Operating instructions

Repeat
Firings
To repeat the last firing,
press from .
The kiln will begin firing.
Make sure you are repeat
-
ing the correct firing by us
-
ing Program Review (next
page). For repeat firings
that you don’t want to inad
-
vertently change, see Pro
-
gram Lock, page 18.
Program Review
When you press to begin firing, the controller
will fire the program that is in active memory. Program Re
-
view shows the values for that program. The program in ac
-
tive memory is—
I
The program that was fired last, or
I
The program that was selected since the last firing.
Start Program Review from , or while firing, by
pressing
.
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. Then 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:
Rate Temp.
Segment °F/°C °F/°C Hold
1 500 / 277 1450 / 788 00.00
2 100 / 55 700 / 371 00.00
The first segment is the heating segment. The second
one is the cooling segment. The controller does not use mi
-
nus numbers for cooling. Justenter a lower target tempera
-
ture than that of the previous segment.
Ifyoupropthelidor
door for a fast cooling, pro
-
gram a fast cooling rate for
that segment. If you lower
the temperature quickly by
propping the lid but pro
-
gram a slow cooling rate, the
controller will just raise the
temperature again.
Example: Some glass art
-
ists flash-cool the glass just
after it fuses. They open the
door a few inches to remove
heat, then close it again.
Thistakestheglassdown
rapidly through the
devitrification range. To
program a flash-cool, use a
rate of 9999. This shuts off
the heating elements during
that segment, allowing the
kiln to cool rapidly.
Note: During fast cool
-
ing, do not open the door
all the way. Do not
force-cool the kiln with a
fan.
Note: See Temperature Deviation (TEdE), page 17,
for information on error codes that may appear during
“crash” cooling. To turn these codes off, program a
crash cooling rate of 9999. This turns off TEdE error
codes only for that particular segment. The TEdE
codes still work on the hold and the other segments.
Suppose you enter a cooling rate that is faster than the
kiln can cool? Depending on the rate you enter, you may
get an alarm message. (Press
to turn off the alarm.)
CPLT Message: Firing
Completed
When the firing has success-
fully completed, the Sentry will
shut off power to the elements.
Then four messages will cycle
oneaftertheother:
(complete)
Firing time in hours and minutes
The temperature reached during the last segment
The current kiln temperature
Note: Afterthekiln fires to completion, disconnect the
power. It is okay to turn off the power to the controller
while the kiln cools to room temperature.
Note:
(See
page 18 to find software version) If appears im
-
mediately after you press
, it is because all pro
-
grammed temperatures are lower than the current kiln
temperature. If the alarm sounds (see page 12), and
then the kiln fires to completion, you will see in
-
stead of . Press . will appear.
9
It is easy to pro
-
gram a con
-
trolled cooling.
Simply enter a
target tempera
-
ture that is lower
than that of the
previous
segment.
If you repeat the
same firing pro
-
gram often, use
Program Lock so
that it cannot be
inadvertently
changed. See
page 18.
CPLT means the
kiln has fired to
completion and
the heating ele
-
ments are turned
off. To make
IdLE appear,
press any key.