Delta CS-LDM-50M User manual

User Manual

Page 1
Interface
Item
Description
1
Laser receiving lens
2
Laser emission port
3
LCD display
4
Main button
5
Shut down button

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6
Function button
7
Lanyard hole
8
Charging port
Operating instructions
1. Do not look directly at the red laser
light emitted from the laser emitting
port with your eyes. Looking directly
at it will cause damage to your eyes.
2. Do not cover the receiving lens and
laser emitting port of the rangefinder
when measuring the distance, and
place the rangefinder on a fixed baffle
or bracket plane as much as possible.
3. During measurement, the
rangefinder cannot be moved before
the measurement result is displayed
on the software interface.
4. The better the laser's throwback
(scattering, non-reflection) effect on
the target surface, the farther its range.
When the laser spot falls on the
surface of the following objects, the
measurement will be inaccurate：
-- Transparent surfaces (water, glass).
-- Surfaces that reflect surfaces

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(polished metals)
-- Porous surfaces (e.g. soundproof
materials)
-- Textured surfaces (e.g. rough
plaster walls, natural stone).If
necessary, reflective target paper (e.g.
white paper) can be placed on top of
these objects
5. Front/Rear reference
Front/Rear reference: means whether
the body length is counted in the
measurement data of both ways.
Front datum: Without fuselage
length. Rear reference: Include
fuselage length
Front benchmark display shows by
Rear reference display shows by

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Basic operation
① On/Off
a. Press the b. Press the
main button 0.5 shut down button
seconds to turn 2 seconds to
on. shut down.
②Switching front/rear reference
In the power-on state, press the
function button for about 1 second to
switch the reference.
Note: The selection of
the reference should
be before the start of
the measurement or
after the end of a
single measurement.
Do not switch the
reference during the
measurement process.

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③Switch numerical unit
In the shutdown state,
press the main button
and turn it on and
keep the keys on,
wait for about 2
seconds after turning
on the device to enter
the measurement
numerical unit
switching state.
The unit can be
switched between m
(meter)/ft (feet)/in
(inch) in turn.
④Other operations
a. Return operation
Press the shut down
button for about 0.5
seconds to return to the
previous level of
data or mode.
b. LCD backlight control
Long press the switch
button for about 1 second
to turn off/on the LCD
backlight.

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⑤ Simple measurement
a. Single measurement
When power on, press
the main button for
about 0.5 seconds and
turn on the red
measurement laser.
Short press again to
start the measurement
and display the data.
If no operation, the
meter will be
automatically turned
off after 20 seconds
and automatically
turned off after 60
seconds.
b. Consecutive measurement
Long press the main button for
about 1 second to enter the
consecutive measurement mode. In
the process of moving the meter to
a new position, the real-time
distance measurement data will be
displayed on the screen.
Under consecutive mode, the

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meter will automatically display
the maximum and minimum value
of the measured data.
Advanced function Operation
Switch function mode:
When power on, short
press the function
button for about 0.5
seconds to switch the
function mode, and
press once to switch
one function mode.
① Area measurement
In this mode, the area can
be measured and
automatically calculated.
Short press the main button to
measure the data (1), and then
short press the measured data (2).
The meter will automatically work
out the volume based on these 2

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measurements and display it on
the primary display area.
Data⑴[Length]
Data⑵[Width]
Automatic
measurement
of area data
Area measurement symbol:
② Volume measurement
In this mode, the area can be
measured and automatically
calculated.
Short press the main button to
measure data (1), short press again
to measure data (2), and short
press again to measure data (3).
The meter will automatically work
out the volume based on these 3
measurements and display it on
the primary display area.

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Data⑴[Length]
Data⑵[Width]
Data⑶[Height]
Automatic
measurement of
volume data
Volume measurement symbol：
③ Primary Pythagorean
In this mode, the system uses the
Pythagorean law a2+b2=c2，The third
side measurement data is
automatically measured by the two
side measurement data.
This mode can calculate the length of
the target edge only by running the
Pythagorean law once, which is also
called Primary Pythagorean mode.
Short press the main button to

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measure data c, and press again to
measure data b. After measuring the
two data, the meter automatically
calculates the length of data a.
Data c[Length]
Data b[Length]
Data a
automatically
measured
Primary Pythagorean symbol:
The position of laser distance
meter is shown as below.

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④Secondary Pythagorean (data
addition)
This device can measure height in
two segments by taking three
measurements. Press the operation
key the get the data c, data b and data
e, the laser automatically calculates
the length of data (a1+a2).
Data/length c
Data/length b
Data/length e
Data (a1+a2)
automaticall
y measured
Secondary Pythagorean symbol (data
addition):
The position of
laser distance
meter is shown
as on the left.

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⑤Secondary Pythagorean (data
subtraction)
This device can measure height in
two segments by taking three
measurements. Click the operation
key the get the data b, data c and
data e, the laser automatically
calculates the length of data a.
Data/length e
Data/length c
Data/length b
Data a
automaticall
y measured
Secondary Pythagorean (data
subtraction):
The position of
laser distance
meter is shown
as on the left.

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⑥ One-key angle height
measurement
In this mode, the system uses the
built-in angle sensor and uses the
Pythagorean law to measure, short
press the key to measure the length D,
the angle θ, shortest distance a and
object height b can be measured
by one key.
Data/length a
Data/length b
Angle θ
Data/length D
Primary Pythagorean and Angle
measurement symbol：
The position of
laser distance
meter is shown as
on the left.

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Screen display Interface
Safety information
1. Please don’t look into the beam
directly. The laser project a class 2
laser (635nm, <1mW) that meets IEC
60825-1standar.
2. Please place it in the area out of
the reach of children.
3. Don’t use this instrument in a
flammable or explosive
environment
4. Don’t use this instrument near

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medical equipment or on the air
5. The meter parts mush keep clean
at any time, Please turn it off
before clean it. When there is dust
on the laser emitting port and the
receiving lens, use a soft cloth with
cleaning water or a neutral screen
cleaner, then wipe it. Do not use
acid or alkaline detergents for
cleaning; as well, do not use
alcohol or other solvents for
cleaning.
6. The meter is not waterproof, and
it cannot be wetted or placed in
water.
7. Do not repair this instrument
without permission. If the
instrument is damaged, please
contact your supplier.
8. Please dispose of disused
instruments in accordance with the
laws of your location.

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Problems and Solutions
Fault type
Possible causes and
solutions.
Unable to
turn on
1. No battery power,
charge and then try to
turn on.
2. Long press the switch
time is not enough,
please confirm press for
one second.
No
display
1. Turn off the
backlight, short press
shut down button for
about 1 second to turn
on/ off the backlight.
2. The display is
damaged, please contact
the supplier to solve.
Unable to
charge
1. The charging cable is
damaged, replace the
charging cable to try to
solve.
2. The charging module
is damaged, please
contact the supplier to
solve.
Large
1. Add white reflector

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error
for harsh environment.
2. Fix calibration
accuracy in setting page.
3. The ambient
temperature is too
low/high, please warm
up/cool down the
equipment.
No data
1. Laser receiving /
emission port
defacement, clean
treatment.
2. The meter shake too
much, please rest.
Specification
Item
Laser
distance
meter
Measuring
range (general
conditions*)
0.03--30/40/50m
(according to
the actual
selected
equipment）
Measuring
accuracy
±2mm

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Measuring range
(unfavorable
conditions*)
0.03-20/30/40
M (according
to the actual
selected
equipment）
Measuring
accuracy
(unfavorable
conditions)
±3mm
Display
Unit
Minimum
1mm
Laser type
620~670nm,
Class2 ,<1mw
Battery life
250mAh
5000
measurements
(approx.)
Charging
DC 5V<1A
Operation
Temperatur
e
0°-40°C
Storage
Temperatur
e
-20-60℃
Relative air
humidity
80%

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General conditions*
Refers to the strong reflection
ability of the laser irradiation area
(such as painting a white wall),
the background lighting is dark
and the working temperature is
15-35℃.under this conditions, an
error ± 0.05 mm/m should be
considered.
Unfavorable conditions*
Refers to the weak reflection
ability of the laser irradiation area
(such as black cardboard polished
tiles), strong background lighting
and working temperature is <0℃
or >45℃. Under this conditions,
an error ± 0.15 mm/m should be
considered.
Measuring range *
When measurement under the
laboratory environment (5 meters
distance, 300LX brightness), the
times of the measurement, there
will be deviation about ±500.