**irrLog — Professional IRR2-BT Measurement Logging for Android**

Turn your IRR2-BT into a connected field measurement and documentation workflow.

Connect directly via Bluetooth, monitor irradiance, temperature, inclination and orientation in real time, and record complete measurement sessions directly on your Android device.

Designed for solar PV installers, inspectors, commissioning engineers and measurement professionals who need reliable field data without unnecessary complexity.

**Key Features**

• Direct Bluetooth connection to compatible IRR2-BT devices
• Live irradiance, temperature, inclination and orientation
• Configurable logging intervals: **1, 5, 10 or 30 seconds**
• Continuous session recording with precise timestamps
• Automatic reconnection after temporary Bluetooth signal loss
• Sample & Hold functionality to maintain logging continuity during brief data interruptions, with clearly identified held values
• Measurement-quality indicators and session summaries
• CSV export for documentation, reporting and further analysis
• Demo Mode — explore irrLog without physical hardware
• Available in 16 languages
• Offline measurement, logging and CSV export
• No account required
• No advertisements or analytics
• Measurement data stored locally on your device

**7 Days Free — Then One-Time Purchase**

Try irrLog free for 7 days with a compatible IRR2-BT device.

Your trial begins only after your first successful connection to a real device. Exploring Demo Mode does not start the trial.

No credit card, subscription or automatic renewal is required.

After the trial, unlock Full Access with a **single, one-time purchase**.

Pay once. No recurring subscription fees.

**Built for Real Field Work**

irrLog was originally developed to solve a practical problem: capturing reliable IRR2-BT measurement data in the field without accounts, cloud services or complicated workflows.

What started as a tool for my own professional work has evolved into an application designed for other solar and measurement professionals.

Every update focuses on practical improvements, reliable data collection and efficient documentation.

irrLog is independently developed and maintained by a small business. Feedback from professionals using the application in real-world conditions directly influences future development.

**Independent Application**

irrLog is an independent third-party application and is not affiliated with, endorsed, sponsored, certified or developed by Fluke Corporation.

Fluke, IRR2-BT and related trademarks remain the property of their respective owners. References to IRR2-BT are used solely to identify device compatibility.