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The block diagram and flow chart show that the kiln control system, in its simplest form, works
like your thermostat at home – when the temperature is too cool the heater comes on; when the
temperature is too hot the heater turns off. The major components of the control system are the V6-CF
controller, thermocouple temperature sensor, relay switch, power source and heating elements. The
controller is the brain of the operation; the controller adjusts the traveling set point according to your
program, reads the temperature in the kiln, cycles the relay on or off and determines when to end the
program.
The thermocouple (t/c) sensor is the first part to inspect when loading the kiln. The tip of the t/c
should protrude 1" to 2" into the firing chamber. Next, “START” is pressed, the controller reads the kiln
temperature and uses that temperature as a starting point for a traveling set-point (also called the local set-
point). The displayed temperature is the temperature inside the kiln. You should then hear the relay(s)
start cycling on and off to keep the temperature near the traveling set point. As the firing progresses the
controller moves the traveling set-point according to the programmed firing rate. The displayed
temperature should increase with the traveling set-point and the relay will be “on” longer. This sequence
continues until the final temperature is reached and the controller turns off the kiln. The display reads
“CPLT”.
Controller Flow Chart
Step 1
Read temperature inside kiln
Step 2
Compare temperature
to
traveling set point
If temperature is above
set point,
turn relay off
If temperature is below
set point
turn relay on
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and
repeat the process