Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version:
Page:
2.0
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2.3
Restrictions for the use in safety related applications
The given environmental conditions have to be obeyed at all times. All remarks in the
CM42 Operating Manual and Installation Instructions (see chapter 1.4) have to be
obeyed.
Additional mandatory restrictions for the use in safety related applications:
•
Installation, commissioning, operation and maintenance of the safety
measuring system must only be carried out by trained technical personnel.
The technical personnel must be authorized to perform the tasks at the safety
relevant system by the owner-operator.
•
Use of the device at a maximum average environment temperature of
60°C/140°F (the calculation of the failure rates have been based on this
assumption).
•
It has to be checked, that at all times a SIL capable cable is used (e.g. CYK10
SIL - look for the nameplate with the SIL- and TÜV logo). This can not be
checked by the transmitter or the sensor in operation.
•
Before going into operation, it has to be checked, if any metal masses are close
to the transmitter or the sensor head, which can influence the inductive
transmission of the cable and the transmitter.
•
The connections of the cable to the transmitter and the sensor have to be
checked thoroughly before going into operational state.
•
The environmental conditions from IEC 61326-3-2 have to be obeyed.
•
The voter and its configuration have to be checked for, before going into
operation. A 2oo2 voter must be used.
•
The connection of the Memosens cable to the transmitter has to be carefully
checked, see CM42 installation instructions.
•
It is not allowed to use the system in a radioactive environment (apart from
natural radioactivity).
•
Strong magnetic fields are not allowed in the neighborhood of the device.
•
The device must be protected against lightning or strong electromagnetic
disturbances.
•
A shield connector at the transmitter must be used. You have to use two-wire
cabling shielded on both sides, "hard grounding".
•
The display is NOT safe, even not in SIL mode.
•
Please check the polarity of the connections carefully.
•
If used outside, the weather protection must be used.
