Installing/mounting
4.1 Basic safety information
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
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Exceeded maximum permissible operating pressure
Danger of injury or poisoning.
The maximum permissible operating pressure depends on the device version. The device
can be damaged if the operating pressure is exceeded. Hot, toxic and corrosive process
media could be released.
• Make sure that the device is suitable for the maximum permissible operating pressure of
your system.
The process connection tag shall remain with the process pressure boundary assembly.
(The process pressure boundary assembly comprises the components that act as a
barrier against pressure loss from the process vessel: that is, the combination of process
connection body and emitter, but normally excluding the electrical enclosure). In the
event the device package is replaced, the process connection tag shall be transferred to
the replacement unit.
Representative samples of this device have been hydrostatically tested, meeting or
exceeding the requirement of the ASME Boiler and Pressure Vessel Code and the
European Pressure Equipment Directive.
The serial numbers stamped in each process connection body, (flange, threaded, or
sanitary), provide a unique identification number indicating date of manufacture.
Example: MMDDYY – XXX (where MM = month, DD = day, YY = year, and XXX=
sequential unit produced)
Further markings (space permitting) indicate flange configuration, size, pressure class,
material, and material heat code.
4.1.2.1 Pressure Equipment Directive, PED, 14/68/EU
Siemens Level Transmitters with flanged, threaded, or sanitary clamp type process mounts
have no pressure-bearing housing of their own and, therefore, do not come under the
Pressure Equipment Directive as pressure or safety accessories (see EU Commission
Guideline A-08 and A-20).
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