Measurement Range; Measurement Response - Siemens Sitrans LR200 Instruction Manual

Example after Auto False Echo Suppression
learned TVT
false echo

Measurement Range

Near Range (2.8.1.)
Near Range programs SITRANS LR200 to ignore the zone in front of the antenna. The
default setting is 0.3 m (1 ft), plus any shield length, from the sensor reference point
Near Range allows you to increase the value from its factory default but Auto False Echo
Suppression (2.8.7. 1 .) is generally recommended in preference to this.
Far Range (2.8.2.)
Far Range can be used in applications where the base of the vessel is conical or para-
bolic. A reliable echo may be available below the vessel empty distance, due to an indi-
rect reflection path.
Increasing Far Range to 30% or 40% can provide stable empty vessel readings.

Measurement Response

Note: Units are defined in Units (2.2. 1 .) and are in meters by default.
Response Rate (2.4.1.) limits the maximum rate at which the display and output respond to
changes in the measurement. There are three preset options: slow, medium, and fast.
Once the real process fill/empty rate (m/s by default) is established, a response rate can
be selected that is slightly higher than the application rate. Response Rate automatically
adjusts the filters that affect the output response rate.
Response Rate
(2.4.1.)
* Slow
Medium
Fast
1)
For the reference point for each configuration, see
Rod Antenna
on page 13 for the standard version, or
page 150 onwards.
7ML19985JP02
Auto False Echo
Suppression
Range
Fill Rate (2.4.2.)/
Empty rate (2.4.3.)
0. 1 m/min (0.32 ft/min)
1.0 m/min (3.28 ft/min)
10.0 m/min (32.8 ft/min)
SITRANS LR200 (HART) – INSTRUCTION MANUAL
Auto False Echo
Suppression
default
Range set to 2 m
TVT
material
level
echo marker
Damping Filter
(2.2.4.)
Dimensions: Uni-Construction Polypropylene
Appendix G: Flange Adapter Versions
1)
.
10 s
,
Page 127