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PLC Analog Input Card Resolution Effects on Accuracy

S Bharadwaj Reddy
An instrumentÂ’s accuracy is limited by its precision. An instrumentÂ’s precision is determined by making minute variations in the measured process variable (e.g., pressure, temperature) and then monitoring the instrumentÂ’s

Calibration and Preventative Maintenance Procedures

S Bharadwaj Reddy
Calibration and Preventative Maintenance Calibration: A comparison of two instruments or measuring devices one of which is a standard of known accuracy (traceable to national standards) to detect, correlate, report

Instrument Calibration Multiple Choice Questions

S Bharadwaj Reddy
Instrument Calibration Multiple Choice Questions Question 1 Identify the type of instrument calibration error(s) shown in this graph: (A) Hysteresis error (B) Linearity error (C) Both zero and span errors

Difference between Calibration and Ranging

S Bharadwaj Reddy
The concepts of calibration (trimming) and ranging are often difficult for new engineers of instrumentation to immediately grasp. A simple analogy useful for understanding these topics is that of setting

Important Terms in Calibration

S Bharadwaj Reddy
The term “calibration” in the context of smart/intelligent transmitters is often misunderstood. The information provided here serves to explain the difference between sensor trim, range setting, and current trim. Plants

Instrument Zero and Span Calibration

S Bharadwaj Reddy
Every instrument has at least one input and one output. For a pressure sensor, the input would be some fluid pressure and the output would (most likely) be an electronic

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