Operating Instructions

Table Of Contents
12.15 Hygienic encapsulated antenna (DN80 nozzle/slotted nut to DIN 11851) ..........................198
12.16 Hygienic encapsulated antenna (DN100 nozzle/slotted nut to DIN 11851) ........................199
12.17 Hygienic encapsulated antenna (DN50 aseptic slotted nut to DIN 11864-1) ......................200
12.18 Hygienic encapsulated antenna (DN80 aseptic slotted nut to DIN 11864-1) ......................201
12.19 Hygienic encapsulated antenna (DN100 aseptic slotted nut to DIN 11864-1) ....................202
12.20 Hygienic encapsulated antenna (DN50 aseptic flange to DIN 11864-2)..............................203
12.21 Hygienic encapsulated antenna (DN80 aseptic flange to DIN 11864-2)..............................204
12.22 Hygienic encapsulated antenna (DN100 aseptic flange to DIN 11864-2)............................205
12.23 Hygienic encapsulated antenna (DN50 aseptic clamp to DIN 11864-3) ..............................206
12.24 Hygienic encapsulated antenna (DN80 aseptic clamp to DIN 11864-3) ..............................207
12.25 Hygienic encapsulated antenna (DN100 aseptic clamp to DIN 11864-3) ............................208
12.26 Hygienic encapsulated antenna (Tuchenhagen Type N) .....................................................209
12.27 Hygienic encapsulated antenna (Tuchenhagen Type F) .....................................................210
12.28 Threaded PVDF antenna .....................................................................................................211
12.29 Threaded connection markings............................................................................................212
12.30 Raised-Face flange .............................................................................................................213
12.31 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna ...............................215
12.32 Flat-Face flange ...................................................................................................................217
12.33 Aseptic/hygienic flange DN50, DN80, DN100 for DIN 11864-2 ..........................................219
12.34 Process connection tag (pressure rated versions)...............................................................221
A Appendix A: Technical reference .............................................................................................................223
A.1 Principles of operation..........................................................................................................223
A.2 Echo Processing ..................................................................................................................223
A.2.1 Process Intelligence .............................................................................................................223
A.2.2 Echo Selection .....................................................................................................................224
A.2.3 CLEF Range ........................................................................................................................227
A.2.4 Echo Threshold ....................................................................................................................227
A.2.5 Echo Lock ...........................................................................................................................227
A.2.6 Auto False Echo Suppression..............................................................................................228
A.2.7 Measurement Range............................................................................................................229
A.2.8 Measurement Response ......................................................................................................229
A.2.9 Damping...............................................................................................................................230
A.3 Analog Output ......................................................................................................................230
A.3.1 Sensor Mode........................................................................................................................231
A.3.2 Current Output Function.......................................................................................................231
A.3.3 Loss of Echo (LOE)..............................................................................................................232
A.3.4 Fail-safe Mode .....................................................................................................................232
A.4 Maximum Process Temperature Chart ................................................................................233
A.5 Process Pressure/Temperature derating curves..................................................................234
Table of contents
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 7