PN 9000-280-VE, Rev B
AMEVision Communication Troubleshooting Checks
No Communications
Possible Cause
Corrective Action
Polarity reversed
Check the wiring for proper polarity. Review associated wiring
diagrams. Correct the wiring.
Address not set correctly
From the AMEVision Display, check the Address setting.
On the
User Interface
board, check the dip switch settings.
Refer to “Setting the Analyzer Address Using the Dip Switch
(to Enable Communications Between the Analyzer and the
AMEVision Display User Interface Unit)” in this section for more
information.
Maximum distance be-
tween devices exceeded
If the distance between the AMEVision Display Unit and the
analyzer (furthest analyzer in a daisy-chain configuration) ex-
ceeds 1219.2 meters (4000 ft), the devices must be moved closer
together.
Broken connection
Check cables and wiring for damaged or broken connections.
Replace or fix the connections as needed.
Intermittent Communications
Possible Cause
Corrective Action
Poor wiring (i.e., lack of
shielded twisted pair)
Check the wiring to ensure it meets proper specifications for this
installation. Replace the wiring if necessary.
Termination enabled on
more than one unit (on
multi-unit systems)
Check the communication termination resistors (dip switch
SW-5
) on each analyzer in the daisy-chain. This switch is located
on the front of the
Sensor
board. Only the dip switch on the last
analyzer (farthest from the AMEVision Display Unit should be
Enabled. Ensure all others are Disabled.
Termination not enabled
(on multi-unit systems)
Maximum distance be-
tween devices exceeded
If the distance between the AMEVision Display Unit and the
analyzer (furthest analyzer in a daisy-chain configuration) is close
to exceeding, or does exceed, the maximum required distance
(1219.2 meters/4000 ft), the devices may need to be moved
closer together.
2-36 | Thermox
®
WDG-V UOP ATEX-IECEx Analyzer
