As the core equipment for accurately quantifying the light environment, the comprehensive testing system for plant illumination, light, color, and electricity directly affects the reliability of plant factories, greenhouse cultivation, and plant photobiology research in terms of measurement accuracy and stability. To ensure the long-term efficient operation of the system, a maintenance system needs to be constructed from four aspects: operating standards, environmental adaptation, regular calibration, and fault prevention.

1、 Operational precautions: Standardized use, risk avoidance

1. Pre check and parameter setting

Before each use, check if the sensor probe is clean to avoid dust or condensation blocking the light path. For example, in a high humidity environment in a greenhouse, a water film is easily formed on the surface of the probe, leading toPPFDThe measured value of photosynthetic photon flux density is low. When operating, it is necessary to select the preset mode based on the plant type (such as leafy vegetable, fruit vegetable, or flower mode) to avoid manual input of parameter errors. The default red blue light ratio of the system（R:B）It needs to match the light response curve of plants, for example, lettuce cultivation usually usesR:B=4:1The tomato seedling period needs to be adjusted toR:B=2:1.

2. Environmental interference avoidance

During testing, strong light should be avoided from directly shining on the probe, and a light shield should be provided for outdoor use. For example, measuring directly under noon sunlight can result in a color temperature deviation exceeding2000KAt the same time, it is necessary to stay away from electromagnetic interference sources such as frequency converters and high-voltage power lines. A certain plant factory once caused data jumps due to voltage fluctuations caused by the testing area being too close to the fill light driver.

3. Data Collection Standards

It is recommended to control the duration of a single test within30Working continuously for a long time within minutes may cause the sensor to overheat. For example, a certain model of probe is continuously working2After hours, the red light band（660nm）Measurement value appears5%Drifting. When saving data, environmental conditions (temperature and humidityCO₂Concentration) for subsequent analysis.

2、 Daily maintenance: prevention oriented, extending lifespan

1. Cleaning and Calibration

Wipe the surface of the probe with a dust-free cloth every week and calibrate it once a month using a standard light source (such as an integrating sphere). Calibration needs to cover the entire spectral band, with a focus on verification450nmBlue light660nmRed light and730nmThe output accuracy of far red light. For example, a laboratory's failure to calibrate in a timely manner resulted in a deviation of far red light measurement values12%This has affected the research results of plant morphogenesis.

2. Storage and transportation

When the device is not in use, it should be stored in a dry and constant temperature environment（25℃±5℃）Avoid extreme temperatures in the environment that can cause circuit aging. During transportation, it is necessary to use the original shock-absorbing box. A certain model of system experienced wavelength shift in the spectrometer due to transportation collision0.8nmThe repair cost exceeds 10000 yuan.

3. Component replacement cycle

Each battery2Replace once a year (even if the displayed battery level is normal) to avoid liquid leakage and corrosion of the circuit board. Sensor filter per3Annual replacement, expired use may result in color temperature measurement errors exceeding15%A certain plant factory misjudged the color temperature of the fill light due to the failure to replace the aging filter, resulting in abnormal tomato color conversion.

3、 Emergency handling of faults: rapid response, reducing downtime

1. Data anomaly investigation

If the measured value suddenly fluctuates, first check if the probe connection wire is loose, and then verify the system accuracy with a standard light source. For example, in a certain testPPFDThe value increased abnormally, and upon inspection, it was found that poor contact was caused by oxidation between the probe and the host interface.

2. Software fault repair

When the system crashes, you can try restarting the device. If the problem persists, you need to reinstall the driver program. Communication interruption occurred after a firmware upgrade, which was resolved by rolling back to the previous version.

The accuracy of the comprehensive testing system for plant illumination, light, color, and electricity depends on scientific operation and system maintenance. By establishing“Pre check before use-In use standard-Post use maintenance”The full process management can significantly improve equipment reliability and provide solid data support for plant light environment regulation.