1. Introduction and Overview
The Extech 407730 is a digital sound level meter designed for accurate measurement of sound decibel levels. It is suitable for various applications including workplace machinery monitoring, audio system checks, and general environmental noise assessment. This manual provides essential information for the safe and effective use of your device.
1.1 Негизги өзгөчөлүктөрү
- Measures sound levels from 40 to 130dB with a digital display.
- Achieves 2dB accuracy with 0.1dB resolution.
- Features a fast-responding analog bar graph for visual trend analysis.
- Records Maximum (MAX) and Minimum (MIN) values over time.
- Батареянын иштөө мөөнөтүн үнөмдөө үчүн автоматтык түрдө өчүрүү функциясын камтыйт.
- Equipped with a Max Hold function to capture the highest reading.
- Selectable A/C weighting and Fast/Slow response times.
1.2 Пакеттин мазмуну
Таңгактан чыгарганда бардык буюмдар бар экенин текшериңиз:
- Extech 407730 Digital Sound Level Meter
- Микрофондун алдыңкы айнеги
- Төрт AAA батарейкасы
- Колдонуучунун Колдонмосу (бул документ)
Image 1.2.1: The Extech 407730 meter shown with its included microphone windscreen and AAA batteries.
2. Коопсуздук маалыматы
Read all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, or damage to the meter.
2.1 Жалпы коопсуздук
- Эгерде эсептегич бузулуп калса же корпусу ачык болсо иштетпеңиз.
- Avoid exposing the meter to extreme temperatures, humidity, or direct sunlight.
- Keep the meter away from strong electromagnetic fields.
- Clean the meter with a dry, soft cloth. Do not use abrasives or solvents.
2.2 Батарея коопсуздугу
- Use only the specified type and size of batteries (4 x AAA).
- Батареяларды орнотууда туура полярдуулукту камсыз кылыңыз.
- Эгерде эсептегич көпкө чейин колдонулбаса, агып кетүүнүн алдын алуу үчүн батарейкаларды алып салыңыз.
- Колдонулган батарейкаларды жергиликтүү эрежелерге ылайык жок кылыңыз.
3. Орнотуу
3.1 Батареяны орнотуу
- Батарея уясынын капкагын эсептегичтин арткы жагында табыңыз.
- Use a small Phillips head screwdriver to loosen the screw securing the cover.
- Капкакты алып салыңыз.
- Insert four (4) AAA batteries, observing the correct polarity (+ and -) as indicated inside the compartment.
- Батарея бөлүкчөсүнүн капкагын ордуна коюңуз жана буроону бекемдеңиз.
3.2 Алдыңкы айнекти бекитүү
The foam windscreen helps to minimize wind noise and protect the microphone. Gently slide the windscreen over the microphone at the top of the meter until it is securely in place.
4. Иштөө нускамалары
Familiarize yourself with the meter's controls and display before beginning measurements.
Сүрөт 4.0.1: Алдыңкы view of the Extech 407730 Digital Sound Level Meter, highlighting the display and control buttons.
4.1 Күйгүзүү/өчүрүү
- To power on the meter, press the КҮЧ button (red circle with line).
- To power off the meter, press and hold the КҮЧ button until the display turns off. The meter also features an auto power-off function after a period of inactivity.
4.2 Өлчөөлөрдү алуу
Hold the meter with the microphone pointed towards the sound source. Ensure no obstructions are blocking the microphone. The current sound level will be displayed on the LCD screen.
Image 4.2.1: A hand holding the Extech 407730 Digital Sound Level Meter, demonstrating its ergonomic design for handheld use.
4.3 A/C Weighting Selection
басыңыз A/C button to toggle between A-weighting and C-weighting. The selected weighting will be indicated on the display.
- А-салмак салуу: Simulates the human ear's response to sound, commonly used for environmental noise measurements.
- C-салмак салуу: Provides a flatter response, suitable for measuring peak sound levels or noise from machinery.
4.4 Fast/Slow Response Time
басыңыз F/S button to select between Fast and Slow response times. The chosen response time will be shown on the display.
- Fast Response: Captures rapid changes in sound levels (e.g., impulsive noise).
- Жай жооп берүү: Provides an averaged reading, suitable for measuring steady noise levels.
4.5 MAX Hold Function
басыңыз MAX Hold button to freeze the highest measured sound level on the display. Press it again to exit MAX Hold mode and resume real-time measurements.
4.6 Диапазонду тандоо
басыңыз RNG button to cycle through available measurement ranges. This allows for optimal resolution across the meter's 40 to 130dB range.
4.7 Recording Max/Min Values
басыңыз REC button to begin recording the maximum and minimum sound levels. Press REC again to stop recording. The recorded MAX and MIN values can then be viewдисплейде ed.
Image 4.7.1: The Extech 407730 Digital Sound Level Meter being used outdoors, potentially for environmental noise monitoring near an airport.
Image 4.7.2: The Extech 407730 Digital Sound Level Meter being used in an industrial environment, suitable for monitoring machinery noise levels.
5. Техникалык тейлөө
5.1 Тазалоо
Счетчиктин сasing with a soft, dry cloth. Do not use abrasive cleaners, solvents, or strong detergents, as these may damage the plastic components or the display. Keep the microphone free from dust and debris.
5.2 Сактоо
When not in use, store the meter in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for an extended period, remove the batteries to prevent leakage and potential damage to the device.
6. Кыйынчылыктарды
This section addresses common issues you might encounter with your Extech 407730 Digital Sound Level Meter.
| Көйгөй | Мүмкүн себеп | Чечим |
|---|---|---|
| Эсептегич күйбөйт. | Өлүк же туура эмес орнотулган батарейкалар. | Батареянын полярдуулугун текшериңиз. Жаңы AAA батарейкалары менен алмаштырыңыз. |
| Туура эмес окуулар. | Microphone obstructed, incorrect weighting/response, or environmental interference. | Ensure microphone is clear. Select appropriate A/C weighting and Fast/Slow response. Move away from strong electromagnetic fields. |
| Дисплейде 'OL' (Ашыкча жүктөө) көрсөтүлөт. | Sound level exceeds the current measurement range. | басыңыз RNG button to select a higher measurement range. |
| Auto power-off too frequent. | Meter is designed to power off after inactivity. | This is a feature to conserve battery life. Press any button to keep the meter active. |
7. Техникалык шарттар
| Параметр | Нарк |
|---|---|
| Өлчөө диапазону | 40 – 130 дБ |
| Тактык | ±2 дБ |
| Резолюция | 0.1 дБ |
| Жыштыкты өлчөө | А жана С |
| Жооп убактысы | Тез / жай |
| Дисплей | Digital LCD with Analog Bar Graph |
| Микрофон | 1/2-inch Electret Condenser Microphone |
| Электр камсыздоо | 4 x AAA Батареялар (кошулган) |
| Батареянын иштөө мөөнөтү | Approximately 30 hours (typical) |
| Авто өчүрүү | Yes (after inactivity) |
| Өлчөмдөр | 9 x 1.7 x 2.2 дюйм (228 x 43 x 56 мм) |
| Салмагы | 8.11 унция (230 г) |
| Иштөө температурасы | 32°F – 122°F (0°C – 50°C) |
| Иштөө нымдуулугу | 10% - 80% RH (конденсацияланбаган) |
8. Кепилдик маалыматы
The Extech 407730 Digital Sound Level Meter is backed by a manufacturer's one-year limited warranty on parts and labor. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, unauthorized modifications, accident, or neglect. Please retain your proof of purchase for warranty claims.
9. Колдоо жана байланыш
For technical assistance, troubleshooting beyond this manual, or warranty service, please contact Extech Instruments customer support. Refer to the official Extech webакыркы байланыш маалыматы жана колдоо булактары үчүн сайт.
Extech Instruments Official Webсайт: www.extech.com
