The temperatures T1 and T2 are measured during the heating process. The difference between
these two temperatures is calculated continuously. If the difference is larger than the temperature
set under "ΔT switch off", the heating process switches off or pauses.
When the process is paused, the screen indicates "ΔT pause".
If "Auto restart" is not active, the heating process will not restart automatically and has to be
restarted manually.
If "Auto restart" is active, the heating process will restart automatically as soon as the temperature
difference is smaller than the temperature set under "ΔT switch on". This must be achieved within
the "ΔT timeout" time. If this is not the case, the error message "ΔT timeout" is displayed, which can
be reset by pressing "CLEAR".
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