Sensor Calibration - Siemens Sitrans PROBE LU Instruction Manual

2.4. Sensor Calibration

High Level Point
(default: 100%)
Low Level Point
(default: 0%)
2.4.1. Sensor Units
Whatever units the sensor is measuring in.
2.4.2. Calibration Type
In Dry calibration, the user enters all four calibration values: High and Low Level
Points, and High and Low Calibration Points. In Wet calibration, the actual material
level provides the values for Low Calibration and High Calibration Points. The user
enters the corresponding Low and High Level Points.
Hand
programmer
values
Open the menu Device – Sensor Calibration, and click on the button for Wet or
Dry calibration.
1.
Sensor Reference Point: the point to which all of the above parameters are refer-
enced, which is the transducer face.
2.
Sensor Value: the value produced by the echo processing, which represents the dis-
tance from the Sensor Reference Point to the target.
3.
Level Value: the level measured in level units.
Page 80 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL
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2
Sensor Value
3
Level
Level Offset
Secondary Value 1
0 *
Dry calibration (preferred)
1
Wet calibration
Sensor Reference Point
(transducer face)
Sensor Offset
Tank Reference Point
High
Calibration
Point
Low Calibration
Point
3
1
7ML19985JB02