TECNOMOTOR 820 - Page 70

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Open the back of the instrument.
Remove and clean the filter holder.
The shape of the pipes makes the operator’s
cleaning task easier.
Cleaning the protective glass of the optical part:
right pipe.
Cleaning the mirror: left pipe.
Insert the filter holder.
Close the back of the instrument.
Perform an automatic zeroing, if the automatic
zeroing outcome is not positive repeat the
cleaning operation again.