Lamtec F200K2 IR-1, Safety Manual

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4 Operation
4 Operation
During operation the device must not be deactivated or bypassed. The operator must be fa-
miliar with the displayed information of the device and the measures to be executed in the
moment of any signalized disturbance. The information in the instruction manual must be
regarded.
Only suitable elements and devices must be connected, also for the commission of the device
(see chapter
2.5 Additional Components
).
WARNING!
Failures must be reported to LAMTEC as soon as possible.
DANGER!
Danger to life and material: Do not put the safety loop out of service
4.1 Proof Test
The "Proof Test Interval" T
1
is equivalent to the product`s mission or life time. There are no
components or elements used that can be set into an "as new condition" by a proof test of
the device.
Nevertheless, a proof test can ensure proper operation and decrease the average probability
of dangerous failure on demand (PFD
AVG
) during the defined mission time.
According to DIN EN 61508:2011-6, the PFD
AVG
can be calculated by the use of a proof test
coverage (PTC, proportion of detectable unsafe failures through a proof test), a proof test
interval (T
1
) and a request interval of the safety function (T
2 IBD
).
4.2 Proof Test Calculation and PTC
The PFD
AVG
can be calculated with the formulas of the DIN EN 61508-6:2011, B.3.2.5.
Exemplarily the calculation is done with a request interval (T
2 IBD
) of 1,2,3,4,5 and 10 years
and a proof test interval (T
1
) of 1 year.
The F200K the following PTCs are calculated:
– PTC = 70% for a basic proof test (see chapter 4.3) of the device
– PTC = 98% for a advanced proof test of the device by LAMTEC
– PTC = 100% exchange with a new device
T1= 1 year
T2 IBD [a]
PTC 70%
PFD
AVG
PTC 98%
PFD
AVG
PTC 100%
PFD
AVG
1 6,4E-06 6,4E-06 6,4E-06
2 8,7E-06 7,1E-06 6,4E-06
3 1,1E-05 7,7E-06 6,4E-06
4 1,3E-05 8,3E-06 6,4E-06
5 1,6E-05 9,0E-06 6,4E-06
10 2,8E-05 1,2E-05 6,4E-06