User's Manual

Table of contents
SITRANS LR250 (HART)
6 Operating Instructions, 01/2014, A5E32220602-AB
11.2 Performance .............................................................................................................................. 182
11.3 Interface .................................................................................................................................... 183
11.4 Mechanical ................................................................................................................................ 184
11.5 Environmental ........................................................................................................................... 186
11.6 Process ..................................................................................................................................... 186
11.7 Approvals .................................................................................................................................. 187
11.8 Programmer (infrared keypad) .................................................................................................. 189
12 Dimension drawings ............................................................................................................................. 191
12.1 Threaded horn antenna ............................................................................................................. 191
12.2 Threaded horn antenna with extension ..................................................................................... 194
12.3 Flanged horn antenna ............................................................................................................... 196
12.4 Flanged horn antenna with extension ....................................................................................... 198
12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only) ....................................................... 200
12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger) .............................................. 202
12.7 Threaded PVDF antenna .......................................................................................................... 204
12.8 Threaded connection markings ................................................................................................. 205
12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna .................................................. 206
12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna .................................... 208
12.11 Flat-Face flange ........................................................................................................................ 211
12.12 Process connection tag (pressure rated versions).................................................................... 214
A Appendix A: Technical reference .......................................................................................................... 215
A.1 Principles of operation ............................................................................................................... 215
A.2 Echo Processing ....................................................................................................................... 216
A.2.1 Process Intelligence .................................................................................................................. 216
A.2.2 Echo Selection .......................................................................................................................... 217
A.2.3 CLEF Range ............................................................................................................................. 220
A.2.4 Echo Threshold ......................................................................................................................... 220
A.2.5 Echo Lock.................................................................................................................................. 220
A.2.6 Auto False Echo Suppression ................................................................................................... 221
A.2.7 Measurement Range ................................................................................................................. 223
A.2.8 Measurement Response ........................................................................................................... 223
A.2.9 Damping .................................................................................................................................... 224
A.3 Analog Output ........................................................................................................................... 224
A.3.1 Sensor Mode ............................................................................................................................. 225
A.3.2 Current Output Function ............................................................................................................ 226
A.3.3 Loss of Echo (LOE) ................................................................................................................... 226