Starting from October 2025, new EVO-CO2V units include a built-in calibration function — allowing you to ensure long-term accuracy with just a few simple steps.
Even though the EVO-CO2V is factory-calibrated, environmental changes (temperature, storage time, humidity) can cause slight drift.
This manual calibration lets you easily reset it back to 400 ppm (fresh-air baseline).
🔧 Step-by-Step Calibration
1️⃣ Open the bottom screw.
2️⃣ Ventilate your car — open all windows for 10 minutes to ensure fresh outdoor air (around 400 ppm CO2).
3️⃣ Plug in the EVO-CO2V and power on your car.
4️⃣ Press the blue button on the circuit board.
5️⃣ Enter the calibration password 223344, then press 0 to confirm.
6️⃣ Wait 10 minutes — the system will automatically calibrate itself to 400 ppm.
✅ Notes for Best Accuracy
- Perform calibration outdoors or in a well-ventilated area.
- Avoid calibration near people or exhaust gases.
- Repeat every 6–12 months if you frequently use the device in closed spaces.
🌿 Why It Matters
Proper calibration ensures your readings remain accurate, stable, and reliable — whether you’re monitoring air quality in your car, RV, or truck.
From October 2025 onward, you can trust your EVO-CO2V to not only warn you of high CO2 levels, but also keep itself precise with easy in-car calibration.
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