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20. OFFSET MEASUREMENT
• It is possible to make this measurement easily using the optional equipment: the 2-point target (2RT500-K).
When using this 2-point target, be sure to set prism constant to 0.
"7.2 Levelling"
How to use 2-point target (2RT500-K)
• Install the 2-point target with its tip at the target point.
• Face the targets toward the instrument.
• Measure the distance from the target point to the 2nd target.
• Set the reflector type to “sheet”.
PROCEDURE
1. Install two offset points (1st target, 2nd target) on a straight
line from the target point and use the offset points as the
target.
2. Press [OFFSET] in page three of OBS mode to display
<Offset>.
3. Enter the instrument station data.
"13.1 Entering Instrument Station Data and Azimuth
Angle"
4. Select “Offset/2D” in <Offset>.
• The tilt screen is displayed if the instrument is out of level.
Level the instrument.
"7.2 Levelling"
5. Sight the 1st target and press [MEAS].
Observation begins and the measurement results are
displayed.
Press [YES]. The “2nd Target Observation Screen” is
displayed.
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