Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version:
Page:
2.0
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Very important!
Very carefully read the display during the proof test and only continue, if you have
finished exactly, what has been asked for on the display. If you for example put the
sensor in pH 7.0 instead of pH 4.0, this will leave the sensor in an almost unusable
configuration.
The steps of the proof test are:
All of the steps below have to be done successfully. Only steps A) to C) are done by the
proof test sequence. Step D) has to be done manually by you.
A)
Put electrode into pH 4.0
a.
Adjust sensor with special slope/zero point 1
b.
Sensor into pH 7.0
B)
Put electrode into pH 4.0
a.
Put electrode into pH 7.0
b.
Adjust sensor with special slope/zero point 2
c.
Sensor into pH 4.0
C)
Put electrode into pH 7.0
a.
Adjust sensor with a default slope/zero point
b.
Start measuring again.
D)
Do a safe calibration and adjustment with this sensor now.
Note!
In case you have escaped the proof test sequence or the proof test failed, because of a
"correctable error", the sensor is in an unusable state.
For safety reasons, to reset the sensor you have to do the complete proof test
successfully. Therefore try to start the proof test by putting the sensor as described
above in pH 4.0. If that does not work (you can stop the proof test by pushing the ESC
soft key, if after 120 seconds nothing happens on the display), you start with pH 7.0,
although the display says pH 4.0. If that worked, follow exactly the instructions given
on the display. If it still does not work, you have to change the sensor.
The following screenshots give an impression how it looks like on the display:
