Emerson Process Management 5300 manual Level and Distance Calibration, Distance calibration

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

LEVEL AND DISTANCE CALIBRATION

Level and distance calibration may be necessary when using a nozzle or pipe or if there are disturbances in the near zone caused by a physical object.

Non-metallic (e.g. plastic) vessels and installation geometry may introduce an offset for the zero reference point. This offset may be up to ± 25 mm. The offset can be compensated for using Distance Calibration.

When calibrating the transmitter, it is important that the product surface is calm and that the tank is not being filled or emptied.

A complete calibration is performed in two steps:

1.Calibrate the Distance measurement by adjusting the Calibration Offset parameter.

2.Calibrate the Level measurement by adjusting the Tank Height.

Distance calibration

1.Measure the actual distance between the Upper Reference Point and the product surface.

2.Adjust the Calibration Distance so that the Distance measured by the transmitter corresponds to the actual distance.

The Calibration Distance parameter is available via HART command [2, 3, 2, 4, 1],

or RRM:

a.Click the Tank icon under Device Config/Setup in the RRM workspace.

b.In the Tank window, select the Geometry tab.

c.Click the Advanced button.

d.Enter the desired value in the Calibration Distance field and click the Store button.

Level calibration

1.Measure the actual Product Level.

2.Adjust the Tank Height so the product level measured by the transmitter corresponds to the actual product level.

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