30
MAINTENANCE
1. Disconnect the power from the power supply
terminals and relay output terminals.
2. Remove the instrument from its case.
3. Using a vacuum cleaner or a compressed air jet (max.
3 kg/cm
2
) remove dust and dirt which may be present
on the louvers and on the internal circuits, being
careful to not damage the electronic components.
4. Clean external plastic or rubber parts with a cloth
moistened with ethyl alcohol (pure or denatured)
[C
2
H
5
OH]; or isopropyl alcohol (pure or denatured)
[(CH
3
)
2
CHOH]; or water [H
2
O].
5. Verify that there are no loose terminals.
6. Before re-inserting the instrument in its case, be sure
it is dry.
7. Re-insert the instrument and turn it on.
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