Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version: Page:
2.0
26 of 72
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3 Installation
3.1 Mounting, wiring and commissioning
The mounting, wiring and commissioning of the device is described in the Operating
Instructions and TI of the device (see chapter 1.4).
All remarks in chapter 2.3 have to be obeyed.
3.2 Orientation
There are no restrictions to the orientation of the device, except the restrictions in
chapter 2.3 and the ones stated in the documentation (see chapter 1.4) and the
installation manual.
4 Operation
All screenshots shown in this chapter are done using an English version of the Liquiline
M CM42. Depending on your language the screen might differ slightly.
4.1 Basics of safety relevant operations
For all safety relevant operations: The SETUP menu has an additional item called
"Functional safety". This has to be used for almost all safety relevant operations.
To enter or leave the SIL mode you need the user management to be switched on and
you need an expert password, which is not set to "0000". See the manual of the
Liquiline M transmitter on how to do this.
The CM42 SIL software in SIL mode slightly differs from the standard software (Classic
mode): For safety reasons the only possible calibration is a 2 point pH calibration, which
can be only carried out using E+H buffers pH 7.00 and pH 4.00 (only exactly in this
sequence) and using automatic temperature compensation. The only temperature
calibration is the one-point calibration.
4.2 Calibrating the measuring point
Calibration of the transmitter is not necessary, but calibration of the used sensor is
mandatory. Please see Operating Instructions part 2 of Liquiline M CM42 and chapter
4.7.1.
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