Emerson Fisher 4320 Manual de Instruções descarregar pdf (Página 46)

Instruction Manual

D103621X012

4320 Position Monitor

April 2014

Open Stroke (Cal)—indicates the time required to complete open stroke during Auto Calibration.

Last Open Stroke—indicates the time required to complete the most recent stroke from closed to opened position.

Enable 'Open Stroke'

High Trip Point

Low Trip Point

Calibration

WARNING

During calibration the valve will move full stroke. To avoid personal injury and property damage caused by the release of

pressure or process fluid, isolate the valve from the process and equalize pressure on both sides of the valve or bleed off the

process fluid.

Note

You cannot change the valve set point (i.e. open to closed) when the instrument is in snap-acting mode. This is because the

position signal from the monitored equipment is used to change the state of a different valve. Refer to figure 3 on page 3.

Manual calibration of the output is required when in snap-acting mode.

Calibration Date—indicates when the instrument was last calibrated.

Note

The Not Calibrated Alert replaces Calibration Date when it is active.

Sensor Calibration—allows you to run a calibration on the instrument. Follow the prompts on the Field Communicator

to run Auto or Manual Calibration.

Note

If it takes longer than 5 minutes to move the valve in each direction during Auto Calibration, Manual Calibration will need to be

performed. A normal auto calibration moves from Open > Closed > Open > Closed, and may take up to 20 minutes.

Output Assignment—allows you to associate the output ports with a stroke direction (open or close) by observing the

action during a stroke. This procedure is used to complete a controller calibration process if Manual Calibration was

used for the sensor, and is the only way to assign output sense in snap-acting mode.

Note

Output Assignment is only available for units equipped with the on/off control option.

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Emerson Fisher 4320 Manual de Instruções Página 46