Technical Inspection
It is recommended to carry out a technical inspection before each use of the device. Check
the following:
The state of the objective and eyepiece lenses (there should be no cracks, grease spots,
dust, deposits).
The device appearance (there should be no cracks on the housing).
The state of the rechargeable battery (should be charged) and the electric contacts
(should be no signs of salts, oxidation or debris).
The controls should be in working order.