General Guidelines
Time and Temperature Display
Center Dot: Time
A center dot appears during
time display. It separates hours
from minutes (i.e. 1 hour, 30
minutes displays as 01.30).
During temperature display, the
dot disappears.
Right-Hand Dot:
°
C
When temperature is dis-
played in °C, a dot appears in
the lower right. In °F display,
it disappears. You can choose
between Fahrenheit and
Celsius display. See page 9.
Operation Begins from the IdLE Display
IdLE
must appear before you can fi re the kiln
If
CPLt
,
STOP
, or other message appears instead of
IdLE
when the kiln is fi rst turned on, press the
START/
STOP
key (the key with the circular arrow).
IdLE
will
appear.
If you press the
START/STOP
during a fi ring,
STOP
will appear. To get back to
IdLE
, press
START/STOP
again.
If the display shows an error message such as
FaIL
instead of
IdLE
, see page 9.
CPLt
(fi ring completed ) appears at the end of a
fi ring. To make
IdLE
appear, press
START/STOP
.
Thermocouple Inspection
The small rod protruding into the firing chamber is the
temperature sensor, or thermocouple.
CAUTION:
Bumping the thermocouple can push it out
of the firing chamber. This could cause an overfire! The
controller does not contain an alarm to detect this type
of failure. Bumping the thermocouple could also cause
inaccurate readings.
A
⅛
” thermocouple should extend into the firing
chamber ½” - 5⁄8”.
A ¼” thermocouple should extend into the firing
chamber ¾” - 1” or more.
Keep shelves, posts and ware 1” - 1½” away from the
thermocouple.
A Rapid Way to Scroll Numbers
During programming, hold an arrow key down several
second, and the numbers will begin to scroll rapidly.
Ordinarily, you would press
Up Arrow
to raise a number
and
Down Arrow
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:
To program a 99.59 hour Hold when the display
shows 00.00, press the
Down Arrow
once.
To program a FULL rate when the display shows 0000,
press the
Down Arrow
once.
To program a temperature of 200°F when the display
shows 1800°F, press the
Up Arrow
. That is faster than
pressing the
Down Arrow
.
Program Review & Repeat Firing
Program Review lets you check that the information
programmed into the controller is correct. It is a good
habit to use Program Review before every firing. Program
Review shows the values for the program in active
memory, which is either—
The program that was fired last.
The program that was selected since the last firing.
Program Review during firing:
Press the
Down
Arrow
key. The rate, temperature, hold, etc. will dis-
play one after the other. Firing will continue.
Program Review from IdLE:
Press the
Down Arrow
key. After rate, temperature, hold, etc.,
Strt
will
appear. Press
START/STOP
.
-On-
will appear, and the
kiln will begin fi ring 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, do not leave the kiln alone during
the delay or a firing. We cannot guarantee your kiln
against overfiring even though the controller is auto-
matic.
1. After you have entered a program and the controller
is ready to begin firing,
Strt
will appear.
2. Press the
Down Arrow
key once.
dELA
will appear,
alternating with
00.00
.
3. Use the arrow keys to enter delay time. (The decimal
separates hours and minutes. Example: 1 hour and
10 minutes = 01.10. Then press
START
.
dELA
will
appear, alternating with time left until the firing
begins.
800.545.6566
www.riogrande.com
3
Sentry Express Digital Temperature Controller
Sharing your passion for making jewelry.
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°F
°C
The center display dot
indicates time instead of
temperature.
