Geometry - Emerson Rosemount 1208A Reference Manual

Level and flow transmitter

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Configuration parameters

October 2022

Related information

Analog saturation levels

B.5

Geometry

B.5.1

Advanced

Calibration offset

Difference between surface distance measured by transmitter and the same distance

measured by, for example, hand-dipping with a measurement tape. A positive Calibration

Offset value will increase the presented level value.

Figure B-6: Calibration Offset

A. Positive Calibration Offset value

B. Negative Calibration Offset value

C. Reported level

D. Actual level

Upper null zone

The Upper Null Zone defines how close to the device's reference point a level value is

accepted. You can extend this value to block out disturbing echoes close to the antenna,

for example from the tank nozzle.

Note

Make sure the 20 mA value is below the Upper Null Zone. Measurements are not

performed within the Upper Null Zone (UNZ).

Reference Manual

00809-0100-7062

Rosemount 1208A Level and Flow Transmitter

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