Yokogawa ADMAG AXR - Manual (Page 187)

<Appendix1. Safety Instrumented Systems Installation>
A1-2
IM 01E30D01-01EN
Table A1.2 Proof Testing
Testing method Tools required Expected outcome Remarks
Analog Output Loop Test and Calibration
1. Bypass the safety PLC or the final
element interface or take other
appropriate action to avoid a false trip.
●Analog Output Loop Test:
2. Send a HART or BRAIN command to
the Magnetic Flowmeter to go to the
high alarm current output and verify that
the analog current reaches that value
and verify that discrete contact has de-
energized (if used)
3. Send a HART or BRAIN command to
the Magnetic Flowmeter to go to the low
alarm current output and verify that the
analog current reaches that value.
4. Use the HART or BRAIN communicator
to view detailed device status to ensure
no alarms or warnings are present in the
Magnetic Flowmeter.
5. Perform reasonability check on the
sensor value(s) versus an independent
estimate (i.e. from direct monitoring of
BPCS value) to show current reading is
good.
●Calibration
6. Verify the measurement for two flow
points.
7. Restore the loop to full operation.
8. Remove the bypass from the safety PLC
or otherwise restore normal operation.
• BT200
• HART configuration
tool
Proof Test Coverage
=96%
The output needs to be
monitored to assure that
the Magnetic Flowmeter
communicates the correct
signal.
A1.2.6 Repair and Replacement
If repair is to be performed with the process online
the AXR will need to be bypassed during the
repair. The user should setup appropriate bypass
procedures.
In the unlikely event that the AXR has a failure, the
failures that are detected should be reported to
Yokogawa.
When replacing the AXR, the procedure in the
installation manual should be followed.
The personnel performing the repair or replacement
of the AXR should have a sufficient skill level.
A1.2.7 Startup Time
The AXR generates a valid signal within 10 second
of power-on startup.
A1.2.8 Firmware Update
In case firmware updates are required, they
will be performed at factory. The replacement
responsibilities are then in place. The user will not
be required to perform any firmware updates.
A1.2.9 Reliability Data
A detailed Failure Mode, Effects, and Diagnostics
Analysis (FMEDA) report is available from
Yokogawa with all failure rates and failure modes.
The AXR is certified up to SIL2 for use in a simplex
(1oo1) configuration, depending on the PFDavg
respectively PFH calculation of the entire Safety
Instrumented Function.
The development process of the AXR is certified up
to SIL3, allowing redundant use of the transmitter
up to this Safety Integrity Level, depending the
PFDavg respectively PFH calculation of the entire
Safety Instrumented Function.
When using the transmitter in a redundant
configuration, the use of a common cause factor
(β-factor) of 5% is suggested. If the owner-operator
of the plant would institute common cause failure
training and more detailed maintenance procedures
for avoiding common cause failure, a beta factor of
2% would be applicable.