User's Manual

Page II-30 SITRANS LR 460 (4-20 mA) – INSTRUCTION MANUAL 7ML19985JM01
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mA: Startup
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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
TVT (Auto False Echo Suppression)
setup
on page 68 for instructions.
1.
The point to which all of the above parameters are referenced. For the standard rod
antenna, see
SITRANS LR 460 Dimensions on page 10.
2.
Sensor Offset is a negative value (see Sensor Offset (default 0) on page 64 for more
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.
High Level Point
(default: 100%)
Sensor Reference Point
1
Sensor Value
3
Low Level Point
(default: 0%)
Level
4
Level Offset
Secondary Value 1
Low Calibration
Point
Sensor Offset
2
High
Calibration
Point
Far Range
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a
r
R
a
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g
e
tank reference point