Lasertec LDM120 User manual

LDM120
120MLASER DISTANCE MEASURER
INSTRUCTION MANUAL

2
Read the following safety instructions before attempting to operate
this product.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE
REFERENCE.
WARNING: Read and
understand all instructions.
▪Use the laser measurer only
with the specied batteries.
▪Store the laser measurer out
of reach of children and other
untrained persons. Lasers are
dangerous in the hands of
untrained users.
▪Due to the electromagnetic
radiation interference to other
equipment and devices please
do not use the laser distance
measurer in an airplane or around
medical equipment.
▪ Do not use in a ammable,
explosive environment.
▪Discarded batteries or devices
shall not be processed with
household garbage. Please follow
related laws and regulations.
▪Tool service must be performed
only by qualied repair personnel.
Repairs, service or maintenance
performed by unqualied
personnel will void the warranty.
Only approved and authorised
service technicians can carry out
warranty repairs.
▪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.
▪Do not use optical tools to view
the laser beam.
▪Do not remove or deface
warning labels.
WARNING: DO NOT
DISASSEMBLE THE LASER
MEASURER. There are no
user serviceable parts inside.
Disassembling the laser will void
all warranties on the product.
Do not modify the product in
any way. Modifying the tool
may result in hazardous laser
radiation exposure.
CAUTION: Class 2 Laser
Product
▪ Never look into the laser beam
directly and intentionally.
▪Do not use optical tools to view
the laser beam.
▪Do not let children come in
contact with the laser measurer.
SAFETY
!
!
!

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Lasertec LDM120 Carry pouch
Carry strap USB cable Rechargeable
batteries
Please ensure the following items are included with your laser
distance measurer. If anything is missing please contact your
retailer.
ITEM CHECKLIST

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LCD screen
Laser emitter
Control panel
USB connection port
PRODUCT OVERVIEW
LASER MEASURER FRONT

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Battery compartment
Wrist strap attachment
End piece
1/4" thread for
operation on a tripod
LASER MEASURER BACK
LASER MEASURER BOTTOM
Unfold the end piece to access the battery compartment.
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End piece

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Read (laser emission on)
Menu / equal
Power off / clear
Digital bubble vial /
staking out
Subtraction / scroll down
Addition / scroll up
Data storage
Camera
Benchmark / timer
Multi-function
CONTROL PANEL

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Laser emission on
Reference point
Tilt angle
Measuring mode
Measuring mode
Measurement display
Backlight time
Measurement timer
Auto power off time
Volume on / off
Distance unit
Angle unit (° or %)
Main measurement display
Unit
Battery level
45.9°
DISPLAY SCREEN

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▪The instrument is supplied with three 1.2v AAA Ni-Mh rechargeable
batteries. To replace batteries, unfold the endpiece and remove the
battery door at the back of the device. Place batteries according to
polarity and replace battery door.
▪The batteries can be charged via the USB cable. Place the micro
USB end into the USB connection port. Insert the other end into a
USB charging device.
The USB port is for charging the batteries only and does not
act as a data connection to devices such as computers.
▪The battery level icon will flash while the battery is charging. The
battery level icon will appear solid green when the battery is fully
charged.
▪ For infrequent use, please take out the battery to avoid corrosion
to the body of the device.
On/off
a) Press and hold the read button to turn the laser distance measurer
on.
b) Press and hold the o / clear button for 3 seconds to turn the unit
o. The device will shut o automatically after 150 seconds without
use. (See page 19 to adjust the automatic shut o timer.
WARNING: Do not charge alkaline batteries. Charging
alkaline batteries may cause damage to the device, and may
leak, explode or cause re!
USING YOUR LASER MEASURER
POWER SUPPLY
OPERATION
!
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Reference point setting
To cycle between the benchmark reference points press the
benchmark / timer button. There are four reference points: top,
middle, bottom and end piece.
Unit setting
a) The unit default setting is 0.000m. To reset the current unit of
measurement press the menu / equal button.
b) Press the subtraction / scroll down button to scroll down to the
distance unit setting.
c) Press the menu / equal button to adjust the units. Press the
addition / scroll up button or the subtraction / scroll down button to
scroll through the unit options.
d) Press the menu / equal button to select the unit.
e) Press the o / clear button to return to the measurement screen.
OPTIONAL UNITS
Length Area Volume
0.000m 0.000m20.000m3
0.00m 0.00m20.00m3
0.0in0 0.00ft20.00ft3
0.00ft0 0.00ft20.00ft3
0 1/16 in 0.00ft20.00ft3
0'00' 1/16" 0.00ft20.00ft3
0.000 (metre) 0.000 2(metre) 0.000 3(metre)
0.00 (metre) 0.00 2(metre) 0.00 3(metre)
USING YOUR LASER MEASURER

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Single measurement
a) Press the read button. The laser will be emitted.
b) Re-press the read button for a single distance measurement.
Results will be displayed on the main measurement display.
c) The previous three measurements will also be displayed above the
main measurement display.
Continuous measurement
a) Press and hold the read button. Minimum and maximum results
will be displayed on the display screen.
b) Press the read button or o / clear button to exit continuous
measurement.
MEASUREMENT

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Area measurement
a) Press the multi-function button. Two rectangles will appear on the
display screen.
b) Press the read button to measure the first edge (width).
c) Press the read button to measure the second edge (length).
d) Area will be calculated automatically with results shown on the
display screen.
e) Press the o / clear button to clear measurement.
Volume measurement
a) Press the multi-function button twice. Three rectangles will appear
on the display screen.
b) Press the read button to measure the first edge (height).
c) Press the read button to measure the second edge (length).
d) Press the read button to measure the third edge (width).
e) Volume will be calculated automatically with results shown on the
display screen.
f) Press the o / clear button to clear measurement.

12
a
1. Calculate two sides of a right angle triangle
Press the multi-function button three times to enter pythagorean
mode. Follow the instructions displayed on the screen as follows:
a) Press the read button to measure the length (a) of the hypotenuse
and tilt angle.
b) Length (x) will be calculated automatically with results shown on
the display screen.
X
X
Pythagoras measurement
To calculate the unilateral distance of a triangle pythagorean mode
can be used. When taking measurements of the triangle, ensure the
length of the right side is shorter than the length of the hypotenuse. If
not, the instrument will display an error signal.
To ensure the accuracy of measurement, take measurements from
the same starting point of the first order hypotenuse. Then follow
with the measurement of the right side. Please follow the instructions
according to the method required. (See diagrams on pg 12-15 to
determine the appropriate method).

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3. Calculate the hypotenuse of a right angle triangle
Press the multi-function button five times to enter pythagorean mode.
Follow the instructions displayed on the screen as follows:
a) Press the read button to measure the length (a) of the rectangular
side.
b) Press the read button to measure the length (b) of the next
rectangular side.
c) Length (x) of the hypotenuse will be calculated automatically with
results shown on the display screen.
2. Calculate the side of a right angle triangle
Press the multi-function button four times to enter pythagorean
mode.
Follow the instructions displayed on the screen as follows:
a) Press the read button to measure the length (a) of the hypotenuse.
b) Press the read button to measure the length (b) of the rectangular
side.
c) Length (x) will be calculated automatically with results shown on
the display screen.
a
b
X
X
XX
ab

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5. Calculate partial length of a right angle triangle
Press the multi-function button seven times to enter pythagorean
mode. Follow the instructions displayed on the screen as follows:
a) Press the read button to measure the length (a) of the hypotenuse.
b) Press the read button to measure the length (b) of the second
hypotenuse.
c) Press the read button to measure the length (c) of the rectangular
side.
d) Length (x) of the vertical side will be calculated automatically with
results shown on the display screen.
4. Calculate the third side of a triangle
Press the multi-function button six times to enter pythagorean mode.
Follow the instructions displayed on the screen as follows:
a) Press the read button to measure the length (a).
b) Press the read button to measure the length (b).
c) Press the read button to measure the length (c).
d) Length (x) of the vertical side will be calculated automatically with
results shown on the display screen.
abc
X
XX

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OTHER FUNCTIONS
Delayed measurement (timer)
a) Press and hold the benchmark / timer button.
b) Press the addition / scroll up button or the subtraction / scroll
down button to adjust the time in seconds. (Minimum 5 seconds,
maximum 60 seconds).
c) Once the time has been set, press the read button.
6. Calculate the area of an irregular triangle
Press the multi-function button eight times to enter pythagorean
mode.
Follow the instructions displayed on the screen as follows:
a) Press the read button to measure the length (a).
b) Press the read button to measure the length (b).
c) Press the read button to measure the length (c).
d) Area (x) will be calculated automatically with results shown on the
display screen.
c
b
a
XXX

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Adding and subtracting single measurement
Addition
a) Take the first reading by pressing the read button.
b) Press the addition / scroll up button. A “+” symbol will appear on
the display screen.
c) Take the second reading by pressing the read button. The values
will be added automatically with the results shown on the display
screen.
Subtraction
a) Take the first reading by pressing the read button.
b) Press the subtraction / scroll down button. A “-” symbol will appear
on the display screen.
c) Take the second reading by pressing the read button. The values
will be subtracted automatically with the results shown on the display
screen.
d) Press o / clear button to exit addition or subtraction mode.
To clear the previous measurement, press the o / clear
button.
Adding and subtracting area measurement
a) Take the area measurement as described in the Area Measurement
section (pg 11) .
b) Press the addition / scroll up button or the subtraction / scroll
down button. A “+” or “-” symbol will appear on the display screen.
c) Take the second area measurement as described in the Area
Measurement section (pg 11) .
d) Press the menu / equal button. The values will be calculated
automatically with the results shown on the display screen.
e) Repeat step two and three to add or subtract more area
measurements.
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Adding and subtracting volume measurement
a) Take the volume measurement as described in the Volume
Measurement section (pg 11) .
b) Press the addition / scroll up button or the subtraction / scroll
down button.
A “+” or “-” symbol will appear on the display screen.
c) Take the second volume measurement as described in the Volume
Measurement section (pg 11) .
d) Press the menu / equal button. The values will be calculated
automatically with the results shown on the display screen.
e) Repeat step two and three to add or subtract more volume
measurements.
Staking-out function
The staking-out function allows the user to enter a value into the
unit. The unit setting will then guide the user into nding the exact
reference point.
a) Press and hold the staking out / digital bubble vial button to enter
staking-out mode.
b) Press the addition / scroll up button or the subtraction / scroll
down button to adjust the setting of a. Press the read button to
confirm the unit setting.
c) Press the addition / scroll up button or the subtraction / scroll
down button to adjust the setting of b. Press the read button to
confirm the unit setting.
d) The unit will display an arrow pointing forwards or backwards,
depending on the location of the user. Move forward or back until the
unit shows the centered symbol.
move back move forward centered

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Camera
The camera function assists with targeting the laser diode
in long range measurements and in bright sunlight.
Single measurement with camera
a) Press the camera button to view the target area through
the camera.
b) Target the desired area and press the read button. Press
the camera button to exit.
Multi-directional electronic bubble vial
a) Press and hold the staking out / digital bubble vial
button.
b) Press the off / clear button to exit.
Horizontal angle axis
Vertical angle axis

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Area / volume /pythagoras measurement with
camera
a) The camera can also be used during area, volume or
pythagoras measurement. Press the multi-function button
to enter the desired measurement mode.
b) Press the camera button to view the target area through
the camera.
c) Target the desired area and press the read button. Press
the camera button to return. Repeat until all measurements
have been taken.
Storage and browsing
Save a reading
Press and hold the data storage button. The data will
automatically be stored in the memory of the unit.
View storage
To view stored measurements, press the data storage
button. Press the addition / scroll up button or the
subtraction / scroll down button to browse through the
data.
Remove records
To remove a record, press the power o / clear button.
To remove all stored data press and hold the power o /
clear button.

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Adjusting the calibration setting may aect the precision of
the device.
Menu Item Description Optional Settings
Backlight 5 seconds - 60 seconds
Laser active timer 20 seconds - 120 seconds
Auto power o 100 seconds - 300 seconds
Sound On / O
Unit setting Metres / feet / inches
Angle unit Degree (°) / slope (%)
Calibration -0.009m to +0.009m
Bluetooth On / O
MENU OPTIONS
Navigating the menu
a) Press the menu / equal button to enter the menu.
b) Press the addition / scroll up button or the subtraction / scroll
down button to scroll through the menu settings.
c) Press the menu / equal button to adjust the setting. Press the
addition / scroll up button or the subtraction / scroll down button to
scroll through the options.
d) Press the menu / equal button or the data storage button to select
and save the setting.
e) Press the o / clear button to return to the measurement screen.
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