Endress+Hauser Liquiline M CM42 - 8 Notes on the Redundant Use of the Device for SIL; 9 Proof Test Protocol Example

Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version: Page:
2.0 63 of 72
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8 Notes on the redundant use of the device for SIL 3
Right now, this is not possible in homogenous redundancy. But you can use
inhomogeneous redundancy to reach SIL 3 using this device.
Redundant use of the E+H SIL2 measuring chain (Liquiline M CM42 SIL, CYK10 SIL,
Memosens SIL sensor) and one of another manufacturer is an option to reach a SIL3 pH
measuring chain.
9 Proof test protocol example
Application Specific Data
Company
Measuring point
Facility
Device type Liquiline M CM42, SIL
Serial number
Checked again the restrictions for usage O yes O no
Sensor calibration data used
slope [pH/mV]
zero point [pH]
Partial stroke test for current out used O yes O no
Temperature range check values
minimum [°C/°F]
maximum [°C/°F]
PFDavg value before proof test
PFDavg value after proof test
Date of last proof test
Date of next proof test (estimated)
Name of tester
Date
Signature