Proservo NMS80/81/83
Endress+Hauser 31
Proof-testing
System-specific data
Company
Measuring point/TAG no.
Facility
Device type/Order code
Serial number of device
Name
Date
Access code (if individual to each device)
Locking code used SIL 7452
Signature
Device-specific commissioning parameters
Upper density
Process condition
High stop level
Low stop level
Empty
Tank reference height
Proof-test protocol
Test step Set point Actual value
1. Current value 1
2. Current value 2
3. Current value 3 (if necessary)
4. Current value 4 (if necessary)
5. Current value 5 (if necessary)
Resistance value
Notes on the redundant
configuration of multiple
sensors
This section provides additional information regarding the use of homogeneous redundancy sensors
e.g. 1oo2 or 2oo3 architectures.
The common cause factors ß and ß
D
indicated in the table below are minimum values for the
Micropilot. These must be used when designing the sensor subsystem.
Minimum value ß with homogeneous redundant use 5%
Minimum value ß
D
with homogeneous redundant use 2%
The device meets the requirements for SIL 3 in homogeneous redundancy.
Please note the following when carrying out the proof-test: If an error is detected in one of the
redundantly operated devices, the other devices must be checked to see if there is the same error.
Further information
General information on functional safety (SIL) is available at:
www.de.endress.com/SIL (Germany) or www.endress.com/SIL (English) and in the Competence
Brochure CP01008Z/11 "Functional Safety in the Process Industry- Risk Reduction with Safety
Instrumented Systems".
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