DeWalt DCLE34033 User manual

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ES
F
PT
DCLE34033
3 x 360° 12V/20V High Precision Line Laser
3 Láseres de Línea de alta Precisión de 360° 12 V/20 V
3 Lasers Linéaires Haute Précision 360° 12V/20V
3 x 360° 12V/20V Laser de Linha de Alta Precisão
Please read these instructions before operating the product.
Lea estas instrucciones antes de utilizar el producto.
Veuillez lire ces instructions avant d'utiliser le produit.
Leia estas instruções antes de operar o produto.

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WARNING: Read all safety warnings and all
instructions. Failure to follow the warnings
and instructions may result in electric shock,
re and/or serious injury.
WARNING: To reduce the risk of injury, read
the instruction manual.
Contents
• Laser Information
• User Safety
• Battery and Charger Safety
• Operating Tips
• Turning the Laser ON
• Checking Laser Accuracy
• Using the Laser
• Troubleshooting
• Accessories
• Service and Repairs
• Warranty
• Specications
Laser Information
The DCLE34033 3-Beam 360° Line Laser is a Class
2 laser product. It is a self-leveling laser tool that can
be used for horizontal (level) and vertical (plumb)
alignment projects.
This product complies with 21 CFR 1040.10 and
1040.11 except for conformance with IEC 60825-1 Ed.
3., as described in Laser Notice No. 56, dated May
8, 2019.
Conforms to UL STDS 61010-1 & 2595
Certified to CSA STD C22.2 No. 61010-1
Supplier’s Declaration of Conformity
47 CFR § 2.1077 Compliance Information
Unique Identier: DCLE34033
Responsible Party – U.S. Contact Information
DEWALT
701 East Joppa Road
Towson, Maryland 21286
www.DEWALT.com
FCC Compliance Statement
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful
interference in a residential installation. This equipment
generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance
with the instructions, may cause harmful interference
to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful
interference to radio and television reception, which can
be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV
technician for help.
ISED Compliance Statement
This device contains license-exempt transmitter(s)/
receiver(s) that comply with Innovation, Science, and
Economic Development Canada's license-exempt
RSS(s). Operation is subject to the following two
conditions:
1. This device may not cause interference.
2. This device must accept any interference, including
interference that may cause undesired operation of
the device.

12
EUser Safety
Safety Guidelines
The denitions below describe the level of severity for
each signal word. Please read the manual and pay
attention to these symbols.
DANGER: Indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
WARNING: Indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
CAUTION: Indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury.
NOTICE: Indicates a practice not related to personal
injury which, if not avoided, may result in property
damage.
If you have any questions or comments about
this or any DEWALT tool,
call 1-800-4-DEWALT (1-800-433-9258)
or go to www.DEWALT.com.
WARNING:
Never modify the tool or any part of it. Damage
to the laser or personal injury could result.
WARNING:
Read and understand all instructions.
Failure to follow the warnings and instructions
may result in electric shock, re and/or serious
injury.
SAVE THESE INSTRUCTIONS
WARNING:
Laser Radiation Exposure. Do not
disassemble or modify the laser level.
There are no user serviceable parts inside.
Serious eye injury could result.
WARNING:
Hazardous Radiation. Use of controls or
adjustments or performance of procedures
other than those specied herein may result in
hazardous radiation exposure.
CAUTION: Keep ngers clear of the back
plate and stud when mounting with magnets.
Fingers may become pinched.
CAUTION: Do not stand underneath the laser
when it is mounted with the magnet bracket.
Serious personal injury or damage to the laser
may result if the laser falls.
The label on your laser may include the following
symbols.
Symbol Meaning
V Volts
mW Milliwatts
Laser Warning
nm Wavelength in nanometers
2 Class 2 Laser
Warning Labels
For your convenience and safety, the following labels
are on your laser (Figure C8).

13
E
WARNING: To reduce the risk of injury,
user must read instruction manual.
WARNING: LASER RADIATION. DO
NOT STARE INTO BEAM. Class 2
Laser Product.
WARNING: Keep clear of magnet.
Magnet hazard can disturb pacemaker
operation and result in serious injury
or death.
• If the equipment is used in a manner not
specied by the manufacturer, the protection
provided by the equipment may be impaired.
• Do not operate the laser in explosive
atmospheres, such as in the presence of
ammable liquids, gases, or dust. This tool may
create sparks which may ignite the dust or fumes.
• Store an idle laser out of reach of children and
other untrained persons. Lasers are dangerous in
the hands of untrained users.
• Tool service MUST be performed by qualied
repair personnel. Service or maintenance performed
by unqualied personnel may result in injury. To
locate your nearest DeWALT service center go to
www.DeWALT.com.
• Do not use optical tools such as a telescope or
transit to view the laser beam. Serious eye injury
could result.
• Do not place the laser in a position which may
cause anyone to intentionally or unintentionally
stare into the laser beam. Serious eye injury could
result.
• Do not position the laser near a reective
surface which may reect the laser beam toward
anyone’s eyes. Serious eye injury could result.
• Turn the laser off when it is not in use. Leaving
the laser on increases the risk of staring into the
laser beam.
• Do not modify the laser in any way. Modifying the
tool may result in hazardous laser radiation exposure.
• Do not operate the laser around children or allow
children to operate the laser. Serious eye injury
may result.
• Do not remove or deface warning labels. If labels
are removed, the user or others may inadvertently
expose themselves to radiation.
• Position the laser securely on a level surface. If
the laser falls, damage to the laser or serious injury
could result.
Personal Safety
• Stay alert, watch what you are doing, and use
common sense when operating the laser. Do not use
the laser when you are tired or under the inuence
of drugs, alcohol, or medication. A moment of
inattention while operating the laser may result in
serious personal injury.
• Use personal protective equipment. Always wear
eye protection. Depending on the work conditions,
wearing protective equipment such as a dust
mask, non-skid safety shoes, hard hat, and hearing
protection will reduce personal injury.
Tool Use and Care
• Do not use the laser if the Power/Transport Lock
switch does not turn the laser on or off. Any tool that
cannot be controlled with the switch is dangerous and
must be repaired.
• Follow instructions in the Maintenance section of
this manual. Use of unauthorized parts or failure to

14
Efollow Maintenance instructions may create a risk of
electric shock or injury.
Battery and Charger Safety
WARNING: Batteries can explode, or leak,
and can cause injury or re. To reduce
this risk:
The battery pack is not fully charged out of the carton.
Before using the battery pack and charger, read the
safety instructions below and then follow charging
procedures outlined. When ordering replacement
battery packs, be sure to include the catalog number
and voltage.
READ ALL INSTRUCTIONS
Important Safety Instructions
for All Battery Packs
WARNING: Read all safety warnings,
instructions, and cautionary markings for the
battery pack, charger and product. Failure to
follow the warnings and instructions may result
in electric shock, re and/or serious injury.
• Do not charge or use the battery pack in
explosive atmospheres, such as in the
presence of flammable liquids, gases or dust.
Inserting or removing the battery pack from the
charger may ignite the dust or fumes.
• NEVER force the battery pack into the charger.
DO NOT modify the battery pack in any way
to fit into a non‑compatible charger as battery
pack may rupture causing serious personal
injury. Consult the chart at the end of this manual
for compatibility of batteries and chargers.
• Charge the battery packs only in
DeWALT chargers.
• DO NOT splash or immerse in water or
other liquids.
• DO NOT allow water or any liquid to enter
battery pack.
• Do not store or use the tool and battery pack
in locations where the temperature may reach
or exceed 104 °F (40 °C) (such as outside
sheds or metal buildings in summer). For best
life store battery packs in a cool, dry location.
NOTE: Do not store the battery packs in a tool
with the trigger switch locked on. Never tape
the trigger switch in the ON position.
• Do not incinerate the battery pack even if it is
severely damaged or is completely worn out.
The battery pack can explode in a fire. Toxic fumes
and materials are created when lithium‑ion battery
packs are burned.
• Do not expose a battery pack or appliance
to re or excessive temperature. Exposure to
re or temperature above 265 °F (130 °C) may
cause explosion.
• If battery contents come into contact with the
skin, immediately wash area with mild soap
and water. If battery liquid gets into the eye, rinse
water over the open eye for 15 minutes or until
irritation ceases. If medical attention is needed,
the battery electrolyte is composed of a mixture of
liquid organic carbonates and lithium salts.
• Contents of opened battery cells may cause
respiratory irritation. Provide fresh air. If
symptoms persist, seek medical attention.
• Battery liquid may be flammable if exposed to
spark or flame.
• Never attempt to open the battery pack for
any reason. If the battery pack case is cracked
or damaged, do not insert into the charger.
Do not crush, drop or damage the battery pack.
Do not use a battery pack or charger that has
received a sharp blow, been dropped, run over
or damaged in any way (e.g., pierced with a nail,
hit with a hammer, stepped on). Damaged battery
packs should be returned to the service center
for recycling.

15
E
Storage Recommendations
The best storage place is one that is cool and dry, away
from direct sunlight and excess heat or cold. Store the
fully charged battery pack out of the charger.
Battery Pack Cleaning
Instructions
Dirt and grease may be removed from the exterior
of the battery pack using a cloth or soft non-metallic
brush. Do not use water or any cleaning solutions.
Fuel Gauge Battery Packs (Fig. C)
Some battery packs include a fuel gauge. When
the fuel gauge button is pressed and held, the LED
lights will indicate the approximate level of charge
remaining. This does not indicate tool functionality and
is subject to variation based on product components,
temperature, and end-user application.
Transportation
WARNING: Fire hazard. Do not store,
carry, or transport the battery pack so that
metal objects can contact exposed battery
terminals. For example, do not place the
battery pack in aprons, pockets, tool boxes,
product kit boxes, drawers, etc., with loose
nails, screws, keys, coins, hand tools, etc.
When transporting individual battery packs,
make sure that the battery terminals are
protected and well insulated from materials
that could contact them and cause a short
circuit. NOTE: Li‑ion battery packs should not
be put in checked baggage on airplanes and
must be properly protected from short circuits
if they are in carry‑on baggage.
The RBRC®Seal
Please take your spent battery packs
to an authorized DeWALT service
center or to your local retailer for
recycling. In some areas, it is illegal
to place spent battery packs in the trash. You may also
contact your local recycling center for information on
where to drop off the spent battery pack. Do not place
in curbside recycling. For more information visit www.
call2recycle.org. or call the toll free number in the
RBRC® Seal.
RBRC® is a registered trademark of Call
2 Recycle, Inc.
Powering the Laser
This laser can be powered by either of these battery
packs:
• A DeWALT 12V MAX* Li-ion Battery Pack.
*Maximum initial battery voltage (measured without a
workload) is 12 volts. Nominal voltage is 10.8.
• A DeWALT 20V MAX* Li-ion Battery Pack.
*Maximum initial battery voltage (measured without a
workload) is 20 volts. Nominal voltage is 18.
Battery Type Battery Pack
12V
DCB120, DCB121, DCB122,
DCB123, DCB124, DCB125,
DCB126, DCB127
20V
DCB201, DCB203, DCB203BT,
DCB204, DCB204BT, DCB205,
DCB205BT, DCB206, DCB207,
DCB208, DCB230, DCB240,
DCBP520, DCBP034
Use only DeWALT battery packs and chargers. Use
of any other batteries may create a risk of re.
Important Safety Instructions
for All Battery Chargers
WARNING: Read all safety warnings,
instructions, and cautionary markings for
the battery pack, charger and product.
Failure to follow the warnings and
instructions may result in electric shock,
fire and/or serious injury.

16
E• DO NOT attempt to charge the battery pack
with any chargers other than a DeWALT
charger. DeWALT chargers and battery packs are
specifically designed to work together.
• These chargers are not intended for any uses
other than charging DeWALT rechargeable
battery packs. Charging other types of battery
packs may cause them to overheat and burst,
resulting in personal injury, property damage, fire,
electric shock or electrocution.
• Do not expose the charger to rain or snow.
• Do not allow water or any liquid to
enter charger.
• Pull by the plug rather than the cord when
disconnecting the charger. This will reduce the
risk of damage to the electric plug and cord.
• Make sure that the cord is located so that it will
not be stepped on, tripped over or otherwise
subjected to damage or stress.
• Do not use an extension cord unless it is
absolutely necessary. Use of improper extension
cord could result in risk of fire, electric shock
or electrocution.
• When operating a charger outdoors, always
provide a dry location and use an extension
cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of
electric shock.
• An extension cord must have adequate wire
size (AWG or American Wire Gauge) for safety.
The smaller the gauge number of the wire, the
heavier the cord and thus the greater its capacity.
An undersized cord will cause a drop in line
voltage resulting in loss of power and overheating.
The following table shows the correct size to use
depending on total length of all extension cords
plugged together, and nameplate ampere rating. If
in doubt, use the next heavier gauge.
Minimum Gauge for Cord Sets
Volts Total Length of Cord in Feet
(meters)
120V 25 (7.6) 50
(15.2)
100
(30.5)
150
(45.7)
Ampere Rating
American Wire Gauge
More Than Not More
Than
0 6 18 16 16 14
610 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not
Recommended
• Do not place any object on top of the charger
or place the charger on a soft surface that
might block the ventilation slots and result in
excessive internal heat. Place the charger in a
position away from any heat source. The charger
is ventilated through slots in the top and the
bottom of the housing.
• Do not operate the charger with a damaged
cord or plug. Have them replaced immediately.
• Do not operate the charger if it has received
a sharp blow, been dropped or otherwise
damaged in any way. Take it to an authorized
service center.
• Do not disassemble the charger; take it to
an authorized service center when service or
repair is required. Incorrect reassembly may
result in a risk of electric shock, electrocution
or fire.
• The charger is designed to operate on
standard 120V household electrical power. Do
not attempt to use it on any other voltage. This
does not apply to the vehicular charger.
• Foreign materials of a conductive nature, such
as, but not limited to, grinding dust, metal
chips, steel wool, aluminum foil or any buildup
of metallic particles should be kept away from
the charger cavities and ventilation slots.

17
E
• Always unplug the charger from the power
supply when there is no battery pack in
the cavity.
Charging a Battery (Fig. A–C)
1. If the DEWALT 12V/20V MAX* Li-ion battery pack
is attached to the laser, remove it.
• While pressing down on the release button on the
battery pack (Figure B1), pull the battery pack
up to unlock it from the laser.
• Pull the battery pack the rest of the way up and
out of the laser (Figure B2).
2. Plug the charger into an appropriate outlet.
3. Insert and fully seat battery pack (Fig. A1).
The red charging light(s) will continuously blink
while charging.
4. Charging is complete when the red charging
light(s) remain(s) continuously ON. Battery pack
can be left in charger or removed (Fig. A3).
Some chargers require the battery pack release
button to be pressed for removal (Fig. A2).
WARNING: Only charge batteries in air
temperature over 40 ° F (4.5 ° C) and below
104 ° F (+40 ° C).
5. Charger will not charge a faulty battery pack,
which may be indicated by the charging light(s)
staying OFF. Take charger and battery pack to an
authorized service center if light(s) stay(s) OFF.
NOTE: Refer to label near charging light(s) on
charger for blink patterns. Older chargers may
have additional information and/or may not have a
yellow indicator light.
NOTE: To remove the battery pack, some
chargers require the battery pack release button
to be pressed.
6. Slide the battery pack down in the laser until it
snaps in place (Figure A4).
Viewing the Battery Meter
When the laser is ON, the battery meter on the keypad
(Figure C7) indicates how much power remains.
• The bottom LED will illuminate and ash when the
battery level is low (10%). The laser may continue
to operate for a short time while the battery power
continues to drain, but the beam(s) will quickly dim.
• After the 12V/20V MAX Li-ion battery is charged, and
the laser is turned ON again, the laser beam(s) will
return to full brightness and the battery indicator level
will indicate full capacity.
• If all 4 LEDs on the battery meter remain ON, this
indicates that the laser is not fully powered OFF.
When the laser is not in use, make sure the Power/
Transport Lock switch is placed to the LEFT to the
Locked/OFF position (Figure C2).
Hot/Cold Pack Delay
When the charger detects a battery pack that is too
hot or too cold, it automatically starts a Hot/Cold Pack
Delay, suspending charging until the battery pack has
reached an appropriate temperature. The charger then
automatically switches to the pack charging mode. This
feature ensures maximum battery pack life.
A cold battery pack may charge at a slower rate than a
warm battery pack.
The hot/cold pack delay will be indicated by the
red light(s) continuing to blink but with the yellow
light continuously ON. Once the battery pack has
reached an appropriate temperature, the yellow
light will turn OFF and the charger will resume the
charging procedure.
DCB118 and DCB1112 Chargers
The DCB118 and DCB1112 chargers are equipped with
an internal fan designed to cool the battery pack. The
fan will turn on automatically when the battery pack
needs to be cooled.
Never operate the charger if the fan does not operate
properly or if ventilation slots are blocked. Do not permit
foreign objects to enter the interior of the charger.
Electronic Protection System
Li-Ion tools are designed with an Electronic Protection
System that will protect the battery pack against

18
Eoverloading, overheating or deep discharge. The tool
will automatically turn off and the battery pack will need
to be recharged.
Important Charging Notes
1. Longest life and best performance can be
obtained if the battery pack is charged when
the air temperature is between 65 °F – 75 °F
(18 °C– 24 °C). DO NOT charge when the battery
pack is below +40 °F (+4.5 °C), or above +104 °F
(+40 °C). This is important and will prevent serious
damage to the battery pack.
2. The charger and battery pack may become warm
to the touch while charging. This is a normal
condition, and does not indicate a problem. To
facilitate the cooling of the battery pack after use,
avoid placing the charger or battery pack in a
warm environment such as in a metal shed or an
uninsulated trailer.
3. If the battery pack does not charge properly:
a. Check operation of receptacle by plugging in a
lamp or other appliance;
b. Check to see if receptacle is connected to a
light switch which turns power off when you turn
out the lights;
c. If charging problems persist, take the tool,
battery pack and charger to your local
service center.
4. You may charge a partially used pack whenever
you desire with no adverse effect on the
battery pack.
Charger Cleaning Instructions
WARNING: Shock hazard. Disconnect the
charger from the AC outlet before cleaning.
Dirt and grease may be removed from the
exterior of the charger using a cloth or soft
non‑metallic brush. Do not use water or any
cleaning solutions.
Operating Tips
• To extend battery life per charge, turn the laser off
when it is not in use.
• To ensure the accuracy of your work, check the
laser calibration often. Refer to Checking Laser
Accuracy.
• Before attempting to use the laser, make sure it is
positioned securely, on a smooth, at stable surface
that is level in both directions.
• To increase beam visibility, use a Laser Target Card
(Figure M) to help find the beam.
• Always mark the center of the beam created by the
laser.
• Extreme temperature changes can cause movement
or shifting of building structures, metal tripods,
equipment, etc., which can effect accuracy. Check
your accuracy often while working.
• If the laser has been dropped, check to make sure
your laser is still calibrated. Refer to Checking Laser
Accuracy.
Turning the Laser On
Place the laser on a at level surface. Slide the Power/
Transport Lock switch C2to the right to unlock/turn
ON the laser.
Each laser line is powered on by pressing its button on
the keypad (Figure C3). Pressing the button again
turns the laser line off. The laser lines can be powered
one at a time or all at the same time.
Button Displays
Horizontal laser line (Figure C4)
Side vertical laser line (Figure C5)
Front vertical laser line (Figure C6)

19
E
When the laser is not in use, slide the Power/Transport
Lock switch to the left in the OFF/Locked position. If
the Power/Transport Lock switch is not placed in the
lock position, all 4 LEDs will continuously ash on the
Battery Meter.
Checking Laser Accuracy
The laser tools are sealed and calibrated at the factory.
It is recommended that you perform an accuracy check
prior to using the laser for the rst time (in case the
laser was exposed to extreme temperatures) and then
regularly to ensure the accuracy of your work. When
performing any of the accuracy checks listed in this
manual, follow these guidelines:
• Use the largest area/distance possible, closest to the
operating distance. The greater the area/distance,
the easier to measure the accuracy of the laser.
• Place the laser on a smooth, at, stable surface that
is level in both directions.
• Mark the center of the laser beam.
Horizontal Beam - Scan Direction
Checking the horizontal scan calibration of the laser
requires two walls 30′ (9m) apart. It is important to
conduct a calibration check using a distance no shorter
than the distance of the applications for which the tool
will be used.
1. Place the laser against the end of the wall on a
smooth, at, stable surface that is level in both
directions (Figure D1).
2. Move the Power/Transport Lock switch to the right
to turn the laser ON.
3. Press to turn on the horizontal beam.
4. At least 30′ (9m) apart along the laser beam, mark
aand b.
5. Turn the laser 180º.
6. Adjust the height of the laser so the center of the
beam is aligned with a(Figure D2).
7. Directly above or below b, mark calong the laser
beam (Figure D3).
8. Measure the vertical distance between band c.
9. If your measurement is greater than the Allowable
Distance Between band cfor the
corresponding Distance Between Walls in the
following table, the laser must be serviced at an
authorized service center.
Distance
Between Walls
Allowable Distance
Between band c
25’ 1/8”
35’ 3/16”
50’ 1/4”
75' 3/8"
100' 1/2"
Distance
Between Walls
Allowable Distance
Between band c
10.0 m 4 mm
15.0 m 6 mm
20.0 m 8 mm
23.0 m 10 mm
30.0 m 12 mm
Horizontal Beam - Pitch Direction
Checking the horizontal pitch calibration of the
laser requires a single wall at least 30′(9m) long.
It is important to conduct a calibration check using
a distance no shorter than the distance of the
applications for which the tool will be used.
1. Place the laser against the end of the wall on a
smooth, at, stable surface that is level in both
directions (Figure E1).
2. Move the Power/Transport Lock switch to the right
to turn the laser ON.
3. Press to turn on the horizontal beam.

20
E4. At least 30′ (9m) apart along the laser beam, mark
aand b.
5. Move the laser to the opposite end of the wall
(Figure E2).
6. Position the laser toward the rst end of the same
wall and parallel to the adjacent wall.
7. Adjust the height of the laser so the center of the
beam is aligned with b.
8. Directly above or below a, mark calong the laser
beam (Figure E3).
9. Measure the distance between aand c.
10. If your measurement is greater than the Allowable
Distance Between aand cfor the correspond-
ing Distance Between Walls in the following table,
the laser must be serviced at an authorized service
center.
Distance
Between Walls
Allowable Distance
Between aand c
25’ 1/8"
35’ 3/16"
50’ 1/4"
75' 3/8"
100' 1/2"
Distance
Between Walls
Allowable Distance
Between aand c
10.0 m 4 mm
15.0 m 6 mm
20.0 m 8 mm
23.0 m 10 mm
30.0 m 12 mm
Vertical Beam
Checking the vertical (plumb) calibration of the
laser can be most accurately done when there is a
substantial amount of vertical height available, ideally
30’ (9m), with one person on the oor positioning
the laser and another person near a ceiling to mark
the position of the beam. It is important to conduct a
calibration check using a distance no shorter than the
distance of the applications for which the tool will be
used.
1. Place the laser on a smooth, at, stable surface
that is level in both directions (Figure F1).
2. Move the Power/Transport Lock switch to the right
to turn the laser ON.
3. Press and to turn on both vertical beams.
4. Mark two short lines where the beams cross
a, band also on the ceiling c, d. Always mark
the center of the beam's thickness (Figure F2).
5. Pick up and rotate the laser 180º, and position it
so the beams line up with the marked lines on the
level surface ( e, f) (Figure F3).
6. Mark two short lines where the beams cross on the
ceiling g, h.
7. Measure the distance between each set of marked
lines on the ceiling ( c, gand d, h). If the mea-
surement is greater than the values shown below,
the laser must be serviced at an authorized service
center.
Ceiling Height
Allowable Distance
Between Marks
8’ 3/64"
12’ 1/16"
14’ 5/64"
18’ 3/32"
30’ 5/32"
Ceiling Height
Allowable Distance
Between Marks
2.5 m 1.0 mm
3.5 m 1.5 mm
4.0 m 2.0 mm
6.0 m 2.5 mm
9.0 m 4.0 mm