Other Applicable Documents And Papers; Zirconia Probe As Part Of The Safety Function; System; Device-Specific Data Related To Functional Safety - ABB Endura AZ20 Manual

E N D U R A A Z 2 0 & A Z 3 0 | OX YG E N A N A LY Z E R | S I/A Z 2 0/A Z 3 0 - E N R E V. A
4 Other applicable documents and
papers
Table 2 AZ20 reference documents
Data Sheet
Endura AZ20 oxygen analyser
Combustion Gas Analysis
Maintenance Guide
Endura AZ20 oxygen analyser
Combustion Gas Analysis
User Guide
Endura AZ20 oxygen analyser
Combustion Gas Analysis
Manual
Endura AZ20 oxygen analyser
Combustion Gas Analysis
Table 3 AZ30 reference documents
Data Sheet
Endura AZ30 oxygen analyser
Combustion Gas Analysis
Maintenance Guide
Endura AZ30 oxygen analyser
Combustion Gas Analysis
User Guide
Endura AZ30 oxygen analyser
Combustion Gas Analysis
Programming Guide
Endura AZ30 oxygen analyser
Combustion Gas Analysis
5 Zirconia probe as part of the
safety function system
The AZ20 or AZ30 transmitter generates an analog signal (4 to
20 mA) proportional to the oxygen % content. The analog signal
DS/AZ20-EN is fed to a downstream logics unit such as a PLC or a limit signal
generator, and is monitored for exceeding a specified
maximum or minimum value.
IM/AZ20M-EN
The following elements of the detector are considered to be
within the boundary of the safety system covered in this
IM/AZ20P-EN
manual:
• AZ20 or AZ30 probe
IM/AZ20E-EN
• AZ20 or AZ30 transmitter
• Interconnecting cable (only applicable to remote transmitter
versions)
The safe operation of anything else beyond the above
DS/AZ30-EN
components falls outside the scope of this document.
Note:
MI/AZ30M-EN
HART is not considered part of the SIL output
OI/AZ30P-EN
Device-specific data related to functional
safety
COI/AZ30E-EN
Table 4 Device-specific data
Device type
Type of assessment
Hardware type tolerance
Component type

Failure rates

Table 5 Failure rates
Safety integrity
"hazardous" failure
(revealed)
"hazardous" failure
(unrevealed)
"safe" failure
(revealed)
"safe" failure
(unrevealed)
Diagnostic coverage
Safe failure fraction
Probability of failure
on demand
AZ20 oxygen analyzer
AZ30 oxygen analyzer
IEC61508
0
B
High demand Low demand
SIL 1
0.28 10 -2 per annum 3.11 10
2.72 10 per annum 3.22 10
-2
0 0.54 10
0
>91 %
5
SIL 2
-6 per hour
per hour
-7
per hour
-6
0
90.6 %
>91 %
1.6 10
-3