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Merger Duo
Merger Duo

Table of contents

Powering on and Image Settings

1. Open the lens covers (2).

2. Press the ON/OFF (4) button briefly to power the device on.

3. Adjust the interpupillary distance by moving the eyepieces (13) farther or closer to each other. It takes some effort to move the eyepieces.

4. Adjust the symbol sharpness on the displays by rotating the eyepiece dioptre rings (12). In future, it will not be necessary to rotate the eyepiece dioptre rings, regardless of the distance and other conditions.

5. Briefly press the MODE button (6) to select the desired image mode: thermal or digital.

6. To focus on the observation object, rotate the lens focusing rings of the thermal imaging (10) and digital (1)

7. Long press the MODE button (6) to activate the PiP multispectral mode. Briefly press the MODE button (6) to select the image mode of the PiP window: thermal or digital.

8. In thermal imaging and multispectral PiP  modes:

  • Select the calibration mode: manual (M), semi-automatic (SA) or automatic (A) in the main menu (enter the menu by long pressing the MENU button (9)).
  • Calibrate the thermal image by briefly pressing the ON/OFF button (4) (when calibration mode SA or M has been selected). Close the thermal channel lens cover before manual calibration.
  • Select the required amplification level for the thermal image (“Normal” , “High” , “Ultra” ) by short pressing the DOWN (8)
  • Activate the smoothing filter  in the main menu to improve the thermal image as the amplification level increases.
  • Fast switch between the "White hot" palette of the thermal image and the palette selected in the main menu by long pressing the DOWN (8) button.

9. In digital and multispectral PiP  modes with a connected IR illuminator:

  • Shortly press the DOWN (8) button to turn on the IR illuminator.
  • Shortly press the DOWN (8) button to select one of three power levels of the IR illuminator. An increase in power level is required with the increasing distance to the observation object. This increases the discharge rate.
  • To turn off the IR illuminator, press and hold the DOWN (8)

10. Adjust the brightness, display contrast, smooth digital zoom in the quick menu (activate by briefly pressing the MENU button (9)).

11. Power the device off with a long press of the ON/OFF button (4).


  • To prevent accidental decamouflage of the user, the displays automatically turn off when the observer moves the device away from the face.
  • When the device approaches the face, the displays will automatically turn on.
  • The proximity sensor can be disabled/enabled in the “General settings” section of the main menu.

Observation conditions: time of day, weather, different observation objects affect the image quality. Custom settings for brightness, display contrast as well as the function of adjusting the microbolometer sensitivity level will help to achieve the desired quality in a particular situation.​

Warning! Never point the lens at intensive energy sources such as laser radiation emitting devices or the sun. It can damage electronic components in the device. The warranty does not cover damage arising from failure to comply with operating instructions.