Statox 503 Control Module
Issue 10 / 2018 Page
41
of
46
Installation and Parameter Settings
In order to maintain the specified PFD and SFF rates, the following measures must be taken!
An external alarm device must be connected to SF relay!
The output signal in the service mode must be set to 2 mA, in order to differentiate between service and
measuring mode.
The specifications for the ambience must be observed.
The IP rating of the housing must be observed.
Schedule Maintenance (Prooftest)
The following procedures must be performed within a prooftest interval:
Visual inspection for damage and pollution.
Cables and plugs must make good contact.
Functional test as described in chapter 8.1.
Observe the recommendations for maintenance and cleaning in chapter 11.
Repair and Spare Parts
The instrument has no parts serviceable by the user.
Failure Rates and Safe Failure Fraction
These parameters have been achieved in a FMEDA hardware-assessment, performed by SGS-TÜV Saar
GmbH (Report No. M0PE0001):
Instrument
Safety function
λ
s
[FIT]
λ
du
[FIT]
λ
dd
[FIT]
SFF [%]
Statox 503,
operating as
Control Module
SF1
265,5
47,0
612,0
94,9
SF2
296,0
45,8
607,4
95,2
SF3
252,8
52,2
629,4
94,4
SF4
283,4
51,0
624,9
94,7
FIT: Failures in Time (10
-9
failures per hour)
SFF: Safe Failure Fraction
!
