4
1. Precautions for Safety
1.1 NOTE
Don’t collimate the sun directly
Avoid to insolate the instrument, and don’t collimate the sun directly for protecting
eyes and instrument.
Avoiding the librations on the instrument
When transporting, keep the instrument in the case and try your best to lighten
librations.
Carry the instrument
When carrying，the instrument handle must be hold tight.
Check the battery power
Before using it, you should check the power whether it is enough.
Take out the battery
It is not suggested to take out the battery when the instrument is on, otherwise, the
stored data may be lost, so it is better to replace the battery after power off the
instrument.
Set up the instrument on the tripod
When using it please insure the connection between tripod and instrument is firm. It
is better to work with wooden tripod for the measurement accuracy.
Assemble the tribrach on the instrument
The setting of tribrach would influence the accuracy. The tribrach should be check
frequently, the screw which connects the tribrach and alidade must be locked tightly.
And the central fixing screw should be tight.
High temperature condition
Don’t put the instrument in high temperature condition（50℃ up）for a long time, it
is bad for the instrument performance.
Temperature changing sharply
The sharp temperature changing on the instrument or prism will shorten the distance
measurement range, for example, after taking the instrument out from a warm car to
a cold condition, wait for some time, it can be used when it adapts the surrounding
condition.
The noise from the instrument
When the instrument working, it is normal if you hear the noise from instrument
motor, it will not affect the instrument work.
Stored data responsibility
GPI-120 should not be held liable for the lost data because of wrong operation.
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