select System and press the ENT key 3 The system menu screen appears Use the A V lt 1 gt keys to select CF Card Format and press the ENT key 4 Use the A V lt 1 D gt keys to select EXEC and press the ENT key A message such as shown below appears To proceed with the format ting press the ENT key Yes MEMNU SVE ten CF Card Format Read Save Setting Fl aq lt Select EXEC and press ENT key Time Setting Y Program Information w Do you want to format Message appears CF card Press ENT key Message appears and formatting starts Yes gt ENTER No PAUSE Return gt MENU Measure View START E 01701 00 00 00 During formatting Please wait initializing System menu screen this messag
98. smax Lciomsmax LzFmax gt Lzsmax gt E71 0msmax LAENn Lasnn L A10msNn Lerno LesNn Lc10msNn LZENn gt Lzsnn gt L710msNn Lipet Lcpeak LZpeak Latms Lets L71ms The combination of peak sound pressure level and takt max with I characteristics does not exist Measurement value shown in brackets indicates items that can be displayed as operation steps but are not used or not suitable Vil Vill Quantifier Notation of Sound Level Meter NA 28 According to International Standards and JIS Excerpts from ISO 1996 3891 IEC 61672 1 2002 JIS Z 8202 8731 NA 28 Description Frequency ISO JIS notation o notation B notation Sound level A weighted sound level Equivalent continuous sound level Equivalent continuous A weighted sound level Equivalent continuous C weighte d sound level Sound exposure level A weighted sound exposure level C weighted sound exposure level Percentile A weighted sound level Maximum A weighted sound level Minimum A weighted sound level 1X Precautions Operate the unit only as described in this manual The NA 28 is a precision instrument Protect it from shocks and vibrations Take special care not to touch the microphone diaphragm The diaphragm is a very thin metal film which can easily be damaged Use only the microphone preamplifier assembly with the number as shown on the name plate of the unit Ambient conditions for operation of t
99. stores the measured sound level data and processed value data in the memory manually Pressing the STORE key causes the current sound level and the processed values derived from the measurement as well as the measurement parameters and time of measurement to be recorded If no CF card is inserted the data will be stored in the internal memory of the NA 28 If a CF card is inserted the data will automatically be stored on the card Internal memory capacity max 1000 data sets CF card capacity max 1000 data sets per file name max 100 file names Auto1 This is the store function for recording the sound level waveform Measurement time max 1000 hours Sound level meter mode Continuous store of L Leg Lmax Lmin as 1 set every 100 ms eq Sub channel measurement results cannot be stored Sampling cycle 100 ms only Lp Legs Lmax Lmin stored simul eq taneously every 100 ms Internal memory capacity max 3 hours 81 Store Operation Analyzer mode Continuous store of sound level L values for each band and all pass Main channel All pass value and band level values Sub channel All pass value Sampling cycle I ms to 1 sec Leg ts Internal memory max 10000 data 2 7 hours for 1 sec or lewd Auto2 Sound level meter mode Continuous store of main processing and additional processing values and measurement start time at preset measurement intervals Analyzer mode Continuous store of main processing a
100. tes 1 8 24 hours ON OFF Select this to use an external trigger P Reading the Display Sub channel menu level Use the A V lt 1 P gt keys to select Sub Channel and press the ENT key The following menu appears im ibi l Vieasurement SUB Chnnel SUB Channel Frequency weighting SUB Time weighthg SUB Loeak Ltm5 Return gt MEHL Measurement Screen C gt START C 01701 00 11 53 Measurement SUB Chnnel screen Print Use the A V lt 1 gt keys to select Print and press the ENT key The print menu screen appeals SLM WS ON oe 0 0MB 00 00 07 Manual 000007 BE Do you execute print Yes ENT NosPAUSE 80 0 01701 00 05 33 Printing screen 56 Reading the Display Recall Use the A V lt gt keys to select Recall and press the ENT key The Select File menu appears HELME Select File Store Name Date Internal Memory MAN_0122 2006 01 25 09 30 MAN_4320 2006 02 25 15 55 MAN_5588 2006 03 03 22 10 CF card AU1_0002 2006 02 22 08 15 AU1_0003 2006 02 03 08 55 AU2_0001 2006 03 01 08 25 Copy to CF Card STORE Delete Data gt Return 5 gt MENU Measurement Screen START im 01 01 00 00 28 Select File menu screen RECALL RECALL WSION DF 0 OMB 00 00 00 Store File AU1_001 2 Store File AU1_0012 HA I h LAF 67 8 17 6 03 03 18 33 00 i CF LCF AP i 03 03 18 33 00 Recall screen sound level meter mode R
101. time when processing was started measurement time frequency weighting time weighting dynamic characteristics trigger setting conditions processing results overload and under range information other information The T L time level graph display screen is not stored 87 Store Operation Any measurement data present in the currently displayed address will be overwritten If the address is shown in red it contains data Take care not to accidentally overwrite data When address 1000 is reached it will be overwrit ten without confirmation When the STORE key is pressed again after this the 1000 indication flashes and no more data can be stored If you change the address with the A or V key in this condition the flashing will stop and data can be stored in the newly selected address Recalling Stored Data The procedure for recalling data stored in memory using manual mode is described below 1 Turn power to the unit on 2 Press the MENU key to bring up the menu list screen 3 Use the A V lt 1 gt keys to select Recall and press the ENT key The file selection screen appears 4 Use the A V keys to select the store name whose data you want to recall and press the ENT key The data stored in memory are displayed 5 In analyzer mode the GRP NUM key can be used to switch between numeric display and graph display 88 Store Operation MODE key STORE PAUSE CONT START STOP S
102. ure may not have been successful Check the folder name STARTUP and the file name NA28SETO rns The saved settings will be loaded and reflected in the operating condi tion of the NA 28 112 Setup File Saving a setup file Save procedure 1 Set the NA 28 to the intended condition so that measurement pa rameters and other settings are as desired 2 Onthe menu screen select System then select Read Save Setting and press the ENT key 3 Bring the cursor to any position between No and No 5 and use the STORE key to save the settings If settings are already stored in the specified number a dialog con firming the overwrite will appear When the indication Settings have been saved appears the process is completed This procedure saves the settings in the internal memory of the NA 28 up to five different settings numbered 1 through 5 can be saved KAHIR Sotem Sett ing i Sctem Sett ing Load Default Load Default No 1 2005 12 08 08 35 No 1 2005 12 08 08 35 No 2 2005 12 09 09 55 No 2 2005 12 09 09 55 No 3 2006 01 15 11 22 Setting was saved Group Save for CF f Group Loading Delete for CF fy OK gt gt ENTER Load Setting gt Load Setting Save Setting O gt STORE Save Setting gt STORE Delete Setting O gt Delete Setting gt Return O gt MENU Return O gt MENU Measurement Screen C START Measurement Screen C START Z 1 01 00 00 14 ZI 01701 00 00 15 Select
103. ween pressing of START STOP key and actual measurement or trigger monitoring Start 0 to 10 seconds in 1 s steps When measurement is paused with PAUSE CONT key data from 5 second interval before key was pressed are excluded from processing Sound level values and processing results are stored in manual store or auto store mode Data can be stored in internal memory or on CF card Internal memory has 1 block for which manual store auto store 1 or auto store 2 can be selected Manual store Auto store Autol Specifications Data for selected measurement results and measure ment start time are stored manually in single address increments Data store capacity Internal memory max 1000 data sets CF card max 1000 data sets per store name The number of store data depends on the capacity of CF card Measurement results are stored continuously at preset intervals Up to 4 markers can be added to identify particular events during recording Measurement time max 1000 hours using CF card individual recording when using internal memory Sound level meter mode Continuous store of Ls Bere Lamaze Lmin as 1 set every 100 ms on CF card Sub channel measurement results cannot be stored Sampling cycle 100 ms Lo Legs Lmax Lmin only Internal memory max 3 hours Analyzer mode Continuous store of sound level Ly values for each band and all pass on CF card Main channel All pass value and band level values Sub
104. wer saving standby condition before the measurement is started and during intervals between measurements In this mode power consumption is reduced to about 1 3 The LCD panel is off and the indicator LED flashes in blue once every 5 seconds To check the measurement settings in standby mode simply press any key except the POWER key The display will come on temporarily and will turn itself off again if no further operation steps are taken During standby the AC and DC outputs USB port remote control and comparator functions are also disabled If one of these functions is required set the sleep mode to OFF During time trigger standby the store name trigger start time trigger stop time and Interval time are shown If the sleep mode has been set to OFF the unit will consume the normal amount of power also during standby 1 Select Measurement from the menu list and press the ENT key 2 Use the A V lt 1 gt keys to select Trigger Mode from the menu and press the ENT key 3 Use the A V keys to select Time and press the ENT key 4 Use the A V keys to select Sleep Mode set it to ON and press the ENT key 5 Press the MENU key several times to return to the measurement screen MENU HELER Messurement lrigger Trigger Mode Time Trigger Start Time 01 4 Leve11 Trigger Start Time 01 31 10 55 Trigger Stop Time 01 q Leve12 Trigger Stop Time 01 31 12 00 Interval Time Time Select Time Interval Time O
105. y POWER GA SLM LWS ON 0 OMB DET WS ON 0 OME 00 00 00 000 00 00 00 000 Store File AU1_0012 Store File AU1_0012 Marker 1 Marker 1 LAF 67 8 LCF dE C A 16 63 250 Tk dk TBRHe dB KEINE LAF AP 52 0 dB m oct 16 Hz 34 0 dE E LCF AF a60 dE 03 03 18 33 00 iE 03 03 18 33 00 Recall screen sound level meter mode Recall screen analyzer mode 95 Store Operation 96 Erasing Stored Data To erase stored data proceed as follows L 2 Press the MENU key to bring up the menu list screen Use the A V lt 1 gt keys to select Recall and press the ENT key The file selection screen appears and stored data are displayed Use the A V keys to select the data that you want to erase Press the CAL key A confirmation message appears To erase the data press the ENT key To cancel the process press the PAUSE key MiB Select File Store Name Date Internal Memory MANUAL 2006 02 26 15 22 MANUAL 2006 02 27 15 42 CF card AU1_2345 2006 02 28 16 15 AU1_3333 2006 02 29 18 06 Copy to CF Card gt STORE Delete Data Return O gt MENU Measurement Screen O gt START ZI 01 01 00 00 28 Select data to erase with A V keys and press CAL key HSLS Select File Store Name Date Internal Memory MANUAL MANUAL 2006 02 26 15 22 2006 02 27 15 42 Do you want to erase the data yes gt ENT No gt PAUSE Copy to CF Card o gt Delete Data G Return G gt Measureme
106. y cards available separately from Rion Co LTD The memory cards that can be used in this unit are CompactFlash TM cards CompactFlash is a trademark of San Disk Corporation Memory cards even from the same manufacturer and of the same type exhibit certain variations in specifications which may cause problems For this reason be sure to use only the memory cards offered by Rion Co LTD When using spreadsheet software or other programs on a computer to retrieve data from memory cards some programs may not be able to read the original file names from the card In such a case rename the file using the extension txt for example AU1 0001 txt For software that identifies files by the file name extension set the software up for reading text files About the store data format Data stored on the memory card are in CSV format Various files and subdi rectories are created on the card depending on the store mode Manual store The file name specified on the menu screen is created as a 4 digit number under the subdirectory name 100 Memory Card Auto1 store The file name specified on the menu screen is used for the subdirectory name and the lower four digits of the header file name The header file contains measurement parameters and other information The data file contains the sound pressure level over range information O under range information U and pause information P in CSV format Line return

Rion NA-28 User Manual - Acoustic Research Labs Pty Ltd

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