D33464 | Date 09/2018
31
Operation and control
5.5
Monitoring function
5.5.1
Temperature monitoring
The appliance is equipped with a multiple overtemperature protection in accordance with
DIN 12 880. This serves to avoid damage to the chamber load and/or appliance in case of a
malfunction:
►
electronic temperature monitoring (TWW)
►
automatic temperature monitor ( ASF)
The monitoring temperature of the electronic temperature
monitoring is measured via a separate Pt100 temperature sensor
in the interior. Temperature monitoring settings are made via the
ALARM
display. The settings made apply to all operating modes.
If temperature monitoring has been trig-
gered, this is indicated by the temperature
display: the actual temperature is high-
lighted in red and a warning symbol is
shown ( Fig. 21 ). The type of temperature
monitoring triggered (TWW in this exam-
ple) is shown beneath the temperature.
If the acoustic alarm has been activated
in menu mode (
Sound
see page 54,
indicated by the speaker symbol
in the
alarm display), the alarm is additionally
signalled by an intermittent acoustic signal,
which can be turned off by pressing the confirmation key. Information on what to do in this
case is provided in chapter Malfunctions, warning and error messages from page 37.
Before reading how to adjust temperature monitoring (from page 33), please read the
description of the individual monitoring functions here.
Electronic temperature monitoring ( TWW)
The manually set monitoring temperature
min
and
max
of the overtemperature control is
monitored by an adjustable over/undertemperature controller (TWW) of protection class 3.3
according to DIN 12 880. If the manually set monitoring temperature
max
is exceeded, the
TWW takes overtemperature control and begins to regulate the monitoring temperature (Fig.
22).
ALARM
max
38
.5°C
1.0
K
min
35
.5°C
auto
+-
TIMER
44
h
:44
m
FEUCHTE
30
%rh
22
.4°C
TEMP
Set 37
.0°C
LÜFTER
%
50
TIMER
30
m
04
h
TEMP
TWW Set 38.5
°C
42
.4
°C
TIMER
22
.4°C
TEMP
Set 37
.0°C
LÜF
TIMER
TEMP
TWW Set 38.5
°C
42
.4
°C
Fig. 21
Temperature monitoring triggered
