Instruction manual

4 Cone-Fire / Ramp-Hold
Power Failures
After a power failure, the controller will continue firing
provided that:
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The kiln temperature is above 212°F / 100°C when the
power comes back on.
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The temperature dropped no more than 180°F / 100°C
while the power was off.
Power Failure Messages
The power failed during a cooling segment, and
the kiln cooled past the target temperature while the power
was off.
The power failed during firing and kiln tempera
-
ture was below 212°F / 100°C when the power came back
on.
The power failed during firing and temperature
dropped more than 72°F / 40°C by the time the power came
back on.
CPLT Message: Firing
Completed
When the firing has successfully completed, the Sentry
Xpress will shut off power to the elements and sound an
alarm for 30 seconds. Then three messages will cycleone af-
ter the other:
(complete)
Firing time in hours and
minutes
The current kiln temperature
Adverse Weather
It is okay to store the controller at sub-zero tempera-
tures. But before operating, raise the room temperature to
at least 32°F / 0°C. Place a space heater within a couple of
feet of the control panel and let the heater run for an hour
or so. Or hang a shop light near the kiln to raise the temper
-
ature.
Thunder Storms and Power Surges
Unplug the kiln or disconnect the power when the kiln is
not in use, especially during thunder storms and in areas
with frequent power surges. If the kiln is part way through a
firing when a storm begins, it is probably okay to continue
the firing with close supervision. Do not leave the kiln unat
-
tended.
Canceling a New Program
If you do not touch the keys for one minute during pro
-
gramming, the controller will go back to the display.
The controller will also discard the program you were en
-
tering and will retain the previous program in memory.
This is useful if you change your mind during program
-
ming and decide to keep the previous program. Instead of
completing the new program, wait a minute and let the con
-
troller return to .
Scrolling Numbers Rapidly
During programming, hold an arrow key down several
seconds, and numbers will begin to scroll rapidly. Ordi
-
narily, you would press to raise a number and
to lower it. But sometimes it is faster to press
the opposite key. This is because the numbers scroll below
0000 to the highest number, and vice versa. Examples:
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To program a 99.59 hour Hold when the display shows
00.00, press the once.
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To program a FULL rate when the display shows 0000,
press the once.
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To program a temperature of 200°F when the display
shows 1800°F, press the . That is faster than
pressing the .
Program Review &
Repeat Firing
Program Review lets you check that the information
programmedinto the controlleris correct. Program Review
shows the values for the program in active memory. Use
Program Review from to repeat the last program you
fired.
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Press the
key. The rate, temperature, hold, etc. will
display one after the other. Firing will continue.
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Press the key. After rate, tempera-
ture, hold, etc., will appear. Press .
will appear, and the kiln will begin firing the program
just reviewed.
Delay
Delay is a count-down timer. The kiln begins firing when
the timer runs out of time. Use delay to fit a firing into your
schedule.
CAUTION: For safety,donot leave the kiln alone dur
-
ing a delay or a firing. We cannot guarantee your kiln
against overfiring even though the controller is auto
-
matic.
After you have selected a program and the control
-
ler is ready to begin firing, will appear.
Press the key once. will ap
-
pear, alternating with .
Use the arrow keys to enter delay time. (The deci
-
mal separates hours and minutes. Example: 1 hour
and 10 minutes = 01.10) Then press twice.
will appear, alternating with time left until
the firing begins.
Note: Press during delay to end the delay and
begin the firing. The maximum delay is 99 hours and
59 minutes.