Memmert PM 200/400/500 Pump Module (Generation 2003) - Manual (Page 32)

VO page 32
23 Temperature monitor and protection devices
The monitor temperature is measured with the Pt100 temperature sensors in the heating trays.
The monitoring system serves as protection for the oven load and protects the oven and its surroundings.
The oven is provided with duplicate overtemperature protection (mechanical / electronic) according to DIN 12 880.
MIN
MAX
AUTO
°C
23.1 Mechanical temperature monitor: temperature limiter (TB)
All ovens of the VO series are equipped with a mechanical temperature limiter (TB) Protection Class1 to
DIN 12 880.
If the electronic monitor system should fail during operation and the fixed factory-set maximum temperature
is exceeded by approx. 20°C the temperature limiter switches off the heating permanently as a final
protective measure. The alarm symbol lights up as warning
Fault rectification after the TB cut-out has been activated:
1.
Switch off the oven and allow it to cool down
2. Rectify the fault (e.g. replace temperature probe) and where appropriate contact customer service
3. The oven is again ready for operation only after it has cooled down and after the fault has been
rectified
Overtemperature
protection
(TWW, TWB)
Undertemperature protection
Audible
alarm signal
Automatic
temperature monitor
(ASF)
visual alarm symbol
alight: TB alarm
flashing:
TWW alarm
TWB-alarm
ASF-alarm