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BD / ED / FD (E2) 03/2019 page 24/68
6.4.2 Entering a temperature ramp
You can program temperature ramps in order to extend heating up times. This may be necessary in some
cases to prevent temperature stresses in the material during the heating up phase. Temperature ramps
should only be used if required. Using them may result in considerably slowing down the heating up
times.
The entry in °C/min or in °F/min means the nominal value gradient and limits the maximum temperature
increase to this value. Due to the heat and evaporation energy assumed by the drying material, smaller
temperature gradients may also result.
A temperature ramp proceeds from a previously entered set-point to a new one. The temperature must be
equilibrated to the start set-point. Perform the setting in the following 3 steps:
1. Enter the set-point of the ramp start temperature. Let the temperature equilibrate to this value.
2. Set the ramp to the desired gradient. You can select a gradient from 0.0 °C/min up to 1.0 °C/min (BD),
resp. from 1 °C/min up to 10 °C/min (ED, FD).
A heating-up rate of 0.4 °C/min (BD) resp. 4 °C/min (ED, FD) can be regarded as a realistic maximum.
3. Enter the set-point (target ramp temperature).
Set a ramp gradient only if required. The setting “0” means “ramp function turned off”. The chamber will
heat up with its maximum heating capacity.
1. Press down button for approx. 5 seconds.
The display alternately shows “unit” and the temperature unit:
2. Press again button .
The display alternately shows “rASd” and the actual setting of the set-point gradient:
3. Set the desired ramp gradient with buttons (set-point gradient in °F or °C acc. to the
selected setting, see chap. 6.4.1).
4. The set value is automatically adopted after 2 seconds.
During ramp operation the actual set-point (SPr) continually rises in accordance to the entered gradient
from the previously entered set-point to the new one (SP). The actual value follows he set-point value.
About set-point display during ramp operation see chap. 6.2.
6.4.3 Chamber addressing
If several incubators BD or drying and heating ovens ED (option) are networked with a PC via the APT-
COM™ 4 Multi Management Software (option, chap. 8.2), each chamber must be allocated a unique
address. Addressing takes place on the chamber controller as follows:
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