2. PRECAUTIONS
6
The Lithium Battery
• The lithium battery is used to maintain the ES Calendar & Clock function. It can
back up data for approximately 5 years of normal use and storage (Temperature
= 20°, humidity = about 50%), but its lifetime may be shorter depending on
circumstances.
Vertical and horizontal clamps
• Always fully release the vertical/horizontal clamps when rotating the instrument
or telescope. Rotating with clamp(s) partially applied may adversely affect
accuracy.
Backing up data
• Data should be backed up (transfered to an external device etc.) on a regular
basis to prevent data loss.
Other precautions
• If the ES is moved from a warm place to an extremely cold place, internal parts
may contract and make the keys difficult to operate. This is caused by cold air
trapped inside the hermetically sealed casing. If the keys do not depress, open
the battery cover to resume normal functionality. To prevent the keys from
becoming stiff, remove the connector caps before moving the ES to a cold
place.
• Never place the ES directly on the ground. Sand or dust may cause damage to
the screw holes or the centering screw on the base plate.
• Do not aim the telescope directly at the sun. Also, attach the lens cap to the
telescope when not in use. Use the Solar filter to avoid causing internal damage
to the instrument when observing the sun.
"34.2 Optional accessories"
• Protect the ES from heavy shocks or vibration.
• Never carry the ES on the tripod to another site.
• Turn the power off before removing the battery.
• When placing the ES in its case, first remove its battery and place it in the case
in accordance with the layout plan.
• Consult your local dealer before using the instrument under special conditions
such as long periods of continuous use or high levels of humidity. In general,
special conditions are treated as being outside the scope of the product
warranty.
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