Using Auto False Echo Suppression - Siemens Sitrans LR 460 Instruction Manual

1 2 3 4
, , , .,,
High Level Point
(default: 100%)
Low Level Point
(default: 0%)
Far Range
Calibration – steps 1 to 7
1. Open the menu Device – Sensor Calibration and select the button Dry Calibration.
(Click on Additional Information to see the schematic showing the PROFIBUS
parameters.)
2. Enter the new value for Low Calibration Point (default units are meters).
3. Enter the corresponding value for Low Level Point in percent (default is 0).
4. Enter the new value for High Calibration Point (default units are meters).
5. Enter the corresponding value for High Level Point in percent (default is 100).
6. Click on Transfer.
7. SITRANS LR 460 is now ready to operate.

Using Auto False Echo Suppression

If SITRANS LR 460 displays a false high level, or the reading is fluctuating between the
correct level and a false high level, you can use the Auto False Echo Suppression
parameters to prevent false echo detection. See
setup
on page 68 for instructions.
1.
The point to which all of the above parameters are referenced. For the standard rod
antenna, see
2.
Sensor Offset is a negative value (see
detail).
3.
The value produced by the echo processing, representing the distance from the
Sensor Reference Point to the target.
4.
Level Value: the level measured in level units.
Page II-30 SITRANS LR 460 (4-20 mA) – INSTRUCTION MANUAL
Sensor Value
4
Level
Level Offset
SITRANS LR 460 Dimensions
Sensor Reference Point
2
Sensor Offset
High
Calibration
3
Point
Secondary Value 1
TVT (Auto False Echo Suppression)
on page 10.
Sensor Offset (default 0)
1
tank reference point
Low Calibration
Point
on page 64 for more
7ML19985JM01