Memmert ICH/ ICH L Climate chambers - Manual (Page 32)

32 D30381 | Date 10/2014
Operation and control
Electronic temperature monitoring ( Electronic temperature monitoring (TWW) TWW) Electronic temperature monitoring ( Electronic temperature monitoring ( Electronic temperature monitoring ( Electronic temperature monitoring (
The manually set monitoring temperature min and max of the overtemperature control is max max
monitored by an adjustable over/undertemperature controller (TWW) protection class 3.3 acc.
to DIN 12 880. If the manually set monitoring temperature max is exceeded, the TWW takes max max
over temperature control and begins to regulate the monitoring temperature (Fig. 18).
t
°C
Setting MAX
Set temperature
Controller error
Emergency operation
Fig. 18 Schematic diagram of how TWW temperature monitoring works