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BD / BF / ED / FD / FED (E3.1) 03/2019 page 48/106
9. Ramp function
9.1 General information
You can program temperature ramps in order to extend heating up times. This may be necessary in some
cases to prevent temperature stress 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. When the ramp function is turned off, the chamber will heat up with its maximum heating capacity.
The entry 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 ramp proceeds from a previously entered set-point to a new, higher one. The temperature must be
equilibrated to the start set-point. Perform the setting in the following 3 steps:
1. Enter the temperature set-point as start ramp set-point and let the temperature equilibrate to this
value
2. Define the temperature increase (ramp gradient) in °C/min or in °F/min in the setting menu “Ramp
function”
You can select a gradient from „0.0“ up to „1.0“ or from „1“ up to „10“ according to the chamber type.
When setting the gradient to „0.0“ or „0“, ramp function is turned off. The chamber will then heat up
with its maximum heating capacity.
The chamber will try to heat up according to the entered gradient, i.e. with a speed of xx degree per
minute. A heating-up rate of 0.4 °C/min for the incubators BD and BF resp. 4 °C/min for the heating
and drying ovens ED, FD and FED can be regarded as a realistic maximum.
3. Enter the target ramp set-point in the “ramp function” setting menu.
As soon as the entries have been adopted, the ramp function is activated. The chamber heats up with the
entered gradient, if the set ramp target value lies above the actual temperature value.
During ramp operation the effective ramp set-point continually rises in accordance to the entered gradi-
ent from the previously entered set-point to the new one. The actual value follows this continually chang-
ing effective ramp set-point. As soon as the ramp target value is reached, this temperature is maintained
constant.
The actual temperature value, the selected gradient, and the target value are shown in Normal display.
The effective ramp set-point can be seen through the temperature set-point function.
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