Emerson Process Management 5300 manual Optional configurations

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

Probe End Projection is used to :

•Use the probe end echo as reference, in case the surface echo is lost, to calculate the surface echo position

•Use the probe end echo as reference when the surface echo is close to the probe end to enhance accuracy of the surface echo position

Figure C-9. Probe End Projection setup.

NOTE!

This function is only available for Liquid/solid product level measurement modes (i.e. not available for interface or fully submersed interface measurement modes) and a well defined probe end echo (i.e. ensure that the probe end/centering disc/weight is either always in contact with the tank wall or never in contact with the tank wall).

NOTE!

Assure that the Tank settings; Mounting Type, Probe Type, and Probe Length have been assigned correct values before continuing.

Probe End Projection can be configured using a guide. When the tank is empty, the guided setup will be able to accurately calibrate probe end offset and probe end pulse polarity. You will be asked to insert an initial value for the Product DC. This is the value for the product dielectric constant that the device uses as a start point for estimation. This value must be as accurate to the actual value of the dielectric constant as possible.

When the tank is filled, the guided setup will be able to estimate the Product DC. This value is used as an initial value for future estimation of the Product DC.

For best performance, complete the guided setup with an empty tank and then a second time with a filled tank, but do not overwrite the empty tank calibration.

Probe End Projection can be configured in RRM. This function can be reached from the Device Specific Configuration in the Guided Setup (if the configuration is recommended) or from the Advanced Configuration window, Probe End Projection tab. Click Guided Probe End Projection Setup to start the configuration.

In 375 Field Communicator, the Device Specific Configuration is reached with sequence [2, 1, 7, 2] (if the configuration is recommended) or from the sequence: [2, 7, 2].

Optional configurations:

DC Estimation Limit: This is a limit for the product dielectric constant estimation. The limit is a percentage, saying how much the estimated product DC is allowed to differ from the initial product DC value. If the estimation goes outside this limit, a warning will be generated.

Used Product DC: This is the estimated product dielectric constant that the device will use for Probe End Projection.

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