JULABO CF41 Cryo-Compact Circulators - Manual (Page 38)

Menu functions
38
Dynamic:
This parameter affects the temperature pattern only in case of internal control.
°C
t
aperiodic
normal
setpoint
temp. stability
°C
t
aperiodic
normal
temperature ramp
temp. stability
Possible parameters:
normal –Allows for reaching the setpoint faster,
but overshooting of up to 5 % is possible.
aperiodic – (factory setting)
Target temperature is attained without
overshooting.

With both adjustments an adequate
temperature stability is reached after
approximately the same time.
CoSpeed:
This parameter affects the temperature pattern only in case of external
control.
Possible parameters: 0 ... 5
°C
t
setpoint
5
3
0
Temp. intern
Temp. extern
During selftuning, the control parameters Xp, Tn
and Tv of a controlled system are automatically
determined and stored. Depending on the
controlled system, time for tuning can be
unequally longer. This controller layout allows
protection of sensitive objects requiring
temperature application.
As soon as a co-speed factor is set, it is
considered for calculating the control parameters.
As shown in the diagram, tuning times become
shorter the higher the co-speed factor is, but
overshooting can happen in the internal system.
Control parameters – intern / extern
The control parameters preset in factory are in most cases adequate for
achieving an optimum temperature pattern for the samples requiring
temperature application.
Each parameter may be manually set via the keypad if necessary, to allow
optimum control performance.
Setting range:
internal / external
0.1 ... 99.9 K
Proportional range >Xp<
The proportional range is the range below the selected temperature value in
which the control circuit reduces the heating power from 100 % to 0 %.