Tổng quan
The CRY2851 sound level meter is developed specifically for noise monitoring in various application scenarios. The product series meets the relevant requirements of the GB/T 3785.1-2023/IEC61672-1:2013 standards, offering Class 1 accuracy products. in addition, based on different customer needs, a variety of functional options can be provided, including integral measurement, statistical analysis, 1/1 Oct,1/3 Oct, FFT analysis.
The CRY2851 adapts to diverse monitoring scenarios, making it ideal for applications such as environmental noise monitoring, traffic noise assessments, online noise pollution tracking, occupational health evaluations, and airport noise monitoring. Its flexibility and precision help establish accurate and reliable noise monitoring capabilities.
Tính năng
Wide Dynamic Range
The sound level meter can replace different microphones to adapt to various testing requirements. For example, the CRY344 microphone is suitable for testing scenarios with high sound pressure levels, such as aircraft engines and large industrial machinery, with a maximum testing sound pressure level exceeding 170 dB(A). In contrast, for internal noise testing in an anechoic chamber, the CRY311 microphone can be used, reaching a testing lower limit of 15 dB(A) or below. By switching between different microphones, the sound level meter can cover test needs from 15 dBA to 170 dBA.
Abundant Interfaces
The sound level meter is equipped with a comprehensive range of communication interfaces, including Ethernet, WiFi, Bluetooth, Type-C, headphone jack. SLM can transmit noise data to the host computer via Ethernet or WiFi, and connect to peripherals such as printers and headphones using Bluetooth and the headphone jack. Moreover, with the use of appropriate adapters, the device can convert network interfaces to RS-232 for seamless data transmission.
Sound level meter management software
The sound level meter is paired with management software. The software can connect and manage devices via Ethernet or WiFi, and consolidate data. Staff can use the management software to achieve functions such as real-time data monitoring, viewing historical data, exporting reports, downloading data, and more. Within the management software, Lp, Lmax, Lmin, Leq, Lpeak, LN(1-99), SD, EA, LAE(SEL), 1/1 OCT, 1/3 OCT, FFT, and other important acoustic parameters can be viewed.
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Sound Level Meter Features
The sound level meter built-in calibration, sound level measurements, statistical analysis, 1/1 octave band analysis, 1/3 octave band analysis, spectrum analysis, and a noise monitoring app. It can measure various noise parameters including Lp, Lmax, Lmin, Leq, Lpeak, LN(1-99), SD, EA, LAE(SEL), 1/1 OCT, 1/3 OCT,FFT analysis. Its comprehensive testing capabilities make it suitable for a range of noise measurements in scenarios like basic noise testing, environmental noise assessment, product quality control, and occupational noise evaluations.
Easy To Operate
The sound level meter is equipped with a 4-inch LCD touchscreen display, featuring power, direction, and cancel physical buttons, allowing customers to choose their preferred mode of operation. Additionally, the design of the sound level meter considers ergonomic principles for easy handling. The device's 1/4-inch threaded interface at the bottom can be paired with a standard tripod mount for extended outdoor monitoring. Furthermore, the sound level meter is designed with a detachable preamplifier interface, enabling users to freely switch between standard monitoring mode and monitoring mode with extended cables.
Occupational Noise Measurement
The sound level meter can be utilized for occupational noise exposure testing. Staff members can conduct 8-hour sound exposure monitoring in the workplace using the sound level meter to obtain relevant noise monitoring data. This data includes parameters such as the equivalent continuous A-weighted sound level LAeq (Lex) and the equivalent A-weighted sound level -EA- value, which are used to assess the level of sound exposure.
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Aircraft Noise Monitoring around Airports
The sound level meter can be used with the NA41 outdoor protective cover for noise monitoring at airports. The noise data collected by the device can be transmitted to a data center via wireless or wired networks. By combining noise data with flight information, it becomes possible to objectively assess the noise impact around the airport, understand the patterns and characteristics of noise emission changes and intensities. This provides technical and data support for noise control at airports, enhancing the automation, standardization, and intelligence of aircraft noise monitoring around airports.
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Environmental Noise Monitoring
Sound level meters are used to record noise levels on site, and the data can be monitored remotely and downloaded for statistical analysis and assessment of environmental noise levels using post-processing software. This solution is suitable for both short-term noise assessments and long-term monitoring applications.When conducting noise monitoring outdoors with a powerful sound level meter, equipping it with an outdoor microphone and protective cover makes it suitable for long-term continuous noise monitoring in outdoor environments.
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Thông số kỹ thuật
Microphone
Microphone type CRY333
Open circuit Sensitivity 50mV/Pa(-26dB re 1 V/Pa)±2dB
Frequency range 3.15Hz~20kHz(±2dB)
Self-generated noise level ≤16dBA
Linear Operating Range 21 dBA ~ 143 dBA
Frequency range 10Hz~20kHz
Internal noise ≤18dBA
Applicable standards GB/T3785.1-2010 Class 1 ；IEC61672-1: 2013 Class 1
Certified CE，CPA，CCEP
Weighting filters Frequency weighting: A, C, Z
Time constants Time Weighting: S, F, I
Measuring Parameter Lp, Lmax, Lmin, Leq, Lpeak, LN(1-99), SD, EA, LAE(SEL), 1/1 OCT, 1/3 OCT, FFT
Measurement function SLM, Statistic, 1/1Octave（16~20kHz）, 1/3Octave（10~20kHz）, FFT
Statistics LN (L1-L99)
Communication Interfaces Ethernet/Bluetooth/WiFi
Memory Internal 8GB, external SD card, supports 32GB/64GB.
GPS Time synchronization and localization
Calibration
Reference Level 94dB@1kHz/114dB@1kHz
Calibration Sound Calibrator Class 1
Environment Temperature 23°C ；Pressure 101.325kPa ； Humility 50% RH
Power Supply
Battery 6600mAh lithium battery
Operation Time 17h(screen,BT,WiFi off）
Charging Time 4h
External Power Supply USB Type C
USB input voltage 5V DC
Ambient conditions for operation
Operating temperature range -20~+60℃
Humidity range ≤90% RH
Physical
Weight 460g
Size L*W*H=260mm*90mm*40mm
Display 4-inch TFT-LCD 480(RGB)*800
Operation Touch /Button
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Tiếng Việt
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