Flowserve MX HART Field Unit Manual de usuario descargar pdf (Pagina 47)

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

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Calibration is complete; click OK to exit the method.

3.7.2 Re-range Procedure

The PV Upper and Lower Range values can be calibrated by clicking the Set PV Range Values button on the DD menu

Device Setup->Calibration. This calibration deﬁnes the relationship between the zero and gain Loop Current values and

the Primary Value.

Standard:

Set Upper Range value to 100%, and Lower Range Value to 0%

Zero = 4 mA -> lower range = 0% open; Gain = 20 mA -> upper range = 100% open

To reverse the polarity of the signal the user may set the Upper Range value lower than the Lower Range value.

Reversed:

Set Upper Range value to 0%, and Lower Range Value to 100%

Zero = 4 mA = lower range = 100% open, gain = 20 mA = Upper Range = 0% open

The signal may also be limited to a smaller range, for example:

Set the Upper Range value to 80%, and the Lower Range Value to 0%

Zero = 4 mA = lower range = 0% open, gain = 20 mA = Upper Range = 80% open

When the Set PV Range Values button is clicked, a warning is given that this may cause the actuator to move:

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Flowserve MX HART Field Unit Manual de usuario Pagina 47