15Operator panel and displayA Main switch (left « on, right « off)B Adjustable safety circuitC Rotating / pressing knob - TemperaturesettingD Rotating / pressing knob - Speed settingE “Menu“ buttonF “Timer“ buttonG “Lock“ buttonH Display/// Operator panelI Standby LEDJ Power socketK USB InterfaceL RS 232 InterfaceMConnection for PT 1000 temperaturesensor series, temperature probes orcontact plugsN Heating plateO Threaded hole for standNOIHCE F G B A DJ K L M