Topcon ATP1 360 Use and care manual

NOTE: Prism Constant/Offset refers to a value that compensates for the extra distance the
laser beam travels through the prism in order to reach the plumb line once it initially hits
the glass. It changes with differing construction and therefore changes with each prism
type. Using the wrong Prism Constant will lead to Systematic Errors in a survey.
NOTE: Vertical Height is always measured from the base of the pole to the centre line of
the prism. If unsure of the value, always take a manual measurement using a hand tape.
Before working on site it is important that all equipment has been set-up correctly and
you are aware of the sources of error that can be introduced at this time.
Correct Prism and Instrument settings
(1)
Ensure the ATP1 prism is clean and none of the
faces are damaged.
NOTE: The constant for the ATP1 prism is -7.0 mm
ATP1 360 prism
(2)
Make sure that you use a carbon robotic pole with 1.42 m
marking and that the black 26 mm spacer is always
attached.
(3)
Ensure the correct prism constant has been set in
MAGNET Field.
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(1)
Press the icon and then Next to enter the second page of the menu.
Setting the correct Prism Constant for ATP1 360
Prism settings can be changed by pressing the ‘gears’
icon at the top-right when in the backsight, resection,
survey or stake screens .
(2)
Under ‘Survey Settings’ select ATP1 360 from the ‘Foresight P.C’ dropdown list.
Press the ellipsis button to ensure the Constant is correct as below.
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(1)
To add a new Prism Constant, enter the second page of the ‘Survey Settings’
menu and press the Ellipsis button next to the ‘Foresight P.C.’ box.
Adding a New Prism Constant
(2)
Under the ‘Prisms’ screen, select ‘Add’.
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(3)
Enter a Name, and the correct Constant and Aperature for the new prism type.
Make sure that the ‘Hybrid Positioning antenna offset’ is NOT ticked.
Press the green tick to save the new prism to the list.
(4)
If a new prism type is required, select it by pressing the prism icon and Edit.
Ensure the green tick is beside the required prism (as in step 2 above).
The constant will then be displayed.
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Changing Instrument Measurement Modes and settings
The EDM button located at the top-right of the survey or stake screens allows you to
change the instrument measurement mode at any point.
(1)
Select between required target Modes here.
Switching will also change the icon visible at
the bottom- left of the screen:
Selecting the ‘Laser Pointer On’ function emits a red laser that can be used to
identify or sight targets if required. To turn the laser off, select ‘Off’.
If undertaking reflectorless work, select ‘Non-Prism’.
The icon will change to a laser beam and wall.
When using the ATP1,
ensure ‘Prism’ is selected.
This will also display the
selected prism constant.
If measuring to retro-reflective targets select ‘Sheet’. The
icon will resemble a laser beam and retro target.
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(2)
There are two ways to record data in MAGNET Field:
Precise and Quick.
(3)
These buttons can be customised depending on the required application.
Press either one of the top two options from the EDM menu.
The Precise button will
measure and then
prompt you to either
Save or Discard the data.
The Quick button will
automatically save the
current position data
immediately.
The following settings menu will appear:
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(4)
Instrument measurement speed/update rate for both methods can be
changed via the EDM Mode dropdown menus.
NOTE: selecting ‘Tracking’ when using a prism is acceptable, but for the
most accurate, repeatable non-prism measurements to diffuse
surfaces such as concrete or brick, select ‘Fine’.
(5)
You can also command the instrument to take a number of measurements and store
these as a single average by entering values in the ‘Average’ boxes.
Different values can be set under either the Quick or Precise buttons if required.
(6)
Precise mode has an option to ‘Measure Continuously’ when using non-prism only.
This can be useful when checking if a particular element is plumb for example- this
removes the need to keep pressing the measure button.
To enable this, tick the box and ONLY press the left Precise button once when
required, remembering to select the red cross to discard OR floppy disk to store
when finished.
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