UNI-T LM50A User Manual

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.
Product Introduction
Display
Battery status
Data storage
Laser indication
Max
Length measurement
Area/volume/triangle
measurement
Min
Secondary display
Primary display
Keypad
On/measure
Subtract/sound
Add
Area/volume/triangle
Measurement reference/
unit selection
Off/clear
Log
Batteries
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.
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
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:
3. Measurement Reference Settings
Short press
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
6. Self-Calibration
Self-calibration function can ensure the measurement accuracy.
Calibration method: In the shutdown state, press and hold
short press
flashing number at the bottom, the meter enters the self-calibration mode.
At this time, users can press
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
After adjustment, press
Measurement Modes
1. Single Measurement
While the meter is on, press
the distance measurement. The measurement results will show on the
primary display.
2. Continuous Measurement
While the meter is on, long press
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
3. Area Measurement
Press FUNC 1x. The
the rectangle will flash.
Press
Press
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
and re-measure.
Press
mode.
4. Volume Measurement
Press FUNC 2x. The
Press
Press
Press
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
and re-measure.
Press
mode.
5. Indirect Measurement
for 3 seconds to turn off the
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.
Length Area
2
1 0.000 m 0.000 m
2
2 0.00 m 0.00 m
2
3 0.0 in 0.00 ft
2
4 0 1/16 in 0.00 ft
2
0'00" 1/16
5 0.00 ft
2
6 0.00 ft 0.00 ft
to measure from front or end. The default setting is end
to turn on or off the sound of the beeper.
to turn on the meter. When the screen shows '
to calibrate values according to the error
to lower the calibration value by 3mm.
to save the calibration results.
to transmit the laser . Press
to enter the continuous measurement
or to exit the continuous measurement.
symbol will appear on the display and one side of
to make the first measurement (length).
again to make the second measurement (width).
to exit the area measurement and enter the length measurement
symbol will appear on the display.
to make the first measurement (length).
again to make the second measurement (width).
again to make the third measurement (height).
to exit the volume measurement and enter the length measurement
Volume
3
0.000 m
3
0.00 m
3
0.00 ft
3
0.00 ft
3
0.00 ft
3
0.00 ft
, and then
' with a
again to make
to clear the measurement result
to clear the measurement result