1. Introducció
The Neoteck Digital Sound Level Meter NTK342 is a portable device designed for accurate measurement of sound levels in various environments. It features a wide measurement range of 30-130dB with an accuracy of ±1.5dB, making it suitable for home, factory, office, and school noise testing. The meter offers A/C weighting options, fast/slow response times, a backlit LCD display, and functions like MAX Hold for comprehensive sound analysis.
2. Informació de seguretat
- Llegiu aquest manual detingudament abans de fer funcionar el dispositiu.
- No exposeu el dispositiu a temperatures extremes, humitat o llum solar directa.
- Avoid strong vibrations or impacts to prevent damage.
- Ensure correct battery polarity when installing batteries.
- Traieu les bateries si el dispositiu no s'utilitzarà durant un període prolongat.
- Mantingueu el dispositiu fora de l'abast dels nens.
3. Contingut del paquet
Verifiqueu que tots els elements siguin presents al paquet:
- Neoteck Digital Sound Level Meter NTK342
- Bossa de transport
- Mini tornavís
- AAA Batteries (6 pieces, 3 required for operation)
- Manual d'usuari
Figure 3.1: Neoteck Digital Sound Level Meter NTK342 and its accessories.
4. Producte acabatview
Familiarize yourself with the main components of the sound level meter:
- Micròfon: Captures sound waves for measurement. Equipped with a foam windscreen.
- Pantalla LCD: Shows sound level readings, weighting, response time, temperature, and other indicators.
- Botons de control: For power, mode selection, and function activation.
- Compartiment de la bateria: Located at the rear, secured by a screw.
Figura 4.1: Frontal view of the Neoteck Digital Sound Level Meter NTK342.
5. Configuració
5.1 Instal·lació de la bateria
- Localitzeu el compartiment de la bateria a la part posterior del dispositiu.
- Use the included mini screwdriver to loosen the screw securing the battery cover.
- Traieu la tapa de la bateria.
- Introduïu tres (3) piles AAA, assegurant-vos de la polaritat correcta (+/-).
- Torneu a col·locar la tapa de la bateria i premeu el cargol.
5.2 Engegada/apagada
- Per encendre: Premeu el botó Poder botó (
) once. The LCD will illuminate. - Per apagar: Manteniu premut el botó Poder button for approximately 2 seconds. The device will also automatically shut off after 3 minutes of inactivity to conserve battery life.
6. Instruccions de funcionament
6.1 Mesura bàsica
After powering on, the device will immediately begin measuring sound levels. Hold the meter with the microphone pointed towards the sound source. The current sound level in decibels (dB) will be displayed on the LCD.
6.2 Selecció de ponderació del aire condicionat
The meter supports two weighting modes:
- Ponderació A: Simulates the human ear's response to sound, ideal for general environmental noise measurement.
- Ponderació C: Provides a flatter response, suitable for measuring the true sound level of machinery or industrial noise.
To switch between A and C weighting, press the A/C button. The selected weighting (A or C) will be indicated on the display.
Figure 6.1: A-weighting for environmental noise and C-weighting for machinery analysis.
6.3 Fast/Slow Response Selection
The meter offers two response speeds:
- FAST (0.125s): Suitable for capturing dynamic, rapidly changing sound levels.
- SLOW (1s): Provides a more stable, averaged reading for steady sound levels or environmental measurements with large variations.
To switch between FAST and SLOW response, press the RÀPID/LENT button. The selected response time will be indicated on the display.
Figure 6.2: Fast response for dynamic sounds and slow response for stable readings.
6.4 MAX/MIN Hold Function
This function allows you to capture the maximum or minimum sound level recorded during a measurement session.
- Premeu el botó MAX/MIN button once to display the maximum sound level recorded since the function was activated. The 'MAX' icon will appear.
- Premeu el botó MAX/MIN button again to display the minimum sound level recorded. The 'MIN' icon will appear.
- Premeu el botó MAX/MIN button a third time to exit MAX/MIN hold mode and return to real-time measurement.
6.5 Activació de la retroiluminació
The LCD display features a white backlight for improved visibility in low-light conditions.
- Premeu el botó MANTENIM /
Figure 6.3: Backlit LCD display for clear readings in various conditions.
