Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version:
Page:
2.0
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•
The environmental pressure has to be checked against the values given in the
Operating Instructions. Do not use outside the allowed ranges.
•
Functional grounding must be used for the stainless steel housing.
•
If using a different sensor as the Hauser ones like the CPS11D-8*
(SIL sensor), you have to make sure, that the sensor uses the exact same
calculations of the pH-value as the Hauser one. If not, the two
current outputs might differ systematically and your voter will detect the
difference and enter the safe state. To be sure, check with E Hauser,
if the sensor is to be used safely with the Liquiline M CM42 transmitter.
•
The used Orbisint CPS11D sensor must not be older than 3 years, starting
from the day of production. This is checked for by the Hauser
transmitter Liquiline M CM42.
•
Storage temperature: see operating instructions.
•
Environmental temperature: -20°C/-4°F up to 60°C/140°F
•
The LED on the display is never used to display any relevant state of the
system. It is not part of the safe path and therefore deactivated.
•
DAT modules are for safety reasons not allowed to be connected to the ports
of the display when in SIL mode and must be removed. This will be checked
by the software of the transmitter.
•
The service interface is turned off in SIL mode for safety reasons and switched
back on, when leaving SIL mode. It can be used for service personnel of
E Hauser to diagnose the system. It is not meant to be used in other
circumstances.
Therefore Memobase cannot be used with safe calibrations/adjustments. But
you can still do non safe calibrations in Classic mode using Memobase and use
these sensors for SIL measurements.
•
For safe calibrations/adjustments in the laboratory a SILtransmitter, e.g.
Liquiline M CM42 SIL, is necessary.
•
To store the settings (all parameters) of the used transmitter, you can use a
Copy-DAT (see operating instructions).
•
The system needs 15,5V to output all error currents (LO and HI) and all
measurement values. Below 9V the system can not guarantee that there is an
error current on the outputs. Between 9V and 15,5V the system is always able
to output the HI error current, but not the LO error current.
