Laser Rangefinder Calibration
13, 2006 17:43 PST
When someone purchases a new laser rangefinder, they should
check on how
well it is calibrated. It is a fairly simple procedure to see
accurately the laser is measuring.
1) Make sure the laser works by putting in the battery and try
measuring a few distances around your home. Check to make sure
using the correct scale.
2) Next try to find some place where you can measure longer
Typical distance you will be measuring for trees will be 40 to
yards. It is better to check the calibration at the distance you
actually will be measuring with it. A local
football or baseball field
is a good place to go.
3) You will need a long tape, the longer the better. If it is 50
for example, you will need to stretch out several lengths of the
check the distances.
4) Lay the tape out on the ground or pick a target and carry
to mark your position. The target should be something relatively
from which you can get a good reflection and not be obscured by
other intervening objects.
5) As you move away from the target you want to measure the
the point the laser changes from one number to the next larger
Either read the tape at that point or mark the point and measure
later. When measuring the tree top or bottom you move back and
get to the exact point the number on the laser changes from one
other. Measuring at the point where the numbers
changes on the
instrument will be repeatable and accurate to probably less than
6) You should find it gives a good reading of distance when used
way. Often you will find the factory settings to be close enough
you may need not to use any calibration corrections for
the laser is off by a half a yard or a yard or more, you should
returning it to the factory for recalibration.
**** If you are measuring set distances on a tape with a laser,
you are doing it backwards. This will result in measurement
up to 3 feet.