310103b Link and Lever System 2016 (TF)

Link and Lever Systems

Mechanics used extensively in instruments and controls, especially in pneumatic instruments.

Pneumatics

A branch of physics applied to technology that uses gas or pressurized air, commonly powered by compressed air or gases.

Span

Adjustment that may also be referred to as multiplication or amplification in link and lever systems.

Zero Adjust

Calibration step to set the output to zero at a specific input, crucial for accurate measurement.

Hysteresis Error

A discrepancy where the output differs for the same input value when input is increased compared to when it is decreased.

Dead Band Error

Condition where a change in input does not result in a change in output movement.

Angularity Adjust

Calibration to ensure the correct angular position of levers within link and lever systems.

Calibration Process

Sequence of steps including squaring linkage, zero adjustment, span adjustment, and angularity adjustment.

Characteristic Curve

Graphical representation showing the relationship between input and output in a system.

Error Identification

Process to identify types of errors including hysteresis and dead band error in pneumatic systems.