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Tribrach
• Always use the tribrach provided. During a traverse observation, it is recommended to use the same type of
tribrach for the target as well for accurate observations.
Backing up data
• Data should be backed up (transfered to an external device etc.) on a regular basis to prevent data loss.
Other precautions
• Close the external interface hatch and battery cover before starting measurement. Otherwise, ambient light
entering the USB port may adversely affect measurement results.
• If the GM 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 GM to a cold place.
• Never place the GM 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.
• Do not perform vertical rotation of the telescope when using the lens hood, diagonal eyepiece, or solar filter.
Such accessories may strike the instrument causing damage.
• Protect the GM from heavy shocks or vibration.
• Never carry the GM on the tripod to another site.
• Turn the power off before removing the battery.
• When placing the GM 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.
