David White 3900HV User manual

3900HV
www.davidwhite.us.com
3900HV
Rotary Laser Owner’s Guide
FOR CUSTOMER SERVICE, PARTS AND REPAIR CALL
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IMPORTANT: IMPORTANT: IMPORTANTE:
Read Before Using Lire avant usage Leer antes de usar

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With David White
your sights are set on
precision and accuracy.
Congratulations! You’ve purchased a David White builder/contractor
instrument, known throughout the world for precision and accuracy.
The purpose of this user’s guide is to acquaint you with the instrument, its
components, safety, proper care and handling.
Our levels, level-transits and transits are constructed to withstand
extremely rugged field use. Like all precision instruments, however, they
should be treated with reasonable care to prolong life and accuracy.
All instruments are adjusted when they are shipped from the factory. It
is the customer’s responsibility to check and to ensure instruments are
adjusted prior to using.
David White is not responsible for errors caused by instruments that are
out of adjustment.
Contact your distributor, dealer or David White for information on the
nearest facility to check if your instrument is properly adjusted.
All specifications are subject to change without notice.

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3900HV
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3900HV
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GENERAL SAFETY RULES
!WARNING Read all instructions. Failure to follow all instructions listed
below may result in hazardous radiation exposure, electric
shock, fire and/or serious injury.
If glass light house breaks when dropped, contact customer service
immediately. Broken glass can cause laceration hazard and unit to
lose its IP rating.
IEC 60825-1:2007-03
<
1 mW, 635 nm
DO NOT direct the laser beam at persons or animals and do not
stare into the laser beam yourself. This tool produces laser class 2
laser radiation and complies with 21 CFR 1040.10 and 1040.11
except for deviations pursuant to Laser Notice No. 50, dated June
24, 2007. This can lead to persons being blinded.
DO NOT remove or deface any warning or caution labels.
Removing labels increases the risk of exposure to laser radiation.
Use of controls or adjustments or performance of procedures other than those
specified in this manual, may result in hazardous radiation exposure.
ALWAYS make sure that any bystanders in the vicinity of use are made aware
of the dangers of looking directly into the laser tool.
DO NOT place the laser tool in a position that may cause anyone to stare into
the laser beam intentionally or unintentionally. Serious eye injury could result.
ALWAYS position the laser tool securely. Damage to the laser tool and/or
serious injury to the user could result if the laser tool falls.
ALWAYS use only the accessories that are recommended by the manufacturer
of your laser tool. Use of accessories that have been designed for use with
other laser tools could result in serious injury or unsatisfactory performance.
DO NOT use this laser tool for any purpose other than those outlined in this
manual. This could result in serious injury or unsatisfactory performance.
DO NOT leave the laser tool “ON” unattended in any operating mode.
DO NOT disassemble the laser tool. There are no user serviceable parts inside.
Do not modify the product in any way. Modifying the laser tool may result in
hazardous laser radiation exposure.

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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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or transits to view the laser beam.
Serious eye injury could result.
DO NOT stare directly at the laser
beam or project the laser beam
directly into the eyes of others.
Serious eye injury could result.
Use caution when using instruments
in the vicinity of electrical hazards.
Magnets
IEC 60825-1:2007-03
<
1 mW, 635 nm
Keep the tool and laser
detector away from
cardiac pacemakers. The
magnets of the tool and
laser detector generate a field that
can impair the function of cardiac
pacemakers.
Keep the tool and laser detector away
from magnetic data medium and
magnetically-sensitive equipment.
The effect of the magnets of the
tool and laser detector can lead to
irreversible data loss.
Use and care
Use the correct tool for your
application. The correct tool will do
the job better and safer.
Do not use the tool if the switch does
not turn it on and off. Any tool that
cannot be controlled with the switch
is dangerous and must be repaired.
Store idle tool out of the reach of
children and do not allow persons
unfamiliar with the tool or these
instructions to operate the tool.
Tools are dangerous in the hands of
untrained users.
Maintain tools. Check for
misalignment or binding of moving
parts, breakage of parts and any
other condition that may affect the
operation. If damaged, repair tool
before use. Many accidents are
caused by poorly maintained tools.
Use the tool, accessories, etc., in
accordance with these instructions
and in the manner intended for the
particular type of tool, taking into
account the working conditions and
the work to be performed. Use of
the tool for operations different from
those intended could result in a
hazardous situation.
SAVE THESE INSTRUCTIONS.
INTENDED USE
The instrument is intended for determining and checking precise horizontal
and vertical lines. The instrument is suitable for indoor and outdoor use.

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FEATURES
The numbering of the product
features shown refers to the
illustration of the instrument on the
graphic page.
1. Rotating Laser Beacon
2. Glass Lighthouse
3. Control Keypad
3a. On/Off button with Indicator
3b. Manual Mode Button with
Indicator
3c. ADS Button with Indicator
3d. Remote Sensor Window
4. Battery Compartment Screw
5. 5/8-11 Tripod Mount
6. Charger Port
7. Window for Plumb Beam
8. Trivet Attachment for Vertical
Laydown Positioning
9. 5/8-11 Tripod Mount
10. Mounting Clip with Lever
11. Trivet Hinge
12. Slots for Mounting
13. Alignment Marker for Laydown
Position
TECHNICAL DATA
Description 3900HV
Accuracy, Horizontal leveling 3/16-in at 100-ft
(4.5mm at 30m)
Accuracy, Vertical/Laydown 1/4-in at 100-ft
(6mm at 30m)
Working Range (diameter)
- without Laser Detector, approx.
- with Laser Detector, apprx.
100-ft (30m)
1000-ft (300m)
Rotational Speed (with Remote Control Only) 0, 120, 300, 600 RPM
Leveling Type (Degrees) Electronic (±5º)
Beam Rating Class 2M 635nm

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PREPARATIONS
Description 3900HV
Power Supply 4-AA Cell, NiMh
Rechargeable Approx.
25hr.(Ni-MH);
Approx. 20hr (Alkaline)
Water/Dust Protection IP54
Dimension (with Trivet Attachment) 5.0 x 5.9 x 6.4-in
(127 x 150 x 163 mm)
Weight: 2.9 lb (1.3kg)
Inserting/Replacing Batteries
Rechargeable or alkaline batteries
are suitable for use to power your
instrument.
!WARNING Always replace all
alkaline batteries at
the same time. Only use batteries
from one brand and with the identical
capacity.
Remove the batteries/pack from the
tool when not using it for extended
periods. When storing for extended
periods, the batteries can corrode and
discharge themselves.
Un-screw the battery compartment
screw 4 at the bottom front of
instrument base. Remove the
batteries.
Use either alkaline batteries or
Ni-Mh batteries. When inserting
alkaline batteries, pay attention to
the correct polarity according to the
representation on the inside of the
battery compartment. Always replace
all batteries at the same time. Only
use batteries from one brand and
with the identical capacity.
Secure by tighten the screw 4into
the bottom of instrument base.
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.

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OPERATION
!WARNING Do not subject the
instrument to
extreme temperatures or variations in
temperature. As an example, do not
leave it in vehicles for long time. In
case of large variations in
temperature, allow the instrument to
adjust to the ambient temperature
before putting it into operation. In
case of extreme temperatures or
variations in temperature, the
accuracy of the instrument can be
impaired.
Avoid heavy impact to or falling
down of the instrument. After severe
exterior effects to the instrument,
it is recommended to carry out an
accuracy check each time before
continuing to work.
Setting Up the Instrument
Position the instrument on a firm
surface in the horizontal or vertical
position, mount it to a tripod or to the
trivet mount 8with alignment unit.
The instrument reacts sensitively
to ground vibrations and position
changes. Therefore, pay attention
that the position of the instrument is
stable in order to avoid operational
interruptions due to re-leveling.
Switching On and Off
Press the Power ON/OFF 3a keypad
and allow the laser instrument to
self-level. If the power indicator LED
blinks, the voltage of the batteries
is low and batteries need to be
replaced or recharged.
The laser instrument can stand
alone on a level, sturdy surface
or preferably secured to a 5/8-11
tripod.
When the instrument is powered ON
it will automatically self-level. After
self-leveling, the laser instrument will
begin operating in Rotation Mode at
the speed of 600 RPM.
If the instrument is placed improperly,
or the slope of instrument exceeds
the range of +/-5°, the Power
indicator LED and the laser beam will
blink at the same time.
The instrument will shut down
automatically if the unit exceeds the
self-leveling system range for more
then 5 minutes.

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OPERATION MODES
Variable Rotation Speed
(Remote Only)
The Variable Rotation Speed Mode
keypad
180°
10°
45°
90°
RPM
on the remote control will
give you the option of increasing or
decreasing the speed of the rotating
laser. Repeatedly pressing the
180°
10°
45°
90°
RPM
keypad will adjust the speed from
600, 300, 120, and 0 RPM.
Scanning or Sweeping
(Remote Only)
The Scanning Mode on the remote
control creates a shorter, brighter
laser “chalk line” that can be used for
leveling or plumbing. This feature can
also be used to keep the instrument
from interfering with other lasers
and detectors on site. Pressing the
Scanning Mode keypad
180°
10°
45°
90°
RPM
, will
lengthen or shorten the scan area
of the laser beam. There are five (5)
preset angles of 0°, 10°, 45°, 90°,
and 180°.
While in Scanning Mode, the
position of the scanning area can be
adjusted. Press the Clock-Wise
180°
10°
45°
90°
RPM
and Counter-Clock-Wise
180°
10°
45°
90°
RPM
Beam
Positioning keypads on the remote
control.
Slope/Automatic Mode
When the instrument is set upright for
horizontal rotation, the slope can be
adjusted by using Manual Mode 3b.
Press the Manual/Automatic keypad
180°
10°
45°
90°
RPM
, the instrument will enter into the
mode of manual adjustment.
The slope/automatic mode can also
be switch ON and OFF with the
remote control.
Anti-Drift System (ADS)
Enable to the ADS system 3c to alert
user when laser has been disturbed.
Press the ADS button
180°
10°
45°
90°
RPM
to activate.
When the LED is blinking slowly, the
laser is in H.I Alert mode. When the
light is blinking quickly, the laser level
will not level as it has been disturbed
and needs reset.
Vertical Laydown Positioning
Using the trivet 8, place the laser
instrument in the laydown position on
a flat, level surface.
Press the Power ON/OFF 3a keypad.
Allow the instrument to self-level.

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ACCURACY CHECK
The ambient temperature has
the greatest influence. Especially
temperature differences occurring
from the ground upward can divert
the laser beam. The deviations play a
role in excess of approx. 65-ft (20m)
measuring distance and can easily
reach two to four times the deviation
at 330-ft (100m). Because the largest
difference in temperature layers is
close to the ground, the instrument
should always be mounted on a
tripod when measuring distances
exceeding 65-ft (20m). If possible,
also set up the instrument in the
center of the work area.
Checking the Leveling Accuracy
Apart from exterior influences,
device-specific influences (such as
heavy impact or falling down) can
lead to deviations. Therefore, check
the accuracy of the instrument each
time before starting your work. A
free measuring distance of 165-ft
(50m) on a firm surface is required for
the check. A reversal measurement
must be carried out over both axes X
and Y (each positive and negative; 4
complete measurements).
– Mount the instrument in the
horizontal position onto a tripod
or place it on a firm and level
surface 100-ft (30m) from a wall.
Switch the instrument on. Position
the X-axis to aim to wall or target
plate.
100 ft (30 m)
H1
Y1
100 ft (30 m)
H1
H2
Y2
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1
B
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1
D
H3 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1 H2
B
D
180°
100 ft (30 m)
H1
X1
100 ft (30 m)
H1
H2
X2
D
180°
180°
180°
3900HV
– After the leveling, mark the center of
the laser beam on wall (point H1).
– Rotate the instrument by 180°,
allow it to level in and mark the
center point of the laser beam on
the wall (point H2).
100 ft (30 m)
H1
Y1
100 ft (30 m)
H1
H2
Y2
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1
B
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1
D
H3 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1 H2
B
D
180°
100 ft (30 m)
H1
X1
100 ft (30 m)
H1
H2
X2
D
180°
180°
180°
3900HV
– The difference Dof both marked
points H1 and H2 on wall is the
actual deviation of the instrument
for the measured axis.

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The value of D(deviation) should be
less than or equal to 3/16-in (4.5mm).
Repeat the measuring procedure for
the Y-axis. Position the Y-axis to aim
to a wall or target plate.
100 ft (30 m)
H1
Y1
100 ft (30 m)
H1
H2
Y2
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1
B
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1
D
H3 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1 H2
B
D
180°
100 ft (30 m)
H1
X1
100 ft (30 m)
H1
H2
X2
D
180°
180°
180°
3900HV
– After the leveling, mark the center
of the laser beam on wall (point
H1).
– Rotate the instrument by 180°,
allow it to level in and mark the
center point of the laser beam on
the wall (point H2).
100 ft (30 m)
H1
Y1
100 ft (30 m)
H1
H2
Y2
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1
B
100 ft (30 m)
1.5-ft
(0.5 m)
A
H1 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1
D
H3 H2
B
100 ft (30 m) 1.5-ft
(0.5 m)
A
H1 H2
B
D
180°
100 ft (30 m)
H1
X1
100 ft (30 m)
H1
H2
X2
D
180°
180°
180°
3900HV
– The difference Dof both marked
points H1 and H2 on wall is the
actual deviation of the instrument
for the measured axis.
The value of D(deviation) in either
axis should be less than or equal to
3/16-in (4.5mm).
If the instrument should exceed
the maximum deviation in anyone
of the measuring procedures, have
it checked at a SitePro after-sales
service agent.

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The 3900HV includes a remote
control.
!WARNING Have the remote
control repaired
only through a qualified repair person
and only using identical replacement
parts. This will ensure that the
functionality of the remote control is
maintained.
Do not operate the remote control in
explosive atmospheres, such as in
the presence of flammable liquids,
gases or dusts. Sparks can be
created in the remote control which
may ignite the dust or fumes.
The remote control can be used up
to a maximum of 65 feet (20m) away
from the instrument.
The remote must be pointed
towards the instrument for proper
operation. All the features of the
4200HV can be controlled using the
remote.
Requires 2 ‘AA’ Alkaline batteries.
RC420 REMOTE CONTROL
LD20
RC390
RPM
180°
10°
45°
90°
4
9
10
5 6
3
2 1 8 7
c b e fg
a
d

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LD20 DETECTOR
The detector aids in locating and targeting a visible or invisible beam emitted by
a rotary laser instrument; perfect for use in outdoor conditions, where sunlight
and distance may make locating the beam more difficult.
The laser detector includes a rod clamp which allows to mount the detector
onto square, round or oval sighting rods.
LD20 FEATURES
LD20
RC390
RPM
180°
10°
45°
90°
4
9
10
5
6
3
2
1
8
7
c
b
e
fg
a
d

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Inserting/Replacing the Battery
9V alkaline battery is recommended
for the tool. Pull the latch of battery lid
outward and open the battery lid.
When the batteries are low, the
battery low indicator gwill display.
Remove the battery when not using it
for extended periods. When storing
for extended periods, the battery can
corrode and discharge.
LD20 PREPARATIONS
The numbering of the product
features shown refers to the
illustration of the tool above.
1. On/Off switch
2. Center mark
3. LCD Display
3a. “Fine” adjustment indicator
3b. “Coarse” adjustment indicator
3c. Direction indicator “move
downward”
3d. Center indicator
3e. Direction indicator “move upward”
3f. Audio signal indicator
3g. Battery low indicator
4. Reception area for the laser beam
5. Button for adjustment of measuring
accuracy
6. Spirit level
7. Speaker
8. Audio signal button
9. Locking screw for leveling rod
10. Magnetic mounts

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Store and transport the tool only in
the supplied protective case.
Keep the tool clean at all times.
Do not immerse the tool into water or
other fluids.
Wipe off debris using a moist and soft
cloth. Do not use any cleaning agents
or solvents.
Regularly clean the surfaces at the
exit opening of the laser in particular,
and pay attention to any fluff of fibers.
If the tool should fail despite the care
taken in manufacturing and testing
procedures, repair should be carried
out by an authorized after-sales
service center for Dave White’s SitePro
instruments.
In all correspondence and spare parts
orders, please always include the
model number and serial number of
the instruments.
All precision instruments should
be cleaned, lubricated, checked
and adjusted ONLY at a qualified
instrument repair station or by the
manufacturer, at least once a year.
In case of repairs, send in the
instrument packed in its protective
case.
ENVIRONMENT PROTECTION
Recycle raw materials
& batteries instead of
disposing of waste.
The unit, accessories,
packaging & used
batteries should be
sorted for environmentally friendly
recycling in accordance with the
latest regulations.
MAINTENANCE AND SERVICE

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LIMITED WARRANTY
Dave White’s SitePro (“Seller”) warrants to the original purchaser only, that
all David White laser tools and optical instruments will be free from defects in
material or workmanship for a period of two (2) years from date of purchase.
SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under
this Limited Warranty and, to the extent permitted by law, any warranty or
condition implied by law, shall be the repair or replacement of parts, without
charge, which are defective in material or workmanship and which have not
been misused, carelessly handled, or misrepaired by persons other than
Seller or Authorized Service Center. To make a claim under this Limited
Warranty, you must return the complete laser, optical instrument or David
White product, transportation prepaid, to SITEPRO Service Department or
Authorized Service Center. Please include a dated proof of purchase with your
tool. For locations of nearby service centers, please call 1-855-354-9881.
THIS LIMITED WARRANTY DOES NOT APPLY TO ACCESSORY ITEMS
SUCH AS TRIPODS, RODS, HAND LEVELS, FIELD SUPPLIES, TAPES,
MOUNTING DEVICES AND OTHER RELATED ITEMS. THESE ITEMS
RECEIVE A 90 DAY LIMITED WARRANTY.
To make a claim under this Limited Warranty, you must return the complete
product, transportation prepaid. For details to make a claim under this
Limited Warranty please visit www.davidwhite.com or call 1-855-354-9881.
ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO ONE
YEAR FROM DATE OF PURCHASE. SOME STATES IN THE U.S., AND
SOME CANADIAN PROVINCES DO NOT ALLOW LIMITATIONS ON HOW
LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY
NOT APPLY TO YOU.
IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING BUT NOT LIMITED TO
LIABILITY FOR LOSS OF PROFITS) ARISING FROM THE SALE OR USE
OF THIS PRODUCT. SOME STATES IN THE U.S., AND SOME CANADIAN

-19-
PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE
LIMITATION MAY NOT APPLY TO YOU.
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND
YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE
TO STATE IN THE U.S., OR PROVINCE TO PROVINCE IN CANADA AND
FROM COUNTRY TO COUNTRY.
THIS LIMITED WARRANTY APPLIES ONLY TO PRODUCTS SOLD WITHIN
THE UNITED STATES OF AMERICA, CANADA AND THE COMMONWEALTH
OF PUERTO RICO. FOR WARRANTY COVERAGE WITHIN OTHER
COUNTRIES, CONTACT YOUR LOCAL SITEPRO DEALER OR IMPORTER.
David White is a registered trademark and offered exclusively by SitePro.

42348D3900 09/15 Printed in China
© Dave White’s SitePro 7619 S 1150 E Otterbein, IN 47970
Tel. [phone]