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Converters and references. No signup, nothing stored.

Bump test procedure

A safe, repeatable bump test procedure for control loops, with what to record and what the response tells you. Printable PDF.

What to expect from flow, pressure, level, temperature, speed and pH loops: typical structure, what usually goes wrong, and what to check first.

Convert a tuning set between series (interacting), ideal (non-interacting) and parallel (independent) PID forms.

Convert between proportional band percentage and controller gain in both directions. Free, no signup.

Convert controller reset between repeats per minute, minutes per repeat, seconds per repeat and repeats per second. Free, no signup.

Which valve trim characteristic suits your service, and what happens to loop tuning when the wrong one is fitted.