7
2. PRECAUTIONS
• The lens cap and lens hood may become difficult to attach in low temperatures.
Keep them in a warm place such as a pocket until attached.
• If the unit is carried between locations that have extreme temperature
differences, protect the unit from rapid temperature change by placing it in the
carrying case.
• Please use the tribrach supplied as standard. If a different tribrach is used,
angle measurement errors may occur.
Other precautions
• Close the external interface hatch before starting measurement. Otherwise,
ambient light entering the USB port may adversely affect measurement results.
• 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.
"36.2 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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