Instruction Manual
IM-106-910C, Rev. 1.0
November 2009
5-3
Hazardous Area
X-STREAM O
2
Transmitter
Electrical Noise
The Hazardous Area X-STREAM O
2
Transmitter has been designed to
operate in the type of environment normally found in a boiler room or control
room. Noise suppression circuits are employed on all field terminations and
main inputs. When fault finding, evaluate the electrical noise being generated
in the immediate circuitry of a faulty system. Ensure all cable shields are
connected to earth.
Electrostatic Discharge
Electrostatic discharge can damage the ICs used in the electronics. Before
removing or handling the circuit boards, ensure you are at ground potential.
ALARM INDICATIONS
The first indication of a problem at the Hazardous Area X-STREAM O
2
Trans-
mitter usually comes from the operators running the process. Critical alarms
that render the O
2
measurement unusable will force the 4-20 mA analog out-
put signal representing O
2
to go to a default condition, as follows:
NOTE
Make sure that the Control System is configured to interpret these signal
levels correctly!
Once an alarm condition is identified, the Hazardous Area X-STREAM O
2
Transmitter electronics offers a number of diagnostics to interpret the specific
alarm.
Alarm indications are available via the Xi Enhanced Interface or the 375 Field
Communicator and Rosemount Analytical's Asset Management software.
When the error is corrected and/or power is cycled, the diagnostic alarms will
clear or the next error on the priority list will appear.
4-20 mA Signal
Alarm Level
Transmitter Condition
0 mA
Transmitter unpowered, or completely failed
3.5 mA
Critical Alarm - transmitter reading unusable (factory default)
3.8 mA
Reading Under Range
(Example - user sets range to 2-10%. Current reading is 1.9%)
4 to 20 mA
Normal Operation
20.5 mA
Reading Over Range (Example - range is 0-10%. Current reading is 12%)
>21 mA
Critical Alarm - transmitter reading is unusable (user can choose this alarm
level instead of the factory default level of 3.5 to 3.6 mA)
