YSD135 mining intrinsically safe sound level meter Introduction: The YSD135 mining intrinsically safe sound level meter is a Class 1 high-precision, intrinsically safe noise measuring instrument produced by our company, specifically designed for use in explosive gas environments such as coal mines and metal and non-metal mines. Typical Applications Noise monitoring in underground coal mine tunnels, working faces, and machine rooms Inspection and enforcement of occupational health noise exceeding standards in mines Noise detection of underground equipment (fan, water pump, coal shearer) Noise measurement in metal and non-metal mines and other explosive environments Features: 1. Multi-functional fully digital sound level meter 2. Personal sound exposure meter and noise dosimeter 3. Octave and one-third octave analyzers (optional) 4. Simultaneously measure sound levels weighted by various frequencies and time 5. Automatic start-stop measurement 6. Type Approval Certificate Number for Measuring Instruments: 2023S155-43 7. Mine-used Intrinsic Safety Explosion-proof Certificate No.: CQEx21.2368 8. Safety Mark Certificate Number for Coal Mine Products: MFA220170 9. Safety Mark Certificate Number for Metal and Non-Metallic Mining Products: KFA220077 Technical Specifications: 1. Performance level: Level 1 as specified in GB/T 3785.1-2023 / IEC 61672-1:2013. 2. Measured and evaluated parameters: LP, Leq, LE, L5, L10, L50, L90, L95, Lmax, Lmin, LCpeak, Leq8h, Dose, E, SD, and other parameters. 3. Microphone: HY207 Type Class 1 engineering measurement microphone, with a nominal diameter of 12.7 mm and a free-field frequency response. The nominal sound pressure sensitivity is 40 mV/Pa (nominal sound pressure sensitivity level is -28 dB, with a reference value of 1 V). When calibrated with a sound calibrator, the self-sound field correction value is 0.2 dB at a calibration frequency of 1 kHz. 4. Frequency range: 10 Hz to 20 kHz. 5. Frequency weighting: A-weighting, C-weighting, Z-weighting. 6. Time weighting: F (fast response), S (slow response), I (impulse response). 7. Measurement range: A-weighted sound pressure level: 28 dB to 135 dB; C-weighted sound pressure level: 35 dB to 135 dB; Z-weighted sound pressure level: 45 dB to 135 dB. 8. Sampling frequency: 48 kHz. 9. Display: 2.2-inch dot matrix liquid crystal display (LCD), with a resolution of 128×128 and a resolution power of 0.1dB, featuring indicators for overload, out-of-range, and low battery voltage alarms. 10. Digital output: The output connector is a DB9 male (pin type) RS232 serial communication port with a modulation rate (baud rate) of 9600 Bd, which can be externally connected to an RD-V32-SN portable micro thermal printer. 11. Analog output: direct logarithmic voltage and AC linear voltage. 12. Storage: TF card, 32 Gibit (up to 64 Gibit optional). 13. Power supply: 2 LR6 (5#) batteries. 14. Instrument power: not greater than 1W. 15. Overall dimensions: length × width × thickness 210 mm × 68 mm × 31 mm. 16. Weight: 210g. 17. Shell material: PC flame-retardant and anti-static material. 18. Operating temperature range: -10℃ to 50℃.
YSD135 mining intrinsically safe sound level meter Introduction: The YSD135 mining intrinsically safe sound level meter is a Class 1 high-precision, intrinsically safe noise measuring instrument produced by our company, specifically designed for use in explosive gas environments such as coal mines and metal and non-metal mines. Typical Applications Noise monitoring in underground coal mine tunnels, working faces, and machine rooms Inspection and enforcement of occupational health noise exceeding standards in mines Noise detection of underground equipment (fan, water pump, coal shearer) Noise measurement in metal and non-metal mines and other explosive environments
