Siemens SITRANS Probe LU Operating Instructions Manual page 5

Communication Troubleshooting ......................................................................................................81
Generally: .......................................................................................................................................81
Specifically: ...................................................................................................................................81
General Fault Code ...............................................................................................................................82
Operation Troubleshooting .................................................................................................................85
Appendix E: Maintenance ...............................................................................................87
Unit Repair and Excluded Liability ....................................................................................................87
Appendix F: Technical References ................................................................................89
Principles of operation .........................................................................................................................89
Blanking Distance .................................................................................................................................89
TVT (Time Varying Threshold) curves ..............................................................................................89
Auto False-Echo Suppression ..................................................................................................89
Open Channel Monitoring (OCM) ......................................................................................................91
Failsafe .....................................................................................................................................................91
Chemical compatibility .........................................................................................................................92
Startup Behavior ...................................................................................................................................92
Appendix G: Hazardous area installations ..................................................................93
Wiring Details .........................................................................................................................................93
Intrinsically Safe Model .............................................................................................................93
FM/CSA ..........................................................................................................................................94
EU Equivalency .......................................................................................................................... 94
Loop Voltage versus Loop Resistance ...................................................................................95
IS Safety Barrier Selection .......................................................................................................95
How to select a passive barrier for SITRANS Probe LU ................................................. 95
PLC Input Modules.................................................................................................................... 96
Passive Shunt Diode Barriers ............................................................................................... 96
Active barriers (repeating barriers)...................................................................................... 96
FM Intrinsically safe connection drawing .......................................................................................99
CSA Intrinsically Safe connection drawing ................................................................................. 100
................................................................................................................................................................. 100
FM Class 1, Div. 2 connection drawing ..........................................................................................101
Appendix H: Firmware Revision History .................................................................... 103
Glossary ............................................................................................................................ 105
Index .................................................................................................................................. 109
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