Measurement Range; Near Range; Far Range; Measurement Response - Siemens sitrans LR200 Instruction Manual

false echo

Measurement Range

Near Range

Near Range (2.2.3.5.1.) programs SITRANS LR200 to ignore the zone in front of the
antenna. The default blanking distance is 50 mm (1.97") from end of horn antenna.
Near Range allows you to increase the blanking value from its factory default. But Auto
False Echo Suppression (2.2.4.2.) is generally recommended in preference to extending
the blanking distance from factory values.

Far Range

In applications where the base of the vessel is conical or parabolic, a reliable echo may
be available below the vessel empty distance, due to an indirect reflection path.
Increasing the range extension to 30% or 40% can provide stable empty vessel readings.

Measurement Response

The measurement response (response rate) limits the maximum rate at which the display
and output respond to changes in the measurement. Once the real process fill/empty rate
(m/s) is established, a response rate can be selected that is slightly higher than the
application rate. The response rate automatically adjusts the filters that affect the output
response rate.
7ML19985JR01 SITRANS LR200 (PROFIBUS PA) – INSTRUCTION MANUAL
learned
TVT curve
echo marker
Example after Auto
False Echo Suppression
liquid level
Page 107