Introduction: HY128 sound level meter is a digital multi-function sound level meter, designed to measure the frequency weighted and time weighted sound pressure level, equivalent continuous sound level, exposure sound level, statistical sound level, etc. of various types of noise Acoustic evaluation, it has 4 working modes of integration average, integration parallel, statistical analysis and 24h measurement for users to choose. The instrument also provides optional low-frequency weighting for secondary radiation noise measurement. The HY128 sound level meter is a class 1 sound level meter. The sound level meter complies with the national standard GB/T 3785.1-2010 and the international standard IEC 61672-1:2013 "Sound Level Meter", GB/T15952-2010 and IEC61252:2002 "Personal Requirements of the "Specification for Sound Exposure Meters". The secondary radiation noise meets the requirements of "JGJ/T 170-2009 Urban Rail Transit-induced Building Vibration and Secondary Radiation Noise Limits and Measurement Methods Standards", and the 24h noise monitoring complies with GB 3096-2008 "Acoustic Environmental Quality Standards" In accordance with the requirements of HJ 640-2012 "Environmental Noise Monitoring Technical Specifications for Urban Acoustic Environment Routine Monitoring", the coding of environmental monitoring points meets the requirements of HJ 661-2013 "Environmental Noise Monitoring Point Coding Rules". The HY128 sound level meter is a hand-held instrument with powerful functions and excellent performance, which is suitable for long-term, reliable and accurate measurement of various types of noise. This series of products has two types of explosion-proof type and non-explosion-proof type. The explosion-proof type is divided into intrinsically safe explosion-proof and mine intrinsically safe explosion-proof. It has an 8G SD card inside, and comes standard with AA battery power supply. At the same time, users can choose the power bank provided by the company to supply power according to their needs. The instrument also has functions such as recording, timing shutdown, GPS positioning, Bluetooth, etc. It is suitable for on-site measurement of noise from mechanical and electrical products, environmental noise, traffic noise, industrial hygiene, and workplace noise. Technical Parameters: Microphone: HY207 pre-polarized capacitive type 1 engineering measurement microphone, free-field frequency response, nominal diameter 12.7 mm, nominal sound pressure sensitivity of 50 mV/Pa (nominal sound pressure sensitivity level of -26 dB, The reference value is 1 V). Frequency range: 10Hz-20kHz. Frequency weighting: A weighting, C weighting, Z weighting. Time weighting: F (fast), S (slow), I (pulse). Low frequency weighting: 16Hz～200Hz (used for secondary radiation noise measurement) Measuring range: 30dB(A)-130dB(A), 40dB(C)-130dB(C), 45dB(Z)-130dB(Z) Performance level: performance meets the requirements of GB/T3785 and IEC61672 level 1. Preset time: manually set, the measurement duration is 3 s ~ 99 h 59 min 59 s. Display: 128×128 dot matrix liquid crystal display (LCD), resolution 0.1dB, display Lp, Leq, LAE, L5, L10, L50, L90, L95, Lmax, Lmin, LCpeak and other parameters, with overload and under Signs such as limit of quantity and low battery voltage. Analog output: The output jack is a 3.5 mm dual-channel headphone jack, and the minimum load impedance is 10 kΩ. ——DC voltage output: 15 mV/dB, 450 mV～1950 mV in the whole measurement range, (that is, 1950 mV when the upper limit of the measurement range is 130 dB, and 450 mV when the lower limit is 30 dB). ——AC voltage output: The output voltage has a linear relationship with the measured sound pressure, which corresponds to the upper limit of the measurement range, and the root mean square value of the output voltage is 2.0V. Data output connector: USB B-type socket for data output, which can be connected to the upper computer program for data processing, or directly send commands to the computer for data transmission. Print output connector: The output connector is DB9 male (pin type), RS232 serial communication port, ASCII code output, and external RD-V32-SN portable mini thermal printer. SD card: 8G. Power supply: 2 AA batteries or a special power bank provided by the company for this product. Dimensions: length×width×thickness 210mm×68mm×31 mm. Weight: 210g. Operating temperature range: -10℃～50℃.
Introduction: HY128 sound level meter is a digital multi-function sound level meter, designed to measure the frequency weighted and time weighted sound pressure level, equivalent continuous sound level, exposure sound level, statistical sound level, etc. of various types of noise Acoustic evaluation, it has 4 working modes of integration average, integration parallel, statistical analysis and 24h measurement for users to choose. The instrument also provides optional low-frequency weighting for secondary radiation noise measurement. The HY128 sound level meter is a class 1 sound level meter. The sound level meter complies with the national standard GB/T 3785.1-2010 and the international standard IEC 61672-1:2013 "Sound Level Meter", GB/T15952-2010 and IEC61252:2002 "Personal Requirements of the "Specification for Sound Exposure Meters". The secondary radiation noise meets the requirements of "JGJ/T 170-2009 Urban Rail Transit-induced Building Vibration and Secondary Radiation Noise Limits and Measurement Methods Standards", and the 24h noise monitoring complies with GB 3096-2008 "Acoustic Environmental Quality Standards" In accordance with the requirements of HJ 640-2012 "Environmental Noise Monitoring Technical Specifications for Urban Acoustic Environment Routine Monitoring", the coding of environmental monitoring points meets the requirements of HJ 661-2013 "Environmental Noise Monitoring Point Coding Rules". The HY128 sound level meter is a hand-held instrument with powerful functions and excellent performance, which is suitable for long-term, reliable and accurate measurement of various types of noise. This series of products has two types of explosion-proof type and non-explosion-proof type. The explosion-proof type is divided into intrinsically safe explosion-proof and mine intrinsically safe explosion-proof. It has an 8G SD card inside, and comes standard with AA battery power supply. At the same time, users can choose the power bank provided by the company to supply power according to their needs. The instrument also has functions such as recording, timing shutdown, GPS positioning, Bluetooth, etc. It is suitable for on-site measurement of noise from mechanical and electrical products, environmental noise, traffic noise, industrial hygiene, and workplace noise.
