7
7. Specifications
Range
650 ft. (200 m)
varies with laser used
Accuracy
Fine
1/4” (6 mm) typical
Coarse
1” (30mm) typical
Actual accuracy depends on beam diameter and distance to the laser.
Laser capture height
6” (15 cm)
Reception angle
230°
Power
(3) AA alkaline batteries
Battery life
Approx. 130 hours; depends
on use and temperature
Automatic shut-off
After 1 hour of no activity
Operating temperature
-18°F to 158°F (-28°C to 70°C)
Type of attachment
Magnetic (rare earth magnets
built into back plate)
Environmental
Waterproof; IP67
Size
8.5” x 5” x 4” (22 x 10 x 12cm)
4.8 lbs. (2.2kg) without batteries
6
With the dipper arm relatively plumb, measure up from the bucket.
The bucket can be fully extended or curled, as long as it’s used in the
same position when grade readings are taken. Position the receiver’s
on-grade notch at the top of this (L) measurement (per the following
attachment instructions).
5. Setup for excavating
6. Positioning the MR 240
Before placing the receiver on the exca-
vator arm, pull down on the release lever.
This creates a gap between the back
plate and machine, preventing the
strong magnets from attaching to the
machine until you have it in position.
Positioning tip:
Place it slightly above
your mark, and work the lever up and
down slightly to walk the receiver down
into the on-grade position.
Use the release lever to remove the
receiver from the machine.
Aligne Laser
to Notch
Bucket
Extended
Excavation
Depth
Benchmark
Place the laser in a loca-
tion where receiver can
pick up the beam, and
turn it on.
To determine the setup
length:
measure the H.I. (height
of instrument).
Add that to Cut
measurement to
determine depth (L).
MR240 14/08/07 12:59 Page 6
