Siemens SITRANS P - Default Chapter; Table of Contents

Table of contents
1 Getting Started ...........................................................................................................................................11
1.1 Commissioning the device without display.............................................................................11
1.2 Commissioning the device with display..................................................................................12
2 Introduction.................................................................................................................................................15
2.1 Purpose of this documentation...............................................................................................15
2.2 Scope of validity of this document..........................................................................................15
2.3 Document history ...................................................................................................................15
2.4 Product compatibility ..............................................................................................................16
2.5 Checking the consignment.....................................................................................................16
2.6 Security information ...............................................................................................................16
2.7 Transportation and storage ....................................................................................................17
2.8 Notes on warranty ..................................................................................................................17
3 Safety information.......................................................................................................................................19
3.1 Precondition for use ...............................................................................................................19
3.1.1 Warning symbols on the device .............................................................................................19
3.1.2 Laws and directives................................................................................................................19
3.1.3 Conformity with European directives......................................................................................20
3.1.4 Classification according to the pressure equipment directive ................................................20
3.2 Requirements for special applications ...................................................................................21
3.3 Use in hazardous areas .........................................................................................................21
4 Description..................................................................................................................................................25
4.1 Area of application .................................................................................................................25
4.2 Structure.................................................................................................................................27
4.3 Nameplate layout ...................................................................................................................28
4.4 Functional principle ................................................................................................................30
4.4.1 Electronics..............................................................................................................................31
4.4.2 Measuring cell ........................................................................................................................32
4.4.2.1 Measuring cell for gauge pressure.........................................................................................33
4.4.2.2 Measuring cell for gauge pressure, front-flush membrane.....................................................34
4.4.2.3 Measuring cell for absolute pressure from the gauge pressure series ..................................34
4.4.2.4 Measuring cell for absolute pressure, front-flush membrane .................................................35
4.4.2.5 Measuring cell for absolute pressure from the differential pressure series............................36
4.4.2.6 Measuring cell for differential pressure and flow rate.............................................................37
4.4.2.7 Measuring cell for level ..........................................................................................................38
4.5 System configuration..............................................................................................................38
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC 3