Figure 2-2: User Interface of the Hydran M2-X
Note: Although the Hydran M2-X’s user interface can be used to perform all
required tasks (some of the set-up functions can be performed only from the user
interface), it is recommended to connect (using an RS-232 link) the Hydran M2-X to a
laptop computer running the Perception software. This software provides an easier
and friendlier environment to perform the same tasks.
2.1.1 Gas Detection
The Hydran M2-X’s sensor is equipped with a gas detector that is sensitive to the
four gases that are the primary indicators of incipient faults in oil-filled electrical
equipment:
• Hydrogen (H
2
)
• Carbon monoxide (CO)
• Ethylene (C
2
H
4
)
• Acetylene (C
2
H
2
)
Note: The gas detector measures a composite value of the above dissolved gases
in oil.
For information on how to compare the Hydran M2-X’s gas level reading with a
DGA, see Section 9.4.2.
2.1.2 Moisture Detection
The Hydran M2-X’s sensor is equipped with a thin-film capacitive sensor that
measures the moisture in oil. Water exists in oil in four forms:
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