Siemens SITRANS LR250 Operating Instructions Manual page 9

12.26 Raised-Face flange per EN 1092-1 for flanged horn antenna ................................................... 219
12.27 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna..................................... 221
12.28 Flat-Face flange ......................................................................................................................... 224
12.29 Aseptic/hygienic flange DN50, DN80, DN100 for DIN 11864-2 ................................................. 227
12.30 Process connection tag (pressure rated versions) .................................................................... 230
A Appendix A: Technical reference ......................................................................................................... 231
A.1 Principles of operation ............................................................................................................... 231
A.2 Echo processing......................................................................................................................... 232
A.2.1 Process Intelligence ................................................................................................................... 232
A.2.2 Echo Selection ........................................................................................................................... 232
A.2.3 CLEF Range .............................................................................................................................. 235
A.2.4 Echo Threshold .......................................................................................................................... 236
A.2.5 Echo Lock .................................................................................................................................. 236
A.2.6 Auto False Echo Suppression .................................................................................................... 236
A.2.7 Measurement Range ................................................................................................................. 238
A.2.8 Measurement Response ............................................................................................................ 239
A.2.9 Damping ..................................................................................................................................... 239
A.2.10 Loss of Echo (LOE) .................................................................................................................... 240
A.2.10.1 LOE Timer .................................................................................................................................. 240
A.2.10.2 Fail-safe Behavior ...................................................................................................................... 240
A.3 Maximum Process Temperature Chart ...................................................................................... 242
A.4 Process Pressure/Temperature Derating Curves ...................................................................... 243
A.4.1 Pressure Equipment Directive, PED, 97/23/EC ......................................................................... 244
A.4.2 Horn antenna ............................................................................................................................. 244
A.4.3 Flanged horn antenna ................................................................................................................ 245
A.4.4 Flanged encapsulated antenna .................................................................................................. 250
A.4.5 PVDF antenna............................................................................................................................ 252
A.4.6 Hygienic encapsulated antenna ................................................................................................. 253
B Appendix B: PROFIBUS PA profile structure ....................................................................................... 257
B.1 PROFIBUS Level Device Design ............................................................................................... 257
B.2 Block Model ................................................................................................................................ 257
B.2.1 Description of the blocks ............................................................................................................ 258
B.2.1.1 Transducer Block function groups ............................................................................................. 258
B.2.1.2 How the transducer block works: ............................................................................................... 259
B.2.1.3 Analog Input Function Blocks 1 and 2 ....................................................................................... 261
C Appendix C: Communications via PROFIBUS ..................................................................................... 265
C.1 Device configuration .................................................................................................................. 265
C.1.1 SIMATIC PDM ............................................................................................................................ 265
C.1.1.1 Electronic Device Description .................................................................................................... 265
C.2 Network configuration ................................................................................................................ 265
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
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