model

NL-62

Standards adopted

IEC 61672-1：2002 Class 1
ANSI S1.4-1983 Type 1
ANSI S1.4-1985 Type 1
ANSI S1.43-1997 Type 1
JIS C 1509-1：2005 Class 1

Measurement function

Processing (Main Channel)

Processing (secondary channel)
Additional processing

Measure the following items simultaneously using the selected time weighting and frequency weighting

Instantaneous sound pressure level: Lp
Equivalent continuous sound pressure level: Leq
Exposure Sound Level: LE
*Loud voltage level: Lmax
*Low sound pressure level: Lmin
Percentile sound level: LN (1% to 99%, with a step size of 1%: * 5 values smaller are obtained from the instantaneous sound pressure level (Lp) or equivalent continuous sound pressure level (Leq).

Instantaneous sound pressure level: Lp
In addition to the main processing project, one of the following projects can be selected for simultaneous processing
C-weighted equivalent continuous sound pressure level: LCeq
C-weighted peak sound level: LCpeak
Z-weighted peak sound level: LZpeak
Pulse weighted average sound level: LAreq * 2
Every 5-second interval * average power of high level: LAtm5
The frequency weighting of additional processing is synchronized with the frequency weighting of the secondary channel. So when there is A-weighting in the secondary channel, LAtm5 can be selected. When choosing C-weighted (Z-weighted), additional processing LCeq, LCpeak, and LZpeak can be selected.

Time

10s, 1, 5, 10, 15, 30m, as well as 1, 8, 24h and manual labor (* maximum value is 24h)

microphone

model

UC-59

Sensitivity level

-27dB

measuring range

A-weighted: 25 dB to 138 dB
C-weighted: 33 dB to 138 dB
Z-weighted: 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

Inherent noise

A-weighted

17 dB or below

C-weighted

25 dB or below

Z-weighted

30 dB or below

Frequency range

20 Hz～20 kHz

frequency weighting

A. C and Z

time weight

F (fast) and S (slow)

Level range
Bar chart display range * large
Bar chart display conversion

Single range (dynamic range: 113dB)
*The maximum value is 110 dB (20 dB~130 dB)
Set upper and lower limits in increments of 10 dB

RMS detection circuit

Digital processing methods

sampling period

20.8 μ m (Lp, Leq, LE, Lmax, Lmin, and Lpeak, sampling frequency: 48kHz)
100ms(LN)

calibration

Measurement rule: Perform electrical calibration according to IEC and JIS standards.
Use signals generated internally.
Perform acoustic calibration using NC-74.

Correction function

Windshield correction:
When installing the windshield, it should be compatible with IEC 61672-1 and JIS C 1509-1.

Diffuse sound field correction:
Revise frequency characteristics to comply with the standard for diffuse sound fields (ANSI S1.4)

delay time

This instrument can be set to start measuring a specific time (disconnect, 1 second, 3 seconds, 5 seconds, or 10 seconds) when the start button is pressed or when the trigger set by the user is exceeded

Reverse deletion function

When the abort button is pressed to abort the measurement, the previously (user selectable) 0, 1, 3, or 5 seconds of data are not included in the processing.

monitor

Digital display update frequency
Bar chart update frequency

WQVGA type backlit semi transparent color TFT LCD display (400 × 240 dots)
*LCD with touchpad (capacitive touchpad).

1s (seconds)
100ms (milliseconds)

artificialSave
Number of data

automatic

Lp sampling period
Leq sampling period
Time

The measurement results are manually saved in increments of a single address.
Memory: * up to 1000 sets
SDCard: depends on the capacity of SD * *.
Instantaneous values (Lp mode) and processed values (Leq mode) are automatically and continuously saved at predetermined intervals.
100ms, 200ms, and 1s
10s and 1, 5, 10, 15, 30ms, as well as 1, 8, and 24h
*The maximum value depends onThe capacity of the SD card.

data retrieval

Allow observation of saved data

Set Storage

For future retrieval, up to 5 settings structures can be saved in memory.
It can be started by pre saving file settings on the SD card.

Waveform recording
File format
Sampling frequency
Length

Uncompressed waveform WAVE file
You can choose 48kHz, 24kHz, or 12kHz.
You can choose between 24 bits or 16 bits.

Output
DC output
Output voltage
AC output
Output voltage
Comparator output

Output a DC signal using the frequency weighted characteristics selected by the processing.
The bar chart displays 2.5V and 25mV/dB at full scale.
Output AC signal using frequency weighting characteristics selected by processing or A, C, Z weighting
The bar chart displays 1V (root mean square value) across the entire scale.
Enable when the output of the open collector exceeds the set value. The maximum application voltage is 24V, the maximum current is 60mA, and the allowable loss is 300mW

USB

Allow USB to connect to personal computers and be recognized as a removable disk.
Allow USB to control it through communication commands.

RS-232C communication

Allow the use of one * * cable for RS-232C communication

Continuous output of data
Data format
Instantaneous value
Processed values
Output interval

Lp
Leq, Lmax, Lmin, and Lpeak
100ms (milliseconds), 1s (seconds)

print out

Print out measurement data using the DPU-414 printer with * *

Power requirements

BATTERY LIFE

AC adapter
External power voltage
current consumption

4 IEC LR6 (A-A size) batteries (alkaline or rechargeable) or external power supply

Alkaline battery LR6 (A-A size): * maximum value is 26 hours
Ni MH Regenerated Battery: * Maximum value is 25 hours
NC-98C
5-7V (rated voltage is 6V)
Approximately 90mA (operating normally at rated voltage)

Surrounding environmental conditions
Temperature
humidity

－10°C～＋50°C
10% RH to 90% RH (no condensation phenomenon)

Dust and water resistance performance

IP code: IP54 (excluding microphone)

size

Approximately 250 (H) × 76 (W) × 33 (D) mm

weight

Approximately 400g

Standard configuration

Liyin Handheld NL-62 Precision Sound Level MeterInstrument optional parts

Instrument box

one

product name

PRODUCT MODEL

WS-10 windshield

one

Extension function program (installed on 512MB SD card)

NX-42EX

Rubber to prevent windshield from falling

one

Waveform recording program (installed on 2GB SD card)

NX-42WR

strap

one

Real time analysis program for octave band and 1/3 octave band

NX-42RT

Battery No.5

four

FFT analysis program

NX-42FT

Data management software for environmental measurement

AS-60

Waveform analysis software

CAT-WAVE

512MB SD card

SD-512M

2GB SD card

SD-2G

AC adapter (100V~240V)

NC-98C