Memmert HPP 108/749 Constant climate chamber (Generation 2003) - Manual (Page 44)

44
Advanced functions
7.3.1 Electronic temperature monitoring (TWW)
Overtemperature protection
Adjustment range: -5 ... +75 °C
Setting:
Select the
MAX icon with the push-turn control.
Hold down the SET key and adjust the temperature limits with the
push/turn control.
MIN
AUTO
MAX
°C
Undertemperature protection
Adjustment range: -5 ... +75 °C
Setting:
Select the
MIN icon with the push/turn control. Hold down the
SET key and adjust the temperature limits with the push/turn con-
trol.
The lower alarm limit value cannot be set higher than the top
one. If no undertemperature protection is required, set the low-
est temperature.
MIN
MAX
°C
The manually set monitoring temperature MIN and MAX of the overtemperature control is
monitored by an adjustable over/undertemperature controller (TWW) protection class 3.3 acc.
to DIN 12880.
If the manually set monitoring temperature
MAX is exceeded, the TWW takes over tempera-
ture control and begins to regulate the monitoring temperature ( Fig. 24 ). The alarm icon
flashes as a warning .
If the acoustic alarm is switched on in the SETUP (see page 42 ), the TWW alarm is additionally
signalled by an interval sound. If the SET key is pressed, the acoustic signal can be temporarily
switched off until the next alarm event occurs.
Setting MAX
Set
temperature
t
°C
Controller error
Emergency operation
Fig. 24 Schematic diagram of how the TWW temperature monitoring functions