Emerson Rosemount 3812, Maintenance And Troubleshooting Manual

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Table 2-2: Maintenance
(continued)
MeterLink utility Diagnostics Action(s)
MeterLink Meter Monitor
(Summary) view Chord Failure • The meter is unable to obtain measurement
data from a pair of transducers.
• The cause may be isolated to one pair of
transducers or its cabling. Check the
transducer wiring for this pair of
transducers to make sure connections are
secure and wired correctly.
• Verify that the meter run is not partially full
where this top transducer pair is not
submerged in the process fluid.
• Verify the average gain of this transducer
pair is not above 90dB. Read the value from
the MeterLink Monitor Page or using AMS
under
Service Tools
→
Path
performance.
• Remove the transducer and clean the
transducer face. Reapply coupling fluid to
the transducer face and reinstall (see
Transducers replacement ).
Security seals • Endcap seals
• Endcaps latches
• Transmitter Electronics
Enclosure
• Base Enclosure
• Shroud seals
Only authorized personnel may remove
security seals. Follow your standard operating
procedure to report seals that have been
tampered with or removed and replace the
seals per instructions in
Section 3.6.8 in the
Installation Manual (00825-0100-3812).
External ground wiring Transmitter Electronics
Enclosure ground lug Inspect ground lug wiring and make sure the
wiring is tightly secured.
Conduit seals Transmitter Electronics
Enclosure • Inspect the conduit sealant and follow your
standard operating procedure to report
tampering with the conduit sealant.
• Your operating procedures may require a
certified electrician and company witness to
reseal the conduit.
Flanges Inspect for leaks Perform leak tests on flanges
2.2.2 Unable to connect direct serial or external serial modem
If you are using Windows ® XP, Windows ® Vista or Windows ® 7 make sure that you do not
have more than one modem driver installed to the same COM port. Typically this will only
be necessary if you use one COM port to talk direct (serial communications) and use the
same COM port to connect to an external modem. This is an apparent limitation in
Microsoft’s
® Dial-up Networking. If more than one modem driver is installed for a
particular COM port, Dial-up Networking will always use the last driver installed regardless
of what is selected. The only work around is to only install one modem driver per COM port
Troubleshooting Maintenance and Troubleshooting Manual
April 2022 00809-0100-3812
30 Emerson.com/Rosemount