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35
MAINTENANCE
1. Remove power from the power supply terminals and
from relay output terminals.
2. Remove the instrument from case.
3. Using a vacuum cleaner or a compressed air jet (max.
3kg/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 only 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 perfectly dry.
7. Re-insert the instrument and turn it ON.
7sl-z-00.p65 9/17/02, 2:46 PM35