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17-2
17 CHECK AND ADJUSTMENT
17.2 Checking the Optical Axis
17.2.1Checking the optical axis of EDM and theodolite
To check if the optical axis of EDM and theodolite are matched, follow the procedure below.
It is especially important to check after adjustment of the eyepiece reticle is carried out.
1) Position a prism about 30 to 50m apart from GPT-3100N series.
2)Turn the power ON while pressing the [F1] key.
Adjustment mode menu 1/2 will appear.
3)Press the [F4](P
) key to get the menu 2/2.
Press the [F1] key to select the EDM CHECK
mode.
4)Collimate the center of a prism by prism mode.
The buzzer will sound.
5)Press the [F4](hold) key to hold the quantity of
the light.
The mark "#" will appear on the right side of the
signal level indicator.
zH direction confirmation (Do not move V direction).
6) Turn the horizon tangent screw, move the collimating point to the left side of prism gradually until
buzzer sound stops.
Check each of the optical axis of EDM and theodolite about prism mode and non-prism mode in order.
ADJUSTMENT MODE 1/2
F1:V ANGLE 0 POINT
F2:INST. CONSTANT
F3:V0 AXIS P
ADJUSTMENT MODE 2/2
F1:EDM CHECK
P
V: 90° 10'10"
HR: 20° 00'20"
SIGNAL:[IIIII]
EXIT NP/P HOLD
V: 90° 10'10"
HR: 00° 04'20"
SIGNAL:[IIIII] #
EXIT NP/P HOLD
Reticle
Prism
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