Two-Zone Kilns: Adjusting Heat In The Center Section (Cadj); Zone Temperature Display (T123); The Options Key; Thermocouple Offset (Tcos) - Orton Sentry 2.0 Operating Instructions Manual

Two-Zone Kilns: Adjusting
Heat in the Center Section
(CAdJ)
The Center Adjust op-
tion appears only on
two-zone kilns that contain
three relays and three banks
of elements. It does not ap-
pear on two-zone kilns with
two relays, or on three-zone.
Your kiln's wiring diagram
will show you the number of
relays in your kiln.
The Center Adjust acts as
an infinite control switch
that adjusts heat to the cen-
ter section of the kiln. A number will display. 100 is the fac-
tory default, meaning 100% heat. You can change the set-
ting from 0 to 200. The higher the number, the more the
heat in the center section.
From , press
appears.
Press . Use any number key to change the
number that appears.
Press . Press
Zone Temperature Display
(T123)
View Temperature of Each Zone
Press repeatedly until
Press .
The temperature for each zone will display one after
the other, cycling for one minute. Then normal tem-
perature display will return. For example:
Top zone:
Middle zone:
Bottom zone:
The warranty
does not cover
damage from
overfiring. Please
check the kiln to
make sure it
shuts off at the
proper time.
repeatedly until
to return to .
appears.
If you keep get-
ting error codes
such as FTH or
FTC, see Tem-
perature Devia-
tion on page 15.
Chapter 6

The Options Key

The Options key gives you access to a list of features.
With each press of the Options key, you will see the display
code for the next option.
When you find the option you want to use, press
.
Use the and keys to select changes within the op-
tion.
After making a selection for an option, press
. The display code for the option you just
changed will appear. You are then ready to go to the
next option.
If you select a change for an option but don't press
, the change will not go into effect.
There are two ways to get out of Options and back to
:
Press . If you are firing the kiln while in Op-
tions, pressing
back to the firing display. But it does not stop the fir-
ing.
Do nothing for 60 seconds in Options. You will auto-
matically be taken out of Options and back to

Thermocouple Offset (TCOS)

Calibrate the Thermocouple(s)
The thermocouple is the rod protruding into the firing
chamber. It measures temperature. Thermocouples can
"drift" as they age, causing a shift in temperature readings.
Thermocouple Offset calibrates the controller to compen-
sate for drift.
Note: The thermocouple must protrude into the firing
chamber the correct distance: 1" for ½" - ¼"-wide
thermocouples, " -
1 5
2
Calibrating Thermocouple Offset
With a Digital Pyrometer
You can calibrate Thermocouple Offset using a cali-
brated digital pyrometer. One way to calibrate your pyrom-
eter is to take it to a heat treater or other location that has a
calibrated controller you can trust. Take a reading from a
furnace with your pyrometer. Either zero it out to match
the calibrated controller on the furnace, or write down the
temperature difference between your pyrometer and the
reliable source. Store your pyrometer. Use it only for cali-
brating controllers. Thus, it remains a reliable calibration
standard.
Note: The temperature at which you calibrated your
digital pyrometer should be the same temperature you
use to check the controller's temperature readout. Ex-
takes you out of Options and
" for "-wide thermocouples.
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8 8
.
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