User's Manual

Parameter reference
SITRANS LR250 (HART)
Operating Instructions, 01/2014, A5E32220602-AB
149
Remaining Sensor Lifetime (4.3.)
Note
•
Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly
stated.
•
Four sets of parameters allow you to monitor the Device/Sensor Lifetimes and set up
Maintenance/Service schedules, based on operating hours instead of a calendar-based
schedule. See also
Remaining Device Lifetime (4.2.), Service Schedule (4.4.)
, and
Calibration Schedule (4.5.)
.
•
Performing a reset to Factory Defaults will reset all the Maintenance Schedule
parameters to their factory defaults.
•
The device operates in years. To view Remaining Sensor Lifetime parameters in hours or
days (via SIMATIC PDM only) see
Lifetime Expected (4.3.1.)
.
The device monitors the predicted lifetime of the sensor (the components exposed to the vessel
environment). You can modify the expected sensor lifetime, set up schedules for maintenance
reminders, and acknowledge them.
To access these parameters via SIMATIC PDM:
● Open the menu
Device – Maintenance
and select the
Remaining Sensor Lifetime
tab.
● After modifying values/units as required, click on
Write
to accept the change, and
Read
to
view the effect of the change.
● Click on
Snooze
to add a year to the Total Expected Sensor Life.
● Click on
Sensor Replaced
to restart the timer and clear any fault messages.
Time Units
Options
a)
Hours; days; years
Default: years
a)
Selectable only via SIMATIC PDM.