Operating Instructions

Acknowledge Status (4.2.8.)
Indicates which level of maintenance reminder has been acknowledged.
In SIMATIC PDM, open the menu View – Device Status, click on the Maintenance tab, and
check the Device Lifetime Status window.
Acknowledge (4.2.9.)
Acknowledges the current maintenance reminder.
To acknowledge a reminder via SIMATIC PDM:
1. Open the menu View – Device Status and click on the Maintenance tab.
2. In the Device Lifetime section, click on Acknowledge Warnings.
To acknowledge a reminder via the handheld programmer:
1. Press RIGHT arrow
twice to open parameter view and activate Edit Mode.
2. Press RIGHT arrow to acknowledge the reminder.
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.
Parameter reference
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 135