How often to calibrate a Pressure Switch /Level Switch /Temperature Switch /Flow Switch?


#1

Calibration Interval for switches

-Annual calibration is very typical for switches
-If high accuracy and critical process,semi-annual or quarterly

Factors to consider for deciding calibration period

-Manufactures recommendation
-Influence of environment
-Criticality
-Tolerance
-History,Consistency with similar device

Refer - NCSL RP 1 standard for more information about calibration interval.

http://www.ncsli.org/