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Siemens SITRANS L 7ML5400 Operating Instructions Manual page 261

Ultrasonic level controllers
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Time Last Calibration (3.3.6.2.)
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 local push buttons, navigate to Maintenance and Diagnostics (3.) (Page 244) >
Maintenance (3.3.) (Page 250) > Schedule (3.3.6.) (Page 260) > Time Last Calibration
(3.3.6.2.), and set to zero.
Time Next Calibration (3.3.6.3.)
Read only. Calibration Interval (3.3.6.1.) (Page 260) less Time Last Calibration (3.3.6.2.)
(Page 261).
Reminder Activation (3.3.6.4.)
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.
Values
1. First set the values in Reminder 1 before Calibration (Required) (3.3.6.5.)
(Page 261)/Reminder 2 before Calibration (Demanded) (3.3.6.6.) (Page 262).
2. Select the desired Reminder Activation option.
Reminder 1 before Calibration (Required) (3.3.6.5.)
If Time Next Calibration (3.3.6.3.) (Page 261) is equal to or less than this value, the device
generates a Maintenance Required reminder.
Values
1. Modify values as required.
2. Set Reminder Activation (3.3.6.4.) (Page 261) to the desired option.
SITRANS LUT400
Operating Instructions, 04/2021, A5E33329501-AG
*
TIMER OFF
ON NO LIMITS - no reminders checked
ON REMINDER 1 (MAINTENANCE REQUIRED) checked
ON REMINDER 1 AND 2 checked
ON REMINDER 2 (MAINTENANCE DEMANDED) checked
Parameter reference (LUI)
9.3 Maintenance and Diagnostics (3.)
Range: 0.000 to 20.000 years
Default: 0.164 years (8 weeks)
261

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