Craftsman 320.48277 Owner's Manual

Owner's Manual

Compact Laser Measuring Too_

Model No. 320.48277

_k CAUTION! Read, understand and
follow all Safety Rules and Operating

Instructions in this Manual before
using this product.

o Warranty
° Safety instructions

o Unpacking

o Description
o Operation

o Maintenance

• Troubleshooting

Sears, Roebuck and Co., Hoffman Estates, IL 60179

www_craftsman.com

Warranty Page 2
Safety Instructions Page 3

Unpacking Page 3
Description Pages 4-8
Operation

Maintenance Page 20

Trouble Shooting Page 21

Service Numbers Back Cover

ONE YEAR FULL WARRANTY ON CRAFTSMAN® PRODUCT

If this Craftsman tool fails to give complete satisfaction within one
year from the date of purchase, return it to any Sears store or other

Craftsman outlet in the United States for' free replacement.

This warranty does not include expendable parts, such as blades and

lamps,.

This warranty applies for only 90 days from the date of purchase if this

product is ever used for commercial or rental purposes,,

This warranty gives you specific legal rights, and you may also have

other rights, which vary from state to state_
Sears, Roebuck and Co. Hoffman Estates, IL 60179

SAVE THESE INSTRUCTIONS!

READ ALL INSTRUCTIONS!

48277 ManuaLRevlsed_09-O211 Page 2

WARNING: BE SURE to read and understand all instructions in this

manual before using this product,, Failure to follow atl instructions may result in
hazardous radiation exposure, electric shock, and/or bodily injury.

,_ CAUTION: Do not attempt to modify the performance of the laser device in

any way., This may result in a dangerous exposure to laser radiation

WARNING: LASER RADIATION. Do not stare into beam, CfassII laser

product.. Turn the laser beam on only when using this tool
_Ik WARNING: Use of controls, adjustments, or the performance of procedures

other than those specified inthis manual may result in hazardous radiation exposure,
_k WARNING: The use of optical instruments such as, but not limited to,

telescopes or transits to view the laser beam wilt increase eye hazard.
This measuring toot has a built-in laser light. The laser is a ClassiI and emits

output power of a maximum 1roW and 635 wavelengths These lasers do not
normally present an optical hazard. However, do not stare at the beam, as this

can cause flash blindness,
The following label is on your laser measuring toot., It indicates the location

from which the laser measuring tool emits the laser light, Be aware of the laser
light location when using the tool, Always make sure that any bystanders in the
vicinity of use are made aware of the dangers of looking directly into the laser,

o Do not remove or deface any product labels.
o Avoid direct eye exposure. The laser beam can

cause flash blindness, AVOID EXPOSURE

Lar_er r_dt_tl_ Is oral{ted f_m _hls *_port_to

. The laser measuring toot is not a toy. Always __

keep it out of the reach of children. The laser _*_..ADIA_O..OO___"_".._"TgB_

light emitted from this device should never be .................................

_vr_

directed toward any person for any reason ................

Do not operate the tool around children or allow ...........

children to operate the tool,,
Do not place the tool in a position that may cause anyone to stare at the

laser beam, whether intentionally or unintentionally,

o Do not use on surfaces such as sheet steel that have shiny, reflective

surfaces The reflective surface could reflect the beam back at the operator,,
Always turn the laser tool off when not in use. Leaving the tool on

increases the risk of someone inadvertently staring into the laser beam,,

Do not attempt to modify the performance of this laser device in any way

This may result in a dangerous exposure to laser radiation.

48277 Manuat_Revised_O9-0211 Page 3

• Do not attempt to repair or disassemble the laser-measuring tool ff
unqualified persons attempt to repair this product, serious injury may occur,,
Any repair required on this laser product should be performed only by

authorized service personnel,

o 13o not operate the tool in combustible areas, such as in the presence of

flammable liquids, gases, or-dust.

• Use of other accessories that have been designed for use with other laser
tools could result in serious injury..

- Keep batteries out of reach of children.

- For further information regarding lasers, refer to ANSFZ136.1, the Standard
for the Safe Use of Lasers, available from the Laser Institute of America (407)

380-1553

When unpacking the box, do not discard any packing materials until all of the
contents are accounted for:

1. Carefully lift the laser measuring tool out of the carton and place on a stable,

fiat surface..

2. Open the parts bag to locate the following:
o Laser measuring tool

" Owner's manual

48277 ManuaLRevised 09-0211 Page 4

KNOW YOUR LASER MEASURING TOOL (Fig. 1)

Fig. 1

4 5

i

_6

_7

The laser measuring tool is a highly accurate measuring tool for fast,
easy operation:

o Measure distances from 1 foot to 100 feet with an accuracy of ±1/8 inch,,
a The laser measuring tool is intended for:

o Measuring distances, lengths, heights, and clearances
= Difficult-to-measure situations: the Pythagorean Theorem mode allows

indirect measurement

o Calculating areas and volumes
, Use in interior and exterior conditions,,

48277 ManuaLRevised 09-021t Page 5

1. LCD display - Large LCD screen with white back lighting helps makes it easy
to read the large-numeral measuring data clearly, even in dark conditions.

2 Keyboard

3. Positioning pin- for measurement from wal_ comers

4. Laser-receiving lens- receives the reflected laser to determine distance

5 Laser-exit aperture - emits the laser dot.

6. 1/4 inch tripod screw- for use with tripod (available separately)

7. Battery compartment - for four A,&_,batteries (available separately).

Recommended Use
Power supply

Laser

Technical Specifications

Indoors
4 "AAA" 1.5-volt batteries (available

separately)
,k=635nm, Class I[ laser,

maximum laser output<ImW

Measuring range (typically) 1-100 feet (0.3-30m)*
Measuring accuracy (typically) ±1/8 inch (±3ram)*
Smallest unit displayed 1/16 inch (1ram)
Automatic switch off: -laser: 20 seconds

-measuring tool: 5 minutes

Estimated battery life (use Up to 5000 single measurements
alkaline AAA batteries)

Optimum operating temperature 32 to !04°F (0 to 40°C)

Note: The tool's measuring range and accuracy will be reduced when it is used
in unfavorable conditions, such as in bright sunlight or when measuring to poorly

reflecting or very rough surfaces.

48277 Mar_ual Revised 09-0215

Page6

KEYBOARD FUNCTION (Fig, 2)
Please see the Operation

section of this manual for
information about the following

functions and computations..

1.. Read/Con key -turns on the
laser, takes measurements,

activates the continuous
measurement.

2., Clear key- clears the
measurements, reverts

to single distance
measurement mode,,

3. Max/Min key- activates the Maximum or Minimum measuring mode..

4_ Plus/Minus key - for addition or subtraction of measurements..
5 Mode key- changes the measuring mode among area, volume, single

Pythagorean Theorem, double Pythagorean Theorem, and single distance
measurement mode

6,,

7

Measuring reference point _Switches the measuring reference among: the
rear of the toot, the position of the tripod screw, the front of the tool, and the

positioning pin..
Unit conversion key- change units: decimal units of feet, t/16-in, increments,

decimal units of inches, 1/16-in, increments of inches, meters, and millimeters,,

Power key- turns on/off the tool..

LCD DISPLAY

Full battery indicator

Empty battery indicator

_ indicates that the measurement is taken from the positioning pin..

_! Indicates that the measurement is taken from the bottom of the too!..

_J Indicates that the measurement is taken from the position of the tripod screw.
_' Indicates that the measurement is taken from the front of the tool

Laser beam indicator
Single distance measurement

_ZZArea measurement

Volume measurement

48277 Manual_Revised_09.0211 Page 7

I''-. Single Pythagorean Theorem measurement

Double Pythagorean Theorem measurement

rain Minimum measurement indicator

max Maximum measurement indicator

.... Continuous measurement indicator

................. ..... ................. ......................................... LJL

Your laser measuring tool is a precision instrument.. Please observe the following
guidelines to ensure optimal performance

o Do not direct the laser-measuring tool towards the sun or other sources of

bright light This may cause an Error reading or inaccurate measurements.
o Do not use the laser measuring tool as a leveling tool..
o Do not operate the laser measuring tool in wet, dusty, sandy, or other

adverse environments. Such conditions may damage inner components and

affect measuring accuracy
o When the laser measuring tool is brought into a warm environment from

very cold conditions, or vice versa, allow it to come to the surrounding

temperature before use_
o Measuring errors can occur when measuring toward colorless liquids (e,g,.,

water), clean glass, Styrofoam, or similar translucent or low-density materials,
o High-gloss surfaces will deflect the laser beam and result in Error measurements.

a Very bright surroundings combined with a very low reflecting surface will

reduce the measuring range and accuracy

o Do not immerse the tool in water, Wipe off dirt with a damp, soft cloth, Do

not use aggressive cleaning agents or solutions Treat the optical surfaces
with the same care that you would apply to eyeglasses or cameras

o The accuracy of the tool must be checked before use after it has been

dropped or subjected to other mechanical stresses.

48277 ManuaLRevised_09,0211 Pa_,e 8