Instruction manual

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Ramp-Hold
Skipping a Segment in Ramp-Hold
In Ramp-Hold firing, you can skip a segment as follows:
1 The kiln is firing. Press the Up Arrow key.
2 SStP will appear. Press the Up Arrow key again.
The firing will skip to the next segment.
Controlled Cooling in Ramp-Hold
Use Ramp-Hold mode to program a slow cooling. This is
the only firing mode that can control cooling rate.
Slow cooling enhances the quality of some ceramic
glazes. Slow cooling encourages crystal development,
deeper gloss, and sometimes startling color shifts. Iron red
glazes seem to respond well to slow cooling.
For controlled cooling, program a segment to a lower tar
-
get temperature than that of the preceding segment. The
controller, of course, cannot speed cooling beyond the kiln’s
natural cooling rate.
Glass artists sometimes flash-cool the glass after it has
fused. They lift the lid slightly for a few minutes to allow heat
to escape. To flash-cool the glass, you will need to add a seg-
ment with a rate of FULL. Otherwise, after the flash-cool,
the controller will raise the temperature again.
Caution: During fast cooling, do not open the lid or
door all the way. Do not force-cool the kiln with a
fan.
The above firing would be programmed as follows:
Rate Temp.
Segment °F/°C °F/°C Hold
1 950/527 1350/732 00.12
2 FULL 950/510 00.00
3 300/166 550/287 00.00
Ramp-Hold Firing
Instructions
Note: If you don’t need all 8 segments available
in Ramp-Hold, zero out the unused segments.
See step 6 below.
1 From IdLE , press START.
2 Using the Up Arrow key (not the Down Arrow),
by-pass firing speeds or COnE and select
ProG . Then press START.
3 rA 1 will appear. Enter firing rate (tempera
-
ture change per hour) for segment 1. 1° = slow
-
est rate. 1799°F/999°C = full power. Then
press START.
4 °F 1 or °C 1 and the target temperature from
the last firing will appear. Use the arrow keys to
change the temperature. Then press START.
5 HLd 1 and the hold time from the last firing
will appear (e.g. 1 hour 10 minutes = 01.10).
Use the arrow keys to change the hold time.
Then press START.
6 Continue entering values for the segments
needed. When ra _ appears for the first seg-
ment you don’t need, select 0000. Then press
ENTER. This will zero out the remaining seg-
ments.
7 Strt will appear. Press START to begin firing.
-On- will appear, the Run indicator light with
begin blinking, and the kiln will begin firing.
To stop a firing before completion, press
START/STOP. StOP will appear, alternating with kiln
temperature.
Note: Do not be concerned if your kiln makes a
clicking sound during firing. Kilns use relays to
power the elements. The relays click each time
their electrical contacts come together.
Note: The kiln’s actual firing rate may be less
than the rate you programmed, depending on
the kiln model, available voltage, and density of
load you are firing.
When the kiln fires to completion, it will beep for 30
seconds. The display will show the following:
I
Firing time
I
Present temperature
I
CPLt
To return to IdLE , press START.