Sentry Industries Sentry Xpress 4.0 - Manual (Page 11)

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(pages 7, 8) These
are Ramp-Hold programs stored in memory.
etc. (Rate) (page 8) This appears in
Ramp-Hold programming for each segment. 1, 2,
etc. are segment numbers. Enter the rate of temper-
ature change for that segment. Rate is figured in de-
grees of temperature change per hour. Example:
A temperature rise of 100° in two hours = 50° rate.
A temperature drop of 200° in one hour = 200° rate.
(page 6)
These are preset firing rates, or speeds, in Sin-
gle-Speed mode.
(Skip Step) (page 8) This message appears
when you press the key during a
Ramp-Hold firing. You can skip out of a segment
into the next segment.
The firing was stopped by pressing
.
The "Ready to Start" message appears after
programming a firing. Press to begin firing.
Thermocouple Offset (press the ) and De-
lay (press the ) are accessed from the
message.
Thermocouple Offset (Page 12). Adjust the
controller to fire hotter or cooler.
Error Messages
bAdP / Bad Programming
The kiln will not fire because a) the Ramp-Hold pro-
gram just entered has a rate of 0000 in segment 1, or b) the
target temperature in Single-Speed or segment 1 of
Ramp-Hold is lower than the current temperature.
EtH / Electronics Too Hot
The circuit board temperature is above 176°F / 80°C.
Press any key to return to .
To lower the board temperature, use a fan to blow air
across the kiln switch box into the louvers. (But do not blow
air into the kiln’s peepholes.) If you have more than one
kiln in the room, place them farther apart. Never allow the
firing room temperature to exceed 110°F / 43°C. (Measure
room temperature three feet away from the kiln.)
FAIL / Thermocouple Failure
The thermocouple, or temperature sensor, failed during
firing. Causes:
■ Defective thermocouple or disconnected/loose wires
■ Defective controller
■ Electrical noise
Thermocouple Paperclip Test
Check the thermocouple wire connections. (See your
kiln instruction manual.) If connections are tight, perform
this test:
UNPLUG the kiln or disconnect the power. Re-
move the controller. Remove the two thermocouple
wires from the back of the controller.
Cut a thin paperclip in half. Insert a U-shaped
paperclip piece, or other piece of thin wire, where
you removed the thermocouple wires.
Plug in the kiln. If the controller displays room tem-
perature, replace the thermocouple. If it shows
, return the controller for repair or
replacement.