Cirrus research CR308 騒音計 (30~130 dB, Class 2)

- Applicable Standards: IEC 61672-1:2013 Class 2

- Measurement Range:

30dB (A) to 130dB (A)

40dB (C) to 130dB (C)

- Frequency Weightings: A and C

- Time Weightings: Fast (F) and Slow (S)

- Display Functions: Normal, Maximum, Minimum, C peak

- Measurement Functions:LAF, LAS, LCF, LCS, LCpk

- Noisefloor: < 25dB (A) and 35dB (C)

- Display Flags: Threshold Limit, Overload, Under-range

- Auto Calibration Range: ±4.5dB

- Reference Point: 94dB (1kHz), 92.9dB (8kHz)

- Setting Time: 60s

- Display: Backlit 128×64 LCD，resolution 0.1 dB.

- Resolution: 0.1dB

- Electrical Inputs: 5V power in via mini USB

- Power: 2 x AA/LR6 1.5V batteries Or 5V DC via Mini USB

- Battery Life: 24hrs

- Microphone: ½˝ pre-polarised electret condenser type HY:205

- Operating Temperature: 0°C to +40°C

- Operating Humidity: 25% to 90%

- Atmospheric Pressure: 65 kPa to 108kPa

- Storage Temperature: -20°C to +60°C

- Dimensions: 215mm×68mm×32 mm

- Weight: 220g（including battery)

- Electrical Outputs: AC (Tip 3.5mm jack) and DC (middle 3.5mm jack)

- DC Output: voltage 15mV/dB, range 450mV to 1950mV

- AC Output: RMS 2V

Datasheet