Metravi SL-3010 Digital Sound Level Meter
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A. Product Overview
The Metravi SL-3010 is a handheld digital sound level meter designed for quick and reliable measurement of sound pressure levels. Its compact construction makes it convenient for indoor noise detection, quality-control inspections, workplace monitoring and general acoustic testing.
The meter uses a half-inch condenser microphone to detect sound and displays the measured value on a four-digit LCD. It measures sound levels between 30 and 130 dB with a resolution of 0.1 dB and a stated accuracy of ±1.5 dB under specified reference conditions.
Key Features
- Sound-level measuring range of 30 to 130 dB
- Resolution of 0.1 dB
- Accuracy of ±1.5 dB at a 1 kHz reference source
- Frequency response from 31.5 Hz to 8 kHz
- A-frequency weighting
- Fast response time of 125 milliseconds
- Slow response time of 1000 milliseconds
- Maximum and minimum reading recording
- Data-hold function
- Backlit four-digit LCD
- Under-range and over-range indication
- Low-battery indication
- Automatic power-off after approximately five minutes of inactivity
- Half-inch condenser microphone
- Compact size and lightweight construction
- Powered by three AAA batteries
- Designed to withstand a fall from a height of up to one metre under the stated test condition
B. Working Principle
The Metravi SL-3010 measures sound through its condenser microphone. When sound waves reach the microphone, they create pressure variations. The microphone converts these acoustic pressure variations into an electrical signal.
The internal electronic circuit processes this signal and converts it into a sound-pressure-level reading expressed in decibels.
The measurement process can be understood in four stages:
- The condenser microphone detects sound-pressure variations.
- The detected sound is converted into an electrical signal.
- The signal is processed using A-frequency weighting.
- The calculated sound level is displayed on the LCD in decibels.
A-Frequency Weighting
The SL-3010 uses A-frequency weighting. This weighting reduces the influence of very low and very high frequencies to provide a reading that more closely represents the general frequency sensitivity of human hearing.
Fast Response Mode
Fast mode uses a sampling response of approximately 125 milliseconds. It is useful for observing rapidly changing sound levels, machine noise and short-term fluctuations.
Slow Response Mode
Slow mode uses a response time of approximately one second. It provides a more stable reading when the sound level changes continuously or fluctuates quickly.
Maximum and Minimum Measurement
The maximum and minimum function records the highest and lowest sound-level readings detected during the measurement period.
Data Hold
The data-hold function freezes the current reading on the display, allowing the operator to record or review the measured value.
C. Why the Metravi SL-3010 Is Used
The Metravi SL-3010 is used to identify, compare and monitor noise levels in different environments. Excessive or unexpected noise may indicate an uncomfortable working environment, improper machine operation, acoustic problems or the need for further professional assessment.
The meter helps users:
- Measure sound levels in decibels
- Compare noise levels at different locations
- Check machinery and equipment noise
- Identify unusually noisy operating conditions
- Conduct basic workplace noise surveys
- Monitor environmental and traffic noise
- Test home and commercial audio-system output
- Record maximum and minimum sound readings
- Observe rapidly changing or stable noise conditions
- Perform quality-control noise checks
- Evaluate sound levels before carrying out detailed acoustic testing
- Document spot measurements during inspection and maintenance work
The SL-3010 is suitable for general sound-level measurement and spot checking. Applications requiring personal noise-dose monitoring, long-term logging or regulatory compliance reports may require a specialised noise dosimeter or professional integrating sound level meter.
D. Suitable Buyers
The Metravi SL-3010 Digital Sound Level Meter is suitable for:
- Industrial maintenance teams
- Factory supervisors
- Quality-control departments
- Safety officers
- Facility-management companies
- Electrical and mechanical contractors
- Machinery service engineers
- Production engineers
- Environmental monitoring professionals
- Traffic and community-noise survey teams
- Audio technicians
- Home-theatre installers
- Educational institutions
- Training laboratories
- Acoustic consultants performing preliminary checks
- Building maintenance teams
- Workshop owners
- Event and venue technicians
- Occupational health and safety consultants
- General inspection professionals
Frequently Asked Questions
1. What does the Metravi SL-3010 measure?
The Metravi SL-3010 measures sound pressure level and displays the result in decibels.
2. What is the measuring range of the SL-3010?
The meter measures sound levels from 30 to 130 dB.
3. What is the resolution of the meter?
The sound-level resolution is 0.1 dB.
4. What is the accuracy of the Metravi SL-3010?
The stated accuracy is ±1.5 dB when tested using a standard 1 kHz audio source under specified environmental conditions.
5. What is the frequency-response range?
The meter has a stated frequency response from 31.5 Hz to 8 kHz.
6. Does the SL-3010 support A-frequency weighting?
Yes. The Metravi SL-3010 uses A-frequency weighting for general noise measurement.
7. What is the difference between Fast and Slow modes?
Fast mode has a response time of approximately 125 milliseconds and is suitable for rapidly changing noise. Slow mode has a response time of approximately one second and provides a more stable reading for fluctuating sound.
8. Does the meter record maximum and minimum sound levels?
Yes. The maximum and minimum function records the highest and lowest readings detected during the measurement period.
9. Does the SL-3010 have a data-hold function?
Yes. The Hold function freezes the displayed sound-level reading for convenient recording and review.
10. Does the display have a backlight?
Yes. The LCD includes a backlight for improved readability in low-light locations.
11. What happens when the sound is outside the measuring range?
The display shows an under-range indication when the sound is below the supported range and an over-range indication when it exceeds the supported range.
12. Does the meter switch off automatically?
Yes. It automatically powers off after approximately five minutes without operation.
13. What type of microphone is used?
The SL-3010 uses a half-inch condenser microphone.
14. What batteries are required?
The instrument operates using three 1.5 V AAA batteries.
15. Is it suitable for factory noise measurement?
Yes. It can be used for general factory noise checks, machine-noise comparison, quality control and preliminary workplace-noise assessment.
16. Can it be used for traffic and environmental noise monitoring?
Yes. It is suitable for spot measurements of traffic, residential and general environmental noise.
17. Can it measure home-audio and speaker sound levels?
Yes. It can be used for general home-audio, speaker and sound-system level measurement within its specified range.
18. Is the Metravi SL-3010 a noise dosimeter?
No. It is a handheld sound level meter intended for spot measurements. A dedicated noise dosimeter is generally required to measure a person’s accumulated noise exposure over an extended period.
19. Is the SL-3010 suitable for indoor use?
Yes. The catalogue specifies it for indoor use under the stated operating temperature, humidity and altitude conditions.
20. How often should the meter be calibrated?
The catalogue specifies a calibration period of one year. Actual calibration frequency may also depend on usage conditions, internal quality procedures and applicable regulations.