Portable Sound Level Meter

· NSM-138V sound level meter fully complies with the newest IEC 61672-1: 2013 Class 1 standard 

· Integrated the smart algorithms and a wide measurement range of 25- 140 dB, the device can be used in both industrial and public applications with the highest standards

· The meter features a modern design with a high-durability ABS/Polycarbonate plastic cover, lightweight and easy to carry

· It uses an energy-efficient battery, supports measurement result storage with a 4 GB internal memory and up to 64 GB via a microSD card 

· Accurately measures Leq, T, Lmax, and Lmin values (chosen interval sound level, maximum sound level, and minimum sound level). Displays continuous sound level and chosen interval sound level 

· The device wirelessly connects to a thermal printer via Bluetooth to print out measurement results

· The 2.4-inch LCD color screen is easy to operate, measuring and displaying multiple indicators simultaneously. The Vietnamese interface and printout are user-friendly

· The result printout includes full information in Vietnamese: date and time, measurement result, work unit, testing location, tester, etc.

· The thermal printer is separate from the meter, making it convenient for repair and replacement, saving costs, and maximizing usage time.

· Measurement range: 25 - 140 dB

· Frequency range: 10 Hz - 20 kHz

· ADC resolution: 24 bits

· Sampling frequency: 48 kHz

· Accuracy level: IEC 61672-1:2013 Class 1

  o At 20 Hz: ±2 dB

  o At 25 Hz: +2 dB, -1.5 dB

  o At 31.5 Hz: ±1.5 dB

  o At (40 to 800) Hz: ±1.0 dB

  o At 1 kHz: ±0.7 dB

  o At 10 kHz: +2 dB, -3 dB

  o At 16 kHz: +2.5 dB, -16 dB

· Time weighing: F, S

· Frequency weighing: A, C, Z

· Display: 2.4-inch LCD color screen, resolution 240 x 320 pixels

· Display resolution: 0.1 dB

· Data storage: 4G internal storage, supports up to 64G via microSD card.

· Output interface: AC, DC, USB, IO expansion port

· Measuring time: 1 second to 99 hours

· Control buttons: 10 buttons

· Language: Vietnamese

· Power supply: 04 AA LR6 batteries or 5V/1A external power supply

· Main measurement indicators: Lxyp, Lxeq, T, Lxeq, t, Lxmax, Lxmin, LxE, Lxpeak, E, etc.

· Dimensions (H x W x D): 75 mm x 32 mm x 249 mm

· Weight: 0.32 kg

· Working temperature: -30oC ÷ 60oC

· Relative humidity: 5% ÷ 95 %

· Case: IP67 standard, water and dust proof

· Printer: High-speed thermal printer wirelessly connects with the device via Bluetooth 

· The result printout in vietnamese with full information:

  o The unit logo

  o Meter infomation 

  o Date and time

  o Tester infomation: Full name, work unit

  o Testing location

  o Driver information: Full name, license plate

  o Measuring result: Lmax, Lmin, Leq, T, LE (maximum sound level, minimum sound level, chosen interval sound level, sound exposure level)

  o Driver’s signature

  o Tester’s signature.

· 01 NSM-138V Sound level meter

· 01 Microphone

· 01 Windshield

· 01 Thermal printer

· 01 Battery charger for thermal printer

· 03 Thermal paper rolls

· 01 User manual

· 01 Hard carry case

· 01 Tripod

· 01 3m tape measure

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