Hold Function With just the press of the Hold button, you can capture the current readings for both PPFD (Photosynthetic Photon Flux Density) and DLI (Daily Light Integral), helping you to record more effectively. MAX/MIN/AVG Function This feature allows you to monitor key data points: the highest, lowest, and average values for PPFD and DLI, helping you make informed adjustments during your photosynthesis analysis. Log Function Simply press the LOG button to save your current PPFD and DLI readings, making it easy to review past measurements. The device can store up to 100 historical data entries. Q: Why are my readings inconsistent with the PAR Meter? A: Variations in readings can be caused by several factors such as light source instability, environmental conditions, and measurement distance. To ensure consistent results, make sure the light source is stable, calibrate the meter properly, and measure at a consistent distance. Taking multiple measurements in different areas can also help obtain more accurate results. Q: Why do my PAR meter readings seem inaccurate? A: The accuracy of your readings may be affected by environmental factors like the distance from the light source, the angle of the light, and the light intensity. Ensure that the device is used under similar conditions and follow the calibration steps in the manual to ensure accurate results.