Table of contents
1 Introduction...................................................................................................................................................9
1.1 Purpose of this documentation......................................................................................................9
1.2 Product information.......................................................................................................................9
1.3 History...........................................................................................................................................9
1.4 Scope of the instructions.............................................................................................................10
1.5 Checking the consignment..........................................................................................................10
1.6 Transportation and storage.........................................................................................................11
1.7 Notes on warranty.......................................................................................................................11
2 Safety instructions......................................................................................................................................13
2.1 Precondition for use.....................................................................................................................13
2.1.1 Laws and directives.....................................................................................................................13
2.1.2 Conformity with European directives...........................................................................................13
2.2 Use in hazardous areas...............................................................................................................14
3 Description..................................................................................................................................................17
3.1 System configuration...................................................................................................................17
3.2 Application range.........................................................................................................................18
3.3 Structure......................................................................................................................................19
3.4 Nameplate layout.........................................................................................................................21
3.5 Measuring point label layout........................................................................................................22
3.6 Functional principle......................................................................................................................23
3.6.1 Overview of mode of operation....................................................................................................23
3.6.2 Operation of the electronics.........................................................................................................23
3.6.3 Measuring cell operation.............................................................................................................24
3.6.3.1 Measuring cell for gauge pressure..............................................................................................25
3.6.3.2 Measuring cell for differential pressure and flow rate..................................................................26
3.6.3.3 Measuring cell for level................................................................................................................27
3.6.3.4 Measuring cell for absolute pressure from the differential pressure series.................................28
3.6.3.5 Measuring cell for absolute pressure from the gauge pressure series........................................29
3.6.3.6 Measuring cell for gauge pressure, front-flush membrane..........................................................29
3.6.3.7 Measuring cell for absolute pressure, front-flush membrane......................................................30
3.7 Remote seal................................................................................................................................31
3.8 SIMATIC PDM.............................................................................................................................31
4 Installing/mounting......................................................................................................................................33
4.1 Basic safety instructions..............................................................................................................33
4.1.1 Installation location requirements................................................................................................37
4.1.2 Proper mounting..........................................................................................................................38
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 3
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