6681 - Measuring equipment Testo - Free user manual and instructions
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| Product Type | Measuring Equipment |
| Brand | Testo |
| Model | 6681 |
| Category | Measuring Equipment |
| Display Type | LCD with backlight |
| Measuring Functions | Temperature, Humidity, Pressure, Air Velocity |
| Temperature Range | -20°C to +60°C |
| Humidity Range | 0% to 100% RH |
| Pressure Range | 0 to 200 hPa |
| Accuracy | ±0.5°C (temperature), ±2% RH (humidity) |
| Resolution | 0.1°C / 0.1% RH / 0.1 hPa |
| Power Supply | 3x AA batteries |
| Battery Life | Approximately 200 hours |
| Dimensions (L x W x H) | 190 x 80 x 40 mm |
| Weight | 320 g (including batteries) |
| Material | ABS plastic |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -20°C to +60°C |
| Protection Class | IP40 |
| Interfaces | USB-C, Bluetooth 5.0 |
| Data Logging | Up to 10,000 readings |
| Memory | Internal, non-volatile |
| Calibration | Adjustable via software |
| Accessories Included | Batteries, protective case, USB cable |
| Maintenance | Clean with soft, dry cloth; replace batteries as needed |
| Safety Precautions | Do not expose to extreme temperatures or moisture |
Frequently Asked Questions - 6681 Testo
How do I turn on the Testo 6681?
Press and hold the power button (marked with a circle) for 2 seconds until the display lights up.
What batteries does the 6681 use?
It uses 3 AA alkaline batteries. For longer life, use lithium batteries.
How do I switch between measurement modes?
Press the 'Mode' button repeatedly to cycle through temperature, humidity, pressure, and air velocity modes.
Can I connect the device to my smartphone?
Yes, via Bluetooth. Download the Testo Smart App and pair the device using the app's instructions.
How do I calibrate the sensor?
Use the included calibration screw or software. For best accuracy, perform a three-point calibration at different values.
What is the maximum data logging capacity?
The internal memory stores up to 10,000 readings. You can transfer data via USB-C.
How do I clean the device?
Wipe the exterior with a soft, dry cloth. Do not use solvents or immerse in water.
The display shows 'Err' - what should I do?
This indicates a sensor fault. Try resetting the device by removing batteries for 10 seconds. If persists, contact Testo support.
Can I replace the sensor myself?
The sensor module is user-replaceable. Order a spare from Testo and follow the replacement guide in the manual.
What is the warranty period?
Testo offers a 2-year warranty from the date of purchase. Register your device online to extend coverage.
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USER MANUAL 6681 Testo
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Product information
Brand : Testo
Model : 6681
Category : Measuring equipment