Overtemperature protection class 3.1 according to DIN 12880
Protection class 3.1 is standard for the CL/SL series in the Smart PRO version and optional for the CL/SL/SR ranges in the Smart version.
It has the function of protecting stored samples: the User can set the protection temperature and once exceeded, the program will turn off the heaters. When the temperature drops below the set limit, the unit will automatically resume operation.
In the figure, the dotted lines are the set limits, the solid line is the set temperature.