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LDM-40
User Manual
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CEM LDM-40 User Manual

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Page 1
Laser Distance Meter
Model: LDM-40
User Manual
Please read this manual before switching the unit on.
Please read this manual before switching the unit on.
Important
Important safety information inside.
safety information inside.
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Laser Distance Meter User Manual
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Laser Distance Meter User Manual
Content
Safety Instruction
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The compact and handy base model was specifically designed for indoor applications. Shortcut and Soft grip keys for addition, subtraction, area and volume calculation make measuring fast and very reliable.
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Start-Up Initial Operation and Setting Measuring Functions Technical Data Troubleshooting-Causes and Corrective Measures Measuring Conditions
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Labelling
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Laser Distance Meter User Manual
1.Safety Instruction
Permitted Use
• Measuring distances
• Computing functions, e. g. areas and volumes
Prohibited Use
• Using the instrument without instruction
• Using outside the stated limits
• Deactivation of safety systems and removal of explanatory and hazard labels
• Opening of the equipment by using tools (screwdrivers, etc.), as far as not specifically permitted for certain cases
• Carrying out modification or conversion of the product
• Use of accessories from other manufacturers without the express approval of CEM Technology.
• Deliberate or irresponsible behavior on scaffolding, when using ladders, when measuring near machines which are running, or near parts of machines or installations which are unprotected
• Aiming directly into the sun
• Inadequate safeguards at the surveying site (e.g. when measuring on roads, construction sites, etc.)
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Laser Distance Meter User Manual
Laser Classification
The CEM produced a visible laser beam which emerges from the front of the instrument.
Laser Class 2 products:
Do not stare into the laser beam or direct it towards other people unnecessarily. Eye protection is normally afforded by aversion responses including the blink reflex.
‘s
WARNING
Looking directly into the beam with optical aids (e.g. binoculars, telescopes) can be hazardous.
Precautions:
Do not look directly into the beam with optical aids.
:
CAUTION:
Looking into the laser beam may be hazardous to the eyes.
Precautions:
Do not look into the laser beam. Make sure the laser is aimed above or below eye level.
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Laser Distance Meter User Manual
2 Start-Up.
Inserting/Replacing Batteries
1) Remove battery compartment lid.
2) Insert batteries, observing correct polarity.
3) Close the battery compartment again.
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Replace the batteries when the symbol “ “ flashes permanently in the display.
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• Use alkaline batteries only.
• Remove the batteries before any long period of non-use to avoid the danger of corrosion
Keypad((See “Figure B”)
1- button
ON/MEAS
2- button
Area/Volume
3- button
Indirect measurement
4- button
Single/Continous Distance measurement
5- ( ) button
Plus
6- ( ) button
Minus
7- button
Storage
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See “Figure A”)
8- button
Reference
9- button
Illuminating/UNITS
10- button
Clear/Off
Figure A
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7 8
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Figure B
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LCD Display (“ ”)See figure C
1- Laser active 2- Reference level (front) 3- Reference level (rear) 4- Variable measuring functions
Area measurement Volume measurement Indirect measurement
Indirect (second) measurement 5- Single distance measurement 6- Battery status 7- Historical memory 8- Instrument error warning 9- Continuous measurement & Max and Min measurement 10- First value display line 11- Second value display line 12- Summary line for last measure or calculation result
Laser Distance Meter User Manual
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1 2
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Figure C
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Laser Distance Meter User Manual
.3 Initial Operation and Setting
Switching On and Off
Switches on the instrument and laser.
Press this button longer to switch off the instrument.
The instrument switches off automatically after three minutes of inactivity.
Clear Button
The last action is cancelled or the data display is cleared. If in the mode of History storage, press Storage
button and Clear button simultaneously will clear all storage data in the memory.
Reference Level Setting (See “Figure D”)
The default reference setting is from the rear of the instrument. Press this button to take the selection from the front edge , A special beep sounds whenever the reference setting is changed. After a re-startup the reference returns automatically to the default setting (rear reference).
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Figure D
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Laser Distance Meter User Manual
Display Illumination
Click illumination button of the display can be switched on or off, user can trigger the function when
he/she is in darkness situation. The value is clear visible on the LCD
Distance Unit Setting For Instrument
Click the button longer to change the next type of unit, then continue click the button for
the next unit selection
/UNITS
m, ft. in, ft+in
to
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Laser Distance Meter User Manual
.4 Measuring
Single Distance Measurement
Press to activate the laser. Press again to trigger the distance measurement. The measured value is displayed immediately.
Continuous Measurement (Tracking) & Max and Min Measurement (See “Figure E”)
The continuous measurement function (tracking) is used for the transferring of measurements, e.g., from construction plans. In continuous measurement mode, the measuring tool can be moved to the target, whereby the measured value is updated approx. every
0.5 seconds in the third line. The corresponding minimum and maximum values are displayed in the first and second line. As an example, the user can move from a wall to the required distance, while the actual distance can be read continuously. For continuous measurement, push button until the indicator for continuous measurement appears in the display. And press MEAS or Clear button again to stop the function. The function is terminated automatically after continuous 100 times measurement.
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dynamically
MIN
MAX
Figure E
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Laser Distance Meter User Manual
.5 Functions
Addition / Subtraction
Distance measuring.
The next measurement is added to the previous one The next measurement is subtracted from the previous one The last step is cancelled.
Return to the single distance measurement
Area Measurement
Press the Area/Volume button. The symbol appears in the display. Press button to take the first length measurement (e.g. length). Press again to take the second length measurement (e.g. width). The result of the area measurement is displayed in the third line, the individually measured values are displayed in lines 1 and 2.
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Laser Distance Meter User Manual
Volume Measurement
For volume measurements, push Area/Volume button twice until the indicator for volume measurement appears in the display. Afterwards,
press to takes first distance measurement (e.g. length) press to takes second distance measurement(e.g. width)
The result of the area measurement from the values already measured is displayed in the summary line.
Press to takes the third distance measurement(e.g. height). The value is displayed in the second line.
The result of the area measurement is displayed in the third line, the two previously measured values in lines 1 and 2.
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Laser Distance Meter User Manual
Indirect Measurement
Indirect measurement - determining a distance using 2 auxiliary measurements e.g. when measuring heights that require the measurement of two or three measurements as following step: Press this button once, the display shows.
Aim at the upper point (1) and trigger the measurement. After the first measurement the value is adopted. Keep the instrument as horizontal as possible.
Press to measurement the distance result of the horizontal point (2). The result of the function is displayed in the summary line.
The distance to be measured flashes in the symbol.
. (See ”Figure G”).
1
2
Figure G
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Laser Distance Meter User Manual
Indirect Measurement - Determining a Distance Using 3 Measurements
Press this button twice; the display shows the The distance to be measured flashes in the symbol.
Aim at the lower point (1) and trigger the measurement. After the first measurement the value is adopted. Keep the instrument as horizontal as possible.
Press to measurement the distance result of the horizontal point (2).
ress to measurement the distance result of the upper point (3).
P
The result of the function is displayed in the summary line.
Historical Storage
the previous 20 records (measurements or calculated results) are shown in the reverse order. Use the or buttons to navigate through these records. You can clear all records by press Storage button and Clear button simultaneously in historical storage mode.
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symbol.
(See”Figure H”)
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Figure H
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Figure I
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6.Technical Data
Technical Specifications
Range Measuring accuracy up to 10m
σ
(2 , standard deviation) Measuring units Laser Class Laser Type Area, Volume Calculations Indirect measurement using Pythagoras Addition/Subtraction Continuous Measurement Min/Max Distance Tracking Display illumination and multi-line display Beep indication Dust Protect/Splash proof History measurement records
0.05 to 40m
Typically: ±1.5 mm* (± 0.06 in ) m,in,ft Class II 635 nm, <1mW
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*(0.15 ft to 131ft*)
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Laser Distance Meter User Manual
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Keyboard Type Operating Temperature Storage Temperature Battery Life Batteries Auto. laser switch-off Auto instrument switch-off Dimension Weight
* Use a target plate to increase the measurement range during daylight or if the target has poor reflection properties! ** in favourable conditions (good target surface properties, room temperature) up to 10 m (33 ft). In unfavourable conditions, such as intense sunshine, poorly reflecting target surface or high temperature variations, the deviation over distances above 10 m (33 ft) can increase by ± 0.15 mm/m (± 0.0018 in/ft).
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Super Soft-Touch (Long life) 0°C to 40°C(32°F to 104°F)
-10°C to 60°C(14°F to 140°F) up to 4,000 measurements Type AAA 2 x 1.5V after 0.5 min after 3 min 115x48x28mm 135g
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Laser Distance Meter User Manual
7.Troubleshooting – Causes and Corrective Measures
Code
204 208
209 252 253 255
Cause
Calculation error Received signal too weak, measurement time too long. Distance >50m Received signal too strong Temperature too high Temperature too low Hardware error
Corrective measure
Repeat procedure Use target plate
Target too reflective(use target plate) Cool down instrument Warm up instrument Switch on/off the device several times, If the symbol still appears, please contact your dealer for assistance.
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Laser Distance Meter User Manual
8.Measuring Sonditions
Measuring Range
The range is limited to m. At night or dusk and if the target is in shadow the measuring range without target plate is increased. Use a target plate to increase the measurement range during daylight or if the target has poor reflection properties.
Target Surfaces
Measuring errors can occur when measuring toward colorless liquids (e.g. water) or dust free glass, Styrofoam or similar semi-permeable surfaces. Aiming at high gloss surfaces may deflect the laser beam and lead to measurement errors. Against non-reflective and dark surfaces the measuring time may increase.
Care
Do not immerse the instrument in water. Wipe off dirt with a damp, soft cloth. Do not use aggressive cleaning agents or solutions. Handle the instrument as you would a telescope or camera.
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.9 Labelling
Type:LDM-100by CEM
www.cem-meter.com.cn
Laser Distance Meter User Manual
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Laser Distance Meter User Manual
Rev.111125
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