Ultimate-cell Stackable Shaking Incubator V2017.234a maximum of 80%RH can be achieved. The setpoint of humidity must be reduced toavoid further formation of condensation.The occurrence of condensation is indicating that the maximum humidity is reached,the relative humidity setpoint must be reduced.The water tank is supplied with the equipment. You can hang it on the side of the unit.Alternatively, you can use your own water tank.Only use recommended types of water for humidification. Using tap water for hu-midification, may cause lime scale problem inside the system and the chamber.6.7 Operating the CO2 SystemThe CO2 system features NDIR CO2 sensor for concentration measurements, and aclear PVC curtain for minimizing the CO2 gas escaping during door openings. Thecurtain has Velcro hook and loop fasteners on the upper front edge of the chamber toattach the curtain, and multi slits to facilitate handling of the shaking tray.The CO2 system only operates under Fixed Value control mode. It will automaticallyswitch off when the control mode is switched to Programmable mode.Under Fixed Value control mode, the CO2 concentration level can be set via the 6.4Operating Temperature and Speed System --Fixed Value ModeThe accuracy of CO2 concentration value is 0.1%RH.To prevent excessive consumption of CO2 gas, the drain holes, sample port, frontdoor must keep closed.6.8 Setting Defrosting CycleThis unit is equipped with automatic defrosting function. When the incubator is set torun at lower temperature set point, proper settings of defrosting cycle will optimize theperformance in long term operation.When the defrosting cycle is running, the circulating fan stops running, and controlsystem activate the defrosting cycle.