YOKOGAWA ADMAG AXR - A1.2.6 Repair and Replacement

<Appendix1. Safety Instrumented Systems Installation>
A1-2
IM 01E30D01-01EN
Table A1.2.2 Proof Testing
Thesuggestedprooftestwilldetect78%ofdangeroushiddenfailuresintheAXR.
Step Action
1. Bypass the safety function and take appropriate action to avoid a false trip.
2. Use HART communications to retrieve any diagnostics and take appropriate action.
3. SendaHARTcommandtotheowmetertogotothehighalarmcurrentoutputandverifythattheanalog
current reaches that value.
4. SendaHARTcommandtotheowmetertogotothelowalarmcurrentoutputandverifythattheanalog
current reaches that value.
5. Performatwo-pointcalibrationoftheowmeteroverthefullworkingrange.
6. Checkcurrentoutputwhenthereisnoowinthemeter.
7. Checkcurrentoutputwhenthereisatypicalowinthemeter.
8. Remove the bypass and otherwise restore normal operation.
For details, refer to the FMEDA No. YOK 10/06-091 R001 V2R3.
The manuals can be downloaded from the website of Yokogawa or purchased from the Yokogawa
representatives.
Websiteaddress:http://www.yokogawa.com/d/
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sufcient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rmware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rmwareupdates.