SL-4022 精密型噪音計

特色

• 測量範圍 : 30dB ~ 130dB(分貝).

• 測量頻率範圍 : 31.5 ~ 8000Hz

• 精確度 : ±1dB (94dB/1KHz)

• 符合國際規範IEC651Type2

• A/C頻率加權及時間加權選擇'快&慢選擇

• 可抓取最大噪音值功能

• 交流訊號輸出

• Size : 260 x 87 x 36mm.

FEATURES

► Frequency weighting networks are designed to meet the IEC 61672 CLASS 1.

► Large LCD display, easy to read.

► A & C weighting networks are conformity to standards.

► FAST & SLOW dynamic characteristic modes.

► AC output for system expansion.

► Build in adj. VR, available for easy calibration.

► Condenser microphone for high accuracy & long-term stability

► Build max. hold reset switch.

► Max. Hold function for stored the maximum value on display

► Warning indicator for over and under load.

► LCD display for low power consumption & clear read-out even in bright ambient light condition.

► Used the durable, long-lasting components, including a strong, light weight ABS-plastic housing case.

► Compact and light weight plastic housing.

► Low battery indicator.

一般規格

顯示 (Display)

1 8 mm (0.7") LCD (Liquid Crystal Display), 3 1/2 digits.

功能 (Function)

dB (A & C frequency weighting), Time weighting (Fast, Slow), Max. hold, Max. hold reset, AC output.

測量範圍 (Measurement Range)

3 ranges ( 30 - 70 dB, 60 - 100 dB, 90 - 130 dB ),

解析度 (Resolution)

0.1 dB.

精確度 (Accuracy) (23± 5 ℃)

Frequency weighting meet IEC 61672 Class 1, calibrating input signal on 94 dB the accuracy of frequency weighting is specified as following:
31.5 Hz : ± 2.0 dB, 63 Hz : ± 1.5 dB, 125 Hz : ± 1.5 dB,
250 Hz : ± 1.4 dB, 500 Hz : ± 1.4 dB, 1 KHz : ± 1.1 dB,
2 KHz : ± 1.6 dB, 4 KHz : ± 1.6 dB, 8 KHz : + 2.1 dB to -3.1 dB,

加權網路 (Weighting Network)

Characteristics of A & C.

A weighting - The characteristic is simulated as "Human Ear Listing" response. Typical, if making the environmental sound level measurement, always select to A weighting.

C weighting - The characteristic is near the "FLAT" response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment.

測量頻率 (Measurement Frequency)

31.5 Hz to 16 KHz. * Accuracy is tested within 31.5 Hz to 8 KHz.

校正器 (Calibrator)

B & K (Bruel & kjaer), multi-fuction acoustic calibrator, model : 4226.

麥克風 (Microphone type)

Electric condenser microphone.

麥克風尺寸 (Size of microphone)

1/2 inch standard size.

範圍選擇 (Range selector)

30 to 70 dB, 60 to 100 dB, 90 to 130 dB, 40 dB on each step, with over & under range indicating.

快慢時間加權 Time weighting (Fast, Slow)

Fast - t= 200 ms, Slow - t = 500 ms,

* "Fast" range is simulated the human ear response time.

* "Slow" range is easy to get the avg. values of vibration sound level.

* The "Fast" & "Slow" response range are designed to meet IEC 61672 class 2 requirement.

輸出訊號 (Output Signal)

Build in external calibration VR, easy to calibrate on 94 dB level by screw driver.
Internal oscillation system, 1 KHz sine wave generator.

輸出端子 (Output terminal)

3.5 mm dia. phone output terminal is provided for connection with analyzer, level recorder, tape recorder.

校正 VR (Calibration VR)

* Build in external calibration VR, easy to calibrate by external screw driver.

操作溫度 (Operating Temp. )

 0 to 50 ℃. ( 32℉ to 122℉ ).

操作溼度 (Operating Humidity)

Less than 80% R.H.

電源供應 (Power Supply)

DC 9V battery x 2 PCs, 006P, MN1604 ( PP3 ) or equivalent, heavy duty or alkaline type.

電源損耗 (Power Consumption)

Approx. DC 17 mA.

重量 (Weight)

450 g/0.99 LB

尺寸 (Size)

260 x 87 x 36 mm ( 10.2 x 3.4 x 1.4 inch ).

附件 (Standard Accessory)

Instruction Manual............................................................................................................ 1 PC.
Calibration screw driver.................................................................................................... 1 PC.
Carrying case................................................................................................................... 1 PC.

選購附件 (Optional & accessories Temp. Probe)

94 dB Sound Calibrator, model : SC-941.
94/114 dB Sound Calibrator, model : SC-942.
Wind shield ball, model : SB-01.