Operating instructions

Firing time in each segment is approximate and depends
on the age of elements, voltage, size of load, and the firing
speed you have chosen.
CAUTION: Cone numbers beginning with 0 are
lower in temperature than those without the 0. When
programing a Cone-Fire, be sure you know the differ
-
ence between an 05 and 5. See “Temperature Equiva
-
lents Chart for Orton Self-Supporting Pyrometric
Cones,” Appendix D, page 36.
Low Fire Cones 022 - 011
This range includes decals, over-decorations, lusters,
andgolds. The firing canbe fast.Good venting isimportant,
because oils and other organics burn off. Do not close the
lidfrom the vented position untilall odor has disappeared.
Low Fire Cones 022 - 011 Standard Schedule
Segment Rate Per Hour Time in Segment
1 396°F/220°C 2 hours
2 108°F/60°C 1 hour
Firing time is 3 to 5 hours, depending on the cone and speed.
Middle Fire Cones 010 - 01
Use this range for earthenware and commercial low-fire
glazes. Glazes fired on bisque ware (ware that has already
been fired) can be fired faster than the unfired greenware.
In this cone range, slow firings can produce poor quality
glazes.
In the Cone-Fire schedule, the firing is slowed during
the silica phase change (1063°F/573°C).
Earthenware and clays that contain ball clays, talc, and
kaolin will burn off water, carbon, and sulfur. This reduces
weight by 10%.
Cooling too fast can produce glaze pinholes, blisters,
and craters.
We recommend a 10 - 20 minute hold when firing
lead-free glazes.
Middle Fire Cones 010 - 01 Standard Schedule
Segment Rate Per Hour Time in Segment
1 324°F/180°C 2 hours, 30 minutes
2 153°F/85°C 35 minutes
3 180°F/100°C 2 hours, 40 minutes
4 108°F/60°C 1 hour, 30 minutes
Firing time is 6 to 8 hours, depending on the cone and speed.
11
Cone-Fire Programming
Use these instructions for your first firings. Later
you may prefer “Cone-Fire Shorthand Programming,”
page 40.
As the Sentry prompts for cone, speed, pre-heat,
hold, and slow cooling, valuesentered for thelast firing
will appear. To use these values again, press .
To fire without Delay or Alarm: Follow steps 1
through 7 below. Then from press .To
use Delay or Alarm, see also pages 7 - 8.
Apply power to the kiln. then will
appear. (Press if does not ap
-
pear.)
Press . will appear. Enter cone num
-
ber. (If the key does not respond, your con
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troller has Ramp-Hold only.)
Press . will appear. Enter speed:
FAST ( ), MEDIUM ( ), SLOW( ). (Medium
speed will display as .)
Press . will appear. To use
Pre-Heat(p. 12),entertime.Otherwise enter .
Press . will appear (pg 13). To
soak the ware at the end of firing, enter a hold
time. Otherwise enter .
Press . will appear (pg 13). To
use Slow Cooling, enter cooling rate as degrees
per hour. (180°F/82°C is the maximum cooling
rate. Press to turn Slow Cooling off.)
Press . will appear.
: Press . will appear. Enter
alarm temperature. (Press to turn alarm off.)
Then press .
Press . will appear. Enter
delay time. Press . (Delay zeroes out af
-
ter each firing.)
To start program, press once.
will appear, then temperature. If Delay
was programmed, will appear,then time
remaining until start. To stop the program dur
-
ing firing, press .
When program fires to completion, will ap
-
pear. Press . will appear. To shut off the
alarm when it sounds during a firing, press .