Endress+Hauser FTL62 Series, Руководство по функциональной безопасности

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Liquiphant FTL62 with electronic insert FEL67 Appendix
Hauser 19
~13 (0.5)
D
A
~12.5 (0.49)
C
D
~6 (0.24)
B
D
A0042269
 6 Switch point depending on the installation position. Unit of measurement mm (in)
A Installation from above
B1 Installation from below, plastic-coated tuning fork
B2 Installation from below, enamel-coated tuning fork
C
Installation from the side
D Switch point
For information on the switch point under reference operating conditions, see the
Technical Information.
Correct installation is a prerequisite for safe operation of the device.
8.1.3 Measurement function
Choice of operating modes:
• MIN detection
The measuring system is used to protect against a level that is too low (e.g., pump dry
running protection, protection against emptying or protection against insufficient filling).
In normal operation, the tuning fork is covered by liquid and the measuring system reports
the OK status. If the tuning fork is free, the device assumes the safe state and signals the
demand mode.
• MAX detection
The measuring system is used to protect against a level that is too high (e.g., overfill
prevention).
In normal operation, the tuning fork is not covered by liquid and the measuring system
reports the OK status. If the tuning fork is covered, the device assumes the safe state and
signals the demand mode.
8.1.4 Versions
The components Liquiphant FTL62 with electronic insert FEL67 and Nivotester FTL325P may
be operated in the versions described in the Functional Safety Manual for the Nivotester
FTL325P (FY01006F).
Version I, without the Nivotester, may not be used as a safety function in accordance with IEC
61508.