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Understanding Digital Firing Rate

At Paragon we are often asked about the firing rate of a digital kiln. “Does the increase in temperature always assume a one hour time period?” someone asked. “If I need to get to 300 degrees in 30 minutes, would I set the ramp for 600 degrees per hour?”

The answer is yes. Rate is figured in degrees per hour. At a rate of 100 degrees per hour, the kiln would take 10 hours to reach 1000 degrees.

It may be easier to understand rate if you compare it to miles per hour. 60 miles per hour, for instance, is one mile per minute. A firing rate of 60 degrees is one degree of temperature rise per minute.

Once you understand that firing rate is figured in degrees of temperature change per hour, you can transfer a firing record from a switch-operated kiln to a digital kiln. Here is an example from a manual kiln that I test-fired:

4:00 p.m.: START 6:00 p.m.: 1876 deg. F.

The kiln reached 1876 degrees in two hours. Room temperature was about 76 degrees. Subtract room temperature from the final temperature to figure the kiln’s actual temperature rise. 1876 – 76 = 1800, or total temperature rise. Divide that amount by hours fired to figure degrees of temperature rise per hour. 1800 divided by 2 = 900. The rate to be programmed into a digital kiln is 900.

I hope you have a great week.

Sincerely,

Arnold Howard Paragon Industries, L.P. 2011 South Town East Blvd. Mesquite, TX 75149-1122 972-288-7557 / 800-876-4328 Fax: 972-222-0646 arnoldhoward@att.net / www.paragonweb.com



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