Sentry Industries Sentry 2.0 - Manual (Page 7)

Setting Alarm From Idle
1 From IdLE , press 7. ALAR will appear alternating
with the last alarm temperature entered.
2 Enter alarm temperature. Press ENTER. IdLE will
appear. (Enter 0000 to turn alarm off.)
Note: 9999, as an alarm temperature, automati-
cally changes to the maximum temperature rating
of your controller.
When the alarm sounds, shut it off by pressing any key ex-
cept STOP. (The STOP key does not work while an alarm
sounds.) If the alarm sounds as soon as firing begins, it is be-
cause the alarm was set to a temperature below the current
temperature.
Setting Alarm During Firing
1 The alarm beeps while the kiln is firing. Press 7.
2 Enter the new temperature.
3 Press ENTER. The kiln will continue firing.
If you touch 7, enter a new temperature, and forget to
press ENTER, the controller will merely continue firing.
Note: When an alarm sounds, firing to completion
does not shut the alarm off.
9 / Cone Numbers
& Skip Segment
Cone Table
Look up a cone temperature with the 9 key.
1 From IdLE , press 9. CONE will appear, then the
cone, if any, currently programmed in Cone-Fire.
2 Enter a pyrometric cone number. Press ENTER. The
display will show the cone temperature. If you enter a
non-existent cone number, the display will show
CONE , ready for you to enter a different cone num-
ber.
Note: Do not be concerned if the actual cone
shut-off temperature does not match the Cone Ta-
ble. The temperature of a cone varies with firing
speed. The cone temperatures in Cone Table are
for self-supporting cones fired at a rate of 108°F /
60°C per hour during the last hour of firing.
Skip Segment
Skip Segment works only during firing. It jumps from the
current segment to the next one.
To skip a segment, press 9. SKIP will appear, then the
current segment. Press ENTER. (If you change your mind
and don’t want to skip that segment, don’t press ENTERafter
SKIP appears. Instead, press 9 again. The firing will con-
tinue in the same segment.)
Skip Segment in Cone-Fire
In Cone-Fire, Skip Segment works in Pre-Heat and Hold:
■ To skip out of Pre-Heat and begin the cone firing.
■ To skip out of Cone-Fire Hold. Slow Cooling will begin.
(If the firing does not include Slow Cooling, Skip Seg-
ment will not end a Hold. Press STOPto end the firing.)
Skip Segment in Ramp-Hold
In Ramp-Hold, the firing will skip to the ramp of the next
segment from either a ramp or hold of the current segment.
(See page 12 for details on ramps, holds, and segments.)
Skip Segment Examples
For additional examples, see Chapter 4, pages 14 - 15.
Cone-Fire
■ In Cone-Fire you are firing to an 05 witness cone for the
first time. You select cone 04 with a 60 minute hold and a
slow cooling. After 30 minutes in hold, the 05 witness
cone bends to maturity. Use Skip Segment to end the
hold and begin Slow Cooling.
Note: Once you know how much hold time will
bend the witness cone, program that much hold for
the next firing.
Ramp-Hold
■ Skipping to a Cooling Segment: You have programmed
2167°F for a cone 5 glaze firing, followed by a segment for
controlled cooling. Watching the witness cone through
the peephole, you notice that cone 5 is bending at 2150°F.
Use Skip Segment to end the firing segment and begin
the one for slow cooling.
Note: Make a note of the temperature at which the
cone bent. Program that temperature for the next
firing.
■ Skipping to a Hold: Skip Segment does not skip from a
ramp to a hold. It skips to the next segment. If you need to
skip to a hold, program an additional segment with the
hold that you want. Then skip to that segment. Example:
Segment 1: rate 500°F to 1828
Segment 2: rate 200°F to 1750 with 30 minute hold
Enter/Start
■ Press ENTERafter each step in program-
ming a firing.
■ Press ENTER once to begin firing.
The Options Key
See Chapter 6, page 17.
The Stop/Back Key
You can stop a firing at any time (except
when the alarm sounds) by pressing STOP.
If you inadvertently enter Ramp-Hold,
Cone-Fire, or Options, you do not have to go through all the
prompts to get back out. Press STOP to go to IdLE .
The STOP/BACK key is also like the Back button on an
Internet browser. It works in Cone-Fire and Ramp-Hold
programming. It will take you back one step every time you
press the key.
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