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The controller can fire up to 8 segments per firing. One
segment is often all that is needed, though.
After the controller has finished firing the last segment,
it will turn off power to the elements.
Rate
Each segment must include a rate, which is degrees of
temperature change per hour.
The kiln will fire at full power when the rate is
1799°F/999°C. Full power displays as
Note: To select full power from
key once.
Hold
Hold maintains a steady temperature for the length of
time you specify. You can use Hold in both heating-up and
cooling-down segments.
When Hold is set to 99.59 hours, the controller will re-
main at that temperature indefinitely, until you press
. To enter a 99.59 hour Hold, press the
once from 00.00 during programming.
Note: During firing, the display shows Hold tempera-
ture and time left in Hold.
Temperature Over-Shoot
When a kiln is heated too fast, it may over-shoot the tar-
get temperature, especially in small kilns at lower tempera-
tures. To avoid this, add an extra segment in a Ramp-Hold
program to slow the firing. The segment with the slower
rate should begin approximately 40° - 60° below the target
temperature.
Repeat Firings
To repeat the last firing, press
kiln will begin firing. But first, make sure you are repeating
the correct firing by using Program Review (page 3).
Programming a
Cooling Segment
For controlled cooling, program a segment to a lower
target temperature than that of the preceding segment.
Example: You fire at a rate of 500°F per hour to 1450°F
with your first segment. You want the kiln to cool at a rate
of 100°F per hour down to 700°F. Here is how you would
program the two segments:
Segment
The first segment is the heating segment. The second
one is the cooling segment. The controller does not use mi-
nus numbers for cooling. Just enter a lower target tempera-
.
ture than that of the previous segment.
, press the
If you prop the lid or door for a fast cooling, program a
fast cooling rate for that segment. If you lower the tempera-
ture quickly by propping the lid but program a slow cooling
rate, the controller will just raise the temperature again.
Example: Some glass artists flash-cool the glass just after
it fuses. They open the door a few inches to remove heat,
then close it again. This takes the glass down rapidly
through the devitrification range. To program a flash-cool,
use maximum rate. This shuts off the heating elements dur-
ing that segment, allowing the kiln to cool rapidly.
A Ramp-Hold
Practice Program
To practice using the controller, we will enter a program
that includes three segments. The last segment is a cooling
segment.
Using the programming instructions on the next page,
enter this firing schedule. Then use Program Review (page
3) to check for accuracy.
Rate
°F/°C
1
500/277
2
100/55
Note: During fast cooling, do not open the door all the
way. Do not force-cool the kiln with a fan.
from
. The
Temp.
°F/°C
Hold
1450/788
00.00
700/371
00.00
7
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