David White 3900HV Owner's Manual page 6

Work area safety
Keep work area clean and well
lit. Cluttered or dark areas invite
accidents.
DO NOT operate the laser tool around
children or allow children to operate
the laser tool. Serious eye injury
could result.
DO NOT use instruments, attachments
and accessories outdoors when
lightening conditions are present.
Electrical safety
Batteries can explode or leak, cause
injury or fire. To reduce this risk,
always follow all instructions and
warnings on the battery label and
package.
Remove the batteries from the tool
when not using it for extended
periods. When storing for extended
periods, the batteries can corrode
and discharge themselves.
DO NOT short any battery terminals.
DO NOT charge alkaline batteries.
DO NOT mix old and new batteries.
Replace all old batteries at the same
time with new batteries of the same
brand and type.
DO NOT mix battery chemistries.
Dispose of or recycle batteries per
local code.
DO NOT dispose of batteries in fire.
Keep batteries out of reach of
children.
Personal safety
Stay alert, watch what you are
doing and use common sense
when operating a tool. Do not use
a tool while you are tired or under
the influence of drugs, alcohol or
medication. A moment of inattention
while operating a tool may result in
serious personal injury or incorrect
measurement results.
Use safety equipment. Always wear
eye protection. Safety equipment
such as dust mask, non-skid
safety shoes, hard hat, or hearing
protection used for appropriate
conditions will reduce personal
injuries.
DO NOT use the laser viewing glasses
as safety goggles. The laser viewing
glasses are used for improved
visualization of the laser beam, but
they do not protect against laser
radiation.
DO NOT use the laser viewing glasses
as sun glasses or in traffic. The
laser viewing glasses do not afford
complete UV protection and reduce
color perception.
DO NOT use any optical tools such
as, but not limited to, telescopes
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