Flowserve ValveAnalysis Manuel d'utilisateur télécharger pdf (Page 13)

ValveAnalysis Diagnostic Software Module FCD

VLENIM0113-01 – 1/06

ﬂowserve.com

HDR

This measurement plots and calculates the hysteresis, deadband, and repeatability. The graph shows the

Position Error vs. Command. The Y-axis is labeled “Position Error %” which is equal to the Command

minus Position in percent. The X-axis is labeled Command as a percent of full stroke. Flowserve

ValveAnalysis then calculates the average and maximum combined hysteresis plus deadband and

repeatability.

Linearity

The third tab shows a graph of the valve’s linearity using two methods: average error and least-square

line. Flowserve ValveAnalysis also calculates the Linearity Error as a +/- percent. The Linearity Error is

shown directly below the graph.

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Flowserve ValveAnalysis Manuel d'utilisateur Page 13