Low battery
Blinking: Normal volume
Solid: Loud
No horn: Mute
Standard
Default
mode
(
)
Fine
Low
Near
grade low
On-grade
Near
grade high
High
B
ATTERY STATUS
S
OUND
A
CCURACY
• Using the detector
1.
Press the On/Off key to turn on the detector.
2.
Press the middle key to select the accuracy (deadband).
3.
Press the top key to select the sound level.
4.
Turn the detection window towards the laser beam, and
move the detector up or down according to the information
given on the LCD display. There are 5 channels of information,
or grade indicators.
A down arrow indicates you must move the detector down to
reach the laser reference; an up arrow, move it up. When a
horizontal line appears on the display, the detector is at the
same level as the laser beam.
5.
Press the On/Off key to turn the detector off. It will
automatically shut off after 10 minutes if not used (and give a
warning beep).
6.
Keep the detection window clean, using a soft cloth and
glass cleaner.
• LCD Display
6.1 Detector for grade rods or
handheld applications
Choice of
sound level
LCD
screen
(front)
LCD screen
(rear)
Bubble vial
to plumb
rod
9V battery
compartment
(follow polarity
indications
inside)
On-grade
alignment notch
Rod clamp
Detection
window
Level vial
Choice of
accuracy
Turn to attach
clamp to detector
On/Off
Turn to tighten
or remove clamp
from rod
Keypad
15
14
GB F E D I N FIN
GAT220-08-2007 12/01/08 19:12 Page 14
Summary of Contents for GAT220
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