Cirrus research CR308 ເຄື່ອງວັດແທກລະດັບສຽງ (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
ຮັບສ່ວນຫຼຸດພິເສດຕາມປະລິມານ, ອັບເດດລາຄາຂາຍສົ່ງ ແລະ ການແຈ້ງເຕືອນສິນຄ້າໃໝ່ສົ່ງກົງເຖິງອິນບັອກຂອງທ່ານ.
ໂດຍການສະໝັກສະມາຊິກ, ທ່ານຍອມຮັບ ເງື່ອນໄຂການໃຫ້ບໍລິການ ແລະ ນະໂຍບາຍຄວາມເປັນສ່ວນຕົວ ຂອງພວກເຮົາ.
ເຂົ້າເຖິງຜູ້ຊ່ຽວຊານທີ່ໄດ້ຮັບການຢັ້ງຢືນຂອງພວກເຮົາໂດຍກົງ