Memmert IFP 400 - 800 Incubators (Generation 2003) - Manual (Page 28)

PERFECT page 28
The manually set monitor temperature and the electronic overtemperature protection are monitored on
PERFECT incubators by an adjustable temperature monitor (TWW) Protection Class 3.1 to DIN 12 880, or
by an adjustable temperature limiter (TWB) Protection Class 2 to DIN 12 880. The choice of temperature
monitor is selected in SETUP
(see the menu item Tolerance margin ASF in Section „Basic oven settings”)
13.2.3 Adjustable temperature monitor (TWW) Protection Class 3.1 to DIN 12 880
If the manually set monitor temperatur
MAX is exceeded, the TWW takes over the control of the
temperature and starts to control at the monitor temperature. As a warning the alarm symbol is
flashing.
TB approx. 20°C above Tmax
TWW set manually
setpoint temperature
t
°C
controller fault
emergency operation
13.2.4 Adjustable temperature limiter (TWB) Protection Class 2 to DIN 12 880
If the manually set monitor temperature
MAX is exceeded, the TWB switches off the heating permanently
and can only be reset by pressing the SET key. As a warning the alarm signal is flashing.
TB approx. 20°C above Tmax
TWB set manually
setpoint temperature
t
°C
controller fault
heating switched off by TWB