LA1400s- thiết bị đo cường độ âm thanh

LA-1410	●Integrating sound level meter (Class 2) for product testing and measuring the sound level generated from machines etc. ●High-performance and cost-effective model
LA-1440	●Integrating sound level meter (Class 2) for measuring the working environment and environmental noise ●Auto measurement function by timer and trigger. ●Level trend can be recorded at the interval from 1ms. (L_p memory function) ●Equipped with USB and RS-232C interfaces
LA-4440	●Precision integrating sound level meter (Class 1) for sound analysis and product testing. ●Time weighting (10ms, Impulse) corresponding to the fast sound fluctuation. ●Level trend can be recorded at the interval from 1ms. (L_p memory function) ●Equipped with USB and RS-232C interfaces

Class 1 LA-4440 (Precision integrating sound level meter)

Class 2 LA-1410/1440 (Integrating sound level meter)

	LA-1410	LA-1440	LA-4440
Applicable standard	IEC 61672-1：2002 Class 2		IEC 61672-1：2002 Class 1
	JIS C 1509-1：2005 Class 2		JIS C 1509-1：2005 Class 1
Microphone	1/2-inch backelectret-type condensor microphone MI-1432 Nominal sensitivity level:－29 dB		1/2-inch backelectret-type condensor microphone MI-1234 Nominal sensitivity level:－29 dB
Preamplifier	MI-3111 Preamplifier for mocrophone
Linearity range	100 dB
Measurable frequency range	10 Hz to 8 kHz(IEC, JIS)		10 Hz to 20 kHz(IEC, JIS)
Measurement level range	Ａ：26 to 137 dB(IEC, JIS) C：31 to 137 dB(IEC, JIS) Z：36 to 137 dB(IEC, JIS)		A ：27 to 137 dB(IEC, JIS) C：30 to 137 dB(IEC, JIS) Z：35 to 137 dB(IEC, JIS)
Frequency weighting	A，C，Z
Intrinsic noise	A：20 dB or less C：25 dB or less Z：30dB or less		A：19 dB or less C：22 dB or less Z：27dB or less
Level range	20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50 to 110 dB, 60 to 120 dB, 70 to 130 dB, 40 to 120 dB
Time weighting	FAST, SLOW		FAST, SLOW, Impulse, 10 ms
Measurement items	L_p, L_eq , L_E, L_max, L_min, L_pk, L_Ｎ(L_HI, L₅, L₁₀, L₅₀, L₉₀, L₉₅, L_LO, L_AV)
Level trend	Ｌ_p, every kind of calculated value	L_p, every kind of calculated value (Read out the displayed value as auto memory call)
Sampling interval	31.25 μs (other than L_N ) 100 ms(L_N)		20.8 μs (other than L_N) 100 ms(L_N)
Measurement time	Manual, arbitrary setup (199 h 59 m 59 s max.)
Total measurement time	---	Arbitrary setup (199 h 59 m 59 s max.)
Start mode	Manual only	Manual, timer (time setting, in increment of 1 second), trigger (can be started after a lapse of specified time [0 to 10 seconds, in increment of 1 second] after trigger detection: trigger delay function)
Calibration	Electrical calibration by internal calibration signal (1 kHz sine wave), calibration by external sound calibrator
Recommended sound calibrator	SC-3100A Sound calibrator (piston-phone type)
Display	LCD with LED backlight semitransparent (124 x 64-dot) Measurement value display by numeric and bar indicators List display and trend graph display for various kinds of calculated values Displays of date, time, measurement time, and conditions of various kinds of instruments
Display update time	Display by numeric:1 s, display by bar indicator: 0.1 s, trend screen: 0.2 s
Manual memory function	Total calculated values: 100 addresses
Auto memory function	---	L_eq: 1000 addresses x 200 blocks Total calculated values: 100 addresses x 200 blocks
L_p Record memory function	---	Sound level with time weighting is stored at the specified interval. (1000 address × 200 blocks) Storing intervals (1 ms, 2 ms, 5 ms and 10 ms)
Measurement condition memory function	Condition memories (9 kinds)
Resume function	Settings activated at power ON can be selected from follows; settings used at previous power OFF, factory setting, and any condition memory number which is set from menu.
Backup function	The backup of data stored in clock and memory can be performed by built-in secondary power source. • Time for full charged: approx. 24 hours • Backup period: more than 3 months (when stored at temperature of 23 °C)
AC output *¹	0.707 Vrms/F.S (normal range), 2.238 Vrms/F.S. (wide range), load resistance 10 Ω or more (with upper-limitation value of bar indicator) Frequency weighting can be selected: conjunction with selected frequency weighting or fixed to Z-weighting.
DC output *¹	2.5 V/F.S. (with upper-limitation value of bar indicator) Amount of voltage fluctuation per 10 dB: 0.25 V Load resistance: 10 kΩ or more
External control input	---	Operation: toggle operation of start/place in pause Specifications of hardware: negative pulse input (voltage level: Low:0.0 to 0.5 V, Hi:3.0 to 50 V) Pulse width: 100 ms or more Absolute maximum rated input voltage: 5 V
Comparator function (Option: LA-0141) *²	---	Set comparison value：40.0 to 130.0 dB (in increment of 0.1 dB) Comparison item：L_max or L_peak Delay time：0 ms, 100 ms, 1 s, 5 s HOLD time：100 ms, 1 s, 5 s, manual Output logic： negative or positive logic Output format：open collector (withstand voltage:+3 to +24 VDC, current:50 mA or less)
Timer function	Built-in (year/month/day/hour/minute)
RS-232C	---	Control of operation, data output, print out (to the DPU-414 printer) Baud rate：9,600/115,200 bps
USB	---	Control of main unit and data output, print out (to BL-112U printer) USB2.0 FULL SPEED (connecting virtual COM port)
Cable extension *3 (Between microphone and main unit)	305 m max.		105 m max.
Power requirement	Type AA battery × 2 pcs. (manganese (6R) or alkaline (LR6) or oxyride (ZR6)) or PB-7090 AC adapter (option)
Battery life (continuous using)	Approx. 8 hours (LR6 alkaline battery in use / 23 °C/ backlight off / not RS-232C･USB in use)
Operating (storage) temperature range	-10 to 50 °C (-20 to 60 °C)
Operating (storage) humidity range	25 to 90 %RH (10 to 90 %RH) with no condensations
Outer dimensions	Approx. 78(W) × 263(H) × 47(D) mm
Weight (including batteries)	Approx. 375 g(including batteries)
Accessories	Windscreen×1 (φ 70 mm), carrying case×1, hand strap×1, type AA battery × 2 pcs.
Option	LA-0141 Comparator output SC-2120A Sound calibrator (speaker type) SC-3100A Sound calibrator (piston-phone type) AG-2010 Microphone extension cable (10 m) AG-2030 (30 m) Microphone extension cable (30 m) AG-2050 (50 m) Microphone extension cable with code reel (50 m) AG-2100 (100 m) Microphone extension cable with code reel (100 m) LA-0203C Tripod for sound level meter PB-7090 AC adapter (100 to 240 VAC) AX-501 Signal input-output cable (2 m) AX-5022 RS-232C cable for PC (2 m) DPU-414 Thermal printer ( AX-5024 RS-232C cable for printer (2 m) is supplied as standard) PW-C0725-W1-U AC adapter (100 to 240 VAC) for DPU-414 BL-112UI Recommended thermal printer with USB interface (by SANEI Electronics)

*1 AC or DC output is selectable from menu of sound level meter.
*2 Comparator function (LA-0141, option) cannot be installed with the LA-1410.
*3 The cable length given here is the length when each of the exclusive cable sold by Ono Sokki is used. The cable length less than 30 m is applicable to CE marking.