Siemens 7ML5431 - Page 151

Parameter reference
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
151
Time Since Last Calibration (4.5.2.)
Time elapsed since last calibration. Can be reset to zero after performing a calibration.
To reset to zero:
● In SIMATIC PDM, open the menu Device – Maintenance, click on the Calibration
Schedule tab, and click on Calibration Performed to restart the timer and clear any fault
messages.
● Via the handheld programmer, manually reset Time Since Last Calibration (4.5.2.) to
zero.
Time Until Next Calibration (4.5.3.)
Read only. Calibration Interval (4.5.1.) less Time Since Last Calibration (4.5.2.).
Activation of Reminders (4.5.4.)
Note
To modify this parameter via SIMATIC PDM it must be accessed via the pull
-down menu
Device
– Maintenance.
Allows you to enable a maintenance reminder.
Options
Timer OFF
ON - no reminders checked
ON - Reminder 1 (Maintenance Required) checked
*
ON - Reminders 1 and 2 checked
ON—Reminder 2 (Maintenance Demanded) checked
1. First set the values in Reminder 1 before Calibration (Required) (4.5.5.)/Reminder 2
before Calibration (Demanded) (4.5.6.).
2. Select the desired Activation of Reminders option.
Reminder 1 before Calibration (Required) (4.5.5.)
If Time Until Next Calibration (4.5.3.) is equal to or less than this value, the device generates
a
Maintenance Required reminder.
Values
Range: 0 to Calibration Interval (4.5.1.)
Default: 0.164 years
1. Modify values as required.
2. Set Activation of Reminders (4.5.4.) to the desired option.