testo 825-T1-T2-T3-T4 and 826-T1-T2-T3-T4 Infrared Thermometer User Manual

About this manual

This manual provides operating instructions for testo infrared thermometers models 825-T1/T2/T3/T4 and 826-T1/T2/T3/T4. It details measurement ranges, accuracy, emissivity settings, and operating temperature limits. The device supports both contact and infrared measurement modes, with automatic shut-off and alarm functions. Battery types and life vary by model, and the device is IP67 rated when using the TopSafe cover. Safety warnings include not looking at the laser beam. This manual is written in German.

What's inside

• Infrared Measurement
• Contact Measurement
• Settings
• Alarm Settings
• Battery Replacement
• Operating Temperature
• Emissivity
• Laser Safety
• Automatic Switch-Off
• TopSafe Cover

Specifications

Frequently asked questions

What is the measuring range for testo 825-T1/T2/T3/T4?

The measuring range is -50°C to +250°C (up to 500°C maximum for 5 seconds).

What is the accuracy for testo 826-T3/T4?

The accuracy is ±0.5°C for the range -30°C to +99.9°C, and ±1°C or ±1% of m.v. for the remaining range (larger value applies).

What is the emissivity setting for testo 826?

The emissivity is fixed at 0.95.

What is the battery life for testo 825-T2/T4?

The battery life is 20 hours for continuous operation with the laser.