Siemens SITRANS FC620 Operating Instructions Manual page 3

8.7 Accuracy of temperature ................................................................................................................... 33
8.8 Repeatability ..................................................................................................................................... 34
8.9 Calibration conditions........................................................................................................................ 34
8.9.1 Mass flow calibration and density adjustment ..................................................................... 34
8.9.2 Density calibration................................................................................................................ 35
8.9.3 Calibration for gases ............................................................................................................ 35
8.10 Process conditions ............................................................................................................................ 36
8.10.1 Process pressure effect ....................................................................................................... 36
8.10.2 Process fluid temperature effect .......................................................................................... 36
9 Operating conditions ................................................................................................................................ 39
9.1 Process conditions ............................................................................................................................ 39
9.1.1 Process fluid temperature range.......................................................................................... 39
9.1.2 Density ................................................................................................................................. 40
9.1.3 Pressure............................................................................................................................... 40
9.1.4 Insulation and heat tracing................................................................................................... 46
9.1.5 Secondary containment ....................................................................................................... 47
9.2 Ambient conditions............................................................................................................................ 48
9.2.1 Allowed ambient temperature for sensor ............................................................................. 49
9.2.2 Temperature specification in hazardous areas .................................................................... 54
10 Mechanical specification .......................................................................................................................... 61
10.1 Design ............................................................................................................................................... 61
10.2 Material ............................................................................................................................................. 63
10.2.1 Sensor.................................................................................................................................. 63
10.2.2 Transmitter........................................................................................................................... 63
10.2.3 Nameplates.......................................................................................................................... 64
10.2.4 Heat tracing.......................................................................................................................... 65
10.3 Process connections, dimensions and weights of sensor................................................................. 66
10.4 Transmitter dimensions and weights................................................................................................. 84
11 Transmitter................................................................................................................................................. 86
11.1 Electrical interfaces ........................................................................................................................... 87
11.1.1 Analog inputs and outputs ................................................................................................... 87
11.1.1.1 Analog outputs ..................................................................................................................... 87
11.1.1.2 Analog inputs ....................................................................................................................... 89
11.1.1.3 Analog output specification .................................................................................................. 90
11.1.2 Digital inputs and outputs .................................................................................................... 90
11.1.2.1 Digital outputs ...................................................................................................................... 90
11.1.2.2 Digital inputs ........................................................................................................................ 94
11.1.3 HART ................................................................................................................................... 94
11.1.4 Modbus ................................................................................................................................ 96
11.1.5 PROFIBUS PA..................................................................................................................... 96
11.2 Power supply..................................................................................................................................... 98
11.3 Cable specifications .......................................................................................................................... 98
12 Installation ................................................................................................................................................. 99
12.1 Location and position of installation .................................................................................................. 99
12.1.1 Sensor installation position .................................................................................................. 99
12.2 Installation instructions...................................................................................................................... 100
14.09.2023A5E52748375-AA, 2023/09
Table of contents
3 / 194