SL-13A
Sound Level Meter 
User manual
Before using the instrument,please read this manual carefully,and save it well for future using.
Introduction
This sound level meter is used to measure the sound level of the environment: such as factory, workshop, school, residence, office area, traffic road, audio and so on. Also suitable for noise engineering, product quality control, health prevention and control, etc. It can also measure ambient temperature and humidity.
Display screen
| symbols | description | symbols | description |
 |
Auto power off |  |
Data hold |
| MAX | Maximum value | MIN | Minirmum value |
| °C | Celsius | RH% | Humidity unit |
| °F | Fahrenheit |  |
Low battery |
| FAST | Quick response | SLOW | Slow response |
| dB | Decibel unit| | A | A weighted |
| C | C weighted |
Operation
Considerations
- Wind blowing across the microphone increases the noise measurement. Use the supplied windscreen to cover the microphone when applicable.
- Calibrate the instrument before each use if possible. Especially if the meter has not been used for a long period of time.
- Do not store or operate the instrument in areas of high.
- Keep meter and microphone dry.
- Avoid severe vibration.
- Remove the battery when the meter is to be stored for long periods of time.
Measurement
- Open the protection cover of the meter.
- Press the
button to tur on the power. - After the power is turned on, the meter will start to display the sound pressure level reading.
- Hold the meter and let the microphone face the sound source to be measured.
- Read the measured value from the display.
- Press the button to turn off the power.
Fast/slow time weighted selection
Use the 
button to select ‘FAST’ (125 ms) or ‘SLOW’ (1 sec) time weighting.
Depending on the selection, ‘FAST’ or ‘SLOW’ appears on the display.
Select the ‘FAST’ response to capture noise peaks as well as fast-emerging noise. The ‘SLOW’ response is selected to monitor sound sources with consistent noise sound pressure levels, and also to average out rapidly changing noise. Fast response can be selected for most applications.
Data hold
Press the 
button to enable the data retention function. Press the button again to turn off the data hold function and return to the normal measurement function.
Backlight
Press the button and hold it for more than 2 seconds to enable or disable the backlight function.
MAX/MIN function
Press the 
button to enable the maximum and minimum functions, and then press the button to display the maximum and minimum values. Press and hold for about 2 seconds to retum to normal measurement function.
Temperature unit selection
Press the 
button to shift the temperature unit, C or .
A/C weighted selection(for model B)
Press and hold for about 2 seconds to switch A or C weighted.
Automatic Power Off
When the instrument is turned on, the symbol s displayed. The automatic shutdown function is tumed on by default. If there is no operation within 10 minutes, the meter will automatically shut down.
If you need to cancel the automatic shutdown function, press and hold the button before turning on the instrument, then press the button to turn on the power of the instrument, release the button after tuming on the instrument, and cancel the automatic shutdown if the symbol is not displayed.
Restart the instrument after shutdown to restore the automatic shutdown function.
Specifications
| Display screan | LCD display | |
| Sound level measurement | Range | 30-130dBA or 30-130dBC(for model B) |
| Frequency | 30Hz —8KkHz | |
| pynamic Range | 50dB | |
| Acouracy | +1.50B (94dB@1KHz) 5dB (94dB@8KHzZ) | |
| Freauency weighting | Aweighting. C weighting(for model B) | |
| Time weighting | FAST: 125ms, SLOW: 1sec | |
| Microphone | Electret condenser | |
| Temperature | Range | 20.0°C ~60.0°C(-4.0°F~140.0°F) |
| Acouraey | 0.0°C ~ 45.0°C(32°F) ~113%F) 1 £1.0°C12.0°F .”Others: 1.5°C/3.0°F |
|
| Humidity |
Range |
0.0% ~99.9%RH |
| Acouraey | 20%- 80%: £5.0RH; Others: 6.0RH | |
| Operating conditions | 0~50°C, <80%RH, altitude less than 2000m | |
| Storage conditions | -10~50°C, | |
| <B0%RH(remove the batiery) | ||
| Auto power off | 10minutes | |
| Power | 3 x 1.5VAAA batteries | |
Maintenance
Battery replacement
When the meter shows the symbol “ please replace the battery in ime.
- Unscrew the battery cover, and then open the battery cover.
- Remove the batteries from the battery compartment.
- Install the new battery correctly according to the positive and negative marks on the bottom of the battery compartment.
- Reinstall the battery cover and fasten he screws to secure it.
Cleaning
Cauton
To avoid damaging the case, do not use corrosive agents or solvents to clean the instrument.
Wipe the shell regularly with detergent or damp cloth and detergent.
Documents / Resources
 |
HTC INSTRUMENT SL-13A Sound Level Meter [pdf] User Manual SL-13A Sound Level Meter, SL-13A, Sound Level Meter, Level Meter, Meter |
