1. Introduction
The Testo 0563 8155 is a precision sound level meter designed for accurate measurement of sound levels in various environments. This instrument is suitable for applications such as air conditioning, heating system analysis, machine noise assessment, and combustion system noise monitoring. It adheres to DIN/IEC 60651, class 2 standards, ensuring high accuracy and reliability. This manual provides essential information for the proper setup, operation, and maintenance of your Testo 0563 8155 sound level meter.
2. Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in injury or damage to the instrument.
- Do not expose the instrument to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping the instrument or subjecting it to strong impacts.
- Do not attempt to open or modify the instrument. Refer all servicing to qualified personnel.
- Ensure the battery compartment is securely closed during operation to prevent moisture ingress.
- Dispose of batteries according to local regulations.
3. Product Overview
The Testo 0563 8155 sound level meter features a robust design with an intuitive button layout for ease of use. Below are key components and controls:

Figure 1: Front view of the Testo 0563 8155 Sound Level Meter, showing the display, microphone, and control buttons.

Figure 2: Angled view of the Testo 0563 8155 Sound Level Meter, highlighting its ergonomic design and side profile.
3.1 Controls and Display
- Display: Shows current sound level readings, selected weighting, and time response.
- Microphone: Located at the top, protected by a foam windscreen, for capturing sound.
- MAX/MIN Button: Toggles between current, maximum, and minimum measured values.
- A/C Button: Selects frequency weighting (A or C).
- LEVEL Button: Adjusts the measurement range (Lo, Med, Hi).
- FAST/SLOW Button: Switches between fast and slow time weighting.
- Power Button: (Typically integrated with other buttons or a dedicated switch) Turns the device on/off.
- Tripod Knuckle Screw (1/4"): Located at the bottom for mounting on a tripod.
4. Setup
4.1 Battery Installation
- Locate the battery compartment cover on the rear of the instrument.
- Open the cover and insert one 9V battery, ensuring correct polarity.
- Close the battery compartment cover securely.
The Testo 0563 8155 requires one 9V battery, which is included with the device. The typical battery life is approximately 70 hours.
4.2 Initial Adjustment
An adjustment screwdriver is included for fine-tuning the instrument. Refer to the specific calibration instructions provided with your device for detailed adjustment procedures. This ensures the meter maintains its specified accuracy.
5. Operating Instructions
5.1 Powering On/Off
Press the power button (refer to your device for exact location, often combined with another function or a dedicated switch) to turn the sound level meter on. Press and hold the same button to turn it off.
5.2 Selecting Measurement Range
Press the LEVEL button to cycle through the available measurement ranges: Lo (32-80 dB), Med (50-100 dB), and Hi (80-130 dB). Select the range appropriate for the expected sound levels to ensure optimal accuracy.
5.3 Frequency Weighting (A/C)
Press the A/C button to switch between A-weighting and C-weighting:
- A-weighting (dB(A)): Mimics the human ear's response to sound, commonly used for environmental and occupational noise measurements.
- C-weighting (dB(C)): Provides a flatter response, suitable for measuring peak sound pressure levels or machine noise.
5.4 Time Weighting (FAST/SLOW)
Press the FAST/SLOW button to select the desired time weighting:
- FAST: Responds quickly to changes in sound level, suitable for capturing transient noise events.
- SLOW: Provides an averaged reading, useful for measuring steady noise levels.
5.5 Maximum and Minimum Value Memory
Press the MAX/MIN button to display the maximum or minimum sound level recorded since the last reset. Pressing it again will cycle back to the current reading or show the other stored value. To clear the memory, refer to the specific instructions in your device's full manual, as this often involves a long press or specific button combination.
5.6 Taking a Measurement
- Turn on the instrument.
- Select the appropriate measurement range using the LEVEL button.
- Choose the desired frequency weighting (A or C) with the A/C button.
- Set the time weighting (FAST or SLOW) using the FAST/SLOW button.
- Hold the meter in the area where sound is to be measured, ensuring the microphone is unobstructed and pointed towards the sound source.
- Read the sound level directly from the display.
6. Maintenance
6.1 Cleaning
Wipe the instrument with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the microphone or other openings.
6.2 Battery Replacement
When the battery indicator appears on the display, replace the 9V battery as described in Section 4.1. Always use a fresh, high-quality 9V battery.
6.3 Storage
When not in use for extended periods, remove the battery to prevent leakage. Store the instrument in a clean, dry place within the specified storage temperature range of 14 to 140 °F (-10 to 60 °C).
7. Troubleshooting
- No Power: Check if the battery is correctly installed and fully charged. Replace the battery if necessary.
- Inaccurate Readings: Ensure the correct measurement range, frequency weighting, and time weighting are selected for the application. Verify the microphone is unobstructed. Consider recalibration if issues persist.
- Display Issues: If the display is blank or shows erratic characters, try replacing the battery. If the problem continues, contact customer support.
8. Specifications
| Parameter | Value |
|---|---|
| Model Number | 0563 8155 |
| Measuring Range | 32 to 130 dB |
| Accuracy | +/-1.0 dB |
| Resolution | 0.1 dB |
| Frequency Range | 31.5 Hz to 8 kHz |
| Frequency Weighting | A and C |
| Time Weighting | Fast / Slow |
| Operating Temperature | 32 to 104 °F (0 to 40 °C) |
| Storage Temperature | 14 to 140 °F (-10 to 60 °C) |
| Battery Type | 1 x 9V battery |
| Battery Life | Approx. 70 hours |
| Dimensions | 10.04 x 1.69 x 2.17 inches (255 x 43 x 55 mm) |
| Weight | 6.88 ounces (195 g) |
| Manufacturer | Testo AG |
9. Warranty and Support
For warranty information and technical support, please contact Testo AG directly or visit their official website. Keep your purchase receipt as proof of purchase for any warranty claims.





