KROHNE OPTIWAVE 5200C SIL - Manual (Page 11)

SPECIFICATION OF SAFETY FUNCTION
6
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OPTIWAVE 5200 C
www.krohne.com 02/2013 - 4001906202 - AD SIL OPTIWAVE 5200 R02 en
6.1 Preliminary requirements
6.2 Safety function definition
6.2.1 General notes
The device contains a safety function that agrees with the standard (document [N2]). This safety
function operates if there is a large difference between the level measurement and the level
shown as a current output.
If the device senses that there is a difference of more than 2.5% between the level measurement
and the level shown as a current output, then the current output changes to an error signal
(≤ 3.6 mA) in less than 30 seconds. The safety integrity level of this safety function is SIL2.
6.2.2 Limits of application
This version of the device has the restrictions that follow:
• Distance is measured in Direct mode Direct mode Direct mode Direct mode (only one product in the tank is permitted).
• Only the compact version (the signal converter is attached directly to the antenna) can be
used.
• It is a 2-wire loop-powered device.
• Use DN80 and DN100 Metallic Horn antenna only in stilling wells as specified in the handbook
(document [N1]).
For more data, refer to SIL-specific technical data on page 29.
WARNING!
The data in this supplement only contains the data applicable to the SIL approval. The technical
data for the standard version in the handbook (document [N1]) shall be valid in its current
version, provided that it is not rendered invalid or replaced by this supplement.
INFORMATION!
If menu item 2.4.5 ERROR DELAY = 0 s, then the current output changes to an error signal
(≤ 3.6 mA) in less than 10 seconds. If menu item 2.4.5 ERROR DELAY is more than 0 seconds,
then the current output changes to an error signal (≤ 3.6 mA) in 10 seconds + 2.4.5 ERROR
DELAY.