DT 8820 - Thermometer VOLTCRAFT - Free user manual and instructions
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| Product type | 4-in-1 environmental multimeter (thermometer, lux meter, sound level meter, hygrometer) |
| Brand | Voltcraft |
| Model | DT 8820 |
| Dimensions | 251 x 85 x 40 mm (with sensor holder) |
| Weight | Approx. 360 g (without external sensors) |
| Power supply | 9V alkaline battery (type 6LR61, MN1604, 6F22 or 006P) |
| Power consumption | Approx. 6 mA |
| Display | 3½-digit LCD, max value 1999 |
| Main functions | Light intensity (lux), relative humidity (%), sound level (dB), temperature (°C/°F) |
| Temperature range (type K probe) | -20 °C to +750 °C |
| Temperature range (built-in sensor) | 0 °C to +50 °C |
| Humidity range | 25% to 95% RH |
| Sound level range | 35 dB to 130 dB (A and C curves) |
| Light intensity range | Up to 20,000 lux (display with factor 10) |
| Humidity accuracy | ±5% (at 25 °C, 35% to 95% RH) |
| Temperature accuracy (K probe) | ±(3% reading + 2 °C) from -20 °C to 200 °C; ±(3.5% reading + 2 °C) from 200 °C to 750 °C |
| Sound accuracy | ±3.5 dB at 94 dB / 1 kHz |
| Light accuracy | ±(5% reading + 10 digits) for color temperature 2856 K |
| Auto power off | After approx. 10 minutes |
| Operating temperature | 0 °C to +50 °C |
| Storage temperature | -10 °C to +60 °C |
| Package contents | Unit with micro case, light sensor, type K thermocouple, 9V battery, user manual |
| Maintenance | Clean with a clean, dry, lint-free cloth; do not use solvents |
| Safety | Max. input protection 60 VDC / 24 VAC; only measure on de-energized objects |
Frequently Asked Questions - DT 8820 VOLTCRAFT
How to use the temperature measurement function with the type K probe?
Connect the plug (13) of the thermocouple to the socket (7) of the device, respecting polarity. Set the switch (5) to 'TEMP' and use the 'SELECT' button to choose the range and unit (°C or °F). Guide the metal stem of the probe toward the de-energized heat source. The display shows the measured temperature.
What to do if the display shows 'OVER' during a measurement?
The 'OVER' display indicates that the selected measuring range has been exceeded. Use the SELECT button to switch to the next higher range (for example from LO to HI for sound or lux). If the display persists, the measured value exceeds the maximum capacity of the device.
How to change the battery of the Voltcraft DT 8820?
Turn off the device. Slide the battery compartment cover on the back in the direction of the arrow (OPEN). Replace the used battery with a new 9V battery (6LR61, MN1604, 6F22 or 006P), respecting polarity. Close the cover, taking care not to pinch the wires. Remove used batteries promptly to avoid corrosion.
What is the accuracy of the humidity measurement?
The relative humidity measurement accuracy is ±5% at a temperature of 25 °C and for a range of 35% to 95% RH. Stabilization time is about 6 minutes. Measurements are intended for comparative domestic use.
How to measure sound level correctly?
Turn on the device and set the switch to 'dB'. Point the microphone toward the sound source. For best results, place the device on a stable surface about 1 m from the source. Use the SELECT button to change range (LO/HI) and curve (A or C). Outdoors, keep the windscreen on the microphone.
Why does the device turn off by itself?
The device is equipped with an auto power-off function (Auto-Power-Off) that turns it off after about 10 minutes of inactivity to save battery. To turn it back on, press the green power button.
What does the BAT symbol on the display mean?
The BAT symbol (or battery icon) appears when the battery is low. It is then necessary to replace the battery with a new 9V battery to ensure proper operation of the device.
How to clean the device?
Use a clean, dry, lint-free and anti-static cloth. Never use products containing benzene, alcohol or similar solvents, as they may damage the surface. Also avoid sharp tools or metal brushes.
Can I measure the temperature of hot liquids?
Yes, with the type K thermocouple which is submersible and withstands temperatures up to 750 °C. Make sure the liquid is de-energized and the probe is properly connected. Hold the probe by the black handle and immerse only the metal stem. Observe the ambient temperature of the device (0-50 °C).
What safety precautions should be taken?
Never measure on live parts (max protection 60 VDC/24 VAC). Do not use the device in humid, dusty or explosive environments. Do not open the housing except to change the battery. Keep the device out of reach of children. Follow the instructions in the user manual to avoid any danger.
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