10
NOTES: For Vary-Fire programming
1.
The first ramp rate of any user program must be an increasing ramp which means the segment
temperature must be greater than the starting kiln temperature.
2.
To ramp up or down at the maximum rate, enter a rate of 9999.
3.
To program a down ramp, you enter the rate/hour then a temperature below the previous
segment’s temperature.
4.
It is best to write out the firing profile that you plan to program before you begin programming.
At the end of the Operation Manual there is a blank form for writing your firing programs.
Photo-copy as needed.
Calculating ramp rates for VARY Fire:
If you want to go from room temperature to 750
o
F in 3 hours, here is how to calculate the ramp rate. Take
the temperature that you want to go to (750
o
F) minus the starting temperature (70
o
F - approximate room
temperature) to get the number of degrees you want to increase in 3 hours (750 - 70 = 680). Divide this
number by the time you want to get to 750 to give you the ramp rate (680
o
F
÷
3 hrs = 227
o
F/hr).
If you want to add another segment to go from 750
o
F to 1000
o
F in 4 hours, the same procedure is used.
Take the end temperature minus the starting temperature (1000 - 750 = 250) and divide this number by the
number of hours to reach 1000
o
F (250
o
F
÷
4 hrs = 63
o
F/hr).
