Electronic Temperature Monitoring (Tww) - Memmert UN PLUS Series Operating Instructions Manual

If temperature monitoring has been
triggered, this is indicated by the
temperature display: the actual tempera-
ture is highlighted in red and a warning
symbol is shown ( Fig. 16 ). The type
of temperature monitoring triggered
(TWW in this example) is shown beneath
the temperature. If the acoustic alarm
has been activated in the
(see page 45 ), which is indicated by the
speaker symbol
the alarm is additionally signalled by an
intermittent acoustic signal. Information on what to do in this case are provided in the
chapter "Malfunctions, warning and error messages" from page 34.
Before reading how to adjust temperature monitoring (from page 31), please read the descrip-
tion of the individual monitoring functions here.
5.5.1 Electronic temperature monitoring ( TWW)
The manually set monitoring temperature
control is monitored by an adjustable over/undertemperature controller (TWW) protection
class 3.3 acc. to DIN 12 880 (or over/undertemperature controller (TWW) protection class 3.1
for UIS appliances). If the manually set monitoring temperature
takes over temperature control and begins to regulate the monitoring temperature (Fig 17 ).
°C
Fig. 17 Schematic diagram of how the TWW temperature monitoring works
Signals
menu
in the alarm display,
TEMP LÜFTER
195
.4 °C °C °C
TWW Set 190.0
0 °C 0 °C °C
TIMER FLAP
LUFTKLAPPE
04 30
44 :44
h m
h m
Ende 23.11. 13:30
End 14:45
Fig. 16
Temperature monitoring triggered
min max
and of the electronic overtemperature
Emergency operation
Controller error
Operation and control
TEMP
TEMP
TEMP
195 23
180
0
%
Set 180
TWW Set 190.0 Set 185
40
20
% %
max
is exceeded, the TWW
Setting MAX
Set
temperature
t
.2 °C
.4 °C
.4 °C
.0 °C
.0 °C °C
29