In smaller greenhouses, a manual system opened and closed yourself could possibly be installed. These work easiest when the screen materials is backed by a track system.
Start time – when each morning will the display screen system start operation
Stop period – when in the afternoon will the display system stop operation
Light level – at what light strength will the screen be activated either to open up or close
Maximum/minimum temperature – what exactly are the limitations of temperature desired
Maximum/minimum rack drive for greenhouse china humidity – What are the limitations of humidity desired
Gap positions – this models the percent open up or close position under different circumstances such as in early stages a winter early morning to reduce thermal shock or through the summer to provide better shading. The gap measures and speed of motion can be controlled in some systems.
Time delay – below changeable climate this avoids frequent starting and closing
Wind speed – To reduce high temperature loss, the screen could be closed early below high wind speed conditions
Snow detection – this can open the display screen and turn on the heat when it begins to snow.
The standard system uses nylon monofilament or stainless steel cables to support the screen materials. The screen material can possibly rest along with the network of cables or become suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that techniques the industry leading of the screen materials. Control can be either with a manual switch or electronic controller.
Based on the over, the grower must enter the next parameters in to the controller:
A climate station is required to provide outdoor light level, temperature, humidity, wind and rain or snow conditions.