Principle Of Operation - Siemens SITRANS LG270 Operating Instructions Manual

Scope of this operating
instructions manual
Versions
Scope of delivery
Application area
Functional principle -
level measurement
PBD-51041066
This operating instructions manual applies to the following instrument
versions:
•
Hardware from 1.0.0
•
Software from 1.0.0
•
Only for instrument versions without SIL qualification
This electronics version can be determined via the product code on
the type label as well as on the electronics.
•
Standard electronics: Type FX80HK.-
The scope of delivery encompasses:
•
Sensor
•
Documentation
– this operating instructions manual
– Test certificate measuring accuracy (optional)
– Operating instructions manual "Display and adjustment mod-
ule" (optional)
– Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors" (optional)
– Ex-specific "Safety instructions" (with Ex versions)
– if necessary, further certificates
3.2

Principle of operation

The SITRANS LG270 is a level sensor with cable or rod probe for
continuous level or interface measurement, particularly suitable for
applications in high temperatures up to +450 °C (842 °F).
High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reflected. The running time is evaluated by the instrument and output-
ted as level.
SITRANS LG270 - Operating Instructions 9