Major tech MT145 User manual

INSTRUCTION MANUAL
20M LASER
DISTANCE METER
MT145

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Contents Page no
1. Safety Instruction .............................................................................4
1.1. Permitted Use .........................................................................4
1.2. Prohibited Use ........................................................................4
1.3. Laser Classification ..................................................................4
2. Description ......................................................................................5
2.1. Meter Description ....................................................................5
2.2. Symbols Used on LCD Display ...................................................6
3. Initial Operation and Setting ...............................................................6
3.1. Inserting/replacing Batteries ....................................................6
3.2. Switching On and Off ...............................................................7
3.3. Reference Level Setting ............................................................7
3.4. Distance Unit Setting For Instrument .........................................7
4. Measuring ........................................................................................7
4.1. Single Distance Measurement ...................................................7
4.2. Continuous Measurement (Tracking) & Min Measurement.............8
4.3. Bluetooth Function ..................................................................8
5. Technical Data ..................................................................................9
6. Troubleshooting-Causes and Corrective Measures ...............................10
7. Measuring Condition .......................................................................10
4.1. Measuring Range ..................................................................10
4.2. Target Surface.......................................................................10
4.3. Care .....................................................................................10

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1. Safety Instruction
1.1. Permitted Use
Measuring distances
1.2. 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
approved.
• 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).
1.3. Laser Classification
• This produces 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, protect the eye by avoiding the
laser.
WARNING: Looking directly into the beam with optical aids
(e.g.binoculars, telescopes) can be harmful.
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.
Precautions: Do not look directly into the beam with optical aids.

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2. DESCRIPTION
2.1. Meter Description
1 - Laser Receiving Lens
2 - Laser Emitter
3 - LCD Display
4 - ON/MEAS Button
5 - Label
6 - Triangular Bracket Fixed Hole
7 - Battery Cover
8 - Lanyard Hole

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Potential danger. Indicates the user must refer to the manual
for important safety information.
Indicates hazardous voltages may be present.
Equipment is protected by double or reinforced insulation.
Indicates the terminal(s)so marked must not be connected
to a circuit where the voltage with respect to earth ground
exceeds the maximum safety rating of the meter.
MAX
1.3. INTERNATIONAL SAFETY SYMBOLS
The measurement category (CAT) rating and voltage rating is determined
by a combination of the meter, test probes and any accessories connected
to the meter and test probes. The combination rating is the LOWEST of
any individual component.
2.2. Symbols Used on LCD Display
1 - Laser Active
2 - Reference Level (Rear)
3 - Intermediate Line
4 - Summary Line
5 - Bluetooth
6 - Battery
3. INITIAL OPERATION AND SETTING
3.1. Inserting/Replacing Batteries
1. Remove battery compartment lid.
2. Insert batteries, observing correct polarity.
3. Close the battery compartment again.
• Replace the batteries when the symbol “ ” flashes permanently in
the display.
• Use alkaline batteries only.
• Remove the batteries before any long period of non-use to avoid the
danger of corrosion.

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3.2. Switching On and Off
• Press the ON/MEAS Button to switch the instrument and laser on.
• Press and hold the ON/MEAS Button for 3 seconds to switch off the
instrument.
• The instrument switches off automatically after three minutes of
inactivity.
3.3. Reference Level Setting
The default reference setting is from the rear of the instrument.
3.4. Distance Unit Setting For Instrument
• When switching on, press and hold the ON/MEAS Button longer until the
screen display Unit icon and switch “m” or “ft-in” unit.
• The following unit can be set:
4. MEASURING
4.1. Single Distance Measurement
• Press the ON/MEAS Button to activate the laser.
• Press the ON/MEAS Button again to trigger the distance measurement,
the measured value is displayed immediately.
0.000m 0.000m² 0.000m³
0’00”1/16 0.000ft² 0.000ft³
Distance Area Volume

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4.2. Continuous Measurement (Tracking) & Min Measurement
• 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 value is displayed
dynamically in the first 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, hold down the ON/MEAS Button will
start the continuous measurement, and press the ON/MEAS Button
again to stop the function, the function is terminated automatically after
continuous measurement of 100 samples.
• The MIN data will display in lines 1.
4.3. Bluetooth Function
• Bluetooth function can transfer measurement data directly to mobile
phone by Meterbox APP.
• This APP is available in the Apple App store or Google play.
• Whilst the first connection between the Phone/PC and the Laser
distance meter is being established, a prompt for the Pin-code of the
instrument may be displayed, in this case, enter the code “0000” into
your Phone/PC.

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Function Range
5. TECHNICAL DATA
Range 0.05 to 20m (0.2in to 66ft)*
Measuring accuracy up to 10m Typically: ±1.5 mm(1/16 in)**
(2σ, standard deviation)
Measuring Units m, ft’, in”
Laser Class Class II
Laser Type 650nm, <1mW
Smallest Unit Displayed 1mm
Continuous Measurement *
Min Measurement *
Display Illumination *
and Two-Line Display
Tripod Thread *
Beep Indication *
Bluetooth 4.0 EDR *
Range of Bluetooth 10m
Bluetooth with Apple *
iPod/iPhone support
Bluetooth with SPP support *
Dust Protect/Splash Proof IP54
Operating Temperature 0 to 40°C (32 to 104°F)
Storage Temperature -10 to 60°C (14 to 140°F)
Batteries Type “AAA” 2 x 1.5V
Battery Life Up to 4,000 measurements
Auto Laser Switch-Off After 30 seconds
Auto Instrument Switch-Off After 3min
Dimension 100 x 36 x 23mm
Weight 80g
* Use a target plate to increase the measurement range during daylight
or if the target has poor reflection properties 10m (33 ft).
** In unfavourable use variations, the deviation in favourable conditions
(good target surface properties, room temperature) up to 1 conditions,
such as intense sunshine, poorly reflecting target surface or high
temperature over distances above 10m (33ft) can increase by
±0.15mm/m (±0.0018 in/ft).

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6. TROUBLESHOOTING-CAUSES AND CORRECTIVE MEASURES
Code Corrective Measure
208 Received signal too weak, Use target plate
measurement time too long.
Distance out of range.
252 Temperature too high Cool down instrument
253 Temperature too low Warm up instrument
255 Hardware error Switch ON/OFF the device
several times, if the symbol
still appears, please contact
your dealer for assistance.
Cause
7. Measuring Condition
7.1. Measuring Range
• The range is limited as per Technical Specifications.
• 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.
7.2. 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.
7.3. 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.