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OPTIONAL
EQUIPMENT
Automactic Damper System
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The microprocessor controller is the main controller
of the system, responsible for time, temperature
and atmosphere of a kiln firing. It reads the temperature
by means of a thermocouple mounted on the back wall
protruding into the interior of the kiln. The microprocessor
then processes the pre-programmed parameters (i.e.:
ramp soak segments) and adjusts the output signal
to the proportioning valve located on the valve
train. Depending on the call for heat from the microprocessor,
the proportioning valve will vary the amount of
gas reaching the burners. The kiln is also equipped
with an oxygen probe located just below the thermocouple.
Reading the atmosphere of the kiln via the oxygen
probe, the microprocessor sends a signal to the
damper motor which then adjusts the damper automatically
to control the atmosphere.
By programming the microprocessor's parameters with
time and temperature, the kiln can be fired by ramping
to a set point within a particular time frame. This
ramp time plus a soak time is one segment. The microprocessor
contains four ramp soak segments making up what
is called a firing profile. This profile is stored
in the microprocessor's nonvolatile memory. The
microprocessor contains two operating modes, AUTO
and MANUAL. These pre-programmed firing profiles
can be operated by the AUTO mode. The kiln can also
be fired manually by the microprocessor controller.
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Our auto-damper system is PC controlled using a
windows based program that is very easy to operate
and hook up. All the parameters from the controller
are displayed on your computer screen, making it
easier to update and change your firing profiles.
The program takes about 5 megabytes of space on
your hard disk. There are no major upgrades needed
for you to install and connect the microprocessor
program. The microprocessor program offers remote
station firing capabilities.
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Automatic damper controls
the kiln's atmosphere |
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The oxygen probe on
the kiln sends atmosphere conditions
to the control panel. The microprocessor
reads the signal and adjust the damper
automatically. |
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The proportional gas
valve maintains just the right amount
of gas to ramp or soak the kiln at all
times during the firing. |
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Microprocessors on the
kiln control both temperature (ramp/soak)
and atmosphere. |
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The microprocessor controller is
equipped with a high-limit alarm. The high-limit
alarm will shut the kiln down once the kiln hits
the high limit temperature. The damper is automatically
closed to prevent any thermal shock. lf there is
any disruption of gas or flame failure, the flame
safety system will automatically shut the kiln down.
Our auto-damper system is backed by an ETL Intertek
(Canadian Standard Association) certification, meeting
the required safety standards for gas appliances.
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A thermocouple
is a temperature reading device made up of two dissimilar
metals that, when heated, produce a thermoelectric
current. The speed of the current increases as the
temperature increases.
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