[NA-27/주파수분석계]

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NA-27/주파수분석계

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실시간 1/1 1/3 옥타브밴드 측정기 (NA-27)
환경부 형식 승인 제품 (NESM-64/65)

특징

	적분형 정밀 소음계로 계량법, JIS 및 IEC 규격에 적합 (하나의 마이크로폰 출력신호에 대해 다른 동특성 주파수 웨이팅 조건을 기본으로 다양한 모드 동시계측)
	1/1 & 1/3 옥타브밴드 Real-time 분석 (1/3 옥타브 : 12.5 Hz ~ 12.5 KHz 1/1 옥타브 : 16Hz ~ 8 KHz)
	잔향 시간 측정 (수치 및 그래프로 동시표시)
	측정모드 : Lp, Leq, LE, Lmax, Lmin, Lpeak, Lx, Impulse, Ltm3, Ltm5, P_AVE, P_SUM, REVERB
	본채널, 보조채널로 두 가지 모드 실시간 동시 측정 가능
	사용 용도 편리에 따라 조건부 Start & Stop 기능 (외부트리거, 레벨트리거, 시간트리거)
	적외선 리모컨에 의해서 원격조작 가능
	광통신 Port에 의해서 PC를 사용한 데이터 수집 (NA-Software)

Applicable standards	IEC 651 : 1979 Type 1, IEC 804 : 1985 Type 1, JIS C 1505-1988
Applicable standards	JIS C 1513-1983 Type Ⅲ, ANSI SI. 11 Type 1D, IEC 1260-1995
Microphone and preamplifier	1/2-inch prepolarized condenser microphone UC-53A and
Microphone and preamplifier	preamplifier NH-20
Dual Measurement and real-time frequency analyser	Main and sub
	Individual frequency weighting and time weighting settings are possible for main and sub channels. 1/1, or 1/3 octave band real-time frequency analysis capability in main channel.

Measurement functions	Instantaneous sound pressure level (Lp)
	Equivalent continuous sound pressure level (Leq)
	Sound exposure level (LE)
	Maximum and minimum sound pressure level (Lmax and Lmin)
	Percetile sound pressure level (5 values selectable from L1, L5,
	L10, L50, L90, L95, L99)
	Takt-max sound pressure level (Ltm3, Ltm5)*
	Wavefrom peak hold (Lpeak)*
	*sub channel only
Measurement time	(except for instantaneou sound pressure level Lp)
	Presetting from 1 to 99 (units : h, m, s)
	Manual measurement by start and stop (max. 99 h)
	Lx requires more than 10 s setting.
Max. measurement level	140 dB rms, 133dB at c.f.3, 143 dB peak for peak hold
Noise floor	Typical 17dB (A) rms
Frequency range	20 - 12500 Hz (including microphone)
Frequency range	10 - 20000 Hz (electrical characteristics)
Frequency weighting	A, C, Flat (main and sub channels)
Time weighting	Main channel : Fast, Slow, 35ms, 10ms
Time weighting	Sub channel : Fast, Slow, 35 ms, 10 ms, Impulse, Peak hold
Display	Backlit LCD panel (192 x 192 dots)
	Sound level meter display
	Numerical : 4 digits, update cycle 1 s, resolution 0.1 dB
	Bar graph* : Scale range 60 dB in 0.5-dB steps, update cycle 0.1s
	Analyzer display
	Numerical : 4 digits, update cyle 1 s, resolution 0.1 dB
	Bargraph* : Scale range 70 dB in 0.5-dB steps, update cycle 0.1s
	Level-time : Min. 120 address, Max. all address
	*main channel only
	Real-time clock : Year, Month, Day, Hour, Minute, Second
Level range	Sound level meter mode (Display range : 60 dB)
	7 range in 10-dB steps : 20 - 80, 30 - 90, 40 - 100, 50 - 110,
	;60- 120, 70 - 130, 80 - 140 dB
	Analyer mode (Display range : 70 dB)
	7 ranges in 10-dB steps : 10 - 80, 20 - 90, 30 - 100, 40 - 110,
	;50 - 120, 60 - 130, 70 - 140 dB
Memory	Manual and auto store modes for instantaneous values and processing results
	1 block for manual store mode, 2 block for auto store mode
	Manual : all measurement data to be store
	Capacity : 200 data
	Auto :
	Single store : Selected data to be stored continuously
	Capacity : 10000 data (sound level meter mode)
	;4000 data (1/1 oct. analysis)
	;2000 data (1/3 oct. analysis)
	Group store : All measurement data to be stored continously Capacity : 200 group data

Trigger function	Trigger source : Input signal, External signal, Time dat
Time display function	Processing start can be desplayed by 1 to 10 s
Pause function	Normal pause function and back-erase function to delete data acquired 1 to 5 s before
Infrared rays communication	Data transmission with a PC
Infrared rays communication	Remote control by an infrared rays controller (NA27RC1)
Printout function	(Optional printer CP-10, CP-11)
	Single mode : One current data on screen or one data stored
	on memory
	Successive mode : Successive data at designated address area
Signal output	AC output (for main and sub channels)
	DC output (for one channel only, selected by menu)
	External trigger input
	Serial interface : RS-232-C 9 pin D-sub
	Infrared rays data transmission : Max. 50 cm
	Infrared rays remote control : Max. 3 m
Power requirements	4 to 6 V DC, approx. 320 mA (at 5 V, 1/3 oct analysis mode, 20℃)
	Battery : Four IEC R14P (size "C") batteries
	Life : Approx. 8 h (alkaline batteries, continuous operation,
	1/3 oct. analysis)
	AC adapter : AC adapter NC-94, 100 to 240 V (option)
	Power cable : AA-38-222 (option)
Ambient conditions for	- 10 to + 50 ℃, 30 to 90% RH
operation	- 10 to + 50 ℃, 30 to 90% RH
Dimensions, weight	Approx. 30 (H) x 10 (W) x 5 (D) cm, approx. 800g (including batteries)
Supplied accessories	Windscreen x 1, Carrying case x 1, Tripod adapter x 1,
	IEC R6 batteries x 4, Lithium battery CR-1/3Nx 1,
	Remote controller x 1, Miniature screwdriver x 1,
	Instruction manual x 1