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Integrating Sound Level Meters
LA-5570/5560/2560

Photo (LA-5570/5560/2560 Integrating Sound Level Meters)

The LA-5570/5560/2560 high-functionality sound level meters conform to various international sound level meter standards such as the JIS, IEC and CE-marking standards, and are designed to be easily connected to a PC. An SD memory card and a USB connector are provided as standard to meet the growing requirements for computer processing of measurement data captured to the LA series sound level meters. Data can be easily read just by connecting the sound level meter to a Windowsbased PC, without any special software required.

Note:
Certificate of CE marking has not been completed as yet and still under evaluation/testing. The description of CE marking should be disregarded now.

Features

Simultaneous Measurement of Six Conditions The LA-5570/5560/2560 sound level meters are capable of simultaneous measurement at the FAST, SLOW, and IMPULSE time weights with respect to the weight of the two frequency weights that were selected. Three different frequency weights can be selected: A-weighting, C-weighting, and flat response-weighting. Measurement can now be performed without having to worry about forgetting to capture some of the data.

Large, Easy-to-read Display The large 2.8" LCD (320 x 240 dots) used for the display screen provides improved legibility of the on-screen information. Calculation values such as Leq and LN and the setting menu parameters can be clearly and effortlessly read.

Mobile Phone-like Easy Operability The menus used for making the settings to perform measurement are easy-to-read and intuitive, enabling operation similar to that of using a mobile phone. Moreover, for enhanced operability, the parameters that are most frequently used have been assigned to the direct keys on the front panel of the sound level meter.

Simple and Easy Data Processing All the measurement results are stored on the SD memory card. To transfer the data to a PC, either use a USB cable to connect the sound level meter to a Windows-based PC, or insert the SD card directly into the computer's card slot. Special software to enable the Windows-based PC to read the data on the SD card is not required in either case. If required, spreadsheet or other similar software can be freely used to process the measured data.

Specifications

	LA-5570	LA-5560	LA-2560
Applicable standards	JIS C 1505:1988		JIS C 1502:1990
	IEC 60651:1979 Type1		IEC 60651:1979 Type2
	IEC 60804:2000 Type1		IEC 60804:2000 Type2
	ANSI S1.4-1983 & Amendment S1.4A-1985 Type1		ANSI S1.4-1983 & Amendment S1.4A-1985 Type2
	ANSI S1.43-1997 Type1		ANSI S1.43-1997 Type2
Measurement range (IEC)	19-127dB(A) 25-127dB(C) 33-127dB(F)	25-137dB(A) 29-137dB(C) 35-137dB(F)	25-130dB(A) 30-130dB(C) 36-130dB(F)
Measurement range (JIS)	22-120dB(A) 28-120dB(C) 36-120dB(F)	28-130dB(A) 32-130dB(C) 38-130dB(F)	25-130dB(A) 31-130dB(C) 37-130dB(F)
Frequency range	20Hz-12.5kHz	20Hz-20.0kHz	20Hz-8.0kHz
Microphone	MI-1211 1/2-inch bias	MI-1233 1/2-inch electret condenser	MI-1431 1/2-inch electret condenser
Level range	10-dB step x 6 levels/wide range x 2 levels
Linearity range	Normal range: 75 dB / wide range: 100 dB
Time weighting	FAST (125 ms), SLOW (1 s), IMPULSE (Rising 35 ms, Falling 1.5 s)
Frequency weighting	A, C, FLAT
Measurement parameters	Lp, TACTMAX, Leq, LE, PEAK, MAX, MIN, LN (LHI, L5, L10, L50, L90, L95, LLO, LAV, Arbitrary LN data [2])
Measurement time	User-specified (HH:MM:SS.S) from 0.1 s to 24 hr in 0.1-s increments
Dual mode function	Provided as standard (simultaneous measurement of two frequency weightings x 3 time weighting conditions for each).
Sampling interval	15.6 µs (Leq, LAE, PEAK, MAX, MIN) 100 ms (LN)
Display unit	Backlight 2.8" LCD (320 x 240 dots)
Digital display	4-digits/0.1 dB resolution/updated every 1s
Bar display	Standard: Display range 60 dB/Resolution 0.1 dB/updated every 0.1 s Wide range: Display range 90 dB/Resolution 1.0 dB/updated every 0.1 s
Low battery indication	The battery voltage (4 to 6V) is indicated by an 8-segment display (flashes when the battery is low).
Memory functions	OFF, AUTO (6 types), MAN, RECORD
Panel conditions memory	Power-off memory
Clock function	Built-in (Year/month/day/hour/second)
Backup functions	The battery backup function backs up the internal clock for approximately 20 days (the internal battery is automatically charged by the batteries or the AC adapter when the power is on).
Calibration signal	Built-in transmitter for electronic calibration (1 kHz sine wave) Normal range: -6dB full scale (wide range: -16 dB full scale)
AC output	Full scale: 0.707 Vrms (normal range)/2.236 Vrms (wide range)/Load resistance 10kΩ or higher Linearity range: 80 dB (normal range)/90 dB (wide range)
DC output	Full scale: 2.5 V Scale factor: 0.5 V/10 dB (normal range)/0.25 V/10 dB (wide range)/Load resistance 10kΩ or higher
RS-232C interface	Provided as standard, transmission speeds: 9600, 115200 bps
USB interface	Provided as standard, compliant with USB Mass Storage Class specification Ver. 1.1
*Extendable cable length1**	100 m
Power supply	Four AA batteries or AC adapter
Battery life (continuous use)	Approx. 8 hours (alkaline batteries)
Operating (storage) temperature range	-10 to +50°C (-20 to +60°C)
Operating (storage) humidity range	30 to 90%RH (10 to 90%RH)
Outer dimensions	85(W)×347(H)×50(D)mm	85(W)×279(H)×50(D)mm
Weight (including the batteries)	Approx. 550g	Approx. 500g
Accessories	AC adapter, signal cable:AX-501, windscreen, hand strap, batteries, carrying case, SD memory card (32 MB), user's manual

*1: The cable length given here is the length of each of the special cables sold by Ono Sokki.

Optional Functions

LA-0551/0552 Real-time Octave Analysis Functions

Real-time octave analysis functions can be added to the sound level meter. Adding one of these options expands the analysis range up to the 20-kHz band, and enables coverage of the entire audible range.

Applicable standards	JIS C1514 Class 1 IEC 61260 Class 1
Analysis bands	31.5 Hz to 16 kHz 10 bands (1/1 octave) 20 Hz to 20 kHz 31 bands (1/3 octave)
Calculated parameters	Simultaneous measurement of Leq / LE / LMAX / LMIN / Lp

A 1/1 octave band filter function and an NC value calculation function are included in the LA-0551's real-time octave analysis functions. A 1/3 octave band filter function and a loudness value calculation function*1 are included in the LA-0552's 1/3 real-time octave analysis functions.

*1: The loudness value calculation function is included in the LA-5560/5570 models only.

Measurement Data (Real-time Octave Analysis Functions)

LA-0553 Spectral Monitor Function

This is the first time that Ono Sokki has used its FFT technology, which has earned the company a reputation for reliability over the years, in an option for a sound level meter.

Number of analysis lines	400
X-axis expansion function	x1, x2, x4
Frequency ranges	1 kHz / 2 kHz / 5 kHz / 12.5 kHz / 25 kHz
Calculated parameters	Instantaneous values, power average
List display function	The 20 highest peak values

Measurement Data (Spectral Monitor Function)

LA-0554 Sound Recording Function

Use this option when you want to save sound data directly to a sound level meter.

Recording file format:	WAV file format
sampling rate	64 kHz
A/D resolution	16-bit
Calculated parameters	Instantaneous values, power average
List display function:	The 20 highest peak values

Data is captured to the SD memory card inserted in the sound level meter.*2

*2:A high-speed SD card (with a data transfer speed of at least 10 MB/s) is required when using the LA-0554 option to record sound data directly. The high-speed SD card is sold separately.

LA-0555 Advanced Comparator Function

This option enables a comparator level to be set in advance to provide a basis for comparison with the input sound pressure level. The compared results are output using the COMP OUT no-contact output terminal on the bottom surface of the sound level meter.

Delay time

Within 0.1 s

Output hold time: Can be set to 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, or 60 s. Moreover, if the sound level meter is fitted with the LA-0551/0552 option, the comparator function can also be used as an octave band comparator.

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