In smaller greenhouses, a manual system opened and closed yourself could possibly be installed. These work easiest when the screen material is backed by a track system.
Start time – when in the morning will the screen system start operation
Stop time – when in the afternoon will the display system stop operation
Light level – at what light strength will the screen end up being activated either to open or close
Maximum/Motor Gearboxes For Greenhouse minimum temperature – what are the limits of temperature desired
Maximum/minimum humidity – What are the limitations of humidity desired
Gap positions – this pieces the percent open or close position under different conditions such as early on a winter early morning to lessen thermal shock or through the summer to provide better shading. The gap steps and speed of movement can be controlled in some systems.
Time delay – under changeable climate this avoids frequent starting and closing
Wind speed – To reduce warmth loss, the screen could be closed early below high wind speed conditions
Snow detection – this can open the screen and turn on the heat when it begins to snow.
The standard system uses nylon monofilament or stainless cables to aid the screen materials. The screen material can either 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 moves the industry leading of the screen material. Control is definitely either with a manual switch or electronic controller.
Based on the above, the grower must enter the following parameters in to the controller:
A climate station is required to provide outdoor light level, temperature, humidity, wind and rain or snow conditions.