Siemens SITRANS LR500 Series - Page 9

11.6.3 Wrong reading................................................................................................................. 167
12 Technical speci󹪝cations ..................................................................................................................... 169
12.1 Power.............................................................................................................................. 169
12.2 Temperature.................................................................................................................... 169
12.3 Performance.................................................................................................................... 171
12.4 Interface.......................................................................................................................... 172
12.5 Outputs ........................................................................................................................... 172
12.6 Construction.................................................................................................................... 172
12.7 Operating conditions ....................................................................................................... 173
12.7.1 Second line of defence (SLOD) ......................................................................................... 173
12.7.2 Environmental ................................................................................................................. 173
12.7.3 Process conditions ........................................................................................................... 174
12.7.4 Mechanical stress............................................................................................................. 174
12.7.5 Air purging system........................................................................................................... 174
12.8 Process ............................................................................................................................ 175
12.9 Certi󹪝cates and appr
ovals................................................................................................. 176
12.10 Communication ............................................................................................................... 177
12.11 Derating curves ............................................................................................................... 178
12.11.1 Temperature derating curves............................................................................................ 178
12.11.2 Temperature vs pressure derating curves.......................................................................... 180
13 Dimension drawings.......................................................................................................................... 187
13.1 LR510 threaded lens antenna........................................................................................... 187
13.2 LR530 󹪞anged encapsulated antenna ............................................................................... 189
13.3 LR550 polymeric horn antenna ........................................................................................ 192
13.4 LR580 󹪞anged lens antenna............................................................................................. 196
A Product documentation and support ................................................................................................ 199
A.1 Product documentation ................................................................................................... 199
A.2 Technical support............................................................................................................. 200
B Technical reference............................................................................................................................ 201
B.1 Principles of operation ..................................................................................................... 201
B.2 Echo processing............................................................................................................... 201
B.2.1 Echo processing............................................................................................................... 201
B.2.2 Echo selection ................................................................................................................. 202
B.2.2.1 Con󹪝dence ...................................................................................................................... 202
B.2.2.2 Auto false echo suppression and Custom TVT ................................................................... 202
B.2.2.3 Echo selection algorithms ................................................................................................ 202
B.3 Loop power ..................................................................................................................... 203
B.3.1 Loop power ..................................................................................................................... 203
Table of contents
SITRANS LR500 series with mA/HART
Operating Instructions, 03/2024, A5E51099898-AA 9