5
Slower-blinking LEDs are an out-of-beam indication (receiver has moved
beyond the reception range). The LED arrows show the direction to move
the bucket to pick up the laser beam again.
To turn off the receiver, hold the On/Off key for 3 seconds and release.
If the MR240 does not receive any signal for an hour, it will shut off auto-
matically.
The receiver uses 3 AA alkaline bat-
teries. Unscrew black cap at bottom
of unit to replace batteries; orient as
shown. Operating time is approxi-
mately 130 hours.
The low battery LED near base of
receiver will be lit when there are
about 8 hours remaining.
4. Power
LEDs indicate grade direction:
the blinking LEDs point in the
direction to move the bucket to reach grade.
3 - CHANNEL MODE
5 - CHANNEL MODE
4
3. Using the MR 240
Coarse
3 channels
Fine
3 channels
Fine
5 channels
Back to Coarse
3 channels
Press red On/Off key at the top of receiver to turn it on.
Changing deadband settings
(fine and coarse)
LEDs blink momentarily to indicate the setting: deadband (fine or
coarse accuracy) and channels. The last setting used stores in
memory and is the default when turned on.
Pressing On/Off will change the setting, in this sequence:
LED indicators
On/Off switch;
also changes
deadband setting
Back plate with
strong magnets;
attaches to machine
On-grade
alignment notch
Magnet release lever
3 AA batteries
Above grade
On-grade
Below grade
Low battery
High or
Beam
Lost
On
Grade
Low or
Beam
Lost
High or
Beam
Lost
Near
grade
high
On
Grade
Near
grade
low
Low or
Beam
Lost
MR240 14/08/07 12:59 Page 4
