Castle Sonus GA116L 声级计（30-100分贝）

Instrument Standards: IEC 61672-1 : 2002 ; IEC 61252 : 1993
Range: 30-100 dB
Display range: 29-103 dB
Peak range: 40-103 dB
Measurement Channels: Two
Parameters : Lp, Leq, Lmax, APeak, Cpeak, Zpeak, LE, Pa2h, Lep’d, Noise Dose, Noise Dose Per Hour, L10, L90, Ln (user selectable), Measurement Run Time, Overload, Interval Duration
Linear Operating range: 70 dB
Frequency Weighting:‘A’, ‘C’ and ‘Z’
Time Weighting: Slow, Fast and Impulse
Percentiles: L10, L90 hoặc L1 , L5 , L50 , L95 , L99
Exchange rate: 3dB, 4dB or 5dB
Criterion Level: 75dB, 80dB, 85dB or 90dB
Threshold Level: -5dB, -10dB or OFF
Memory: 2100 Data Intervals Maximum in one or multiple recordings
Microphone (Type Free Field): Sound Meter Operation: ACO 7146A pre-polarized ½” condenser microphone, 25mV/Pa. Dose Meter Operation (OPTIONAL): ACO 7052 pre-polarized ½” condenser microphone, 25mV/Pa
Microphone Preamplifier: Sound Meter Operation: Low Noise, Removable Preamplifier. Dose Meter Operation: Removable Preamplifier (OPTIONAL)
Noise Floor: <18.5dB(A) , <18.6dBC , <20.5dB(Z)
Castle Sonus GA116L Logging Sound Level Meter ( Class 1, 30-100 dB )
Display: LCD with Contrast Control, digit size 7mm x 5mm
Batteries: 1 x PP3 (9V), 12h
External Power: 12v - 18v 
Connections: 9 Pin Multi Purpose I/O Socket for: USB (Cable Supplied), AC Output, External Power