Checking Element Ohms on an E18S model L&L Kiln

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  • Unplug kiln.
  • Open the outer control box. See the Assembly Instructions if necessary.
  • Using your Multimeter set on Resistance or Ohms, 200, check resistance on the wires numbered 1 and 2 and then again between 3 and 4.  These wires are thick black wires that attach to the terminal strip that carry power from the relays to the elements.
  • If you check the resistance at this point, the values you should get are as follows: 240 Volt Elements: 20.8 ohms, 220 Volt Elements: 17.6 ohms, 208 Volt Elements: 15.6 ohms.
  • The values should be within 6-12% of the listed values. Typically the resistance increases over time and use, and this makes the power generated by the elements decrease. Depending on the temperature one is firing at, wider variation may not be problematic.
  • In addition, here are the values for the individual elements: 240 Volt Elements: 10.4 ohms, 220 Volt Elements: 8.8 ohms, 208 Volt Elements: 7.8 ohms. Individual element resistance values are important as a way to provide a means of checking specific element resistance before you put elements in the kiln.

See this tutorial on how to use a multimeter.