Rion NL-27 User Manual
Contents
1. Battery compartment Tripod mounting thread Mount the unit on a camera tripod with this thread Battery compartment Insert two size AAA IEC LRO3 batteries here Batteries Inserting the Batteries Make sure the unit is turn off before inserting the batteries Remove the battery compartment cover on the rear of the unit 2 Insert two size AAA IEC LRO3 batteries into the battery compartment Insert correctly as indicated in the compartment 3 Replace the battery compartment cover Press and pull in the arrow direction d contact J Remove the battery Insert two size AAA compartment cover IEC R03 LRO3 batteries Take care not to reverse the polar ity when inserting the batteries If batteries are inserted with wrong polarity the unit will not operate Always use two identical batteries and replace batteries only as a set Mixing battery types or old and new batteries can lead to damage Remove the batteries from the unit when it is not used Do not subject the battery connectors to strong force or stress Damaged springs can lead to loss of proper battery contact Battery life at 23 using wide range Manganese batteries approx 3 hours Alkaline batteries approx 9 hours Battery life will be reduced by 20 when DC output cable is connected2. mg Z E gt in gt Response dB in RS e o 10 00 1000 0 000 100 000 Frequency Hz Fig 4 Influence of WS 14 on acoustic performance of NL 27 Referenced to NL 27 characteristics 41 The greatest susceptibility configuration for radio frequency fields Ferrite cores 2 S8 mg 5 Computer NN ES CC 98S Polarization direction is parallel to drawing plane Antenna Fig 5 The greatest susceptibility configuration for radio frequency fields 42 Statement of conforming to the basic statement Tab 1 Statement of conforming to the basic statement Immunity to AC power The specification of IEC 61672 1 Class 2 is frequency fields satisfied Immunity to RF fields The specification of IEC 61672 1 Class 2 is satisfied f S8 mg Z 5 Emissions The specification of IEC 61672 1 Class 2 is satisfied Adjustment data for sound calibrator Tab 2 Adjustment data for sound calibrator Frequency Hz Correction dB 8000 3 2 12500 6 5 16000 The lower and upper limits of the linear operating range Tab 3 The lower and upper limits of the linear operating range A weighting Sound level dB Frequency Hz
3. cu 7 Battery indication Indicates battery charge When the indicator starts to flash cor rect measurement is no longer possible Replace the batteries with fresh ones MIL gt B x Full charge Indicator flashing replace the batteries If the indicator starts flashing during process ing processing will end at that point You cannot start processing with the START STOP key when the battery indication is flash ing Attachments Windscreen We recommend attaching the windscreen to reduce wind noise Windscreen fall out prevention rubber hereafter called fall out prevention rubber Prevents the windscreen from dropping off the microphone This is attached to the unit at the time of shipment The windscreen can easily drop off the unit So we recommend attaching the fall out pre vention rubber Be sure to follow the instructions in the fol lowing diagram when attaching or detaching the fall out prevention rubber Turning it in the opposite direction may loosen the microphone and cause it to fall off Windscreen Fall out prevention Turm the fall out rubber d urn the fall ou E prevention rubber t only in this direc tion RION SOUND LEVEL METER 27 Silicon cover The silicon cover protects the unit from shocks and also makes it easier to grip when held Fit it to the unit with th
4. Lg lt gt Address Leg Lmax Lg lt gt Address 1 L7 Lmax Lg eq Press and hold the START STOP or the MODE key to move through the addresses faster gt Address 1 Address Address 1 To return to the measurement screen Press the A C CAL key 19 Clearing stored data Press the A C CAL key for 3 or more seconds while the recall screen is shown and a screen asking you to confirm clearing of the data appears un ALL and CLr flash alternately on the screen ev ery 0 5 seconds Data clear confirmation screen Press the START STOP key and all stored data is cleared then the recall screen appears again Press the A C CAL key to cancel the operation and return to the recall screen Initializing Power the unit on while pressing the START STOP key and the settings in the unit are initialized Initial setting values Measurement time 10 m 10 minutes Time weighting characteristics Fast Level range Wide Address 1 20 Specifications Applicable legislation Measurement functions Processing type Measurement times Microphone Measurement level range Total range The Japan measurement law Sound level meter JIS 1509 1 2005 Class 2 IEC 61672 1 2002 Class 2 CE Marking EMC Directive 2004 108 EC WEEE Directive Chinese RoHS units shipped to China only Sound level L
5. 31 5 Ik 4k 8k Upper Start Lower C weighting Sound level dB Frequency Hz 31 5 1k 8k Upper Start Directional Characteristics The directional characteristics of NL 27 is a measure of its dif fering sensitivity for sound waves arriving from various angles Since the electret condenser microphone used in the NL 27 is a pressure sensitive type it should be equally sensitive in all directions However refraction and cavity effects cause a certain microphone directional response at high frequencies S S8 mg 2 5 Fig 6 Directional Characteristics with Horizontal Direction 44 Tab 5 Directional Characteristics with Vertical Di rection Frequency Hz 7499 Tab 4 Directional Characteristics with Horizontal Direction Frequency Hz 1000 1995 3981 7499 1000 1995 3981 ue S8 mg Z E 45 Random incidence response 9 2 0 ma E 2 Response dB IN 10 10 100 1000 0 000 100 000 Frequency Hz Fig 8 Random incidence response 46 No 53732 09 07
6. 9 2 5 e 9 2 5 f 9 2 5 g 9 2 5 h Initial time interval after switch ing on power Time interval for completion of the integration Procedure to preset the integra tion time amp time of the day Statement of the minimum amp maximum integration time 34 5 17 2 Refer to 5 17 2 Measurement Measurement of maximum time weighted sound level 331 10 9 2 5 j Operation of the reset function or Measurement results Lg Lpeak and overload measurement val ues overload indi cation under range indication are reset when a new measure ment is started Time required for measurement initial ization lt 1 second 9 2 5 k amp interpretation of 5 10 1 Refer to 5 10 1 overload indicators 9 2 51 Operation of user selectable 5 14 Refer to 5 14 thresholds 9 2 5 Description of method for trans 5 15 7 Refer to 5 15 7 ferring data to PC 9 2 5 Length amp type of interface cable 5 18 1 Refer to 5 18 1 and characteristics of connected devices 9 2 50 Self noise at the more sensitive 5 6 1 Refer to 5 6 1 ranges including microphone Averaging time 2 30 s 9 2 5p Characteristics of AC and DC 5 16 1 Refer to 5 16 1 output Accessories 9 2 6 Effect of windscreen direc 7 2 Refer to 7 2 tional response and frequency weighting 9 2 6b Corrections for microphone cable Refer to 7 1 9 2 6 Use of bandpass filters Refer to 7
7. D 5 Menu settings In the measurement screen press and hold the A C CAL key to switch to the menu screen not available during processing Range setting Press the START STOP key or the MODE key to select the following range settings Wide Measurement range 30 to 130 dB Lepeak cannot be processed m When wide range is 50 selected 30 130 z e Flashes 2 0 5 seconds E Peak Measurement range 65 to 130 dB Lepeak be processed Even if the frequency weighting characteristic is A Lepeak 15 processed as im When peak range is T selected ES every M di 0 5 seconds Press the A C CAL key to switch to the time weighting char acteristic settings Press and hold the A C CAL key to return to the measurement screen Setting time weighting characteristics Press the START STOP key or the MODE key to select the following settings F fast S slow Press the A C CAL key to switch to the measurement time settings Press and hold the A C CAL key to return to the measurement screen Om en 30 80 E gt Flashes every 0 5 seconds Setting measurement time Press the START STOP key or the MODE key to select the following settings 1 m 1 minute 5 m 5 minutes 10 m 10 min utes 1 h 1 hour Press the A C CAL key to return to the measurement screen Flashes every d 0 5 second
8. Equivalent continuous sound level Leq Sound exposure level Lg Maximum Sound level Lmax C weighting peak sound level measurement possible only when peak range is selected minute 5 minutes 10 minutes or 1 hour 1 2 inch electret condenser microphone Model UC 52 Sensitivity 33 dB 3 dB re 1 V Pa Wide range A weighting 30 dB to 130 dB C weighting 36 dB to 130 dB Peak range A weighting 65 dB to 130 dB C weighting 65 dB to 130 dB 30 dB to 137 dB A weighting 1 kHz Peak sound level measurement range Inherent noise level 65 dB to 140 dB Wide range A weighting 24 dB or less C weighting 30 dB or less Peak range A weighting 59 dB or less C weighting 59 dB or less 2 En fe 7 o 5 Measurement frequency range 20 Hz to 8 KHz Reference frequency 1 kHz Reference sound pressure level 94 dB Frequency weighting characteristics and Time weighting characteristics fast and S slow Level range Wide range 30 to 130 dB Peak range 65 to 130 dB Peak range is used when measuring peak sound level RMS detecting circuit Digital processing Processing Digital Sampling interval 30 3 us Ly Leg Lmax Lg Lepeak Calibration Calibration frequency 1 kHz Calibration sound pressure level 94 dB The Japan measurement law Electronic calibration using an in ternal electronic signal JIS IEC sound calibration usi
9. Measurement screen and processing screen Measurement time Elapsed time Processing bt mark 5 Om 0000 30 190 Sound level under range indication s 36 Address number Battery indica tion Bar graph lev el range scale Sound level overload indi cation Processing re sult under range indication dB Processing re sult overload indication Level indication Processing re sult symbol Frequency weighting characteristics Time weighting characteristics Measurement time The measurement time set in the menu screen see state transi tion diagram page 11 Elapsed time The amount of time elapsed since processing started Address number The address where the processing result the next process result in the measurement screen is stored Battery indication Indicates battery charge see 5 Bar graph level range scale Shows the sound level in a bar graph Sound level overload indication Shows that the sound level has exceeded the measurement range 1 5 1U9WSINSLIIN Processing result overload indication Appears during processing when the sound level exceeds the measurement range and remains until the next process starts when a processing result is shown Level indication Shows the sound level L and each processing result Leg Lmax Lg and as digits Switch the display with the MODE k
10. Nominal range of Lcpeak at for 5 12 1 Refer to 5 12 1 each level range 9 2 2f Operation of the level range 5 1 12 Refer to 5 1 12 control 9 2 2 g Description of the display and 5 15 2 3 Refer to 5 15 2 3 update rates 4 5 4 5 2 Design goals and tolerances N A for quantities which are not in the standard T weight 10 ms Battery types amp battery life 5 20 3 Refer to 5 20 3 Description of the function of Batteries Dis 9 2 2j Computer software to operate 5 1 8 Refer to 5 1 8 the SLM play Operation from an external 5 20 4 Refer to 5 20 4 power supply 9 2 3 d Public power supply voltage Refer to 5 20 5 Adjustment to indicated levels 9 2 4a Model of sound calibrator s Refer to 5 2 1 9 2 4b Calibration check frequency HkHz 9 2 4c Procedure for calibration amp ad 5 2 3 Refer to 5 2 3 justment with sound calibrator 33 291 10 uonduioseg Data for correction with and without windscreen for Deviation of average frequency response to uniform frequency response Casereflection and microphone diffraction Including values for expanded uncertainties In 1 3 octave frequencies for 63 Hz to 1 KHz and 1 12 octave fre quencies for 1 kHz to 16 kHz Operating the sound level meter 9 2 5 Reference direction 5 1 13 Refer to 5 1 13 Procedure to measure sound Influence of the instrument case and operator Recommendation for selecting optimum level range 9 2 5 c
11. WS 14 on acous tic performance of NL 27 Compliant with IEC 61672 1 JIS C 1509 1 with Windscreen WS 14 mounted Operation of 1 1 1 3 octave 9 2 6 N A band filters Details about connection amp ef fects of auxiliary devices 9 2 6 d Attachments Instruction manual 2 1 9 2 1 Description of type classification X Y Z and class Overall configuration Normal operation configuration including windscreen Refer to 5 1 4 Refer to 5 1 7 Group X Class 2 Models of microphones 5 1 6 Refer to 5 1 6 9 2 1 Characteristics amp operation each 9 2 1 d Required microphone cable to N A conform 32 Description of quantities which can be measured time weighted sound level equivalent continuous sound level maximum val ue of time weighted sound level sound exposure level sound level 331 10 Te TR 9 2 25 Relative free field response as Directional Charac function of incidence angle and teristics with Hori frequency detailed tabular de zontal Direction scription Fig 6 Vertical Direction Fig 7 9 2 2 Description of the frequency 5 1 10 Refer to 5 1 10 weightings 5 4 12 Refer to 5 4 12 9 2 2 4 Description of the time weight 5 7 1 Refer to 5 7 1 ings 9 2 2 dentification of the level ranges 5 1 12 Refer to 5 1 12 A weighted 1 kHz x e 9 2 2h Total range of A weighted SPLIS 1 12 Refer to 5 1 12 kHz 9 2 2 i
12. ad 9 2 4 Calibration justment with sound calibrator Acoustic cali bration with Sound Calibrator NC 74 93 9 dB 27 331 10 331 10 uonduioseg Data for correction with and without windscreen for Deviation of average frequency response to uniform frequency response Casereflection and microphone diffraction Including values for expanded uncertainties In 1 3 octave frequencies for 63 Hz to 1 KHz and 1 12 octave fre quencies for 1 kHz to 16 kHz Adjustment data for sound cali brator or electrostatic actuator for A weighted sound levels 9 2 4 d 9 2 5 b Fig 2 Frequency response of the microphone UC 52 including the case reflection Fig 4 Influence of WS 14 on acous tic performance of 5 4 Frequency weightings 5 4 12 Frequency response amp toler ances of optional frequency responses Level linearity 5 5 9 A C and Z weighted levels for the lower and upper limit of the linear operating range Starting point for the level lin earity error 5 5 11 How to test level linearity if dis play range linearity range 5 6 1 Self noise at the more sensitive ranges including microphone the linear operating range ps Self generated noise 9 2 5 9 3 h Maximum value A 24 dB C 30 dB Self noise at the more sensi 9 3 Dummy microphone tive ranges with dummy micro phone 331 10 To TR Time weighting an
13. 4 9 2 6 d Connection of auxiliary devices Refer to 7 5 Influence of environmental conditions 9 2 7 Components intended for opera None tion in controlled environment 9 2 7 b egradation of functions by 6 5 2 Refer to 6 5 2 electrostatic discharge 9 27 Statement for conformance to Statement of con AC power frequency fields and forming to the basic RF fields statement Tab 1 331 10 uondnos q 9 3 d For A weighted sound levels Adjustment data for multi fre quency sound calibrator and or electrostatic actuator Nominal A weighted sound lev els at the upper and lower limits of the linear operating range on each level range For frequencies 31 5 Hz 1 4 8 and 12 5 kHz Starting point for the level lin earity error For frequencies 31 5 Hz 1 4 8 and 12 5 kHz At the reference level range Dummy microphone Design goal and tolerance 9 3 h 9 3 k Self noise at the more sensitive ranges with microphone and with dummy microphone Highest SPL and Peak Peak input voltage to accommodate Maximum and minimum power supply voltage How to test level linearity if dis play range lt linearity range 9 3 1 Time interval for needed to stabilize 6 1 2 after environmental changes i torming 6 6 4 9 3 m Field strength for conforming in case 10 V m Operating mode or highest radio frequency emissions 36 Operating mode with least im munity to AC power frequency fields and RF fiel
14. C 98S State transition diagram functions and operation keys Startup Power on Processing screen START STOP key 1 Measurement Frequency weight START STOP key or ing characteristic after the measurement A time has elapsed sA C Cal key v Frequency weight ing characteristic C r L sA C Cal key e Calibration Screen Internal calibration 7 Reduce volume with sA C Cal key the START STOP key External calibratio Raise volume with the MODE key sA C Cal key L Move the address v down with the START STOP key Recall screen Move the address up A C Calkey with the MODE key 10 Pressing the MODE key in the measurement screen or processing screen changes the display in the following order L L eq Lmax 7E Lopeak gt Lp P Lcpeak Only appears when peak range is selected Press and hold the A C CAL key Press and hold the A C CAL S Range setting Wide Peak Menu screen e 0 Change the setting with the START STOP key or MODE key lt A C Cal key ina ti Change the setting with the tting tim 5 char START STOP key or MODE key acteristics FSS A C Cal key Change the setting with the START STOP key or MODE key 1mo5mol0molho olm A C Cal key Setting meas urement time 11
15. INSTRUCTION MANUAL Sound Level Meter NL 27 CB RION CO LTD 3 20 41 Higashimotomachi Kokubunji Tokyo 185 8533 Japan http www rion co jp english FOR SAFETY In this manual important safety instructions are specially marked as shown below To prevent the risk of death or injury to persons and severe damage to the unit or peripheral equipment make sure that all instructions are fully understood and observed Disregarding instructions printed here incurs the risk of damage to the product Note Mentioned about the tips to use this unit properly This messages do not have to do with safety Precautions Operate the unit only as described in this manual Do not touch any parts of the unit other than necessary for operation Do not drop the unit Protect it from shocks and vibration The permissible environmental temperature range for operation of the unit is 10 to 50 C Relative humidity must be between 10 and 90 Do not use or store the unit in locations which may be subject to water direct sunlight high temperatures or humidity Also protect the unit from air with high salt or sulphur content gases or the influence of chemicals Do not forget to turn the unit off after use Remove the batteries if the unit is not to be used for some time When disconnecting cables always hold the plug and do not pull the cable To clean the unit use only a dry cloth or
16. a cloth lightly moistened with water Do not use chemical cleaning cloths solvents or alcohol based cleaners to prevent the possibility of deformation and discoloring Do not insert any objects such as pins metal scraps conducting plastic etc into any opening on the unit Do not disassemble the unit or attempt internal altera tions Incase of malfunction do not attempt any repairs Note the condition of the unit clearly and contact the supplier When disposing of the unit or the batteries follow national and local regulations regarding waste disposal Contents PRE CAU EONS ELS AEEA 1 GO 1 Controls and EUC 2 lias R vies CE Windscreen Windscreen fall out prevention rubber 6 SICON COVE d 7 Hand m Connecting external equipment 0 cece State transition diagram functions and operation keys 10 Measurement screen and processing screen 12 POWeron aNd OFF usen ro a alan eer b CI CH aba 14 UU D 4 15 Menu Setlnps n ae 16 NJ 18 Recalling stored io Y no DOO OX 19 Initializing O 21 Description tor TEG 61072 uc cane 26 IEC61672 1 JIS C 1509 1 Frequency 37 Reference incidence direction and reference point
17. d 5 71 Description of time weightings 9 2 2 d S that are provided 5 10 5 11 Overload and Under range indication Operation amp interpretation 9 2 5 Measurement overload indicators screen and pro cessing screen Operation amp interpretation of Measurement under range indicators screen and pro cessing screen Peak C sound level 5 121 Nominal range of LCpeak atfor 9 2 2 i gt Specifications each level range Thresholds 5 Operation of user selectable 9 2 51 N A thresholds 14 5 15 Display Description of the indication 9 2 2 g Measurement displayed quantities screen and pro cessing screen Description of the display 9 2 2 g gt Measurement screen and cessing screen quantities the integration ferring data to PC 29 291 10 uondioseg 5 16 Analogue and digital outputs Electric output connector AC output Electric output connector DC output Frequency weight ing Z 600 mVrms 1 Vrms 400 mVrms at 110 dB Output range 1 8 Vrms or less Output impedance Frequency weight ing A C Output voltage 3 0 V at 130 dB 25 mV dB Output range 0 5to 3 2 V Output impedance Timing facilities zh RF emissions and power supply disturbance 5 171 Procedure to preset the integra tion time amp time of the day 5 17 2 Statement of the minimum amp maximum integration time 5 18 1 Length amp type of interface cable and characteri
18. ds 5 5 10 Refer to 5 5 10 3 T 15 Refer to 5 1 15 Refer to 5 6 1 5 6 3 Refer to 6 6 1 6 10 160 20 2 31 40 50 63 1000 1120 1180 1250 1320 1400 199 5 3 1412 5 oo 00 oo oo oo 00 oo 00 oo 00 oo oo oo 00 oo 00 oo oo oo 00 oo 00 oo 00 oo 02 expanded uncertainty 1500 1600 1700 1800 2000 2120 224 2360 2500 2650 80 160 iooo il20 1180 1250 MIU 1600 1700 1800 1900 2000 2120 2240 2360 2500 2650 496 1 1 1 1 0 0 0 3 01 01 0 1 00 00 00 00 00 00 00 00 0 00 00 00 00 00 o0 00 00 0 0 0 0 0 0 0 0 0 0 0 00 00 03 o1 01 0 1 1 1 1 1 2 2 2 2 fet 0 3 06 3000 29854 0 4 08 o1 o4 08 01 3150 00 00 04 06 0 3 o1 o1 2 37 331 10 Total expanded Response dB case reflec 4 02 4500 4466 8 5000 501 9 0 3 os oo os 00 291 10 uonduoseg 4 6700 6683 4 0 1 38 Reference incidence direction and reference point position Reference direction of incidence Reference point positio
19. e windscreen removed as shown in the following diagram You cannot use external connector when the silicon cover is fitted You can attach the hand strap to the silicon cover strap mount SOUND LEVEL METER NL 27 Silicon cover strap mount Hand strap To help prevent dropping of the unit pass your wrist through this strap when holding the unit for measuring Attach the hand strap as shown below Strap mount P Hand strap When you have not fitted the silicon cover Silicon cover Nea mount When you have fitted the silicon cover Attach the hand strap to the silicon cover if you have fitted the unit with the silicon cover Connecting external equipment You can connect external equipment such as a data recorder level recorder or computer to the external connector Connect as shown in the following diagram The connector has the ability to act as a DC out connector an AC monitor output connector or a USB connector but it can perform only one of these functions at a time External connector RION SOUND LEVEL METER NL 27 Data recorder DA 20 or DA 40 etc DC output cable CC 98D Connect to the DC input connector Data recorder DA 20 or DA 40 analyzer SA 01 or SA 78 etc Connect to the AC input connector AC monitor output cable CC 98A A ter etc USB adapter cable Connect to the USB connector C
20. easurement of L L and Lg Peak range Along with the processing results for wide range this range also measures Lcpeak but the lower limit for measurement becomes 65 dB eq Resume function The following items maintain the same settings they had when you turn the unit off the next time you turn the unit on Measurement time Time weighting characteristics Level range Address indication The following items have predefined settings upon startup Frequency weighting characteristic A Display processing value type L Controls and Functions Front Panel Microphone Preamplifier RION SOUND LEVEL METER NL 27 mn 5 1 5 pue 51013009 MODE key START STOP A C CAL iU START STOP key FO A C CAL key POWER key Microphone preamplifier Microphone and preamplifier are integrated in a single enclosure An extension cable cannot be used START STOP key Press to start or stop processing Also used to change setting values in the calibration screen menu screen and recall screen MODE key Changes the processing result display in the measurement screen and processing screen Also used to change setting values in the calibration screen menu screen and recall screen A C Cal key This key selects the frequency weighting characteristics calibra tion screen and recall screen Pressing and holding this key in the measureme
21. ey Lcpeak 18 processed and shown only when peak range see page 16 is selected Time weighting characteristics Shows the time weighting characteristics selected in the menu screen Processing result symbol Shows the relevant symbol for the displayed processing result Leg Lmax Lg or Lcpeay Frequency weighting characteristics Change with the A C CAL key See the state transition diagram page 10 Processing result under range indication If the sound level falls below the measurable limit 0 6 dB dur ing processing this appears until the next process starts when processing result is shown Sound level under range indication Appears when the sound level falls below the measurable limit 0 6 dB Processing mark Flashes during processing 13 D 9 0 AE 928 53 5 Power and off Press the POWER key for 0 5 seconds more to turn the power Do on or off EE Fin Measurement Selecting frequency weighting characteristics In the measurement screen press the A C CAL key to select either frequency weighting characteristic A or C See the state transition diagram on page 10 Processing measurement Press the START STOP key to start the processing The processing mark flashes during processing Additionally pressing the MODE key switches the display to show processing results Lp Leg Lmax Lg or Lepeak made up to that point Processing stops when the measurement time elapses
22. n Center of diaphragm plane S8 mg Z E Fig Reference incidence direction and reference point position Frequency Response The frequency response of a sound field microphone is ex pressed as the frequency response in the reference direction of incidence 0 The diagram below shows an example for the frequency response of the microphone UC 52 3 0 2 5 2 0 15 1 0 Response dB 0 5 0 0 0 5 1 0 1 5 2 0 2 5 3 0 LL 10 00 1000 10 000 00 000 Frequency Hz Fig 2 Frequency response of the microphone UC 52 39 Effect of Windscreen WS 14 The windscreen WS 14 reduces measurement errors due to wind noise The WS 14 characteristics are shown below 2 7 S8 mg 2 5 Frequency weighting A 120 NL27 With WS 14 ee o a Wind noise level dB oo B gt 1 10 100 Wind velocity m s Frequency weighting C 9 NL27 With WS 14 Wind noise level dB 1 10 100 Wind velocity m s Fig 3 Wind noise reduction effect 40 ges de ou S8
23. ng NC 74 Windscreen Conforms to JIS C 1509 1 Class 2 and IEC 61672 1 Class 2 even when the windscreen is attached Display TN positive display reflective type Numeric readout 0 1 dB resolution Bar graph Scale range 100 dB resolution 5 dB display update cycle 0 1 s Warning indications Over overload appears at 137 4 dB at 1 kHz Under underload appears at measure ment lower limit 0 6 dB Battery indication Battery charge is indicated in 3 stages Storing processing results Processing results stored in the internal memory when processing ends Storing capacity 199 pieces of data 22 DC out connector AC monitor output connector USB connector Power requirements Stored data can be viewed in the recall screen The stored data can also be sent to a computer through an optional USB adapter cable DC output 3 V full scale 25 mV dB Output impedance 500 Load impedance 10 or more AC output 1 Vrms rs mrs at 110 dB Upper limit 1 8 Vrms Overload 2 dB Output impedance 6000 Load impedance 10 or more Frequency weighting characteristics Z weighting Use an optional USB adapter cable to send stored data to a computer 2 size AAA LRO3 batteries Power consumption Approx 80 mA when operating at 3 V Approx 30 in sleep mode Battery life at normal temperature Wide range Approx 9 hours using alkaline batteries Approx 3 hours using manga nese batteries Peak range Ap
24. nt screen changes it to the menu screen POWER key Turns the unit on and off Side View Strap mount WE ES External connector DC connector 5 1 Et 3 AC monitor output connector USB connector pue sj011u09 External connector This connector is composed of a DC out connector an AC moni tor output connector and a USB connector The connector can only be used for one purpose at a time DC out connector ADC signal corresponding to the sound level can be output from here The signal after frequency weighting time weighting and logarithmic compression is output here constant output when a DC output cable is connected Connect the unit with the optional DC output cable to external equipment AC monitor output connector An AC signal weighted with frequency weighting characteristic Z is output here constant output when an AC monitor output cable is connected Connect the unit with the optional AC monitor output cable to external equipment When 110 dB is displayed output is 1 Vrms T The upper limit of the output voltage is 1 8 Vrms USB connector Connect the unit with the optional USB adapter cable to com puter and send stored data Download the necessary software from our homepage Strap mount Attach the hand strap here see page 8 Pass your wrist through this strap when holding the unit for measuring Rear View Tripod mounting thread
25. or you press the START STOP key Storing processing data When processing stops the Leg Lmax Lg process ing results are automatically stored and the address number increases by one Calibration Internal calibration calibration with an electronic signal Calibration with the built in oscillator 1 kHz sinusoidal wave In the measurement screen press the A C CAL key to switch to the internal calibration screen See the state transition diagram on page 10 Internal calibration screen 60 80 Int Cal and 94 04 30 uu 130 appear on the display LU Int Cal 94 0 The frequency weighting characteristic is fixed to L LI 11 NM the time characteristic is fixed to Press the START STOP key Down or MODE key Up to adjust the volume to 94 0 dB Sound calibration calibration with a sound calibrator Use optional sound calibrator NC 74 In the internal calibration screen press the A C CAL key to switch to the sound calibration screen Sound calibration screen Aco and Cal appear 12 on the display The frequency weighting characteristic is fixed to C and the time weighting char acteristic is fixed to F Attach the microphone to NC 74 and turn NC 74 on Wait at least 30 seconds then press the START STOP key Down or MODE key Up to adjust the volume to 93 9 dB 15 c 5
26. position 39 IRFEQUENCY RESPONSE 39 Effect of Windscreen Wo 40 The greatest susceptibility configuration for radio frequency fields 42 Statement of conforming to the basic statement 43 Adjustment data for sound calibrator sse 43 The lower and upper limits of the linear operating range 43 Directional CharacteristigS aaa 44 Random incidence responser eese retra eto toot tern annee 46 Outline This unit is a sound level meter that complies with the Japan measurement law JIS and IEC The microphone is a 1 2 inch electret condenser UC 52 It has a wide 107 dB linearity range measuring sound levels between 30 and 130 dB with no need to select the range The unit has an LCD panel operation keys an AC monitor output connector a DC out connector and a USB connector It is able to measure the following items Sound level L Equivalent continuous sound level Maximum sound level Fax Sound exposure level Lg C weighted peak sound level You can send data you have stored with the manual store func tion through a USB adapter cable optional accessory to a computer It is powered by two size AAA batteries The main unit and preamplifier are a single unit so it is not possible to extend the microphone This unit has the following two level ranges Wide range This measures the range between 30 and 137 dB and allows simultaneous m
27. prox 7 hours using alkaline batteries Approx 2 hours using manga nese batteries Battery life will be reduced by 2096 when a DC output cable is connected Power consumption increases by ap proximately 2046 during calibration 2 En 7 23 o 5 Environmental conditions for operation Dimensions Weight Supplied accessories Windscreen Hand strap 10 to 50 10 to 90 No condensation Approx 120 mm H x63 mm W x23 5 mm D Approx 105 g including batteries WS 14 1 63 017 1 Windscreen fall out prevention rubber Silicon cover Size AAA alkaline batteries Instruction Manual Inspection certificate Optional equipments 24 Sound calibrator AC monitor output cable DC output cable USB adapter cable NL 27 014 NL 27 026 NC 74 CC 98A CC 98D CC 98S 63 23 5 e soum eveL NL 27 C Left Side View Front View Right Side View 00 lt 2 Rear View D En Dimensional Drawings Unit mm f 25 331 10 uonduoseg Description for IEC 61672 1 paragraph also Performance specifications Configuration amp normal mode of operation Models of microphone Appropriate procedures for use the sound level me
28. s 80 30 130 17 sBuljjes nus Sleep mode With the measurement screen being shown and no key is pressed for 10 minutes the unit enters sleep mode and the sleep mode screen appears Power consumption is 30 of normal in sleep mode Situations where the unit will not enter sleep mode The unit will not enter sleep mode in the following situations even if no key is pressed for 10 minutes If the processing screen calibration screen recall screen or menu screen is displayed If a cable is connected to the external connector any one of the three types Waking the unit from sleep mode Press any key in sleep mode to return to the measurement screen Recalling stored data In the measurement screen frequency weighting characteristic C press the A C CAL key three times to show the recall screen see the state transition diagram on page 10 The most recent processing result is shown Measurement time Elapsed time Address Shows that this Ih Am 0 de is the recall lag 80 130 screen A Level range Un Ov scale nc The bar graph is not shown max 1 1 1 Measurement result appears if no data has been stored Press the START STOP key or the MODE key to change the displayed data as follows appears only when peak range is selected Address 1 Leg gt Lmax
29. stics of connected devices 30 9 2 5 n cables shielded Operating mode or highest radio 9 3 n Operation mode frequency emissions normal operation Connection pattern Maximum and minimum power 9 3 j Maximum 3 6 V supply voltage UU 1 8 Battery types amp battery life Operation from an external 5 2 3 power supply Public power supply voltage 9 2 3 d Environmental electrostatic and radio frequency criteria Time interval for needed to 9 3 1 Temperature change stabilize after environmental lt 1 hour changes Humidity change lt 1 hour Static pressure change lt 5 minutes Degradation of functions by 9 2 7b Measurement value electrostatic discharge affected temporar ily by electrostatic discharge Operating mode with least im 9 3 Fig 5 munity to AC power frequency Operation mode fields and RF fields normal operation Connection pattern 6 Measurement when static pres Calibration and mea N sure is 85 kPa surement performed in this environment using Sound Cali brator NC 74 12 2 2 ote 52 6 1 6 6 4 Field strength for conforming 9 3 m Note in case gt 10 V m 31 331 10 uondnos q 331 10 uondnos q 9 2 1 b Provisions for use with auxiliary devices Correction for use of microphone cable Effect of optional accessories windscreen Statement of conformance with optional accessories wind screen E Fig 4 Influence of
30. ter Description of frequency weight ings that are provided 9 2 1 c 9 2 5 b 9 2 2 c Configuration NL 27 WS 14 Windscreen fall out prevention rubber Silicon cover Attachments Normal mode of operation Power on and off Unit powered UC 52 Power on and off Measurement Calibration N A A C Description of level ranges A weighted SPL 1 kHz Instruction manual of the level range controls and function Recommendation for selecting the optimum level range 9 2 2 h 9 2 5 c 30 dB to 137 dB Menu settings Menu settings 5 1 13 Reference SPL 94 0 dB reference level range 9 3 b Wide range Reference orientation reference c Fig 1 Reference position of microphone incidence direction and reference point position 5 1 14 Operating of the hold facility and Measurement the means for clearing a display Maximum time that is held weighted sound level Eaux C weighted peak sound level 5 1 15 Dummy microphone Design 9 3 g Capacitance of goal and tolerance dummy microphone 19 pF Tolerance 3 pF N A 5 1 16 Highest SPL and Peak Peak 9 3 i input voltage without causing damage 5 1 17 Characteristics of each indepen dent channel to be described 5 1 18 Initial time interval after switch 9 2 5 e ing on power utes Adjustment to indicated levels Model of sound calibrator s 9 2 4a NC 74 RION 5 2 3 Procedure for calibration amp
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