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3.
Do one of the following:
To return to the measurement screen for the first set of F1 measurements,
–
press
[ESC]
To go to the next set of observations for a more accurate result, press the
–
softkey. You can record up to ten sets.
Cont
To store the parameter and return to the BMS, press
–
softkey.
4.
If HA corr. is set to OFF when you finish
updating the trunnion axis parameter, a message
appears. The message asks if you want to change
the setting. To change the setting, press the
softkey.
Trunnion axis compensation
The trunnion axis error is reported when the vertical axis and the trunnion axis
(horizontal axis) are not perpendicular to each other. The sighting axis error is from
the sighting and the trunnion axes. These two errors can be compensated by applying
the Tr-axis and ACH parameters on this instrument to horizontal angle readings.
Because the amount of compensation changes according to the vertical angle, when
compensation is enabled there is a slight movement in horizontal angle even if you
clamp the tangent screw.
or the
softkey.
Redo
Tr-axis
Checking and Adjustment
or the
[ENT]
Yes
ACH
Field Station NPL-632 Instruction Manual
6
END
1 51
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