Orton AutoFire Plus User Manual page 18

AutoFire® Kiln Controller
oFSt - Cone Offset
The oFSt feature enables the user to adjust or calibrate the preset cone programs, without changing to a
different cone number. This is useful when the kiln does not properly bend the desired witness cone. This is
common when using Type K thermocouples that drift with repeated firings.
hotter than shown on the display. This feature may also be useful to compensate for the location and condition
of the thermocouple.
The Cone Offset or calibration feature allows the operator to specify a different temperature offset for each the
three preset cone programs. This may be necessary since the same offset needed for a low temperature firing
may not work for a higher temperature firing. The offset is applied to the appropriate preset cone programs, not
to user programs.
The user must first select the preset cone program (Lo Fire, Mid Fire, or Hi Fire) by selecting a Cone
Number before assigning a Cone Offset.
Cone Offset is then selected from the following list:
Setting (° ° F)
0 F
5 F
10 F
15 F
20 F
-6 F
-13 F
-26 F
-38 F
The Cone Offset adjustment is a permanent change to be applied to all future firings when the preset cone
program (Lo Fire, Mid Fire, or Hi Fire) is selected. The value is saved in memory. Each preset cone
program can have its own unique Cone Offset.
CtbL - Cone Table
The CtbL (Cone Table) feature allows the user to determine the deformation temperature corresponding to a
selected cone number. Deformation temperatures are for a 60°C/hour (108°F/hour) rate. The default is cone
06. It is changed using the arrow keys.
ALAr - Kiln Temperature Threshold Alarm
(disabled)
The ALAr feature enables the user to specify a kiln temperature at which an alarm will be sounded and
displayed. The alarm occurs when the kiln temperature is equal to or greater than the programmed kiln
threshold temperature. It remains active until the user acknowledges the alarm by pressing the ENTER key.
The alarm is disabled when 0000 is set in the display.
Setting (° ° C)
0 C
3 C
6 C
8 C
11 C
-3 C
-7 C
-14 C
-21 C
Default Setting: 0° ° C, 0° ° F
Description
No adjustment in heatwork
Increases heatwork
Increases heatwork
Increases heatwork
Increases heatwork
Decreases heatwork
Decreases heatwork
Decreases heatwork
Decreases heatwork
Default Setting: 06
Default Setting: 32° ° F or 0° ° C
User's Guide
It is common for the kiln to be
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