Memmert TTC Temperature test chamber additional accessories (Generation 2003) - Manual (Page 4)

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Supplement to Operating Instructions CTC/TTC
1.5 Attachment of the freely positionable temperature sensor
If the freely positionable temperature sensor is not required for measurement of the chamber
load, it can be attached to the clamp in the back of the interior.
If the additional, freely positionable PT100 temperature sensor is plugged off or defective,
„- - -“ is displayed in the settings under „SENSOR 1“.
1.6 Programme recommendation for faster temperature
adaptation of the chamber load
Theoretically, the temperature of the chamber load is adapted to the chamber temperature
according to an exponential function. This means that the adaptation of the temperature of
the test object to that of the chamber may take a while in case of a heavy test object and/or
high specific heat capacity.
1.6.1 Cooling down process
To accelerate the cooling down process, it is recommended to set a lower chamber tempera-
ture until the chamber load has reached the desired temperature. Afterwards, the chamber
temperature is set to the desired test temperature.
Programming example:
Quickly cooling down the core temperature of a test object to -20 °C. The ambient tempera-
ture is set to -24 °C until the temperature of the test object has reached -20 °C. ASF tolerance
setting: ± 4 K.
Ramp Time Temperature Fan Rh Cond
1 0:01 –24 °C 100 % off Spwt(T)
2 0:01 –20 °C 100 % off Next
3 1:00 –20 °C 100 % off Next
+20 °C
–20 °C
–24 °C
Temperature in the test chamber
Temperature of the test object
ASF tolerance band