Operating Instructions

Table Of Contents
Service and maintenance
9
9.1 Basic safety information
WARNING
Impermissible repair of the device
Repair must be carried out by Siemens authorized personnel only.
CAUTION
Releasing button lock
Improper modification of parameters could influence process safety.
Make sure that only authorized personnel may cancel the button locking of devices for
safety-related applications.
9.2 Cleaning
The radar device requires no cleaning under normal operating conditions.
Under severe operating conditions, the antenna may require periodic cleaning. If cleaning
becomes necessary:
Note the antenna material and the process medium, and select a cleaning solution that will
not react adversely with either.
Remove the device from service and wipe the antenna clean using a cloth and suitable
cleaning solution.
NOTICE
Penetration of moisture into the device
Device damage.
Make sure when carrying out cleaning and maintenance work that no moisture penetrates
the inside of the device.
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 153