Siemens SITRANS P DS III - Default Chapter; Table of Contents

SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
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Table of contents
1 Introduction ........................................................................................................................................... 11
1.1 Purpose of this documentation .................................................................................................... 11
1.2 Product information ...................................................................................................................... 11
1.3 History .......................................................................................................................................... 11
1.4 Scope of the instructions .............................................................................................................. 12
1.5 Checking the consignment ........................................................................................................... 12
1.6 Transportation and storage .......................................................................................................... 13
1.7 Notes on warranty ........................................................................................................................ 13
2 Safety information ................................................................................................................................. 15
2.1 Precondition for use ..................................................................................................................... 15
2.1.1 Laws and directives ..................................................................................................................... 15
2.1.2 Conformity with European directives ........................................................................................... 16
2.2 Improper device modifications ..................................................................................................... 16
2.3 Requirements for special applications ......................................................................................... 17
2.4 Use in hazardous areas ............................................................................................................... 17
3 Description ............................................................................................................................................ 21
3.1 System configuration ................................................................................................................... 21
3.2 Application .................................................................................................................................... 22
3.3 Structure ....................................................................................................................................... 24
3.4 Nameplate layout ......................................................................................................................... 25
3.5 Measuring point label layout ........................................................................................................ 26
3.6 Principle of operation ................................................................................................................... 26
3.6.1 Overview of mode of operation .................................................................................................... 26
3.6.2 Operation of the electronics ......................................................................................................... 27
3.6.3 Principle of operation of the measuring cell ................................................................................. 28
3.6.3.1 Measuring cell for gauge pressure............................................................................................... 29
3.6.3.2 Measuring cell for differential pressure and flow rate .................................................................. 30
3.6.3.3 Measuring cell for level ................................................................................................................ 31
3.6.3.4 Measuring cell for absolute pressure from the differential pressure series ................................. 32
3.6.3.5 Measuring cell for absolute pressure from the gauge pressure series ........................................ 33
3.6.3.6 Measuring cell for gauge pressure, front-flush membrane .......................................................... 34
3.6.3.7 Measuring cell for absolute pressure, front-flush membrane ...................................................... 34
3.7 Remote seal ................................................................................................................................. 35
3.8 SIMATIC PDM .............................................................................................................................. 36
3.9 PROFIBUS ................................................................................................................................... 36