KROHNE LT40 C - Default Chapter; Table of Contents

CONTENTS
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www.krohne.com 10/2021 - 4009051601 - AD UKEX LT40 R01 en
LT40 C/F
1 General safety information 4
1.1 Scope of the document..................................................................................................... 4
1.2 Device description
............................................................................................................ 4
1.3 Standards and approvals
.................................................................................................. 4
1.4 Device categories
............................................................................................................. 5
1.4.1 Ex ia-approved devices ........................................................................................................... 5
1.4.2 Ex db-approved devices .......................................................................................................... 5
1.5 Nameplate ........................................................................................................................ 6
2 Installation 7
2.1 Precautions....................................................................................................................... 7
2.1.1 General notes.......................................................................................................................... 7
2.1.2 Special conditions
................................................................................................................... 7
2.1.3 Electrostatic discharge........................................................................................................... 8
2.2 Operating conditions ........................................................................................................ 9
2.2.1 General notes.......................................................................................................................... 9
2.2.2 Ambient and service temperatures........................................................................................ 9
2.2.3 Ambient and process temperatures....................................................................................... 9
2.2.4 Compact version (LT40 C)..................................................................................................... 10
2.2.5 Remote version (LT40 F)
....................................................................................................... 14
3 Electrical connections 19
3.1 General notes ................................................................................................................. 19
3.2 Terminal compartment
.................................................................................................. 19
3.2.1 How to open the terminal compartment .............................................................................. 19
3.2.2 How to close the terminal compartment ............................................................................. 20
3.3 Terminal tightening capacity.......................................................................................... 20
3.4 Equipotential bonding system
........................................................................................ 21
3.5 Ex i version of the reed-chain level transmitter
............................................................ 22
3.5.1 How to connect the electrical cables ................................................................................... 22
3.5.2 Maximum intrinsically safe values for the electrical circuit................................................ 22
3.6 Ex d version of the reed-chain level transmitter........................................................... 23
3.6.1 How to connect the electrical cables ................................................................................... 23
3.7 Electrical data (functional values).................................................................................. 23
4 Start-up 24
5 Service 25
5.1 Periodic maintenance..................................................................................................... 25
5.2 Repairs
............................................................................................................................ 25
5.3 Cleaning
.......................................................................................................................... 25