User Manual MKA 500 / MKA 800
Conforms to
Issue 21.02.2023_01 Page 15
4.3 Nominal temperature
Nominal value for chamber temperature control. The chamber temperature is regulated via the
heating relay (
when the actual value is smaller than the nominal value
) and/or cooling relay
(
when the actual value is higher than the nominal value
).
If two nominal values, „Chamber min“
and „Chamber max“, have been enabled for temperature control, the heating process will use
nominal value „
Chamber min
“ and the cooling process will use „
Chamber max
“.
Be aware
Temperature control with low pressure steam via humidifying:
The t
emperature is controlled with low pressure steam and not through heating. Low
pressure steam is blown into the chamber via the humidifying valve with 2 Point behaviour.
Activation of temperature control with low pressure steam via humidifying:
Enter value 100 as the min. value for humidity (transiently or in programming mode).
This function is only available, if it has been enabled by the service technician!
4.4 Nominal core temperature
Be aware
Shut-down condition:
If you have enabled the nominal core temperature value in a step and the core sensor
reaches this nominal value, the step will be terminated
.
The controller works with two types of core shut-down:
Positive core shut-down (heating operation)
If the pre-programmed nominal temperature value is higher than the nominal core
temperature value, the controller will switch to the next step as soon as the actual core
temperature is higher or equal to the nominal core temperature.
Negative core shut-down (cooling operation)
If the pre-programmed nominal temperature value is lower than the nominal core
temperature value, the controller will switch into the next step. When the actual core
temperature is lower or equal to the nominal core temperature, the controller will also switch
into the next step.
4.5 Step time
The step time is the duration of a step.
Entering a step time
While a step is running, the step time is counted backwards. When the pre-programmed step
time has elapsed, the controller will switch into the next step.
Be aware
No pre-set step time:
If you have not entered a step time, the time will be counted forward while the step is
running. (
in this way you always know how long the step has been in operation).
4.6 Optional nominal values
A service technician can make further nominal values available by changing the configuration of
the controller. The relevance of these nominal values can vary, this is why your service
technician should explain them to you. The following description is just a list of possible
applications.
