The post AutoQuiz: When Does an Instrument Need to Be Recalibrated? first appeared on the ISA Interchange blog site.
Today’s automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for information about the CCST program. This question comes from the Level I study guide, Domain 3, Troubleshooting. Level I represents a professional who has a five-year total of education, training, and/or experience.
An instrument calibration error comes to your attention. Your analysis of the calibration plot determines that __________ and the instrument does, in fact, need recalibration.
a) there is a zero error
b) there is a span error
c) there is both a zero and span error
d) there is a linearity error
e) none of the above
Source: ISA News