| Applicable standards |
| NL-43 |
IEC 61672-1:2013 class 2
ANSI/ASA S1.4-2014/Part 1 class 2
JIS C 1509-1:2017 class 2
JIS C 1516:2020 class 2 |
| NL-53 |
IEC 61672-1:2013 class 1
ANSI/ASA S1.4-2014/Part 1 class 1
JIS C 1509-1:2017 class 1
JIS C 1516:2020 class 1 |
| NL-43/NL-53 common |
CE Marking
・EMC Directive Directive 2014/30/EU EN 61326-1:2013
・RoHS Directive Directive 2011/65/EU EN IEC 63000:2018
・Low Voltage Directive Directive 2014/35/EU EN 61010-1:2010/A1:2019
UKCA Marking, China RoHS, KC mark, VCCI Class B |
|
| Measurement function |
Simultaneous measurement of up to four channels (Main channel, Sub1 to Sub3 channels) with selected time weighting and frequency weighting
| Instantaneous value |
Time-weighted sound level Lp |
| Calculated value |
Equivalent continuous sound level Leq
I-time-weighted equivalent continuous sound level LIeq
Moving Leq Leq,mov
Sound exposure level LE
Maximum sound level Lmax
Minimum sound level Lmin
Percentile sound level LN
Peak sound level Lpeak
Takt-max sound level Ltm5 |
|
| Measurement time |
| Manual store |
10 s, 1 m, 5 m, 10 m, 15 m, 30 m, 1 h, 8 h, 24 h, User Setting (1 s to 24 h) |
Auto store
|
10 s, 1 m, 5 m, 10 m, 15 m, 30 m, 1 h, 8 h, 24 h, User Setting (Min. 1 s to max 1,000 h), Continue (Perform measurements until the SD card runs out of space) |
|
| Microphone and preamplifier |
| |
NL-43 |
NL-53 |
| Microphone |
UC-52 |
UC-59 |
Sensitivity level
(representative value) |
-33 dB (re.1 V/Pa at 1 kHz) |
-27 dB (re.1 V/Pa at 1 kHz) |
| Preamplifier |
NH-24 |
NH-25 |
|
| Measurement level range |
| A-weighting |
25 dB to 138 dB |
| C-weighting |
33 dB to 138 dB |
| Z-weighting |
38 dB to 138 dB |
| C-weighted peak sound level |
55 dB to 141 dB |
| Z-weighted peak sound level |
60 dB to 141 dB |
|
| Self-generated noise |
|
NL-43 |
NL-53 |
| A-weighting |
19 dB or less (Typical 17 dB) |
17 dB or less (Typical 15 dB) |
| C-weighting |
27 dB or less (Typical 25 dB) |
25 dB or less (Typical 23 dB) |
| Z-weighting |
32 dB or less (Typical 30 dB) |
30 dB or less (Typical 28 dB) |
|
| Entire linear operating range |
25 dB to 138 dB |
| Linear operating range |
113 dB |
| Measurement frequency range |
| NL-43 |
20 Hz to 8 kHz |
| NL-53 |
10 Hz to 20 kHz |
|
| Standard frequency |
1 kHz |
| Reference sound pressure level |
94 dB |
| Frequency weighting |
A-weighting, C-weighting and Z-weighting |
| Time weighting |
F (Fast), S (Slow),
I (Impulse) |
| Input range |
Automatic switching |
| Bar graph display |
| Upper range |
70 dB to 130 dB can be set in 10 dB increments |
| Lower range |
20 dB to 60 dB can be set in 10 dB increments |
|
| Sampling interval |
Lp, Leq, LE, Lmax,
Lmin, Lpeak, LIeq |
20.8 µs (sampling frequency 48 kHz) |
| LN |
Lp : 100 ms
Leq : 1 s |
| Leq,mov |
Leq : 1 s
|
| Ltm5 |
Lmax : 5 s |
|
| Calibration |
A reference signal is input using sound calibrator NC-75/NC-74 or pistonphone NC-72B/NC-72A, and the signal input sensitivity is adjusted.
Up to 30 calibrations can be managed in the calibration history, and saved to an SD card
|
NC-75/NC-74 |
NC-72B/NC-72A |
| Nominal frequency |
1 kHz |
250 Hz |
| Nominal sound level |
94 dB |
Refer to the instruction manuals of NC-72B/72A respectively |
|
| Reference signal output to external devices |
| Frequency |
1 kHz |
| Output level |
Bar graph upper limit - 6 dB |
|
| Correction function |
Windscreen correction function
(WS-10, WS-15, WS-16) |
Corrects the influence on the frequency response when the windscreen is installed. |
Diffuse sound field
correction function |
Corrects the influence on the frequency response when used in a diffuse sound field. |
|
| Delay time |
After the operation to start measuring, the device starts measuring after the specified time elapses
| Setting time |
Off, 1 s, 3 s, 5 s, 10 s |
|
| Trigger mode |
| Level trigger |
Measurement starts when the specified channel exceeds the specified level.
Generate a stop trigger after the total measurement time has elapsed.
Trigger channel: Main, Sub, Sub2, Sub3
Trigger level: Can be set from 30 dB to 130 dB in 1 dB increments. |
| Timer Auto |
Generate a start trigger and stop trigger at specified times.
When storing Leq, it is possible to specify the interval for generating start triggers.
The device enters sleep mode in the measurement stop state, reducing power consumption. |
| External trigger |
Generate a start trigger in response to a short between the terminals of the dedicated cable CC-43CT, and generate a stop trigger after the total measurement time has elapsed. |
|
| Back erase function |
Excludes, from the calculation, data from the specified time before using this function
| Setting time |
Off, 1 s, 3 s, 5 s |
|
| Display |
| Device |
3.5 inch TFT-LCD (with touch panel functionality) |
| Touch panel |
Resistive film method (pressure-sensitive) |
| Screen size |
QVGA (320 x 240) |
| Backlight |
Light Off, Brightness can be set 1-4 |
Time-Level graph/
bar graph update cycle |
100 ms |
| Numeric value update cycle |
1 s |
|
| Key lock |
Touch panel and key input can be locked to prevent operation
User name (up to 12 characters) and password (4 digits) can be set to unlock the device |
| Languages |
Japanese, English, German, Spanish, French, Chinese, Korean |
| Overload indication / Under-range indication |
Notifies under the following conditions for each measurement channel:
・OVER is displayed for a signal input that is larger than the upper measurement limit
・UNDER is displayed for a signal input that is smaller than the lower measurement limit
・OUTPUT OVER is displayed for a signal output that is larger than the output level range |
| Manual store |
Data per address is saved to internal memory or SD card
・Calculated values Leq, LE, Lmax, Lmin, Lpeak, LN, Ltm5 and LIeq are saved
・Lp data can also be saved when the device is paused.
| Data storage capacity |
Internal memory: Data of up to 1,000 addresses can be stored
SD card: Data an be saved with store names from 0000 to 9999
(up to 1,000 addresses for each store) |
|
Auto store
(Lp store)
|
Lp data is continuously saved to the SD card at the interval set in Lp Store Interval. Calculated values Leq, Lmax, Lmin, Lpeak and LIeq are also calculated at the same time and saved continuously on the SD card.
| Lp store interval |
Off, 10 ms, 25 ms, 100 ms, 200 ms, 1 s |
| File splitting interval |
1 hour |
| Data storage capacity |
SD card: Data can be saved with store names from 0000 to 9999 |
|
Auto store
(Leq store)
|
Simultaneously calculate Leq, Leq,mov, LE, Lmax, Lmin, Lpeak, LN, Ltm5 and LIeq at the interval specified in [Leq Calc.Interval] before recording the results continuously on the SD card.
| Leq calculation interval |
Off, 10 s, 1 m, 5 m, 10 m, 15 m, 30 m, 1 h, 8 h, 24 h, or User Setting (Min. 1 s to max. 24 h) |
| File splitting interval |
60,000 stores |
| Data storage capacity |
SD card: Data can be saved with store names from 0001 to 1000 |
|
| Data format |
CSV file (a text file in which information is separated by commas) |
| Screenshot |
Saving screen display contents in BMP format |
| Data recall |
Browses stored data and screenshot images |
| Memorizing and recalling settings |
Setting information can be saved to the internal memory or SD card and recalled at startup or at a specified time |
| SD card formatting |
Initializes the contents of the SD card to free up space so that you can use it |
| Output |
| AC output |
Output voltage: 1 Vrms at the output level range
Output resistance: 50 Ω
Load impedance: 10 kΩ or more |
| DC output |
Output voltage: 2.5 V, 25 mV/dB at the output level range
Output resistance: 50 Ω
Load impedance: 10 kΩ or more |
| DC/AC simultaneous output |
Enables simultaneous output of DC output and AC output |
|
| Output range |
Can be linked to the bar graph upper limit, or set from 70 dB to 130 dB in 10 dB increments |
Comparator
|
The comparator output turns on when the specified channel exceeds the set level |
Communication/
RS-232C |
| Communication |
Measurement values can be acquired and settings can be changed by using communication commands |
| Print |
Printing is possible using the dedicated printer DPU-414 or BL2-58.
Prints the measurement screen or saved data screen |
| Baud rate |
9600 bps, 19200 bps, 38400 bps, 57600 bps, 115200 bps |
|
| USB |
| Communication |
Measurement values can be acquired and settings can be changed by using communication commands |
| Data transfer |
Enables the transferring of data by making the computer recognize the SD card as a removable disk |
|
LAN
|
| Communication |
Measurement values can be acquired and settings can be changed by using communication commands |
| Data transfer |
Data on an SD card can be transferred to a computer |
| Web browser display |
Via a web browser, settings can be changed and measured values displayed. Via Google Chrome on PC, audio can be played. |
|
| Power supply |
4 × AA batteries, power supply to DC jack and USB port
Operating time
(at 23℃, ECO setting) |
Alkaline battery LR6:
Approx. 12 hours(Manual store, Eco setting ON)
Approx. 16 hours (Auto store, Eco setting ON, with NX-43EX installed)*
Ni-MH rechargeable battery HR6:
Approx. 12 hours(Manual store, Eco setting ON)
Approx. 16 hours (Auto store, Eco setting ON, with NX-43EX installed)*
Mobile battery: Approx. 24 hours of power at 5,000 mAh
* Measurement conditions:Leq calculation interval 10 minutes (Lp
store OFF) |
| AC adapter |
NE-21P
(Input: 100 V to 240 V AC, 50/60 Hz, Output: 12 V DC) |
| External power supply voltage |
5.7 V to 15 V (rated voltage 12 V)
USB port: 5 V |
| Primary side (100 V side) power consumption |
Approx. 3 W |
|
| Operating temperature and humidity range |
| Temperature |
-10℃ to 50℃ |
| Humidity |
10% to 90% RH (no condensation) |
|
| Dustproof and waterproof performance |
| IP rating |
IP54 (excluding microphone) |
|
| Dimensions, weight |
Approx. 258 mm (H) x 83.5 mm (W) x 34.5 mm (D), approx. 400 g (including batteries) |
| Accessories |
Carrying case ×1
Model name label (For attaching the carrying case) ×2
Windscreen WS-10 ×1
Windscreen fall prevention rubber ×1
Hand strap ×1
Size AA alkaline batteries ×4
512MB SD Card ×1
Instruction Manual: Quick Start Guide ×1
Supplied Accessories & Inspection Certificate ×1 |
| Optional accessories |
Optional programs
Waveform Recording Program NX-43WR
Octave∙1/3 Octave Real-time Analysis Program NX-63RT
FFT Analysis Program NX-43FT
512MB SD Card
2GB SD Card
32GB SD Card
AC adapter (100 V to 240 V AC) NE-21P
Battery pack (Using four D alkaline batteries) BP-21A
Microphone extension cable EC-04 series
All-Weather Windscreen WS-15
Rain-protection Windscreen WS-16
BNC pin output cable CC-24/CC-24S
Printer cable CC-42P
RS-232C serial I/O cable CC-42R
Comparator Output / Trigger Input Cable CC-43CT
AC/DC Output Splitter Cable CC-43S
DC Polarity Converter CC-43J
Data Management Software for Environmental Measurement AS-60
Data Management Software for Environmental Measurement
(Includes the Octave and 1/3 Octave Data Management Software) AS-60RT
Waveform Analysis Software AS-70
Sound calibrator NC-75
Pistonphone NC-72B
Tripod for sound level meter ST-80
Tripod for All-Weather Windscreen ST-91
4 channel Data Recorder DA-21
Level recorder LR-07
Dedicated soft case
Rubber cover for external power use |
