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Calculating proportional band from PI gain on a Xenta 121


Calculate proportional band from Control > PI > gain values


  • Xenta 121
  • ZBuilder


The gain value in ZBuilder is a unitless value representing the inverse of the proportional band in °C. The maximum value for gain is 32.7675.


100/gain = proportional band °C

If the gain is set to 25, then the proportional band is 4°C (7.2°F, diff).

Because the maximum gain value is 32.7675, the smallest possible proportional band is 3.05°C (5.49°F, diff).

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