Instruction manual

5
2. PRECAUTIONS
Vertical and horizontal clamps
• Always fully release the vertical/horizontal clamps when rotating the instrument or telescope.
Rotationg with clamp(s) partially applied may adversely affect accuracy.
Backing up data
• Data should be backed up (transferred to an external device etc.) on a regular basis to prevent data
loss.
Use under low temperatures (Low Temperature Model only)
• Do not use force to scrape off frost from the lens or display unit screen. Frost is an abrasive material
and may scratch the instrument.
• If ice or snow attaches itself to the unit, wipe it off with a soft cloth, or place the unit in a warm room
until the ice melts, and then wipe off the meltwater. Operating the unit with ice or snow attached may
cause operation errors to occur.
• Wipe off condensation with a soft cloth before using the instrument. Not doing so may cause
operation errors to occur.
• The working duration of battery BDC70 will rapidly decline in cold temperatures. When using the
instrument in temperatures around -30°C, we recommend thatyou use external battery BT-73Q
(optional accessory) and dedicated cables EDC119. However, if you unavoidably must use battery
BDC70 for measurements in temperatures around -30°C, recharge the battery in a warm room and
keep the battery in a warm place such as your pocket until it is used. (Working duration of battery
will change with environmental conditions.)
• 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
• Never place the instrument directly on the ground. Sand or dust may cause damage to the screw
holes or the centering screw on the base plate.
• Do not perform vertical rotation of the telescope when using the lens hood, diagonal eyepiece, or
solar filter. Such accessories may strike the OS causing damage.
• Protect the instrument from heavy shocks or vibration.
• Protect the instrument from rain or drizzle with an umbrella or waterproof cover.
• Never carry the instrument on the tripod to another site.
• Turn the power off before removing the battery.
• Remove the battery before placing the OS in its case.
• Make sure that the instrument and the protective lining of the carrying case are dry before closing the
case. The case is hermetically sealed and if moisture is trapped inside, the instrument could rust.
• 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.