Rion NL-22 Instruction Manual
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Rion NL-22 Instruction Manual

Sound level meter
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INSTRUCTION MANUAL
Sound Level Meter
NL-22 / NL-32
3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
http://www.rion.co.jp/english/

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  • Page 1 INSTRUCTION MANUAL Sound Level Meter NL-22 / NL-32 3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan http://www.rion.co.jp/english/...
  • Page 3 Organization of the NL-22/NL-32 Documentation The documentation for the Sound Level Meter NL-22/NL-32 consists of three separate manuals. Instruction Manual (this document) Describes operating procedures for the Sound Level Meter NL-22/ NL-32, connection and use of peripheral equipment such as a level recorder and printer, and use of the memory card.
  • Page 4 The product described in this manual is in conformity with the following European standards. EN61326:1997 + A1:1998 + A2:2001 + A3:2003 To conform to the EU requirement of the Directive 2002/96/EC on Waste Electrical and Electronic Equipment, the symbol mark on the right is shown on the instrument.
  • Page 5 Organization of This Manual This manual describes the features, operation and other aspects of the Gen- eral-Purpose Sound Level Meter NL-22 and High-Precision Sound Level Meter NL-32. The manual contains the following sections. Outline Gives basic information about the confi guration and features of the unit, and also contains a block diagram.
  • Page 6 Memory Card Explains how to use memory cards with the unit. Default Settings Lists the factory default settings of the unit. Output Connectors Explains the output connectors of the unit. Optional Accessories Explains how to use external equipment for example to store measurement data.

  • Page 7: For Safety

    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 ob- served.
  • Page 8 Precautions Operate the unit only as described in this manual. Protect the unit from shocks and vibration. Be especially careful not to touch the microphone membrane to avoid damage. The membrane is an extremely thin metal fi lm which can be damaged easily. Do not use the unit with a different microphone/preamplifi er from the one indicated on the name plate of the unit.
  • Page 9 Quantifi er Notation of Sound Level Meter NL-22/NL-32 According to International Standards and JIS (Excerpts from ISO 1996, 3891, IEC 61672-1:2002, JIS Z 8202, 8731) NL-22 / 32 Frequency Description notation notation weighting notation notation Sound level FLAT A-weighted sound level...

  • Page 10: Table Of Contents

    Contents FOR SAFETY .................v Outline ....................1 Controls and Functions ..............4 Front View ................4 Operation Keys .................5 Bottom View ................8 Rear View .................9 Preparations .................. 10 Power Supply ................10 Windscreen (WS-10) ...............13 Tripod Mounting ..............13 Memory Card, Program Card ..........14 Microphone Extension Cables (EC-04 series) ......15 Connection to a Printer (DPU-414, CP-11, CP-10) ....
  • Page 11 Maximum (L ) and Minimum (L Sound level Measurement ........60 Percentile Sound level (L ) Measurement .......65 Measurement of Auxiliary Processing Values ) ...... 71 peak Cpeak Atm5 AIeq Back-Erase Function ...............77 Comparator Output ...............79 Store Operations ................81 Manual Store ................83 Auto 1 ..................

  • Page 13: Outline

    Outline The Sound Level Meter NL-22 and NL-32 are designed for sound level mea- surements according to the IEC standard. The following measurements can be made: Equivalent continuous sound level Sound exposure level Maximum sound level Minimum sound level Percentile sound level...
  • Page 14 Outline The following accessories are optional, to cover a wide range of application requirements. Printer DPU-414 Serves to produce hard copy of measurement data (including data stored in memory). Level recorder LR-07/LR-20A Serves to record sound level changes over time.
  • Page 15 KEY SW Start Pause Stop Store Mode Cont DATA BUS A C FLAT Fast Slow ADDRESS BUS Down Range Menu Page Recall Recall data Cal adj Freq Light Print Power PROM RS-232-C POWER SUPPLY CARD INTERFACE NL-22 / NL-32 Block Diagram...

  • Page 16: Controls And Functions

    Recall Recall data Cal adj Freq Light Print NL-22 Power SOUND LEVEL METER Microphone/preamplifi er The microphone and preamplifi er are confi gured as an integrated assembly. The assembly can be removed from the sound level meter and connected via an optional extension cable, for measurements a distance.

  • Page 17: Operation Keys

    Page Recall Recall data Cal adj Freq Light Print NL-22 Power SOUND LEVEL METER Start/Stop key Press to start or stop the sound level measurement (including the various processing functions). Store key Press to start auto store or store measurement data using manual store.
  • Page 18 Controls and Functions Menu key When this key is pressed, the menu screen 1/5 appears on the display. Press- ing the key again switches the display back to the original condition. Menu pages are switched with the Page keys to the right of Down Up the key.
  • Page 19 Controls and Functions Print key When the optional printer DPU-414, CP-11, or CP-10 is connected, press- ing this key initiates a printout. Cal key Pressing this key activates the built-in oscillator for electrical calibration of the unit or for level matching of the unit and connected equipment. Power key Turns the unit on and off when you hold the key down for more than 1 second.

  • Page 20: Bottom View

    Controls and Functions Bottom View AC DC POWER Cover I/O connector AC/DC output jack External power supply 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 optional AC adapter NC-98 series or NC-34 series can be connected here for powering the unit from an AC outlet.

  • Page 21: Rear View

    Controls and Functions Rear View Card compartment Tripod mounting thread Battery compartment Card compartment An optional memory card (CompactFlash™ card) can be inserted here. Tripod mounting thread The unit can be mounted on a camera tripod using this thread. Battery compartment Four batteries (IEC R6P, size AA) are inserted here.

  • Page 22: Preparations

    Preparations Power Supply The unit can be powered by four IEC R6P (size AA) batteries (alkaline or manganese) or by the specifi ed optional AC adapter (NC-98 series or NC-34 series). It is possible to use size AA rechargeable batteries, but a separate recharger must be provided for such batteries, since the unit is not designed to recharge batteries.
  • Page 23 The life of a set of batteries depends on usage conditions and various other factors. Some reference values are shown below. Battery life (23ºC) Continuous use Alkaline batteries Approx. 30 hours NL-22 Manganese batteries R6P Approx. 11 hours Alkaline batteries Approx. 24 hours NL-32 Manganese batteries R6P Approx.
  • Page 24 Preparations AC adapter (option) Connect the AC adapter as shown below. AC DC POWER External power supply jack AC adapter NC-98 series or NC-34 series To AC outlet Important To prevent the risk of damage, do not use any AC adapter other than the NC-98 series or NC- 34 series (both available as options).

  • Page 25: Windscreen (Ws-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. Windscreen WS-10 Tripod Mounting For long-term measurements, the unit can be mounted on a camera tripod.

  • Page 26: Memory Card, Program Card

    Program cards which are memory cards containing software are also optional. By loading the software into the NL-22/NL-32, a 1/1 octave or 1/3 octave band fi lter or a 3rd-order Butterworth high-pass and low-pass fi lter by 1/3- octave step become available.

  • Page 27: Microphone Extension Cables (Ec-04 Series)

    Preparations Important Be sure to turn the unit off before inserting and removing the card from the unit. Microphone Extension Cables (EC-04 series) Turn power to the unit off before separating the microphone from the main unit. To reduce measurement deviations due to refraction effects and the acoustic infl uence of the operator, the microphone can be detached from the unit and connected via an extension cable.
  • Page 28 Preparations 1. Loosen the preamplifi er fastening screw and remove the preamplifi er from the main unit. Microphone Sound level meter main unit Microphone grid Preamplifier Fastening screw Important Never separate the microphone and preampli- fi er, because this can lead to damage. Important (NL-32 only) Never remove the microphone grid, because this can lead to damage.

  • Page 29: Connection To A Printer (Dpu-414, Cp-11, Cp-10)

    Preparations Connection to a Printer (DPU-414, CP-11, CP-10) The I/O port on the bottom of the unit can be used for connection of an optional printer (DPU-414, CP-11, CP-10). Use the optional printer cable CC-93 or CC-93A to connect the I/O port of the unit to the serial input of the printer.
  • Page 30 A printout showing the current status of the printer is produced. An example showing suitable software DIP switch settings for use of the printer with the NL-22/NL-32 is shown below. (The actual printout will be in a different font.) Continue ?
  • Page 31 Preparations Setting the software DIP switches of the CP-11/CP-10 Set the baud rate of the sound level meter to 9600 bps on menu screen 3/5. Set the DIP switches of the printer as follows. DIP switch bank 1 DIP switch bank 2 (8 switches) (8 switches) CP-11...

  • Page 32: Connection To A Level Recorder

    Preparations Connection to a Level Recorder (LR-04, LR-06, LR-07, LR-20A) Sound level recording Connect the AC/DC output on the bottom of the unit to the level recorder, as shown below. AC DC POWER BNC-to-RCA cable CC-24 AC/DC output jack To INPUT connector of level recorder LR-04/LR-06/LR-07/LR-20A The AC/DC output is selected on the menu screen 3/5.

  • Page 33: Setting The Date And Time

    Page Up/Down keys Freq Light Print keys keys NL-22 Power SOUND LEVEL METER The display changes to the menu screen. 3. Use the Page Up/Down keys to bring up the indication 5/5 on the top right of the display. When there is a card in the card slot <Memory>...

  • Page 34: Backup Battery

    The NL-22/NL-32 incorporates a backup battery (rechargeable) for clock data backup. The battery is recharged automatically while power to the NL-22/NL-32 is on. It takes about 12 hours to reach a full charge. With a full charge, data will be retained for about 1.5 months. If this period is exceeded, clock data will be lost.

  • Page 35: Measurement In Dark Locations

    Fast Slow Range Menu Down Page Recall Recall data Cal adj Freq Light Print Light key NL-22 Power SOUND LEVEL METER <I O> LCD Contrast Baud rate 4800 Index Comp. Level Output AC/DC Light Auto Off 5min Light Auto Off...

  • Page 36: Lcd Contrast

    Page Up/Down keys Recall Recall data Cal adj Freq , keys Light Print , keys NL-22 Power SOUND LEVEL METER 2. Use the Page Up/Down keys to switch to menu screen 3/5. <I O> LCD Contrast LCD Contrast Baud rate 4800 Index Comp.

  • Page 37: Calibration

    Preparations Calibration Before starting a measurement, the unit must be calibrated. There are two types of calibration: electrical calibration and acoustic calibration using a pistonphone. Electrical calibration The built-in oscillator (1 kHz, sinusoidal wave) is used for electrical calibra- tion. 1.
  • Page 38 Preparations 6. Use the Cal adj keys to set the level display to 114.0 dB. Frequency weighting is temporarily set to "C". When the Cal key is pressed again, the original settings are restored.
  • Page 39 Preparations Signal output for calibration of external equipment The normal level range for calibration is 30 to 120 dB, but in order to allow calibration of external equipment, calibration can also be performed at other level range settings. In this case, the "XX dB" indication of the calibration value fl ashes.
  • Page 40 Acoustic calibration with sound calibrator NC-74 or pistonphone NC-72A For acoustic calibration, the Rion sound calibrator NC-74 or pistonphone NC-72A is mounted to the microphone of the sound level meter, and adjust- ment is performed so that the reading of the meter is equal to the sound level inside the coupler.
  • Page 41 Preparations 5. Press the Menu key again to return to the measurement screen. 6. Use the Level Range keys to select the 30 to 120 dB range. EXT Cal is shown Set level range to 30 to 120 EXT Cal Level reading Cal screen Frequency weighting...

  • Page 42: Language Selection

    Output sound pressure level imprinted on NC-72A NL-32 94.0 dB 12. Turn off the sound calibrator or the pistonphone and NL-22/NL-32. 13. Remove the microphone very carefully and slowly from the cou- pler. Note For details on operation of the NC-74 or NC-72A, please refer to the instruction manuals for them.

  • Page 43: Reading The Display

    Reading the Display Display screen The illustration below is for demonstration purposes only. In actual use, not all display elements will be visible at the same time, and the size and font of the display may differ. Indicates 100 hours have elapsed For 200 hours, "2"...
  • Page 44 Reading the Display Battery capacity indicator When operating the unit on batteries, periodically check this indicator to determine the remaining battery capacity. The number of black seg- ments decreases as the batteries are used up. When the display starts to fl ash, correct measurement is no longer possible.
  • Page 45 Reading the Display Memory fi eld Shows the selected memory store mode (Manu, Auto 1, or Auto 2). Card insertion indicator This indicator appears when a memory card is inserted. Level range indicator Shows the upper and lower limit of the bar graph. Make the setting that is appropriate for the sound level.
  • Page 46 Reading the Display Frequency weighting indicator Shows the selected frequency weighting setting. FLAT The third and fourth digit are shown when processed values are displayed. The meaning is as follows. Equivalent continuous sound level Sound exposure level : Maximum time-weighted sound level pmax Amax Cmax...
  • Page 47 Reading the Display Recall indicator Lights up when data stored in memory are being displayed. Auto Recall indicator Card Recall Memory address Recall screen Measurement screen examples Auto Card Start Fast Sound level example Auto Card Fast 11/15 12:34:55 Leq : 55.5 L05 : 59.7 : 65.4 L10 : 57.8...
  • Page 48 Reading the Display Menu screens There are fi ve menu screens numbered 1/5 through 5/5. Menu screen 1/5 Meas. time (measurement time) keys to select the measurement time. Manual 10 sec 1 min 5 min 10 min 15 min 30 min 1 hour 8 hours 24 hours...
  • Page 49 Reading the Display When optional fi lter program is installed Filter On/Off When set fi lter to On, one of the following indications appears, depending on the installed fi lter type. Measurement time setting <System> (actual measurement time) Meas. time : 10min Back Erase : Off...
  • Page 50 Reading the Display Cutoff frequency of the high-pass fi lter can be changed with key on the measurement screen. Cutoff frequency of the low-pass fi lter can be changed with key on the measurement screen. Important Auxiliary processing function does not work when set the 1/1 or 1/3 octave band fi lter and universal fi lter to On.
  • Page 51 Reading the Display Menu screen 2/5 <Store> Store Mode Store mode : Manual File name : MAN_1234 File name Menu screen 2/5 Store Mode Manual: Up to 100 data sets (sound level, store time, processing/ auxiliary processing values, processing start time) can be stored.
  • Page 52 Reading the Display Menu screen 3/5 <I O> LCD Contrast LCD Contrast Baud rate Baud rate 4800 Index Index Comp. Level Comp. Level Output AC/DC Output AC / DC Light Auto Off 5min Light Auto Off Menu screen 3/5 LCD Contrast The number of * symbols corresponds to the contrast setting.
  • Page 53 Reading the Display Menu screen 4/5 Leq: Equivalent continuous sound level <Display> Sound exposure level Leq : On : Off Lmax: Maximum : On : Off sound level Lmax: On : On Lmin: Minimum Lmin : On : Off sound level LCpk : Off : Off...
  • Page 54 Reading the Display Note , and L can only be chosen when A Atm5 AIeq weighting is selected for main processing. If C weighting is selected, the L auxiliary processing function does not operate. When not using the auxiliary processing functions, set the display of auxiliary processing values to Off.
  • Page 55 Reading the Display Menu screen 5/5 When there is a card in the card slot When there is no card in the card slot <Memory> <Memory> Card format Manual data clear : <Time setting> <Time setting> Date y / m / d : 2000 / 12 / 25 Date y / m / d : 2000 / 12 / 25 Time : 11 : 22 : 33...
  • Page 56 Reading the Display Manual data clear On/Off This item is shown when there is no card in the card slot. Shown when "Manual <Memory> data clear" is set to "On" Manual data clear : All data clear ? All data clear ? Switching display every 0.5 second Start Cancel...

  • Page 57: Power On/Off

    Start Pause Stop Store Mode Cont A C FLAT Fast Slow Down Range Menu Page Recall Recall data Cal adj Freq Light Print Power key NL-22 Power SOUND LEVEL METER SOUND LEVEL METER NL-22 Ver 0.0 RION CO.,LTD. Power-on screen...
  • Page 58 Power On/Off Power-off Turn the unit off by holding down the Power key for at least one second. When the power-off screen appears, release the Power key. See You Power-off screen Note Wait at least 5 seconds after turning the unit off before you turn it on again.

  • Page 59: Measurement

    1. Turn the unit on by pressing the Power key. After the power-on screen, the measurement screen is shown. The various settings depend on the condition the unit was in before it was last turned off. SOUND LEVEL METER NL-22 RION CO.,LTD. Power-on screen...
  • Page 60 If "L " (Flat) is selected, the sound level from 20 Hz to 12.5 kHz for NL-32 and from 20 Hz to 8 kHz for NL-22 can be measured. When L is selected for display, the sound level from 31.5 Hz to 8 kHz is measured with fl at characteristics.
  • Page 61 Measurement Manu Under-range Fast Over-range signal indicator signal indicator Measurement screen 6. The numeric level indication shows the currently measured sound level. The reading is updated once every second. The Pause/Cont key can be used to stop and start the level reading from being updated.

  • Page 62: Equivalent Continuous Sound Level (L Aeq ) Measurement

    Measurement Equivalent Continuous Sound level (L ) Measurement The procedure for equivalent continuous sound level measurement is de- scribed below. Preparations as described in the previous chapter must be completed fi rst. 1. Turn the unit on by pressing the Power key. 2.
  • Page 63 Note This unit uses high-speed sampling of the sound pressure waveform for L and L processing (NL-22, NL-32: 20.8 µs). The result is therefore unaffected by time weighting and accurate also for a short time period. The auxiliary processing function for equivalent impulse sound level is affected by the time weight- ing.
  • Page 64 Measurement 6. Use the keys to move the cursor to the "Meas. time" item, and use the keys to select the measurement time. Manual 10 sec 1 min 5 min 10 min 15 min 30 min 1 hour 8 hours 24 hours Manual <System>...
  • Page 65 Measurement 10. Press the Start/Stop key to start the measurement. During measurement, the symbol fl ashes and the elapsed measure- ment time is displayed. Measurement time Elapsed measurement time Measurement symbol Manu Pause symbol Start Fast Measurement screen When the measurement time set in step 6 has elapsed, the mea- surement terminates automatically.
  • Page 66 Measurement Manu Fast Data range to be excluded 59.1 Measurement screen 11. When the measurement is completed, you can use the Mode key to switch between various ways of displaying the measurement result. When L is shown, the equivalent continuous sound level is being displayed.

  • Page 67: Sound Exposure Level (Lae ) Measurement

    Measurement Sound Exposure Level (L ) Measurement The procedure for sound exposure level measurement is described below. It is very similar to the measurement of equivalent continuous sound level. Preparations as described in the previous chapter must be completed fi rst. 1.
  • Page 68 Light Print A C FLAT Fast Slow Power key Down Page NL-22 Power SOUND LEVEL METER Note This unit uses high-speed sampling of the sound pres- sure waveform for L and L processing (20.8 µs). The result is therefore unaffected by time weighting and accurate also for a short time period.
  • Page 69 Measurement 7. Use the Page Up/Down keys to display the menu screen 4/5. If L : Off is displayed, use the keys to move the highlight to "Off", and use the keys to set the item to "On". <Display> Leq : On : Off : Set sound exposure : On...
  • Page 70 Measurement When the measurement time set in step 6 has elapsed, the mea- surement terminates automatically. When wishing to terminate the measurement earlier, press the Start/Stop key. If no display (arbitrary measurement time) was selected, the Start/ Stop key must be used to conclude the measurement. If an under-range condition or over-range condition occurs at least once during measurement, the "...
  • Page 71 Measurement 11. When the measurement is completed, you can use the Mode key to switch between various ways of displaying the measurement result. When L is shown, the sound exposure level is being displayed. If L is not shown, check whether L on the "Display"...

  • Page 72: Sound Level Measurement

    Measurement Maximum (L ) and Minimum (L ) Sound level Measurement The procedure for maximum and minimum sound level measurement is described below. Preparations as described in the previous chapter must be completed fi rst. 1. Turn the unit on by pressing the Power key. 2.
  • Page 73 A C FLAT Fast Slow Power key Down Page NL-22 Power SOUND LEVEL METER 5. Use the menu to set the measurement time. Press the Menu key to call up the menu screen 1/5. 6. Use the keys to move the cursor to the "Meas. time" item, and use the keys to select the measurement time.
  • Page 74 Measurement <Display> Leq : On : Off : On : Off Lmax: On : On : Set maximum sound Lmin : On : Off level display to "On". LCpk : Off : Off LIST : On T-L : On : Set minimum sound Menu screen 4/5 level display to "On".
  • Page 75 Measurement If an under-range condition or over-range condition occurs at least once during measurement, the " " (Over) or " " (Under) indi- cator appears, to show that the processing data contain over-range or under-range data. Important During measurement, most of the keys such as the A/C/FLAT key and Level keys are in- operative.
  • Page 76 Measurement 11. When the measurement is completed, you can use the Mode key to switch between various ways of displaying the measurement result. When L is shown, the maximum sound level is being dis- Amax played. When L is shown, the minimum sound level is being Amin displayed.

  • Page 77: Percentile Sound Level

    Measurement Percentile Sound level (L ) Measurement The procedure for percentile sound level measurement is described below. It is very similar to the measurement of equivalent continuous sound level. Preparations as described in the previous chapter must be completed fi rst. 1.
  • Page 78 A C FLAT Fast Slow Power key Down Page NL-22 Power SOUND LEVEL METER 5. Use the menu to set the measurement time. Press the Menu key to call up the menu screen 1/5. 6. Use the keys to move the cursor to the "Meas. time" item, and use the keys to select the measurement time.
  • Page 79 Measurement 7. Use the Page Up/Down keys to display the menu screen 4/5. 8. In the default condition, the unit is set up to measure the percentile sound level L , and L . These settings can be changed to any value between L and L (up to fi ve settings).
  • Page 80 Measurement 11. Press the Start/Stop key to start the measurement. During measurement, the symbol fl ashes and the elapsed measure- ment time is displayed. Measurement time Elapsed measurement time Measurement symbol Manu Pause symbol Start Fast Measurement screen When the measurement time set in step 6 has elapsed, the mea- surement terminates automatically.
  • Page 81 Measurement During measurement, the Pause/Cont key can be used to pause and resume the measurement. During pause, the pause symbol ( ) is shown. (Any pause intervals and the back-erase time if data back- erase is enabled are not included in the measurement time.) If data back-erase was enabled in step 9, the data are indicated on the display, as shown below.
  • Page 82 Measurement If " " (Over) is shown, the sound level data used for processing contained over-range data. If " " (Under) is shown, the sound level data used for processing contained under-range data. Manu Under-range signal indicator Over-range Fast signal indicator Percentile sound level Measurement screen Note...

  • Page 83: Measurement Of Auxiliary Processing Values

    Measurement Measurement of Auxiliary Processing Values (L peak Cpeak Atm5 AIeq This unit can simultaneously measure L plus one of the items listed below. : FLAT peak sound level peak : C-weighted peak sound level Cpeak : C-weighted equivalent continuous sound level : Takt-max sound level Atm5 : Impulse sound level...
  • Page 84 Measurement Important Auxiliary processing functions cannot be used in conjunction with the optional fi lters (octave band fi lter, universal fi lter). The auxiliary pro- cessing functions are disabled when the 1/1, 1/3 octave band fi lter or universal fi lter is On. Set the display of auxiliary processing values to Off, using the display menu screen (4/5).
  • Page 85 Measurement <Display> : Peak sound level peak Leq : On : Off : On : Off : C-weighted peak sound level Cpeak Lmax: On : On : C-weighted equivalent continuous Lmin : On : Off LCpk : On : Off sound level LIST : On T-L : On...
  • Page 86 Measurement 6. Press the Menu key to return to the measurement screen. 7. Use the Level Range keys to select the level range. Choose a setting in which the bar graph indication registers to about the middle of the range. If the "...
  • Page 87 Level range 90 dB 100 dB 110 dB 120 dB 130 dB 80 dB Measurement upper limit (dB) C weighting Measurement lower limit (dB) Measurement upper limit (dB) Flat Measurement lower limit (dB) NL-22/NL-32 peak measurement range...
  • Page 88 Measurement Important is the time weighting level, but the display is updated when processing is started by press- ing the Start key. When processing stops, the display update also stops. To measure L only, setting of the "Meas. time" item to "Manual" is recommended.

  • Page 89: Back-Erase Function

    Measurement 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 (i.e. to exclude data from the point at which the key has been pressed), but it is also possible to exclude (back-erase) data from an interval of 5 seconds before the key was pressed.
  • Page 90 Measurement Note When L , is selected as auxiliary processing func- Atm5 tion, the data exclusion function cannot be used. The function also cannot be used during Auto 1 store or Auto 2 store.

  • Page 91: Comparator Output

    Comparator Output This unit provides a comparator output that is activated when the measured sound level exceeds a preset threshold. The output is an open collector type. To use the comparator output signal, the CC-94 cable is required. Set the comparator threshold level with the "Comp. Level" item on menu screen 3/5.
  • Page 92 Comparator Output The I/O connector specifi cations are shown below. When the setting value has not been reached (comparator "Off"), the col- lector pin is open. When the setting value has been reached (comparator "On"), the collector pin is at ground potential. This condition is maintained for at least one second. Note Comparator operation is based on the sound level sampled at 100 ms intervals.

  • Page 93: Store Operations

    Store Operations The NL-22/NL-32 incorporates a memory which can be used to store mea- surement data (sound level, L and other processed values, measurement parameters such as frequency weighting, time weighting, etc.). This chapter describes how to store data in memory and how to recall data from memory.
  • Page 94 Store Operations Important Never turn off the unit or remove the memory card while a store operation is in progress. Oth- erwise internal data can be destroyed. While a memory card is inserted in the card slot, the internal memory cannot be accessed, which means that data cannot be stored in the memory or read or printed from the memory.

  • Page 95: Manual Store

    Store Operations Manual Store Storing Data in Memory At the point where you press the Store key, the current sound level and all processed values are saved. Immediately after turning the unit on, no pro- cessing results exist. Therefore only the sound level gets stored. If no memory card is inserted, data are stored in the internal memory.
  • Page 96 Store Operations 3. Press the Menu key to call up the menu screen. 4. Use the Page Up/Down keys to display the menu screen 2/5. 5. If the Store Mode item is not set to "Manual", use the keys to move the highlight to the item and use the keys to set it to "Manual".
  • Page 97 Store Operations 9. To store processed values, perform the measurement as described in the preceding chapter (except for "Sound level Measurement"). 10. Select the data number for the store process. The data number is shown on the screen. You can use the keys to set the data number to a value be- tween 1 to 100.
  • Page 98 Store Operations 11. Press the Store key. The sound level at point when the key was pressed is stored. If processing measurement was carried out in step 9, the processed data are also stored in the same way. The store process is completed in about one second, and the data number is incremented by 1.
  • Page 99 Store Operations Reading Stored Data (From Internal Memory) To read data stored in the internal memory with manual mode, proceed as follows. Important When the memory card is inserted in the card slot, the data stored in the internal memory can- not be read.
  • Page 100 Store Operations Reading Stored Data (From Memory Card) To read data stored in the memory card with manual mode, proceed as fol- lows. Verify that the memory card is inserted in the card slot. 1. Turn the unit on. 2. Press the Recall key to bring up the card recall screen. The data are sorted by measurement start time, in descending order.
  • Page 101 Store Operations Clearing Stored Data (From Internal Memory) To clear data stored in the internal memory with manual mode, proceed as follows. 1. Verify that no memory card is inserted in the card slot. 2. Press the Menu key to call up the menu screen. 3.
  • Page 102 Store Operations Clearing Stored Data (From Memory Card) To clear data stored in the memory card with manual mode, proceed as fol- lows. 1. Verify that the memory card is inserted in the card slot. 2. Press the Menu key to call up the menu screen. 3.

  • Page 103: Auto 1

    Page Recall Recall data Cal adj Recall key Freq Recall Data keys Light Print Power key NL-22 Power SOUND LEVEL METER <Store> Store mode : Auto 2 Leq Store mode File name : AU2_1234 File name (4-digit number) Menu screen 2/5...
  • Page 104 Store Operations 7. Use the "Auto 1 Samp." item to set the sampling interval for the sound level or equivalent continuous sound level. Use the key to move the highlight, and use the keys to select the setting. For sound level measurement, you can select 100 ms, 200 ms, or 1 s.
  • Page 105 Store Operations 13. Press the Store key. For normal Auto 1 store, Start lights up for 1 second, and the Store indication fl ash to indicate that store is being carried out. The elapsed time is also shown. In timer mode, the Auto 1 standby screen as shown below is displayed, and the unit goes into power save mode.
  • Page 106 Store Operations Important During store operation, most of the keys such as the A/C/FLAT key and Fast/Slow key are inoperative. Only the following fi ve keys can be used: Start/Stop, Pause/Cont, Mode, Light, Store. All other settings must be made before starting the store operation.
  • Page 107 Store Operations 15. The timer mode measurement has completed normally, the indication below is shown. T i m e r m o d e m e a s u r e - m e n t i s c o m p l e t e d P u s h a n y K e y During Auto 1 store, the store address is converted into elapsed time for display.
  • Page 108 Store Operations Reading Stored Data To read data stored in Auto 1 mode, proceed as follows. Verify that the memory card is inserted in the card slot. 1. Turn the unit on. 2. Press the Recall key to bring up the card recall screen. The data are sorted by measurement start time, in descending order.

  • Page 109: Auto 2

    Page Recall Recall data Cal adj Recall key Freq Recall Data keys Light Print Power key NL-22 Power SOUND LEVEL METER <Store> Store mode : Auto 2 Leq Store mode File name : AU2_1234 File name (4-digit number) Menu screen 2/5...
  • Page 110 Store Operations 5. Use the key to select "File name". 6. Specify the last four digits of "AU 2_0000" with the keys to set the fi le name. For normal Auto 2 store without using the timer mode, proceed to step 11.
  • Page 111 Store Operations 9. Use the Page Up/Down keys to display the menu screen 1/5. Use the keys to move the cursor to the "Meas. time" item, and use the keys to select the measurement time. Manual 10 sec 1 min 5 min 10 min 15 min...
  • Page 112 Store Operations Normal Auto 2 store Start lights up for 1 second, and the Store indication fl ash to indicate that store is being carried out. The elapsed time (time that 1 data set has been measured) is also shown. The address always starts from 1.
  • Page 113 Store Operations When Timer Auto 2 is used The Auto 2 standby screen as shown below is displayed, and the unit goes into power save mode. Auto Auto 2 Store Standby File name : AU2_0123 M.Time : 1min Start : 01/02 10:00:00 Stop : 01/04...
  • Page 114 Store Operations 17. The timer mode measurement has completed normally, the indication below is shown. T i m e r m o d e m e a s u r e - m e n t i s c o m p l e t e d P u s h a n y K e y...
  • Page 115 Store Operations Reading Stored Data To read data stored in Auto 2 mode, proceed as follows. Verify that the memory card is inserted in the card slot. 1. Turn the unit on. 2. Press the Recall key to bring up the card recall screen. The data are sorted by measurement start time, in descending order.
  • Page 116 Store Operations Note When auxiliary processing item L is selected for Auto 2 store data. For L the level value at the moment when the measurement time has elapsed and data are entered in the respective address is stored. Timer operation example Because the timer of this unit does not allow setting the year, a setting such as shown below will result in measurement end after about a year.

  • Page 117: Memory Card

    Memory Card Memory Card Using a memory card Open the card compartment and insert the memory card. To remove the card, push the lever in. Lightly press here and slide to the right Connector section Lever Insert card with correct orientation Important Be sure to turn the unit off, before inserting and...

  • Page 118: Data Size

    Memory Card Data size The necessary data size for Auto 1 store Data size ( MByte ) Measurement time 100 ms 200 ms 1 hour 0.05 8 hours 24 hours (1 day) 11.5 3 days 34.6 17.3 7 days 80.8 40.4 Manual 96.1...
  • Page 119 Some memory cards differ in specifi cations even if they are the same type from the same manufacturer. Correct function therefore is not assured if us- ing other cards except those optional from Rion. Be sure to use only Rion cards.

  • Page 120: Store Data Format

    Memory Card Store Data Format Data stored on the memory card are in CSV format. The fi les on the card are stored in different subdirectories which are created automatically. Manual store The fi le name entered via the menu screen is used for the last 4 characters of the subdirectory name.
  • Page 121 Memory Card Center/High pass filter cutoff, Low Pass filter cutoff, Frequency weight, Time-weight, Filter, Center Hi- Low Pass Address, Freq Store time, Lp, Over, Under, Fast, 1/1 oct, 41.7, Under, 1 kHz, 2001/2/25 12:00, Fast, 1/1 oct, 2001/2/25 12:05, 45.8, Under, Fast, 1/1 oct,...
  • Page 122 Memory Card Auto 1 store The fi le name entered via the menu screen is used for the last 4 characters of the subdirectory name and the header fi le name. \AU1_2345 File name entered via menu becomes subdirectory name AU1-2345.
  • Page 123 Memory Card The header fi le contains measurement parameters and other information. The data fi le contains the sound pressure level, over-range information ("O"), under-range information ("U"), and pause information ("P") in CSV format. Line returns are <CR><LF>. One fi le contains up to 60,000 data. When this number is exceeded, a new fi le is created.
  • Page 124 Memory Card Auto 2 store The fi le name entered via the menu screen is used for the last 4 characters of the subdirectory name and the header fi le name. \AU2_3456 File name entered via menu becomes subdirectory name AU2-3456.

  • Page 125: Default Settings

    Default Settings The factory default settings of the unit are listed below. Fast/Slow (time weighting) Fast A/C/FLAT (frequency weighting) Level Range 30 to 120 Mode Store Mode Manual Meas. Time 10 min Auto 1 100 ms Timer mode Back Erase LCD Contrast ***** - - I/O Baud Rate...

  • Page 126: Output Connectors

    Output Connectors AC Output An AC signal corresponding to the frequency-weighted signal is output. When the optional fi lter is installed, the output signal corresponds to the signal routed through the fi lter. Output voltage: 1 Vrms ±50 mV rms (scale upper limit) Output impedance: approx.

  • Page 127: Dc Output

    Output Connectors DC Output A level-converted DC signal generated by rms detection and logarithmic compression is output. The signal refl ects the frequency weighting and time weighting settings of the unit. Output voltage: 2.5 V ±50 mV (scale upper limit), 0.25 V / 10 dB Output impedance: approx.

  • Page 128: I/O Connector

    Output Connectors I/O Connector This input/output connector serves for input of control signals, input/output of measurement data and comparator output. The following types of cable can be connected. • Printer cable: CC-93 (for DPU-414) CC-93A (For CP-10, CP-11) Data output to the printer DPU-414, CP-10, CP-11 •...

  • Page 129: Optional Accessories

    Optional Accessories Microphone Extension Cables EC-04 Series For measurements requiring special precision, the microphone can be removed from the main unit and connected by means of an extension cable. This reduces measurement deviations due to refraction effects and the acoustic infl uence of the operator.

  • Page 130: Printer Dpu-414/Cp-11/Cp-10

    The procedure for printing is described below. Before starting, connect the printer to the NL-22/NL-32, turn both units on, and set the printer to the on- line condition. Preparations as described in the chapter "Preparations" (page 10) should also be completed.
  • Page 131 Optional Accessories 3. Press the Print key. Sample printout Sample printout Actual font and size will be different. Printing out data during a measurement (sound level) A hard copy of the screen is printed out. Manu Fast Sample printout...
  • Page 132 Optional Accessories Printing out data stored with manual mode in the internal memory The following explanation assumes that data have been stored in the memory of the unit. For an explanation of the store process, see the section "Store Operations". To print out the data, proceed as follows.
  • Page 133 Optional Accessories 4. Press the Print key. The printout contents will vary, depending on the contents (sound level value or processed values) shown on the display. When processed values are displayed Example Sample printout 5. To terminate the recall mode, press the Recall key again.
  • Page 134 Optional Accessories Printing out data stored with Auto 1 mode in the optional memory card Note When carrying out Auto 1 and Auto 2 mode, the data cannot be stored in the internal memory. The following explanation assumes that data have been stored in the optional memory card.
  • Page 135 Optional Accessories 7. Press the Print key. 100 data sets, starting with the selected data, will be printed out. Example Sample printout If the following conditions have occurred, the alphabet or the mark as shown below is printed after the sound level. Over: Under: Pause:...
  • Page 136 Optional Accessories Printing out data stored with Auto 2 mode in the optional memory card The following explanation assumes that data have been stored in the optional memory card. For an explanation of the store process, see the section "Store Operations".
  • Page 137 Optional Accessories 6. Use the keys to select the data for printout. Data No. Auto Card 01 29 14:25:30 Fast Recall screen (Auto 2) 7. Press the Print key. Example Auxiliary processing value (It is not printed out when Off is chosen.) Sample printout When the Print key is pressed for the fi rst time, 50 data sets starting from the selected data number are printed out.

  • Page 138: Level Recorder Lr-04/Lr-06/Lr-07/Lr-20A

    Sound level recording The procedure for noise level recording on a level recorder is described below. Before starting, connect the level recorder to the NL-22/NL-32 and turn power on. Preparations as described in the chapter "Preparations" (page 10) must also be completed. For details regarding use of the level recorder, please refer to its documentation.
  • Page 139 9. Use the Level Range keys to select the level range. Choose a setting in which the "Over" or "Under" indication does not appear. The upper limit of the level range selected at the NL-22/NL-32 be- comes the full-scale point of the level recorder.

  • Page 140: Program Cards

    Optional Accessories Program Cards This section describes how to use the NX-21SA and NX-21VA. For informa- tion on how to use other program cards, please refer to the documentation of the respective card. 1. Verify that power to the unit is turned off. 2.
  • Page 141 Optional Accessories 1/1, 1/3 octave fi lter program card NX-21SA Linearity range during fi lter operation is 65 dB. Supported standard: IEC 61260:1995 Class 1 1/1 octave band fi lter 16 Hz to 8 kHz 1/3 octave band fi lter 12.5 Hz to 16 kHz Select the "Filter"...
  • Page 142 Freq Freq key Light Print Power key NL-22 Power SOUND LEVEL METER 3rd-order Butterworth high-pass fi lter and 3rd-order Butterworth low-pass fi lter with freely selectable frequency in 1/3 octave steps Linearity range during fi lter operation is 65 dB.
  • Page 143 Cal adj Freq Freq key Light Print Power key NL-22 Power SOUND LEVEL METER Important If the optional fi lter is set to "On", auxiliary pro- cessing cannot be used. The auxiliary process- ing value will be 00.0 dB even if the function is set to "On".

  • Page 144: Messages

    Messages This chapter explains various messages that may be displayed by the unit during operation. Any steps that should be taken are also explained. English Deutsch Español File open error Can not open fi le Datei kann nicht No se puede abrir or memory full! geöffnet werden! archivo o lleno.
  • Page 145 Messages Card read error Error in reading Lesefehler Error de lectura from card! von Karte! en tarjeta! Push any key. Taste drücken. Presione un botón. Data read was attempted, but card was removed. <User action> Do not remove card during read or write access. Card write error Error in writing Schreibfehler...
  • Page 146 Messages No recall data No recall data! Keine gespeicherte No hay datos Daten vorhanden! que recuperer. Push any key. Taste drücken. Presione un botón. There are no data stored on the memory card. Recall data are being checked Checking card… Karte wird Está...
  • Page 147 Messages Data number 100 reached during manual store (internal memory) Data count has Datennummer Contador de datos reached 100. 100 erreicht. ha llegado a no 100 Change Data Number. Datennummer ändern. Cambiar no de dato. Push any key. Taste drücken. Presione un botón.
  • Page 148 Messages Timer mode setting error Reset interval time Intervalldauer oder Resetear intervalo or measurement time. Meßdauer neu de tiempo. eingeben. Settings are Ajuste de intervalo inconsistent. inconsistente. Push any key. Taste drücken. Presione un botón. Measurement time is longer than interval time for timer mode. <User action>...

  • Page 149: Specifi Cations

    Specifi cations Applicable standards Sound Level Meter NL-22 IEC 61672-1:2002 Class 2 JIS C 1509-1:2005 Class 2 IEC 60651 and IEC 60804 was withdrawn and replaced by IEC 61672-1. JIS C 1502 was withdrawn and replaced by JIS C 1509-1.
  • Page 150 38 dB to 138 dB C-weighted peak sound level: 55 dB to 141 dB Peak sound level (FLAT): 60 dB to 141 dB Inherent Noise NL-22 NL-32 A weighting: 22 dB or less 20 dB or less (Typ. 19 dB) (Typ.
  • Page 151 Specifi cations Level range selection 6 ranges in 10-dB steps 20 to 80 dB 20 to 90 dB 20 to 100 dB 20 to 110 dB 30 to 120 dB 40 to 130 dB When operating using the program data from the 1/1, 1/3 Octave Real- Time Analysis Card NX-22RT or FFT Analysis Card NX-22FT, the following seven ranges in 10-dB steps are available.
  • Page 152 Specifi cations Frequency range Overall characteristics including microphone: NL-22: 20 to 8000 Hz NL-32: 20 to 20000 Hz Electrical circuit characteristics (AC output): NL-22: 10 to 20000 Hz NL-32: 10 to 20000 Hz Electrical circuit characteristics (detector): NL-22: 10 to 20000 Hz...
  • Page 153 Serves to set start and end time for auto store 2 measure- ment. Pause interval between measurements can also be set. During the pause interval, the unit operates in power save mode (power consumption approx. 1/3). Microphone 1/2-inch prepolarized condenser type NL-22 NL-32 Model: UC-52 UC-53A Sensitivity:...
  • Page 154 Specifi cations Outputs AC/DC output Key-selectable AC or DC output AC output (using selected frequency weighting and fi lter settings) Output voltage: 1 Vrms (at full-scale) Output impedance: 600 Ω Load impedance: 10 kΩ or more DC output Output voltage: 2.5 V (at full-scale), 0.25 V/10 dB Output impedance: 50 Ω...
  • Page 155 Specifi cations Power requirements Four IEC R6P (size "AA") batteries Battery life (23°C) NL-22: Approx. 30 h (alkaline batteries), Approx. 11 h (manganese batteries) NL-32: Approx. 24 h (alkaline batteries), Approx. 10 h (manganese batteries) With backlighting, battery life is reduced to about half.
  • Page 156 CC-93 (9 pins, for DPU-414) CC-93A (25 pins, for CP-10, CP-11) Printer DPU-414 Sound calibrator NC-74 Pistonphone NC-72A Level recorder LR-07/LR-20A Comparator output cable CC-94 Windscreen WS-03E Battery pack BP-21 Dry-cell batteries (IEC-R20, size "D") × 4 NL-22 management software NL-22PA1...
  • Page 157 Specifi cations Optional program card specifi cations The program card is a CompactFlash card which contains program data. After these program data have been read off the card by the sound level meter during the software installation process, the new function can be used.
  • Page 158 A C FLAT Fast Slow Menu Down Page Range Recall Recall data Cal adj Freq Light Print Power NL-22 SOUND LEVEL METER Rear View Side View Front View AC DC POWER Bottom View Unit: mm Dimensional Drawings (Illustration shows NL-22)
  • Page 160 No. 33625 09-06...

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