78 / 341 - EN -
8.2.2.
Cooling
Upon completion of firing the controller lights all LEDs on the graphical display.
⇒
The kiln is switched off and begins to cool down on its own.
Displays during the cooling phase:
Display 1
Display 2
Description
100°C
HOT!
As long as the kiln temperature is above 40 °C, the display alternates
between display 1 & 2 every 5 seconds.
39°C
END
⇒
As soon as the kiln has cooled down below 40 °C, the display
alternates between display 1 & 2 every 5 seconds.
⇒
The firing program runs until “END” is displayed.
⇒
To return the controller to an idle condition ready for the next firing process, press the
j
key (or turn off the
power to the instrument).
8.2.3.
Recovery in the event of a power failure
•
In the event of a power failure during the firing, the controller can automatically continue the firing after the power
failure.
•
In the event of a power failure during the program delay, the start is delayed by the remaining program delay
when the mains voltage returns.
•
In the event of a power failure during the ramping, the controller continues the ramp it had been executing.
•
In the event of a power failure during the soak period, the controller goes to the soak temperature at the set
ramp rate and then carries out the remaining soak period.
•
Power fail recovery can be disabled if necessary. In the event of a power failure, the controller goes into lock
mode, switches the kiln off and “FAIL” appears on the display.
8.3.
General operating instructions
8.3.1.
Kiln too slow
• If the control unit is programmed to heat the kiln at a faster rate than the kiln is capable of then the control unit
will turn on full power and then wait until the kiln temperature has risen to the correct temperature before
proceeding to the next ramp or soak segment.
• If the control unit is programmed to cool the kiln at a faster rate than the kiln is capable of then the control unit
will apply zero power and then wait until the kiln temperature has cooled to the correct temperature before
proceeding to the next ramp or soak segment. That is, as soon as the kiln has reached the desired temperature.
8.3.2.
Heating & cooling ramps
• The control unit is capable of controlled ramps for both heating and cooling.
• The type of ramp required is determined by comparing the required soak temperature to the soak temperature in
the previous segment. The ramp is then shown during the firing on the graphical display.
•
With a normal cooling ramp, the cooling is not “active (fan cooling system)” but natural. With natural cooling, the
heat lost by the kiln is compensated for by targeted heating so that it only cools down very slowly. This
technique is usually only used in glass fusing.
•
With controlled cooling, the heat lost by the kiln is compensated for by targeted heating so that it only cools
down very slowly. This technology is used for delicate ware.
Summary of Contents for ST 630
Page 344: ...20220531 01 ...
