| Mistake | Manual’s Warning (paraphrased) | Consequence | | :--- | :--- | :--- | | Not matching the CO₂ analyzers before logging data | "The reference and sample cells must be matched (<0.5 ppm difference) before each measurement." | Negative photosynthesis values or high noise. | | Running the system with a clogged soda lime tube | "Replace soda lime when color changes from white to violet. Bypassing or ignoring this damages the IRGA." | CO₂ readings drift, slow response time. | | Closing the cuvette without a leaf or blank | "The cuvette must contain a leaf or a zero (dark empty) condition. Measuring empty cuvette with light leads to erroneous A values." | Apparent "photosynthesis" of air. | | Using the internal light source at >2000 µmol m⁻² s⁻¹ for more than 10 minutes | "Extended high-intensity LED use may overheat the cuvette head. Activate fan boost in the manual control menu." | Thermal damage to leaf and Peltier element. | | Ignoring the gas flow rate (typically 750 µmol s⁻¹) | "Flow rate influences boundary layer conductance. Change only if you recalculate gsw using formulas from Chapter 9." | Incomparable stomatal conductance data. |
The details several critical steps to ensure data integrity and instrument longevity. 1. Pre-Flight Calibration gfs-3000 manual
Enables data recalculation for different leaf areas or weights after measurement. Maintenance & Calibration | Mistake | Manual’s Warning (paraphrased) | Consequence