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Signals & Analog

Deadband

Definition

A gap between the value that activates something and the value that deactivates it, so a measurement sitting on the threshold does not chatter.

Set it wider than the normal noise on the signal. The same idea, applied to alarms, removes an enormous share of nuisance annunciations.

Also known as: hysteresis.

Read more

Deadband and HysteresisWhy a single setpoint chatters, how a deadband turns it into a start point and a stop point, how wide to make it, and where deadbands belong in alarms, level control, and controller outputs.

See also

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