26
Threshold Alarm
During the firing, it is possible to set an audible alarm and display alarm for when the
actual temperature reaches a specified value. The buzzer will sound (for 30 seconds)
and the display will show the alarm code
ALAr.
To set the alarm, Press Increase button during the active firing until the alarm prompt
ALAr
is displayed. Then Press the Program button to display the current alarm
temperature setting. Adjust the temperature setting with the Increase or Decrease
buttons. Then Press Program button to return to the normal firing mode. If the Decrease
button is pressed while the
ALAr
prompt is displayed, the controller display returns to
the normal firing mode.
The alarm is disabled (turned off) when the alarm value is set to 32°F (0ºC). The alarm
value can be reset or changed many times during a single firing. To silence an active
alarm, simply press any button. The maximum programmable value for the alarm is
2400ºF (1316ºC). If the controller does not allow you to program alarm temperatures up
to 2400°F/1316°C, it has been factory set by the supplier to a lower safety temperature.
This is often necessary to limit the controller to the maximum operating temperature of
the system.
Flow Diagram for Options Menu
Power Fail Recovery
A firing will resume after a power interruption if certain conditions are met.
1. The controller was not performing a cooling step and the cooling temperature
was not exceeded. If so, the display will show the alarm code
PF 1
and terminate
the firing.
2. When power is restored the actual temperature must be above 212ºF (100ºC). If
not, the display will show the alarm code
PF 2
and terminate the firing.
