Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version:
Page:
2.0
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6.2.3
Proof test of the Orbisint CPS11D pH sensor
You need a transmitter, a Memosens cable and a Memosens sensor. All components
must be certified according to IEC 61508. You also need two buffer solutions, one with
pH 7.0 and the other with pH 4.0.
Note!
The proof test can be done in the laboratory or "in process".
The procedure of the proof test is as follows:
Navigate to the menu Setup – Functional Safety and deactivate “SIL meas
Mode” if switched on.
Enter the menu "Sensor Proof Test".
Read carefully the instructions given on the display and push the jog shuttle
button as requested.
After the proof test has been done, the result is displayed. If an error has been
detected, you are not allowed to use this sensor for any safety related
functions anymore.
The proof test has to be documented with date, tester and the result (see example in the
safety manual of the sensor).
This test detects approx. 90 % (proof test coverage) of all possible dangerous undetected
device failures.
Note!
The test forces the safety function of the sensor to execute.
