11.5 Disposal ...............................................................................................................................188
12 Diagnostics and troubleshooting ..............................................................................................................189
12.1 Device status symbols .........................................................................................................189
12.2 Diagnostic messages ...........................................................................................................192
12.3 Troubleshooting ...................................................................................................................197
13 Technical data ..........................................................................................................................................199
13.1 Input .....................................................................................................................................199
13.1.1 Gauge pressure ...................................................................................................................199
13.1.2 Gauge pressure with front-flush diaphragm .........................................................................200
13.1.3 Gauge pressure from the differential pressure series ..........................................................201
13.1.4 Absolute pressure from the gauge pressure series .............................................................202
13.1.5 Absolute pressure with front-flush diaphragm......................................................................203
13.1.6 Absolute pressure from the differential pressure series.......................................................204
13.1.7 Differential pressure and flow...............................................................................................206
13.1.8 Level.....................................................................................................................................207
13.2 Measuring accuracy of SITRANS P320 ...............................................................................208
13.2.1 Reference conditions ...........................................................................................................208
13.2.2 Effect of auxiliary power supply............................................................................................208
13.2.3 Gauge pressure ...................................................................................................................208
13.2.4 Gauge pressure from the differential pressure series ..........................................................210
13.2.5 Absolute pressure from gauge and differential pressure series...........................................211
13.2.6 Absolute pressure with front-flush diaphragm......................................................................212
13.2.7 Gauge pressure with front-flush diaphragm .........................................................................213
13.2.8 Differential pressure and flow...............................................................................................214
13.2.9 Level.....................................................................................................................................217
13.3 Measuring accuracy of SITRANS P420 ...............................................................................218
13.3.1 Reference conditions ...........................................................................................................218
13.3.2 Effect of auxiliary power supply............................................................................................218
13.3.3 Gauge pressure ...................................................................................................................218
13.3.4 Gauge pressure from the differential pressure series .........................................................219
13.3.5 Absolute pressure from gauge and differential pressure series...........................................221
13.3.6 Absolute pressure with front-flush diaphragm......................................................................222
13.3.7 Gauge pressure with front-flush diaphragm .........................................................................223
13.3.8 Differential pressure and flow...............................................................................................223
13.3.9 Level.....................................................................................................................................227
13.4 Output ..................................................................................................................................228
13.5 Operating conditions ............................................................................................................228
13.6 Vibration resistance..............................................................................................................233
13.7 Construction .........................................................................................................................234
13.8 Torques ................................................................................................................................238
13.9 Display, keys and auxiliary power ........................................................................................238
13.10 Certificates and approvals....................................................................................................239
Table of contents
SITRANS P320/P420 with 4 to 20 mA/HART
8 Operating Instructions, 11/2019, A5E44852162-AC
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