Liquiphant M FTL50 / FTL51 Operating Instructions
Endress+Hauser 3
1 Safety Instructions
Safe and secure operation of the unit can only be guaranteed if the operating instructions and all
safety notes are read, understood and followed.
1.1 Approved usage
The Liquiphant M FTL50 and FTL51 is designed for level limit detection in liquids. If used incor-
rectly, it is possible that application-related dangers may arise. The level limit switch Liquiphant M
FTL50 and 51 may be installed, connected, commissioned, operated and maintained by qualified
and authorized personnel only, under strict observance of these operating instructions, any relevant
standards, legal requirements, and, where appropriate, the certificate.
1.2 Safety pictograms and symbols
Safe and reliable operation of this unit can only be guaranteed if the safety hints and warnings in
these operating instructions are followed. The safety hints in these instructions are highlighted using
the following symbols:
"
Caution!
This symbol indicates activities and actions that, if followed incorrectly, could lead to faulty opera-
tion or even damage to the unit.
!
Note!
This symbol indicates activities and actions that, if followed incorrectly, could have an indirect influ-
ence on the unit operation or could lead to an unforeseen unit reaction.
0-
Hazardous area, certified equipment!
If this character is shown on the unit, then it may be operated in hazardous areas.
.
Non-hazardous area!
This symbol identifies the non-hazardous areas in these instructions. Units that operate in the non-
hazardous areas but that are connected to the hazardous areas must also be certified.
1.3 Handling
Hold by housing, flange or
extension tube
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