Memmert Universal ovens U plus, Incubators I plus, Sterilisers S plus - Manual (Page 33)

D24026 | Date 10/2014 33
Operation and control
5.5.3 Automatic temperature monitor (ASF)
ASF is a monitoring device that automatically follows the set temperature setpoint within an
adjustable tolerance band (Abb. 20).
The ASF – if switched on – is automatically activated as soon as the actual temperature value
reaches 50 % of the set tolerance band of the setpoint (in the example: 180 °C – 1.5 K) for the
first time (section A).
When the temperature violates the set tolerance band around the setpoint (in the example in
Abb. 20:
180 °C ± 3 K) – e.g. if the door is opened during operation (section B of illustration) – the
alarm is set off. The ASF alarm is automatically triggered as soon as 50 % of the set tolerance
band of the setpoint (in the example: 180 °C ± 1.5 K) are reached again (section C).
If the temperature setpoint is altered, the ASF is automatically disabled temporarily (in this
example: The setpoint is changed from 180 °C to 173 °C, section D) until the tolerance range
of the new temperature setpoint is reached again (section E).
183 °C
177 °C
ASF active
183 °C
177 °C
ASF alarm
ASF active ASF active
176 °C
170 °C
180 °C
t
A B C D E
AUTO AUTO AUTO
Abb. 20 Schematic diagram of how the ASF temperature monitoring works
5.5.4 Mechanical temperature monitoring: Temperature limiter (TB)
The appliance is equipped with a mechanical temperature limiter (TB) of protection class 1 in
accordance with DIN 12 880.
If the electronic monitoring unit should fail during operation and the factory-set maximum
temperature is exceeded by approx. 20 °C, the temperature limiter, as the final protective
measure, switches off the heating permanently.
5.5.5 Adjusting temperature monitoring
1. Press the activation key to the left of the
ALARM display. The min setting (under-
temperature protection) is automatically
activated.
Hauptschalter
>
Zu der Typenbezeichnung gibt es momentan drei Entwurfsrichtungen,
ich kann Ihnen noch nicht sagen, ob Memmert hierzu schon eine Entscheidung
getroffen hat.
Die hier gezeigt Variante, ist die von uns empfohlene Richtung.
UF 110
PLUS
ON
344
.4
444 4 .
TEMP
Set
°C
°C
FLAP
40
%
TIMER
h d
10 02
End Sept. 29 22 24
FAN
%
0
%
100
ALARM
max
444
.4°C
auto
+/- 0.0 K
min
444
.4°C
O O ON N N N O O N O
Manu
44.Sept
180
.0 °C
Set 999 .9 °C
TEMP
TIMER
End 14:45
FLAP
Holz trocknen
aufheizen
09:12h
Fr 20.10.2010 20:31
min
000°C
ALARM
0 12
%rh °C
DRAPH
off
ON
44
h
:44
m
20
%
ON
max
000 °C
auto off
99K - +
ALARM
+- 0.0 K
min
°C
auto
max
120
.0°C
60
0 .