The standard outlines rigorous procedures for evaluating several critical performance factors: iTeh Standards Accuracy Metrics : Defines how to calculate errors, hysteresis
The difference in output at the same input point depending on whether you are "going up" or "coming down" the scale. 2. Dead Band Testing
Part 5 was not republished in the 2008+ series; reliability is typically tested per IEC 61508 or ISO 14224.
For each test, the standard defines the procedure to calculate the influence error —how much the output shifts due to that factor. Armed with this data, a plant engineer can decide if an instrument needs a heated enclosure or an anti-vibration mount.
Beyond standard signal accuracy, the physical characteristics of the internal circuitry and mechanical housings must be thoroughly documented.
How much must the input change before the device even notices?
"Cost-cutting," Elias sighed. "They saved fifty bucks on brackets and ignored the clause about endurance."