Calibration; Calibration: Reference Method - Siemens SITRANS L LU150 Operating Instructions Manual

5.2

Calibration

The calibration of the mA output may be done such that its span will be either proportional or
inversely proportional to the material level.
Note
The 4 and 20 mA levels may be calibrated in any order.
5.3

Calibration: reference method

1. Adjust the material level (or target) to the desired distance from the sensor face.
2. Press the "4" or "20" key (as appropriate) to view the stored distance associated with that
mA output value.
3. Press the key a second time to set the new distance reference.
4. After viewing or calibrating, the unit operation automatically reverts to the Run mode (6
sec). The calibration value is referenced from the face of SITRANS LU150 sensor, in the units
displayed.
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC
Proportional span
high level = 20 mA
low level = 4 mA
Commissioning
5.2 Calibration
Inversely proportional span
high level = 4 mA
low level = 20 mA
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