Preparation For Surveying; Centring And Levelling Of The Instrument; Laser Plummet - Pentax R-2500DN Series Instruction Manual

3. PREPARATION FOR SURVEYING

3.1 Centring and levelling of the Instrument

[Setting up the instrument and the tripod]
① Adjust the tripod legs so that a height suitable for observation is obtained when the
instrument is set on the tripod.
② Hang the plumb bob on the hook of the tripod, and coarse centre over the station on the
ground. At this time, set the tripod and fix the metal shoes firmly into the ground so that
the tripod head is as levelled as possible.
③ If the tripod head is mis-levelled by the action of fixing the metal shoes into the ground,
correct the level by extending or retracting each leg of the tripod.
Tripod head
Center screw

3.2 Laser plummet

[Laser plummet model]
The laser plummet is equipped with the R-2500DN series. Pressing [F4] [PLUM. ADJ] on
"RED MARK & LD PLUM Setting" screen will turn on the laser plummet function..
Match the position with the leveling screw so that the laser mark coincides with the
ground mark. The laser plummet is not set to be ON at factory shipping. The laser plummet
operation of power supply ON can be set by command No.520, LD PLUM. For using
Command number, refer to "9.2 Accessing by 007".
[Brightness adjustment of laser]
Sometimes the state of the surface of the ground mark or a surrounding environmental
does not allow observing the laser spot easily. Please adjust the brightness of the laser if
necessary.
If the laser plummet is turned on with the above
mentioned procedure,
screen of the laser plummet device, is displayed.
30
Instrument
Base plate
the brightness adjustment
Contract
Metal shoe