Proline Promag 300 HART Repair and error handling
Endress+Hauser 43
7.6 Verification criterion
If one of the test criteria from the test sequences described above is not satisfied, the device
may no longer be used as part of a safety instrumented system.
• The purpose of proof-testing is to detect dangerous undetected device failures (λ
du
).
• The impact of systematic errors on the safety function is partially covered by this test and
must be assessed separately.
• Systematic errors can be caused, for example, by substance properties, operating conditions
or buildup.
• As part of the visual inspection, for example, ensure that all of the seals and cable entries
provide adequate sealing.
8 Repair and error handling
8.1 Maintenance
For detailed information on maintenance, see the Operating Instructions.
Alternative monitoring measures must be taken to ensure process safety during
configuration, proof-testing and maintenance work on the device.
8.2 Repair
Repair means restoring functional integrity by replacing defective components.
Only original Endress+Hauser spare parts may be used for this purpose.
We recommend that you document the repair. This includes documenting the:
• Serial number of the device
• Date of the repair
• Type of repair
• Person who performed the repair
Components may be repaired/replaced by the customer's technical staff if original
Endress+Hauser spare parts are used (they can be ordered by the end user), and if the
relevant installation instructions are followed.
For detailed information on returns, see the Operating Instructions.
8.2.1 Replacing device components
The following components may be replaced by the customer's technical staff if genuine spare
parts are used and the appropriate installation instructions are followed:
• Sensor
• Transmitter without a sensor
• Display module
• Power unit
• Main electronics module
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