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User Programs
25 User Programs are available. The User Program mode allows you to customize your firing schedule and specify
how fast the kiln heats or cools to any temperature. All Programs allow 20 ramp steps. Each ramp step consists of a
heating rate (or cooling rate), a target temperature and a hold time.
Temperature Units
If your controller is configured to display temperature values in °F, heating rates will be programmed as Degrees
Fahrenheit per hour and target temperatures will be programmed as Degrees Fahrenheit. If your controller is
configured to display temperature values in °C, heating rates will be programmed as Degrees Centigrade per hour
and target temperatures will be programmed as Degrees Centigrade. To change the temperature units, see the F/C
option.
Heating/Cooling Rates
Each program step requires you to program the desired rate value.
Rate is the speed of the ramp step. Rate is programmed as Degrees per Hour if the RATE option is set to HOUR.
Some calculations may be required to determine your desired heating rate.
Example; if you know that you want to heat the kiln from room temperature (75°F) to 212°F over a 2 hour period,
First determine the amount of temperature rise:
Then divide the amount of temperature rise (or drop) by the number of hours you would like it to take to get there.
(For Example, 2 hours)
Round the calculated rate to the nearest whole number and your heating rate would be 69 degrees/hour.
If you prefer to program heating and cooling rates in 'degrees per minute', adjust the RATE option in the options
menu to MIN.
If you prefer to program heating and cooling rates in 'Hours and Minutes', adjust the RATE option in the option
menu to TIME.
RA
is the controller display for rate. Each rate segment will have its own number. The rate for the first ramp step
will be displayed as RA 1, the rate for the second ramp as RA 2 and so on.
Maximum Ramp Rate for User Programs
The range of values available for a controlled ramp rate setting is 0-1798F per hour or 0-29.97F per minute.
To program a rate that heats or cools as fast as possible, Set the rate to FULL. FULL appears as a selection for
1799F/hour or 29.98F/min. Just above the maximum ramp rate. You can also find the FULL setting by pressing
the decrease/review button one time when the display shows zero for the rate setting.
When the RATE option is set for TIME, the maximum ramp rate or FULL setting is 00.00, the range of controlled
rates is 00.01 (1minute) to 99.58 (99hours.58minutes)
When the Ramp Rate is set to FULL the controller will interpret this as full power for a heating ramp. This will
allow the kiln to heat as fast as possible to the target temperature without rate control. If the ramp is a cooling step,
the controller will interpret the same values as no power and allow the kiln to cool as fast as possible without rate
control.
AF4X Kiln Controller
212 - 75
=
137 degrees
137 / / / / 2
=
68.5 degrees per hour
8
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