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Diagnostics And Servicing; Maintenance; Diagnosis Memory - Siemens SITRANS LG270 Operating Instructions Manual

Guided wave radarfoundation fieldbus coax probe, minus 280 degrees c; minus 196 ... plus 450 degrees c.
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Measured value memory
Event memory
Echo curve memory

Diagnostics and servicing



If the instrument is used correctly, no maintenance is required in
normal operation.

Diagnosis memory

The instrument has several memories available for diagnostic pur-
poses. The data remain there even in case of voltage interruption.
Up to 100,000 measured values can be stored in the sensor in a ring
memory. Each entry contains date/time as well as the respective
measured value. Storable values are for example:
Filling height
Percentage value
Lin. percent
Current value
Meas. certainty
Electronics temperature
When the instrument is shipped, the measured value memory is
active and stores distance, measurement certainty and electronics
temperature every 3 minutes.
In "Extended adjustment" you can select the respective measured
The requested values and recording conditions are set via a PC with
PACTware/DTM or the control system with EDD. Data are thus read
out and also reset.
Up to 500 events are automatically stored with a time stamp in the
sensor (non-deletable). Each entry contains date/time, event type,
event description and value. Event types are for example:
Modification of a parameter
Switch-on and switch-off times
Status messages (according to NE 107)
Error messages (according to NE 107)
The data are read out via a PC with PACTware/DTM or the control
system with EDD.
The echo curves are stored with date and time and the corresponding
echo data. The memory is divided into two sections:
Echo curve of the setup: This is used as reference echo curve for
the measurement conditions during setup. Changes in the measure-
ment conditions during operation or buildup on the sensor can thus
be recognized. The echo curve of the setup is stored via:
PC with PACTware/DTM
Control system with EDD
SITRANS LG270 - Operating Instructions


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