VEGA VEGAPULS series 60 Recurring function test - Manual (Page 4)

Make sure that also a later sensor documentation is possible. This
sensor documentation of a recurring function test must be at least 6
months old.
If you created no sensor documentation during setup, you can check
the sensor only at a detection rate of 88 % of all dangerous undetected
failures.
The remaining dangerous undetected failures are in this case 32 FIT.
FIT = Failure In Time (1 FIT = 1 failure/10
9
h)
Please note the Ex-specific safety information for installation and
operation in Ex areas. These safety instructions are part of the scope
of delivery and come with the Ex-approved instruments.
Warning:
The recurring function test influences connected devices. Take note
that downstream devices may be activated during the test.
Information:
Proceed according to the specified, recommended sequence of these
instructions to isolate possible device failures systematically.
Information:
Document the recurring function test, for example, in the test protocol
in the supplement. To facilitate the recording and for further function
tests, we recommend to copy the empty test protocol before
completing it.
This supplementary information manual can be downloaded from our
download section.
The recurring function test cannot replace the prescribed test
according to WHG (Water Resources Act).
Fault detection rate λ
du
88 %
4 Recurring function test • for VEGAPULS series 60
1 About this document
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