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1.5 Fitting the external lter plate
The external lter plate is an optional accessory incorporating lters that allow gas to pass through
but protect the sensors from dirt and debris. The lter plate will protect the sensors making it easier to
maintain T4.
Place the lter plate into the groove on the left hand side of the T4 rst
À, ensuring the at part of the
plate faces the bottom of the T4, then click the right hand side in place Á.
Figure 6: Fitting the external lter plate
The lter plate is suitable for use in a hazardous area.
The lter plate has been designed to operate with the charging accessories and does not need to be
removed when inserting T4 in to the desktop charger, the ten-way charger or the T4 vehicle charger.
i
The lter plate should be replaced if the lters are damaged by substances that could
affect the ow of gas to the sensors, like paints, grease or oils.
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