Newcon Optik LRM 2500CI User manual

Operation Manual
LRM 2500 / LRM 2500CI
LASER RANGE FINDER
MONOCULAR
105 Sparks Ave., Toronto, ON M2H 2S5, Canada

IMPORTANT INFORMATION
Read prior to activation
You have just purchased a sophisticated electro-optical device
that emits invisible laser radiation. To operate it properly, please
read this manual carefully.
NEVER direct laser beam at the eyes of people or animals
NEVER aim the unit at the Sun or bright sources of light
NEVER subject the unit to impacts
NEVER transport the unit without its case
NEVER disassemble the unit. This may be hazardous for
you due to high voltage currents in the system
ALWAYS keep the unit out of children’s reach
ALWAYS remove the battery when the device is not in use
for a long period
ALWAYS store in a dry place
Caution - use of controls or adjustments, or performance of
procedures other than those specified herein may result in
hazardous radiation exposure
Caution - use of optical instruments such as monocular,
loupes, mirrors, lenses, etc. with this product increases eye
hazard
Note: Avoid eye exposure to direct laser beam or its close
reflection

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Prevent bright light from focusing through the eyepieces
Never aim the unit at highly reflective objects like mirrors
and retroreflective surfaces, which are in close proximity to
the laser rangefinder. This can lead to the permanent
damage of the photoreceiver incorporated into the device.

TABLE OF CONTENTS
1. BRIEF DESCRIPTION 2
2. DEVICE APPEARANCE 4
3. DELIVERY SET 7
4. SPECIFICATIONS 8
5. OPERATION INSTRUCTIONS 10
Using the Device 11
Factors affecting measuring distance 12
Target selection logic 13
Operation and service modes 14
Accuracy correction 16
Compass calibration (CI model only) 18
Setting interface format (CI model only) 18
Gating mode 19
Data Recall mode 20
Computer interconnectivity 21
GPS interconnectivity (CI model only) 22
Short mode switching scheme 22
6. BEST MEASURING TECHNIQUE 23
7. STORAGE AND MAINTENANCE 25
8. TROUBLESHOOTING 26
9. WARRANTY 27
10. CUSTOMER SUPPORT 28
11. QUALITY CERTIFICATE 29

2
CAREFULLY READ ALL THE INSTRUCTIONS PRIOR
TO USE!
FAILURE TO OBEY THE INSTRUCTIONS WILL VOID
THE WARRANTY AND MAY CAUSE INJURY!
1. BRIEF DESCRIPTION
LRM 2500 / LRM 2500CI Laser Rangefinder Monocular
(The unit) is an advanced laser range finder system that enables
instant distance, speed, vertical and horizontal angular
measurements. An outstanding optics provides a sharp, clear
image under any observation conditions.
The unit utilises time-of-flight method of distance and speed
measurement. The System sends invisible, eye safe laser
pulses to the target. The returned pulses are captured by the
digital circuitry. The time difference is used to calculate the
distance to the target. A built-in digital compass measures an
angle between the optical axis and direction to the magnetic
North Pole.
The unit complies with CFR 21, Part 1040.10 and Part 1040.11.
A built-in inclinometer allows elevation angle measurements
and height (depth) calculations.

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Key Features of the LRM 2500/2500CI Laser Rangefinder
Monocular
Modern digital circuitry allows targeting through most
types of glass
First, last or the most reflective target acquisition
Meters/Yards/Mils/Degrees/KMH/MPH display
Last 10 measurements recall
Selectable reticle shape (+ or )
Gating capability
Speed detector
Accurate digital compass (CI Model only)
Accurate digital inclinometer (CI Model only)
RS-232 bidirectional communication
GPS interoperability with PLGR/DAGR protocol (CI
Model only)

4
2
3
4
5 6 7
1
2. DEVICE APPEARANCE
1 – Eyepieces 2 – Objective lens
3 – Laser emitter lens 4 – Receiver lens
5 – M (Mode) button 6 – A (Action) button
7 – Body of the device 8 – Rubber grip
Fig. 1.1 Front view

5
1 – Eyepiece 11 – Identification imprint
9 – Battery compartment cover 12 – Classification imprint
10 – Tripod socket
Fig. 1.2 Rear view
9
1
12
10
11

6
Fig. 2 Display
1 – Low battery indicator 2 – Reticle (either -¦- or )
3 – Units of measurement 4 – Measurement result
5 – Gating indicator 6 – Laser active indicator
7 – Ready mode indicator 8 – Setup mode indicator
4
6
2
5
1
3
7
8

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3. DELIVERY SET
Standard delivery set for LRM 2500CI includes:
Qty
LRM 2500CI
Carrying case
Neck strap
Cleaning cloth
User’s manual
Warranty card
RS-232 Computer cable
CD with communication software
9V non-magnetic Lithium battery
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
Optional items
GPS cable
Hard Case
Exact delivery set depends on details of a contract or purchase
order.

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4. SPECIFICATIONS
Optics
Magnification 7x
Objective lens diameter 25 mm
Exit pupil diameter 3.6
Field of view 8
Type of coating Fully multi-coated optics
Dioptre adjustment range ±4
Range Finder
Laser Class 1, eye safe, 905 nm
Measuring range 10 – 2,500 m
Accuracy and display resolution 1 m
First, last and auto target
selection
Yes
Meters / Yards display Yes
Last 10 measurements recall Yes
Reticle -¦- or 
Gating capability 100 - 2,500 m; 100 m step
Speed Detection
Measured speed range 5-400 km/h or 3-250 mph

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Accuracy 1 km/h or mph
Compass (CI Model only)
Measured azimuth range 6400 mils /360
Accuracy ±1
Inclinometer (CI Model only)
Measured elevation range ±60
Accuracy ±1
Height measuring Yes (Meters or Yards)
Power
Battery 9V Lithium (non-magnetic)
Battery capacity Min 5,000 measurements
(Scanning regime)
'Low Battery' indicator Yes
Environmental
Operational temperature range -25…+50oC (-13…+122oF)
Storage temperature range -45…+65oC (-49…+149oF)
Mechanics
Tripod thread ¼” x 20 TPI
Weight without battery 452g / 460g (CI)
Weight with hard case 2.2 kg
Dimensions 127x125x60 mm

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5. OPERATION INSTRUCTIONS
To install a battery:
Slide the battery compartment cover down (9, Fig.
1.2)
Install the battery observing polarity
Don’t apply superfluous strength while pushing the
battery inside the compartment.
Close the compartment cover
If the battery does not fit the compartment easily, it means
that either polarity was reversed or the battery contacts
are jammed.
To take a battery out:
Slide the battery compartment cover down (9, Fig.
1.2)
Shake the rangefinder gently towards the open end of
the battery compartment
Pull out the battery
Note: Battery in metal casing will diminish compass
accuracy. Non-magnetic batteries should be used for the
utmost compass performance.
LRM 2500/2500CI is equipped with battery monitoring
sensor. If display shows “LOW BATTERY” warning
when battery voltage falls below 6.5V this indicates that

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the battery is used up. You can still get readings, but the
battery needs to be replaced soon.
Using the Device
The LRM 2500/2500CI operational procedures are design
to allow the user to use most applicable options in the
fastest time possible. To activate it, press and hold Action
button (6, Fig.1.1) for one second. At start the unit comes
into Ready to Measure mode indicated by the word
‘READY’ on the display visible through the eyepiece.
Pressing Action button (6, Fig. 1.1) again will initiate
measurement procedure. The results of measurement are
displayed in default form of “Distance (M), Azimuth
(mils) and Elevation (mils)” measurement parameters also
can be modified to user preference (see Setup Mode).
If results of measurement are unreliable four dashes
(‘----‘) will be displayed in the area (4, Fig. 2).
Pressing Mode button (5, Fig. 1.1) gives the user the
options to change settings from Factory default to specific
modes required by user. For full list of Mode options
please refer to Operation and Service modes
If the target is located below the unit the result of vertical
measurement (elevation or height) will be preceded with
minus (“-“) sign.

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Factors affecting measuring distance
Though maximum measurement distance depends on
target reflectivity, weather conditions and other
conditions, for most targets the unit will provide accurate
ranging for up to 2,000 meters. Under good conditions a
large size target can be measured up to 2,500 meters.
Target reflectivity depends on its color, surface finish,
size, shape, position in relation to the laser beam, etc.
Bright target colors are more reflective than darks. A
polished surface is more reflective than a rough one.
Larger targets reflect better than small ones. Ranging a
target perpendicular to the laser beam provides better
results than the one positioned at a sharp angle to the
beam.
Weather conditions that influence air transparency (rain,
fog, snow, mist) reduce maximum range. Bright sunny
days will reduce performance as well as IR sun radiation
may cover reflected laser impulses.
While the unit will measure through many glass types,
measuring through glass may reduce accuracy.
Natural hand tremor decreases the accuracy of long
distance ranging. Using of a tripod is highly
recommended.
Note: device may produce false readings when reticle is
aimed at the sun or in ± 20˚solid angle from the sun.

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Target selection logic
On its way towards the target the laser beam may be
reflected from various objects, thus decreasing ranging
accuracy. The smaller, the farther, and the less reflective
is the target – the higher is the possibility of obtaining an
incorrect measurement.
To improve accuracy the unit has a built-in target
selection logic that allows user the option of choosing
which target to range: the nearest (‘first’), the farthest
(‘last’), or the most reflective (‘auto’).
This mechanism helps selecting the target when ranging
from behind the bushes, wires, through the falling snow,
or in similar conditions. Furthermore, it enables ranging a
target in front of a bigger object, such as a wire in front of
the wall.
Note: Even with target selection logic the unit may not
always be able to range the desired target as its
reflectivity may be too low to produce enough laser beam
reflections for statistically reliable calculation. Individual
Measurement and Scanning regimes
The unit can operate in two methods: (1) Individual
Measurement and (2) Scanning. In Individual
Measurement method the unit performs single
measurement when Action button is pressed shortly, in
Scanning regime the unit repeatedly measures and
displays results every second while A button is pressed.

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To activate Scanning regime press and hold Action button
in Ready mode. The unit will work in Scanning regime
while Action button is pressed.
Scanning or Individual Measurement regimes are
available for any selected mode of measurement. When
two or more parameters are measured in Scanning regime
though first result will be displayed, the second and other
results will be shown at the display if Action button is
released. Nevertheless all data is transferred to the PC and
recorded in internal memory, and may be recalled (see
Data Recall mode for details.)
Operation and service modes
Pressing Mode button (5, Fig.1.1) in Ready mode
switches the unit between modes of operation, to activate
any desired mode from the menu you must confirm your
selection by pressing Action button (6, Fig.1.1).The unit
has the following modes of operation:
Ready – Unit is ready to perform measurements
dFLt – sets default mode of operation with factory
settings,
GAtE – allows to set gating distance for
measurement
Std – allows the user to select single action
measurements:
oDistance only (d)

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oCompass Only (C) 1
oElevation Only (E) 1
oSpeed Only (S)
oHeight Only (H) 1
oSpeed + Distance (Sd)
oDistance +Compass + Elevation (dCE)
1
Unit – allows the user to select units of desired
measurements,
oDistance from M to Y
oCompass & Elevation from Mils to
Degrees
oSpeed from KMH to MPH*
*note this option is only available if Std
Speed is selected
rEc – allows data recall of the last 10 measurement
results,
oCLr – Clears all Measurement
SEt – allows the user to select the following
advanced options:
oFrSt – First Target Measurement
oLASt – Last Target Measurement
oAUtO – Last Target Measurement*
oPLGr – Communication to PLGR1
GPS*
oPC – Communication to PC*
oReticule – Change reticule from +
(cross) to (rectangle)

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oCAL – Compass calibration
▪CALc – compass calibration
(CI model only)
▪Corr – accuracy correction of
active measurement parameters
*not shown in the menu if currently selected
1– available for CI model only.
Accuracy correction
If the System produces any measurement errors that lie
beyond unit specification, it may be an indication that unit
requires calibration similar to one conducted at
production level. To do accuracy correction, please select
Corr from CAL menu.
Perform correction according to required measurement
parameters by pressing Action button, see table below:
Active mode of
measurement
(Std)
Correction
parameter Condition
S, Sd, d Distance Install unit at 1 meter1
from flat target2
C, E Azimuth and
elevation
Put unit in a level plane
and aim it to the North
direction3