Siemens SITRANS T4200, Руководство по эксплуатации

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Table of contents
SITRANS TH200/TH300
4
Operating Instructions, 06/2010, A5E00393069-03
6 Operation................................................................................................................................................. 31
6.1
Operating the SITRANS TH200/TH300 and assigning parameters to it .................................... 31
6.2 Operation of the SITRANS TH200 with PC/laptop and modem ................................................. 31
6.3 Operation of the SITRANS TH300.............................................................................................. 33
6.3.1 Operation with the HART modem and SIMATIC PDM ............................................................... 33
6.3.2 Operation with HART communicator .......................................................................................... 34
7 Functional safety...................................................................................................................................... 35
7.1
General safety information.......................................................................................................... 35
7.1.1 Safety-instrumented system........................................................................................................ 35
7.1.2 Safety Integrity Level (SIL).......................................................................................................... 37
7.2 Device-specific safety instructions .............................................................................................. 39
7.2.1 Safety function ............................................................................................................................ 39
7.2.2 Requirements.............................................................................................................................. 39
7.2.3 Settings ....................................................................................................................................... 40
7.2.4 Behavior in case of faults............................................................................................................ 41
7.2.5 Maintenance/Checking................................................................................................................ 41
7.2.6 Safety characteristics.................................................................................................................. 42
8 Commissioning ........................................................................................................................................ 43
8.1
Commissioning............................................................................................................................ 43
8.2 LED operating indicator............................................................................................................... 43
9 Functions ................................................................................................................................................. 45
9.1
General information..................................................................................................................... 45
9.2 Broken wire monitoring ............................................................................................................... 47
9.3 Short-circuit monitoring ............................................................................................................... 47
9.4 Line compensation ...................................................................................................................... 47
9.5 Type of characteristic curve (rising or falling) ............................................................................. 47
9.6 Measured value offset................................................................................................................. 48
9.7 Sensor factor............................................................................................................................... 48
9.8 Cold junction compensation with thermocouples........................................................................ 48
9.9 Calculation of differential value/mean value ............................................................................... 49
9.10 Electrical damping....................................................................................................................... 49
9.11 Current sensor function (only in SITRANS TH300) .................................................................... 49
9.12 Alarm current............................................................................................................................... 50
9.13 Sensor calibration ....................................................................................................................... 50
9.13.1 Sensor calibration (one point) ..................................................................................................... 50
9.13.2 Sensor calibration (two point)...................................................................................................... 51
9.14
Current sensor calibration (digital-to-analog trim)....................................................................... 53
9.14.1 Function....................................................................................................................................... 53
9.14.2 Application example: Current input calibration at 4 mA and 20 mA ........................................... 54
9.15
Special characteristic curve ........................................................................................................ 55
9.16 Factory parameters ..................................................................................................................... 58