Low temperature light incubator is a core equipment in fields such as plant tissue culture and microbial research. However, the following five operations may directly lead to experimental failure or data distortion and should be strictly avoided:
Taboo 1: Frequent opening and closing of the box door can cause severe fluctuations in temperature and humidity
Risk: The low-temperature light incubator simulates a specific environment through precise temperature control and humidity regulation. Frequent opening and closing of the incubator door can cause the internal temperature to fluctuate by more than ± 2 ℃ within 5 minutes, and the humidity to decrease by 10% -15%, disrupting the stability of plant callus differentiation or microbial growth.
Suggestion:
Plan the sampling time in advance and conduct centralized operations;
Use transparent observation windows or built-in cameras to remotely monitor growth status;
When it is necessary to open the door, shorten the single operation time to 30 seconds.
Taboo 2: uncalibrated sensors, parameter loss of control
Risk: A temperature sensor deviation of 1 ℃ may result in opposite experimental results.
Suggestion:
Calibrate equipment monthly using standard thermometers and illuminance meters;
Record calibration data and archive it to form a traceable quality system.
Taboo 3: Sample placement too dense, obstructing airflow circulation
Risk: The low-temperature light incubator relies on axial flow fans to achieve uniform temperature and humidity distribution. If the sample is too dense, it will form a "heat island effect", causing local temperatures to be 2-3 ℃ higher than the set value and humidity to be 15% lower, leading to sample contamination or abnormal growth.
Suggestion:
Sample spacing ≥ 5cm, avoid blocking the fan outlet;
Use culture containers with good breathability;
Regularly check the operation status of the fan and clean the dust.
Taboo 4: Switching conditions directly without setting a temperature transition section
Risk: Switching directly from high temperature to low temperature may cause compressor overload, frequent start stop and shorten equipment life, and may also cause sample cold damage.
Suggestion:
Use multi-stage program temperature control, with a temperature change rate of ≤ 1 ℃/min in each stage;
Simulate natural circadian rhythms and set gradient cooling/heating curves.
Taboo 5: Neglecting defrosting maintenance can lead to a decrease in cooling efficiency
Risk: When the low-temperature light incubator is in cooling mode, the evaporator will frost. If the frost layer thickness exceeds 3mm without regular defrosting, the cooling efficiency will decrease by 30%, resulting in increased temperature fluctuations inside the incubator and reduced experimental repeatability.
Suggestion:
Defrost every 7-15 days of operation (set to run at 40 ℃ for 3 hours);
Clean the condenser dust to maintain heat dissipation efficiency;
Record defrosting time and create maintenance logs.