GeoDesy GD-3000 Series - Manual (Page 18)

18
6.3 Set the beam size
You can set the beam sizes of each transmitter separately. So do not switc on more
than one transmitter in the same time!
You can set the beam size turning the
focusing tube. First you have to loose the
shipping screws which are functioning as
transmitter fasteners, during shipment. Then
you have to loose the locking ring which
fastens the focusing tube. After that you can
manipulate with the beam size turning the
tube. If you turn it in clockwise direction the
diameter of the beam will increase, and in counter-clockwise direction the beam size
will decrease.
After you set the beam size, do not forget to lock the locking ring and tight up the two
shipping screws, but be careful that the transmitter does not move out its position!
The provide the excellent operation you need the following beam sizes:
On 3000m distances the diameter of the beam should be 3meters!
On 3250m distances the diameter of the beam should be 3,25 meters!
On 3500m distances the diameter of the beam should be 3,50 meters!
On 3750m distances the diameter of the beam should be 3,75 meters!
On 4000m distances the diameter of the beam should be 4 meters!
You can measure your beam size using a digital camera with infraed lenses. With
this you can see the beam behind the head on a surface (for example on a wall) and
there you can measure it. In that case if there are not any surfaces for beam
measuring, you can do it in the following method:
Face the remote side and check the beam with your camera. Move slowly to the
right in straight line until the picture of the beam, what you see in the camera, is
reducing, and sign that place. Do the same on the left side. Then you can measure
the distance between the twosigned places. That will be the diameter of the beam. If
you can not use the camera efficiently enough, you can do it with your own eyes too.
The method is the same with one difference, the border of the beam is where. You
cannot see the red dot on the transmitter lens of remote side.
Repeat the setting on both sides with all of the transmitters!
End of the alignment

Switch on all of the transmitters!(in MGM)

Reboot the laser head.

Close up the covers of the heads!