
7.19 Static configuration data............................................................................................................126
7.20 Flow rate measurement (only differential pressure)..................................................................127
7.21 Diagnostic functions..................................................................................................................128
7.21.1 Overview....................................................................................................................................128
7.21.2 Operating hours counter............................................................................................................129
7.21.3 Calibration timer and service timer............................................................................................129
7.21.4 Min/max indicator......................................................................................................................130
7.21.5 Limit modules............................................................................................................................131
7.22 Simulation..................................................................................................................................133
7.22.1 Overview of simulation..............................................................................................................133
7.22.2 Simulation as fixed value...........................................................................................................134
7.22.3 Simulation with a ramp function.................................................................................................134
7.23 Limit monitor..............................................................................................................................134
8 Functional safety.......................................................................................................................................137
8.1 General safety instructions........................................................................................................137
8.1.1 Safety-instrumented system......................................................................................................137
8.1.2 Safety Integrity Level (SIL)........................................................................................................138
8.2 Device-specific safety information for single-channel operation (SIL 2)....................................140
8.2.1 Safety function...........................................................................................................................140
8.2.2 Settings......................................................................................................................................140
8.2.3 Requirements ...........................................................................................................................141
8.2.4 Behavior in case of faults..........................................................................................................142
8.2.5 Maintenance/Checking..............................................................................................................142
8.2.6 Safety characteristics................................................................................................................142
8.3 Device-specific safety information for redundant operation (SIL 3)...........................................143
8.3.1 Safety function...........................................................................................................................143
8.3.2 Requirements ...........................................................................................................................144
8.3.3 Settings......................................................................................................................................145
8.3.4 Behavior in case of faults..........................................................................................................146
8.3.5 Maintenance/Checking..............................................................................................................146
8.3.6 Safety characteristics................................................................................................................147
8.4 Add-on parts..............................................................................................................................147
8.4.1 Checking a device with add-on pneumatic block.......................................................................148
8.4.2 Checking a device with add-on remote seal..............................................................................148
9 Commissioning.........................................................................................................................................149
9.1 Basic safety instructions............................................................................................................149
9.2 Introduction to commissioning...................................................................................................150
9.3 gauge pressure, absolute pressure from the differential pressure series and absolute pressure
from the gauge pressure series.................................................................................................151
9.3.1 Commissioning for gases..........................................................................................................151
9.3.2 Commissioning with steam or liquid..........................................................................................152
9.4 Differential pressure and flow rate.............................................................................................153
9.4.1 Safety notes for commissioning with differential pressure and flow rate...................................153
9.4.2 Commissioning in gaseous environments.................................................................................154
9.4.3 Commissioning for liquids..........................................................................................................155
Table of contents
SITRANS P, DS III series with HART
6 Operating Instructions, 09/2012, A5E00047092-08
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