Control Box
P/N 7010-0341 www.topconpositioning.com
4-5
Grade Adjustment Direction Arrows
The grade adjustment arrows are located at the upper left and
upper right of the grade adjustment knob.
These two arrows (Figure 4-6) light up in red to indicate the
direction to turn the knob to reach on-grade.
Figure 4-6. Grade Adjustment Direction Arrows
Grade Adjustment LEDs
The grade adjustment LEDs (Figure 4-7) indicate raise, on-
grade, and lower information and corrections.
Figure 4-7. Grade Adjustment LEDs
Table 4-1 describes grade adjustment LED indications.
Table 4-1. LED Indications for Elevation/Slope Control
LED Display
LED
Elevation
Description
Slope Description
Slowly blinking,
yellow down
arrow
Out of range;
beyond .2’ above
grade
Beyond 2% above
grade
Solid yellow
down arrow
Above grade;
between .05' and .2'
Above grade,
between 1% and 2%
Blinking yellow
down arrow
Above grade;
between .02
' and
.05'
Above grade,
between .5% and
1%
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