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Laser Rangefinder
Instruction Manual
17
Description of Display and Key Panel
Battery power indicator
Storage query indicator
Distance measurement function indicator
Data storage quantity indicator
Laser power indicator
Signal strength indicator
Measurement reference indicator
Pythagorean measurement
function indicator
Unit indicator
Stakeout function indicator
Area/volume measurement
Auxiliary display area
function indicator
Main display area
On/measuring key
Add button
Decrease button
Backlight/unit key
Area / Volume
Stakeout
Pythagorean Indirect Measurement Key
measurement keymen
Storage / configuration function
key
Reference conversion
Off / delete key
key
Powering Up the Instrument and Setting the Menu
Switching On and Off
In the off state, press and hold the "on/measure" key to turn the instrument on and
enter standby mode.
In the on state, press and hold the "off / delete" key to turn off the instrument.
In the power-on state, if no operation is performed for 45 seconds, the instrument
automatically turns off.
Setting the Unit
Press the "backlight / unit" key to convert the unit. The convertible length units are m
(meter), ft(foot), in (inch); The convertible area units are m2 (square meter), ft2
(square foot) in2 (square inch); The convertible volume units are m3
(cubic metres), ft3 (cubic feet), in3 (cubic inches).
Reference Configuration
Short press the "reference conversion" key to select the measurement reference.
The system provides two reference points: the front-end reference point and the
back-end reference point: The default reference point is the back-end reference point
at start-up.
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Hand-held Laser Rangefinder Instruction Manual
Thank you for purchasing the handheld laser rangefinder from our company. Before using the
instrument for the first time, please read the terms and instructions carefully and comply with
the following safety terms instructions in full and comply with the following safety terms:
Before using the instrument, carefully read all terms and operating instructions in this manual.
Failure to follow the operating instructions in the manual may cause damage to the instrument,
affect measurement accuracy and result in personal injury to the user or a third party.
Do not attempt to open or repair the instrument in any way yourself. It is strictly forbidden to
modify or change the operation of the laser transmitter of the instrument. Store the instrument
properly and keep it out of the reach of children.
It is strictly forbidden to irradiate the laser on the surface of highly reflective objects.
Electromagnetic radiation from the instrument may interfere with other equipment and devices.
Do not use this instrument near aircraft or medical equipment and do not use the instrument in flammable
and explosive environments.
Used instrument batteries and discarded instruments should not be disposed of with household waste.
Dispose of used batteries and discarded instruments in accordance with national or local laws and
regulations.
Do not repair the instrument without authorisation. If there are any problems with the quality of the
instrument, or if you have any questions about the use of the instrument, please contact your local
distributor or our company in time. We will solve it for you as soon as possible.
Battery Installation and Replacement
Open the battery cover on the back of the instrument, insert the batteries correctly according to the
battery polarity instructions and close the cover.
Use 2 x 1.5V AAA alkaline batteries for the instrument. (As for the rechargeable model, only 1.2V AAA
NIMH rechargeable batteries can be charged.)
When the instrument is not used for a long time, remove the batteries to prevent corrosion of the
instrument host.
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Powering Up the Instrument and Setting the Menu
Backlight on and off
When the backlight is off, press and hold the "on/measure" key to turn on the backlight and
perform a single measurement.
When the backlight is on, if no operation is performed for 15 seconds, the display backlight turns off
automatically.
Data deletion function
Briefly press the "off / delete" key for the delete function (cancel the last command and return to the
previous step, delete the measurement result).
Historical record enquiry
Signal strength indicator
Press the "storage / configuration functions" key and the display shows "storage query indicator", which
means to enter the history log query function. By pressing the + and - key, you can query the last 20 sets of
automatically stored data.
Battery Power Indicator
Displayed on the screen is the battery power indicator. When the indicator shows an empty battery it
means that the battery is low and needs to be replaced.
Signal strength indicator
shown on the display is the indicator of the measured reflected signal strength. When the number of
segments displayed is reduced, it indicates that the measured reflected signal strength is relatively
low..
Self-calibration
In order to ensure the accuracy of the instrument, self-calibration function is provided. Calibration method:
Press and hold the "on/measure" key in the off state until the "boot:" symbol appears on the display and
press and hold the "on/measure" key again until "CAL.0" appears. Now, the number on the back of "CAL"
flashes, indicating that the auto-calibration mode has been entered. Now, the user can press the "on/
measure" key to adjust the value according to the error of the instrument, and press the "off/clear" key to
confirm and exit the calibration mode after adjustment.
The adjustment error range is: -7 mm ~ 7 mm.
Measuring function
Distance measurement: single measurement
When the laser is switched off, briefly press the "on/measure" key to switch on the laser. At this moment,
the laser symbol flashes on the display.
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After the laser fixes the measurement point, press the "on/measure" key again to perform a single
distance measurement. And the measurement result data is displayed in the main display area.
Measuring function: continuous distance measurement
When the laser is switched on, press and hold the "on/measure" key for about 2 seconds to enter the continuous
measurement status. Now, the main measurement area shows the measurement result data in real time, and the
auxiliary display area shows the maximum and minimum measurement values in the measurement process. In the
continuous measurement state, briefly press the "on/measure" or "off/delete" key to exit the continuous
measurement mode.
Measurement of area
Briefly press the "Area / Volume" key and the display shows a rhomboid indicating entry into the area
measurement mode. Follow the instructions to complete the following operations: At this time, the long
side of the rectangle symbol flashes. After setting the measurement point, press "on/measure" to
measure the long side of the rectangle. Now the wide side of the rectangle symbol flashes, set the
measuring point again and press "on/measure" to measure the wide side of the rectangle.
The instrument automatically calculates the area, the result of the calculation is displayed in the main
display area and the measurement results of the length and width of the rectangle are displayed in the
auxiliary display area.
Press the "on/measure" key to delete the result of the last measurement and perform a new one.
Press the "off / delete" key to exit the area measurement.
Volume measurement
Briefly press the "area / volume" key and the display shows an empty cube on the screen indicating entry into volume
measurement mode. Follow the instructions to complete the following operations:
At this time, the long side of the cuboid symbol flashes. After setting the measuring point, press "on/measure" to measure
the long side of the cuboid. Now the width side of the cuboid symbol flashes, set the measuring point again and press "on /
measure" to measure the width side of the cuboid.
Now the height of the cuboid symbol flashes, set the measuring point again, press "on / measure" to measure the height of
the cuboid. The instrument automatically calculates the volume, the calculation result is displayed in the main display area
and the measurement results of the cuboid length, width and height are displayed in the auxiliary display area.
Press the "on/measurement" key to delete the result of the last measurement and perform a new one.
Press the "off / delete" key to exit the volume measurement.
Indirect measurement of the Pythagorean theorem
The instrument presets three modes to measure the one-sided triangle distance using the Pythagorean
theorem, which is convenient for users to measure indirectly in specific environments. Press the "Pythagorean
indirect measurement" key to select the indirect measurement mode of the Pythagorean theorem.
1) Press the "Pythagorean indirect measurement" key and the display shows a triangle and the hypotenuse "a"
flashes. After setting the measuring point, press "on/measure" to measure the hypotenuse of the triangle. The legs
flash. After setting the measuring point, press "on/measure" to measure the leg of the triangle. The instrument
automatically calculates the other leg "h", and the calculation result is displayed in the main display area and the
measurement results of "a" and "b" are displayed in the auxiliary display area. Press the "on/measure" key to delete
the result of the last measurement and make a new measurement.
2) Press the "Pythagorean indirect measurement" key twice, the display shows two triangles and the hypotenuse
"a" flashes. After setting the measuring point, press "on/measure" to measure the hypotenuse a of the triangle. The
legs flash. After setting the measuring point, press "on/measure" to measure the leg "b" of the triangle. The
hypotenuse "c" flashes. After setting the measuring point, press "on/measure" to measure the hypotenuse "c" of
the triangle. The instrument automatically calculates the other side "h", the result of the calculation is displayed in
the main display area and the measurement results of "a", "b" and "c" are displayed in the auxiliary display area.
Press the "on/measurement" key to delete the result of the last measurement and perform a new one.
3) Measure the hypotenuse "a", "b" and the cathetus "c" to calculate the value of "h" indirectly. Press the
"Pythagorean indirect measurement" key three times, the display shows two adjacent triangles and the hypotenuse
a flashes. After setting the measuring point, press "on/measure" to measure the hypotenuse "a" of the triangle. The
hypotenuse "b" flashes. After setting the measuring point, press "on/measure" to measure the hypotenuse "b". The
leg "c" flashes. After setting the measuring point, press "on/measure" to measure the cathetus "c". The instrument
automatically calculates "h", the calculation result is displayed in the main display area and the measurement results
of "a", "b" and "c" are displayed in the auxiliary display area. Press the "on/measurement" key to delete the result of
the last measurement and perform a new one.
Note: In Pythagorean measurement mode, the length of cathetus must be less than the length of hypotenuse for
the instrument to calculate; otherwise, the instrument displays error. In Pythagorean measurement mode, in order
to ensure measurement accuracy, make sure that the measurements start from the same starting point and the
measurement sequence is from hypotenuse to legs.
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Technical Parameters
Measurement accuracy
3mm
Measuring range
0.03 - 40 / 60 / 80 / 100 metres
Minimum display
1 mm
Single measurement time
0.1 - 4 seconds
Units of measurement
m (metre) /ft (foot) /in (inch)
Grade II
Grade II **
Laser class
Laser type
635mm
< 1mV
Laser power
Admitted
Continuous distance measurement
Admitted
Area measurement
Admitted
Volume measurement
Pythagorean measurement
Admitted
Admitted
Measurement of addition/subtraction of volume / area
Admitted
Maximum / minimum value measurement
Data storage
Maximum 20 groups
Change of measurement reference
Admitted
Display illumination
Admitted
Buzzer
Admitted
Battery type
2 x 1.5V AAA batteries
> 15000 measures
Battery life
IP54
Dust / water resistant
Operating temperature
0° C - 40° C
-20° C - 60° C
Storage temperature
Automatic laser shutdown
60 seconds
Automatic shutdown
480 seconds
Specification
118mm x 54mm x 27mm
** Under poor measurement conditions (such as too strong light, too large or too
small diffuse reflection coefficient of the measured spot), the measurement
accuracy will have a large error.
**In outdoor mode, the laser power increases. Use with caution in compliance with
local laws and regulations.
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Addition and subtraction measurement function
1) You can add/subtract single distance measurement through addition and subtraction operations: Press the "+" key, "+"
is displayed in the auxiliary display area of the screen (line 3), enter the cumulative sum mode, press "on/measurement",
the display shows the last measurement value, the current measurement value and the cumulative summed value of both.
The display shows the last measurement value, the current measurement value and the cumulative summed value of both.
The last measurement value and the current measurement value are displayed in the auxiliary display area, and the
cumulative sum value of both is displayed in the main display area. Press the "-" key and the auxiliary display area of the
screen (line 3) shows "-".
(line 3) shows "-", enter the cumulative subtraction mode, press the "on / measurement" key and the display shows the
last measurement value, the current measurement value and the cumulative subtracted value of both. The last
measurement value and the current measurement value are displayed in the auxiliary display area, and the cumulative
subtracted value of both is displayed in the main display area.
Cumulative addition / cumulative subtraction
2) Measure the first area value according to the area measurement method and the result is shown in the Figure.
1. Press the "+" key, the auxiliary display area of the screen (line 3) shows "+" as shown in Figure 2. And then
measure the second area value according to the area measurement method, and the result is shown in Figure 3. The
last two measured area values are displayed in the auxiliary display area and the cumulative sum value of the two
measured area values is displayed in the main display area as shown in Figure 4.
Measure the first area value according to the area measurement method and the result is shown in Figure 5. Press
the "-" key and the auxiliary display area of the screen (line 3) displays "-" as shown in Figure 6. Measure the second
area value according to the area measurement method and the result is shown in Figure 7. The last two measured
area values are displayed in the auxiliary display area, and the cumulative subtracted value of the two measured
area values is displayed in the main display area, as shown in Figure 8.
3) Cumulative addition / cumulative subtraction of volume:
The operations of cumulative addition / cumulative subtraction of volume are similar to those of area.
Stakeout function
Press and hold the "area / volume" key for 2 seconds and the display shows "storage query indicator", which
indicates entering the stakeout measurement mode. In order to set the stakeout "a" and "b" values, press the "on/
measure" key to select the digits of "a" value or "b" value, and press the "+" and "-" keys to adjust the value of the
selected digit. After setting the "a" value, press the "area / volume" key to change to the setting of the "b" value.
After setting the value "b", press the "area / volume" key to finish the stakeout setting and enter the stakeout
measurement status. During the stakeout setting process, press and hold the "power / measurement" key to finish
the stakeout setting and enter the stakeout measurement state.
After entering the stakeout measurement state, the auxiliary display area shows the set distance value of the
nearest stakeout point, and the main display area shows the distance between the current position and the stakeout
point. A positive value indicates a distance greater than the stakeout point, and a negative value indicates a
distance less than the stakeout point. When the distance to the nearest stakeout point is less than 0.1 metres, the
buzzer starts to buzz (If the buzzer is off, it does not buzz). When the stakeout position is reached, the sound of the
buzzer changes significantly. The distance to the stakeout point is: "a + bxn" (n is a natural number other than "0").
Press the "on/measure" key to exit the stakeout measurement state.
Daily maintenance of the instrument
It is forbidden to store the instrument in a high temperature and high humidity environment for a long time. When
the instrument is not used for a long time, remove the batteries and place it in the enclosed bag in a cool and dry
place.
Keep the instrument clean. Use a soft damp cloth for cleaning dust from the surface. Do not use aggressive lotions
for cleaning.
Immersing the instrument in water is prohibited.
Clean the surface of the optical components (including the laser emission window and the signal receiving lens)
according to the cleaning method of the spectacle case camera lens.
Services
1. Within a period of time after the date of purchase, the product under conditions without disassembly or
repair and with normal operations, enjoys warranty service. The following situations are not within the scope
of the free warranty: The instrument is damaged due to abuse or artificial causes. The instrument is
damaged due to disassembly and assembly by the user.
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Warnings: During use of the instrument, they may appear in the main display area.
Message
Cause
Solution
Battery voltage is too low.
Replace with new batteries
The operating temperature of the
Heat the instrument.
instrument is too low.
The operating temperature of the
Cool the instrument.
instrument is too high.
Measurement data out of range
Re-measure.
Measure reflective points with strong reflective
Signal too weak
capabilities or use a sighting board.
Measure reflective points with weak reflective
Signal too strong
capabilities or use a sighting board.
Hardware error
Turn the instrument off and on again. If the
problem is still not resolved after turning the
instrument off and on several times, contact your
dealer.
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