Flowserve ValveAnalysis Manual de usuario Pagina 13

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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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