22
Checking and Adjusting Calibration
There are three areas of performance the user should check periodically.
Horizontal Calibration
Horizontal Rotation Cone
Grade Setting Error
The Horizontal Calibration can be easily checked and, in most cases, adjustments can be
made by the user. Horizontal Rotation Cone and Grade Setting Error can be checked by the
user. However, if an error is found, adjustments must be made by a Topcon service facility.
Horizontal Calibration
(1) Checking Calibration
1
Set up a tripod 50m (160ft) from a wall. Mount the instrument on the tripod, facing the X1
side toward the wall.
Ｘ
ｒｐｍ
１００
ＭＡＮＵ
×
ＰＯＷＥＲ
％
ＯＮ
ＥＮＴ
Instrument as seen from above
Handle
Panel side
50m (160feet)
Wall
1st
On-Grade
Position
Level
Sensor
Laser Beam
at X1
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