David White AutoLaser 3100 Série Manuel D'instructions page 14

Grade Mode – Dual or Single Axis Grade (Model 3175)
The dual grade function allows more specialized site preparations such as road grading, airport
jobs (grading & paving), irrigation, trenching, landfills, slopes and
embankments, and pipelaying. (Fig.11)
The Dual Grade Mode screen is the default screen when the instrument
is turned on. Use the MODE button to choose either the X axis or Y axis.
An > on the display will indicate the selected axis. Press the left SELECT
button to increase slope, press the right SELECT button to decrease slope. Ideally for single axis
grade, use the Y axis in order to use the top mounted sight to orient the instrument to your target,
as well as locate the high and low positionswithin the arc. While grade on both axes is set to zero,
the instrument will continue to self-level. Percentage of grade can be selected at any time while in
this mode. However, the instrument will not go to the desired grade until the instrument has
leveled.
Allow the instrument ample time to react to the input provided. Refer to examples in (Fig. 12) to
predict your results.
To exit Grade Mode, press and hold the MODE button for 4 to 5 seconds. When the button is
released, the MODE select menu is available. (it is not necessary to press and hold the MODE
button to exit any other mode).
NOTE: The total percent grade possible is from a perfectly level base position. If the instrument is
mounted on a tripod head which is not perfectly level, then the grade percentage range capability
would be reduced by the slope of the base, as this affects the tilt range of the laser head. For
maximum grade range, ensure a level tripod head using a spirit level before mounting
your instrument.
FOR ALL GRADE LASERS: For greater accuracy in grade applications, precisely level the laser
level before entering into GRADE MODE.
FOR 3175: If the instrument can't achieve desired grade it will give an error message "GRADE TOO STEEP"
Anti-Drift in Grade Mode (Models 3175)
The Auto Level Mode can be set to ADS while instrument is in
Grade Mode. ADS will protect against accidental bumps or
settling of the instrument that could cause errors. If the
instrument has been setup to default to Auto Level ADS at startup,
the Grade Mode ADS is already on. If the instrument has not been
set up to default to Auto Level ADS at startup, enter the Auto
Level Mode and selecting ADS. Return to Grade Mode after
selecting ADS. ADS will only be active as long as one axis is set
to zero percent grade (Single Axis Grade). ADS will not be active
while in Dual Axis Grade. ADS is automatically disabled for 30
seconds whenever a new set point is entered for the grade axis.
In Grade Mode, when the instrument is moved out of grade level,
the laser head will stop rotation and the beam will blink to indicate to
the operator that the HI of the instrument may have changed. To
continue, the operator must acknowledge by pressing the right
SELECT button to select the "CONTinue" option.
14 • 3100 SERIES
+ >X 0.00% –
>Y 0.00%
SELECT
AUTOLEVEL
ON
AUTOLEVEL
OFF
AUTOLEVEL
ADS
AUTOLEVEL
UNIT UNLEVEL
–
LEVEL
LEVEL
LEVEL
CONT