9.3.5.1
Introduction ..........................................................................................................................149
9.3.5.2
"Custom units" parameter ....................................................................................................150
9.3.5.3
9.3.6
Sensor calibration ................................................................................................................151
9.3.7
9.3.8
Diagnostics functions ...........................................................................................................154
9.3.8.1
9.3.8.2
Trend log ..............................................................................................................................157
9.3.8.3
Operating hours counter ......................................................................................................158
10
Functional Safety......................................................................................................................................159
10.1
Safety concept .....................................................................................................................159
10.1.1
10.1.2
10.1.3
Safety function .....................................................................................................................160
10.1.3.1
Device states........................................................................................................................162
10.1.3.2
10.1.4
10.1.5
Device mode ........................................................................................................................163
10.1.5.1
Validation .............................................................................................................................164
10.1.5.2
Safety-related parameters....................................................................................................165
10.1.5.3
10.2
10.2.1
10.2.2
10.3
10.3.1
10.3.2
10.4
10.5
10.6
Proof test..............................................................................................................................178
10.6.1
10.6.2
Documenting a proof test .....................................................................................................179
10.7
Repair and service ...............................................................................................................179
11
Service and maintenance .........................................................................................................................181
11.1
Basic safety instructions.......................................................................................................181
11.2
Cleaning ...............................................................................................................................182
11.2.1
Cleaning the enclosure ........................................................................................................182
11.2.2
11.3
11.3.1
Checking the seals...............................................................................................................184
11.3.2
Check cable glands..............................................................................................................185
11.3.3
Replacing spare parts ..........................................................................................................185
11.3.3.1
11.3.3.2
Replacing the display ...........................................................................................................185
11.3.3.3
11.4
Return procedure .................................................................................................................188
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
Table of contents
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