Topcon RC-4, Инструкция по эксплуатации

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Basic Operation
17
Light Detecting Range
The detecting angles of RC-4R and RC-4H (TS/IS/QS) are shown below:
TS/IS/QS can only be turned round with the turn-round key under the condition that RC-4R remains confined
within the range as shown below where RC-4H can detect light.
Important
Maintain the angle toward the TS/IS/QS within the range shown above until
the turn-round function is completed.
Turn-round function can be done within above range.
Top view
Side view
Detecting range
Detecting range
(RC-4H can detect the laser in all horizontal direction.)
RC-4H