Siemens Sitrans PROBE LU Instruction Manual page 63
Profibus pa
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Also See for Sitrans PROBE LU:
- Quick start manual (185 pages) ,
- Instruction manual (130 pages) ,
- Operating instructions manual (117 pages)
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How the LTB works:
1.
The sensor technology block selects the proper echo. For an explanation of sensor
technology, please refer to
The sensor value (in sensor units) is checked to see if it is within its measuring limits.
If the limit is exceeded, this results in a Bad status and the error message Failure in
measurement. The sensor value is stored in Sensor Value.
The analog signal from the sensor is transformed into a digital signal.
A Sensor Offset (default 0) provides compensation if necessary for changes in the
sensor.
2.
Level Calibration is a linear transfer function that converts a sensor value to a level
value. The level value is used for volume calculation, if that function is enabled.
High Level Point
Level Value
Low Level Point
Near Range
High Level
(default: 100%)
Low Level
(default: 0%)
Far
Range
7ML19985JB02
SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL
Appendix A: Technical References
Level
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
Low Calibration Point
Sensor Value
Point
Sensor Value
Level
Point
Level Offset
on page 35.
Calibration
High Calibration Point
Sensor Reference Point
(transducer face)
Sensor Offset
High
Calibration
Point
Distance 1 or 2
(SV2 or SV3)
Secondary Value 1
Tank reference
point
Low
Calibration
Point
Page 57
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