Is the CS220-L affected by a magnetic field?

Magnetic fields do affect thermocouples, but Campbell Scientific data loggers are designed for thermocouple measurements and have built-in tools to make the best measurements possible.

Some suggestions for better measurements:

  • Use a thermocouple with a shield that is tied to ground on the data logger side.
  • Use the TCDiff() and TCSe() instructions. In those instructions there is a 50 and 60 Hz noise filter that can be used.
  • Never run thermocouple wires in the same conduit as ac voltage.

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