CROWN CT44038, CT44039 Optical Rangefinder Instructions

CROWN CT44038, CT44039 Optical Rangefinder

WARNING- To reduces the risk of injury, user must read the instruction manual!

INTRODUCTION

The laser rangefinder is a portable optoelectronic device that can be used to measure distance, angle, height and speed. It has advantages such as high accuracy, quick measuring, low power consumption, especially it can identify small objects(such as flagpoles)from background targets, like trees or bushes.

Measurement target

The rangefinder is suitable for measuring high reflectivity of an object(such as street signs), moderate reflectance(such as a building wall), and low reflectivity objects(such as trees and golf flagpoles, etc.).

LCD DISPLAY

OPERATION INSTRUCTIONS

• Start
  The rangefinder has two buttons: the power button and the mode button “M”. Press the power button shortly and turn the power on. The LCD will display as shown in the below figure.(distance measuring mode)

• Adjust the focus
  The range finder is designed with an adjustable eyepiece(diopter). By adjusting the focusing diopter within a -5 to +5 range, people with far- sighted vision can use laser range finder without glasses. Looking through the eyepiece, turn the diopter left or right until the view is focused with clarity to suit you.

• Mode Selection
  We produce kinds of laser rangefinders, each kind can change modes by short pressing the button ”M”. change by long press the “M” button, ”M” or “Y” in the distance measuring, “KM/h” or “M/S” in the speed.

• “Distance measuring” mode

  1. Function Principle:
  2. LCD display:
     Basic（CT44038 or CT44039):Press the power button shortly, the distance value will display, Long press the power button, the will twinkle and the continuously measuring value will display.
     Upgrade version:Press the power button shortly, the distance value will display.
     “Pin seeker” mode
     In the pin seeker mode, point D may be isolated from a number of points in the background out and keep only the distance d1 to the point. So as to achieve the automatic locking flagpole distance. The other goals were shielded behind the flagpole.

LCD display:

Basic（CT44038 or CT44039): Press the power button shortly, the distance value will display, Long press the power button, continuously measure around the flagpole till the value is stable, this value is the distance to the flagpole.
Upgrade version:It do not have this mode

“Fog” mode

1. Function Principle:
   Because the fog will reflect the laser generating, so the fog will not be able to measure distant targets.
   Filter out the laser reflector fog errors caused by distance(d1=30m), thus ensuring the long-distance measurement range volume.

2. LCD display:
   Basic（CT44038 or CT44039) and upgrade version: Press the power button shortly, the distance value will display based on fog.

“ Angle Finder ” mode

1. Function Priciple:
   Adopt angle sensor to measure the angle.

2. LCD display:
   Basic（CT44038 or CT44039) : it do not have this mode
   Upgrade version: Press the power button shortly, the distance value and height value will display rotational

Speed mode

1. Function Principle:
   Adopt the Pythagorean theorem to calculate the height.

2.  LCD display:
   Basic（CT44038 or CT44039) : it do not have this mode
   Upgrade version: Press the power button shortly, the distance value and height value will display rotational

Speed mode

1. Function Principle:
   For moving objects, ranging twice. Two distance differences, divided by the time interval ranging sides, the speed of moving objects can be obtained.

2. Velocimetry method:

3. LCD display:

For moving objects, ranging twice. Two distance differences, divided by the time interval ranging sides, the speed of moving objects can be obtained.

Velocimetry method:

NOTICE:

• the measuring range of the rangefinder could be influenced by the angle between the laser and the targets. Generally speaking, the measuring range is better when there is a smooth surface, bright color, big surface of targets, and a bigger angle between the laser and the target.
• users need to change to a new battery when “ ”displays. A low battery can affect accuracy, if you do not use the rangefinder for a long time, please take the battery out.
• Do not touch the eyepiece directly, in order to avoid damage,this device has been accurately aligned and adjusted with precise equipment. Never disassemble it at fandom.

If the external lens is stained, please clean it with the lens cloth. Do not use other materials when cleaning so as to prevent the coating from being damaged.
If the external lens is stained, please clean it with the lens cloth. Do not use other materials when cleaning so as to prevent the coating from being damaged.
Collision or high pressure should be avoided when carrying about or operating.
Keep the device in a dry, cool and airy place and avoid dust, direct sunshine and extreme change of temperature.
If there is a problem with the device, send it to a professional department, and never disassemble it by yourselves.
Never transmit the laser towards sun or strong light, so as to prevent the photosensitive element from damage.

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