KROHNE OPTITEMP TRA-TCA Plus EN - Manual (Page 4)

CONTENTS
4 www.krohne.com 01/2012 - 4000630301 - MA OPTITEMP TRA/TCA Plus R01
OPTITEMP TRA/TCA PLUS
4 Electrical connections 37
4.1 Safety instructions.......................................................................................................... 37
4.2 Grounding ....................................................................................................................... 37
4.3 Protection category ........................................................................................................ 37
4.4 Power supply .................................................................................................................. 37
5 Operation 38
5.1 Start-up........................................................................................................................... 38
5.2 Normal operation ........................................................................................................... 38
5.3 Faults and damage: reason and remedies .................................................................... 38
6 Service 40
6.1 Replacing the electronics............................................................................................... 40
6.2 Cleaning and maintenance............................................................................................. 40
6.3 Spare parts availability................................................................................................... 40
6.4 Availability of services .................................................................................................... 40
6.5 Returning the device to the manufacturer..................................................................... 40
6.5.1 General information.............................................................................................................. 40
6.5.2 Form (for copying) to accompany a returned device............................................................ 42
6.6 Disposal .......................................................................................................................... 42
7 Technical data 43
7.1 Measuring principle........................................................................................................ 43
7.1.1 Resistance thermometer...................................................................................................... 43
7.1.2 Thermocouples ..................................................................................................................... 44
7.2 Technical data tables ..................................................................................................... 45
7.3 Dimensions ..................................................................................................................... 49
7.3.1 Cable gland ........................................................................................................................... 49
7.3.2 Neck tubes ............................................................................................................................ 50
7.3.3 Lengths of thermowells........................................................................................................ 51
7.3.4 Thermowells: Diameter, wall thickness, tips....................................................................... 60
7.3.5 Sleeves .................................................................................................................................. 61
7.3.6 Flanges.................................................................................................................................. 62
7.4 Measuring accuracy ....................................................................................................... 64
7.5 Process connections ...................................................................................................... 65
7.6 Measuring range and permitted load ............................................................................ 66
7.6.1 Operating limits for multipart, welded thermowells ........................................................... 66
7.6.2 Operating limits for one-piece, straight bar stock thermowells ......................................... 67
7.6.3 Operating limits for one-piece, conical bar stock thermowells .......................................... 68
7.6.4 Operating limits for one-piece, reduced bar stock thermowells ........................................ 69
7.6.5 Operating limits for conical weld-in bar stock thermowells ............................................... 71
7.6.6 Operating limits for straight, bar stock weld-in thermowells ............................................. 71
7.7 Permissible temperatures ............................................................................................. 72
7.7.1 Connection head ................................................................................................................... 72
7.7.2 Unloaded thermowell and immersion tubes........................................................................ 72
7.8 Sensor response times .................................................................................................. 73
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