HT Instruments HT157 Máy đo độ ồn âm thanh lớp 1 và phân tích dải octa
MEASUREMENT RANGE
• Type A weighting: 25 ÷ 140dB
• Type C weighting: 30 ÷ 140dB
• Type Z (linear) weighting: 35 ÷ 140dB
• Peak C SLM: 50 ÷ 143dB
MICROPHONE: Pre-polarized condenser ½ “ with pre-amplifier; Nominal sensitivity (at reference conditions): 50mV/Pa; Frequency range: 10Hz ÷ 20kHz; Noise: < 16dB(A)
AC OUTPUT: Output ratio: 1mV AC / 0.1dB; Maximum output voltage: 3.2Vrms; Output impedance: 1kΩ
PC CONNECTION: mini-USB; USB pen drive
Level linear range: >90dB
Resolution: 0.1dB (Statistic), 0.01dB (1/1 e 1/3 OCT)
Frequency range: 10Hz ÷ 20kHz (±0.2dB) ; 1Hz ÷ 23kHz (±1.0dB)
Range gain: -10dB, 0dB, 10dB, 20dB, 30dB, 40dB
Range control error: ≤ 0.1dB
Self-generated noise voltage: <4µV (1Hz ÷ 23kHz linear)
Background noise: <13dB(A), 15dB(C), 25dB(Z)
Total noise: <18dB(A), 23dB(C), 28dB(Z)
Measuring voltage range: 15µV ÷10V (TRMS)
Frequency weighting: A / C / Z
Time weighting: Fast, Slow, Impulse, Peak C+, Peak C-
A/D internal converter: 24 bit
Anti-aliasing filter: cut-off frequency 23.5kHz, attenuation 100dB
Sampling rate: 20.8µs (48kHz)
Intergration time: 1s ÷ 24h pre-defined or customized
Internal memory: 64kBytes flash memory
Data storage: max 128 groups / max 256 calibrations
CHARACTERISTICS OF 1/1 OCT AND 1/3 OCT
Features: Noise’s real-time OCT and 1/3 OCT spectral analysis with integral measuring
Frequency weighting: A/C/Z
Spectral analysis interface: all spectrum frequencies
Total analysis interface: performed with digital filter
Z weighting added with one digital high-pass filter (cut-off frequency: 4Hz)
Filter type: digital, G=2 for 1/1 and 1/3 octave analysis
Central frequency of 1/1 analysis:
16Hz, 31.5Hz, 63Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz
Central frequency of 1/3 analysis::
12.5Hz, 16Hz, 20Hz, 25Hz, 31,5Hz, 490Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz,
250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz,
5kHz, 6.3kHz, 8kHz, 10kHz,12.5kHz, 16kHz
Noise exposure (E)’s range: 0 ÷ 65.535Pa2h
Accessories:
SOUNDVIEW
Rigid case HT157
Wind protection
HT150
4x1.5V alkaline batteries type A LR06
ISO9000 calibration certificate
Power supply 100-240VAC/5VDC with USB output
Cavo micro USB per collegamento PC
USB Pen Drive (TRASCEND JF V30/2GB)
USB cable for connecting the Pen Drive to the device
Calibration certificate of sound level meter and calibrator
Batteries and user manual
ຮັບສ່ວນຫຼຸດພິເສດຕາມປະລິມານ, ອັບເດດລາຄາຂາຍສົ່ງ ແລະ ການແຈ້ງເຕືອນສິນຄ້າໃໝ່ສົ່ງກົງເຖິງອິນບັອກຂອງທ່ານ.
ໂດຍການສະໝັກສະມາຊິກ, ທ່ານຍອມຮັບ ເງື່ອນໄຂການໃຫ້ບໍລິການ ແລະ ນະໂຍບາຍຄວາມເປັນສ່ວນຕົວ ຂອງພວກເຮົາ.
ເຂົ້າເຖິງຜູ້ຊ່ຽວຊານທີ່ໄດ້ຮັບການຢັ້ງຢືນຂອງພວກເຮົາໂດຍກົງ