Unit LM50A User manual

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P/N:110401110183X
LM50A/LM70A/LM100A/LM120A
Laser Distance Meter
User Manual
Safety Information
Before using the meter for the first time, please read the safety information
and operating instructions carefully.
Use the meter only as specified in this manual. Otherwise, it may cause
damage to the meter, affect measurement accuracy and result in personal
injury.
Do not disassemble or repair the meter without authorization. Do not refit
or change the performance of the laser transmitter illegally. Please keep
the meter properly, do not place it where children can reach it, and avoid
use by irrelevant personnel.
Do not irradiate the laser at eyes and other parts of the body , and on the
surface of highly reflective objects.
The electromagnetic radiation of the meter may cause interference to other
equipment. Please do not use the meter near airplanes, medical equipment
or in flammable and explosive environments.
The replaced batteries and discarded meters cannot be disposed of together
with domestic garbage. Please dispose of them in accordance with
relevant national or local laws and regulations.
If the meter has any quality problems, or if users have any questions about
the use of the meter, please contact the local dealer or manufacturer in time.
Battery status
Data storage
Laser indication
Max
Length measurement
Area/volume/triangle
measurement
Min
Secondary display
Primary display
Product Introduction
Display
Keypad
On/measure
Subtract/sound
Add
Area/volume/triangle
Measurement reference/
unit selection
Off/clear
Log
1. Open the battery door on the back of the meter, install the battery according
to the polarity instructions, and close the battery door.
2. The meter can only use 1.5V AAA alkaline batteries.
3. When the meter is not used for a long time, please take out the battery to
prevent it from corroding the meter's main body.
Batteries
Power On and Function Settings
1. Power On/Off
In the shutdown state, press , the meter and the laser will be started
at the same time.
In the power-on state, press and hold for 3 seconds to turn off the
meter. If no operation is performed within 150 seconds, the meter will
automatically shut down.
2. Unit Settings
Long press to enter the unit setting state and the current unit can be
reset. The default unit of the meter is 0.000m. There are 6 optional units.
Measurement units:
Length Area Volume
3. Measurement Reference Settings
Short press to measure from front or end. The default setting is end
measurement.
4. Backlight
The backlight is automatically turned on and off. It will turn on for 15 seconds
when any button is pressed. The backlight will automatically turn off if there
is no operation after 15 seconds to save power.
5. Sound
Long press to turn on or off the sound of the beeper.
6. Self-Calibration
Self-calibration function can ensure the measurement accuracy.
Calibration method: In the shutdown state, press and hold , and then
short press to turn on the meter. When the screen shows ' ' with a
flashing number at the bottom, the meter enters the self-calibration mode.
At this time, users can press to calibrate values according to the error
of the meter.
Calibration range: -9~9mm
Examples: The actual distance is 3.780m.
If the measured value is 3.778m, which is 2mm smaller than the actual value,
press + to increase the calibration value by 2mm.
If the measured value is 3.783m, which is 3mm larger than the actual value,
press to lower the calibration value by 3mm.
After adjustment, press to save the calibration results.
Measurement Modes
1. Single Measurement
While the meter is on, press to transmit the laser. Press again to make
the distance measurement. The measurement results will show on the
primary display.
2. Continuous Measurement
While the meter is on, long press to enter the continuous measurement
state. The maximum and minimum values during the measurement will show
on the secondary display. The measurement results will show on the primary
display. Short press or to exit the continuous measurement.
3. Area Measurement
Press FUNC 1x. The symbol will appear on the display and one side of
the rectangle will flash.
Press to make the first measurement (length).
Press again to make the second measurement (width).
The meter will automatically calculate the area, and the result will show on
the primary display. The length and width will show on the secondary display.
During the measurement process, press to clear the measurement result
and re-measure.
Press to exit the area measurement and enter the length measurement
mode.
4. Volume Measurement
Press FUNC 2x. The symbol will appear on the display.
Press to make the first measurement (length).
Press again to make the second measurement (width).
Press again to make the third measurement (height).
The meter will automatically calculate the volume, and the result will show
on the primary display. The length, width and height will show on the secondary
display.
During the measurement process, press to clear the measurement result
and re-measure.
Press to exit the volume measurement and enter the length measurement
mode.
5. Indirect Measurement
The meter has four modes that use the Pythagorean theorem to measure
the distance of one side of a triangle, which is convenient for users to perform
indirect measurement in a complex environment.

Err5
Err4
Err3
Err2
Err1
Err
112x50x25mm
50m 70m 100m 120m
-20˚C~60˚C
0˚C~40˚C
20%~80%RH
1.5V 2xAAA
1
2
3
4
5
±(2mm+5*10 D)
-5
LM50A LM70A LM100A LM120A
Class II
(
height
Press FUNC 3x.
Press to measure the length of the hypotenuse (a).
Press to measure the length of the base-side (b).
The meter will automatically calculate the length of the leg (x).
1) Measure the hypotenuse and base-side, indirectly measure the
(2) Measure the leg and base-side, indirectly measure the hypotenuse
Press FUNC 4x.
Press to measure the length of the leg (a).
Press to measure the length of the base-side (b).
The meter will automatically calculate the length of the hypotenuse (x).
(3) Press FUNC 5x, the hypotenuse flashes
Press to measure the length of the hypotenuse (a).
Press to measure the length of another hypotenuse (b).
Press to measure the length of the base-side ©.
The meter will automatically calculate the length of the leg (x).
(4) Press FUNC 6x, the hypotenuse flashes
Press to measure the length of the hypotenuse (a).
Press to measure the length of the base-side (b).
Press to measure the length of another hypotenuse ©.
The meter will automatically calculate the length of the leg (x).
In the Pythagorean measurement mode, the length of the leg must be
less than the length of the hypotenuse; otherwise the meter will display
an error signal prompt. In order to ensure the measurement accuracy,
users should make sure to measure from the same starting point and in
the order of hypotenuse and leg.
6. Addition/Subtraction
The single distance measurement values can be added or subtracted. After
getting the result when taking a single distance measurement, press to
enter the addition/subtraction mode.
Short press +, the "+" symbol will show on the primary display, and then it
will enter the addition mode. The addition value of the last and the current
measurement values will show on the display.
Short press , the "﹣" symbol will show on the primary display, and then
it will enter the subtraction mode. The subtraction value of the last and the
current measurement values will show on the display.
Not only the distance can be added and subtracted, but also the area and
the volume.
Area addition: Measure the first area and get the result, as shown in Figure 1
below. Then press to measure the second area and get the result, as
shown in Figure 2 below, and a plus sign will be displayed in the lower left
corner. Finally, press to get the result of adding these two areas, as shown
in Figure 3. The addition and subtraction of volume is similar to it.
7. Data Storage
If the current data is valid when measuring, press and hold for 3 seconds,
and the data will be automatically stored in the meter memory. In the area,
volume and indirect measurement modes, the data can also be stored after
all the tests are over. At this time, the meter will store the complete
measurement record under this mode.
8. View/Delete Data
Short press to query the stored data. Press + to scroll forwards, and press
to scroll backwards. When viewing data, short press to delete the
current record, and long press to delete all records. Press or to exit.
Error Codes
Resolution
Use the meter in
designated environments.
Measure the target point with
strong reflection ability.
Measure the target point
with weak reflection ability.
Replace batteries.
Use the meter within the range.
Re-measure to ensure that the
hypotenuse is longer than the leg.
Cause
Out of distance
measurement range
Signal too weak
Signal too strong
Battery power too low
Out of operating
temperature range
Pythagorean
measurement error
Code
Specifications
Items
Measurement range
Measurement accuracy
Continuous measurement
Area/volume measurement
Pythagorean measurement
Addition/subtraction
Area/volume
addition/subtraction
Max/min
Self-calibration
Laser class
Laser type
Data storage
Auto laser off
Auto power off
Battery life
Sound prompt
Storage temperature
Operating temperature
Storage humidity
Batteries
Product size
Class 2 630-670nm, ＜1mW
99 groups
20s (single measurement)
About 150s
Up to 8000 measurements
* d" means actual distance."
** Under harsh environments, such as excessive sunlight and ambient
temperature fluctuations, weak reflection on reflective surfaces, and
insufficient battery power, the measurement results will have errors. At this
time, using the target reflector can improve the measurement accuracy.
Maintenance
Do not place the meter in a high temperature and humidity environment for
a long time. When not using the meter for a long time, please take out the
battery and put the meter in the carrying bag, and store it in a cool and dry
place.
Remove dirt with a moist, soft cloth. Do not use aggressive detergents or
solutions. The laser window and focusing lens can be wiped according to the
method of wiping the optical device.
Packing List
All accessories are shown in the table below.
Accessories
Meter
Carrying bag
AAA batteries
User manual
Gift box
Quantity
1
1
2
1
1
Items
Figure 1 Figure 2 Figure 3

展开尺寸:280*190mm
单色印刷
LM50A
修改页码
0
60g书纸
折后：95*56mm
110401110183X
无
无