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3.4.4 Intensity stabilization

The intensity of continuous illumination in the LOW and NORM modes is stabilized. The LG3 performs

independently of the LED temperature, but the stabilization can take from 2 up to 10 seconds. Do not

change the chart position in this period.

Light emitted by external light sources or reflected by objects in front of the LG3 can enter the

illumination unit and affect stabilization. Place the illumination unit in a dark room and avoid reflective

and moving objects in this room.

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Summary of Contents for LG3

Page 1: ...Image Engineering GmbH Co KG Im Gleisdreieck 5 50169 Kerpen Germany T 49 2273 99991 0 F 49 2273 99991 10 www image engineering com LG3 User Manual December 21 2017 ...

Page 2: ...RATING INSTRUCTIONS HARDWARE 5 3 1 Overview 5 3 2 Connecting the hardware 5 3 3 Starting the system 6 3 3 1 Calibration 6 3 4 Continuous illumination 6 3 4 1 Power modes 7 3 4 2 PWM Pulse Width Modulation 7 3 4 3 Setting the illumination level 9 3 4 4 Intensity stabilization 9 3 5 Flicker 11 4 ADDITIONAL INFORMATION 13 4 1 Maintenance 13 4 1 1 Fuse replacement 13 4 2 Storage and transport 14 4 3 D...

Page 3: ...nit and the LG3 Software can control the device Only suitable for indoor use Place your system in a dry constant tempered environment without light interference The optimal ambient temperature range is 22 to 26 degrees Celsius The maximum ambient temperature range is 18 to 28 degree Celsius The system has an internal temperature management system if there is any error regarding the internal temper...

Page 4: ...cope of Delivery LG3 control unit LG3 illumination unit Tripod handle Power supply cable USB cable 2x spare fuses 2A Flight case Control software User manual Calibration protocol Optional equipment LG3 Control Holder and Tripod LG C API 2 2 Commissioning Keep all ventilation slits of the LG3 illumination unit free of foreign objects The minimum clearance is 15 cm LG3 Control Holder and Tripod ...

Page 5: ...d on the display D Multifunctional button function is stated on the display E Display brightness adjustment F Powerswitch powersocket and fuses combination G Power cable H Ilumination unit connection cable I Illumination unit connection socket 3 2 Connecting the hardware Connect the illumination unit 1 to the control unit 2 Plug the cable H into the socket I All open marks must face to the front s...

Page 6: ...ng measurements Therefore it measures the emission towards the device under test e g a camera system Choose a reference point on the chart for the calibration When using an OECF chart we recommend the field with the lowest density Illuminance calibration Illuminance measures how much light illuminates a surface in lux It therefore measures the illumination directed at the light source and is not s...

Page 7: ...umination is preset as a default on the LG3 start up Read chapter 3 5 on how to enter and exit the flicker mode 3 4 1 Power modes Three power modes are available LOW 32 kHz PWM variable duty cycle stabilized illumination level NORM 32 kHz PWM variable duty cycle stabilized illumination level with higher intensities HIGH direct current not stabilized high illumination level over 150 000 lux o The i...

Page 8: ...ty over time at 32 kHz pulse width modulation with 50 duty cycle 0 0 01 0 02 0 03 0 04 0 05 0 06 0 07 0 08 0 09 0 1 Relative Intensity Time ms Puls Width Modulation with 32 kHz simplified representation Relative Intensity Period Time_on Time_off ...

Page 9: ...for 2 seconds Select the illumination feedback unit by pressing the rotary knob A Lux and cd m are available Ensure the selected unit is calibrated with the actual setup Toggle the cursor with the button B through the settings and change the setting by turning the rotary knob A o First line set the actual illumination level in percent and Lux or cd m o Second line set the flicker frequency 0 Hz co...

Page 10: ...ndently of the LED temperature but the stabilization can take from 2 up to 10 seconds Do not change the chart position in this period Light emitted by external light sources or reflected by objects in front of the LG3 can enter the illumination unit and affect stabilization Place the illumination unit in a dark room and avoid reflective and moving objects in this room ...

Page 11: ...ich can affect the image quality and cause the loss of image information The LG3 simulates different light sources with its capability to vary the duty cycle and frequency of the illumination The adjustable duty cycle settings of the 32 kHz frequency can change the illumination and the flicker frequency is modulated on the 32 kHz frequency Modulated flicker frequencies 0 0 5 1 1 5 2 2 5 3 Relative...

Page 12: ...econds Illumination feedback in lux and cd m is not available in flicker mode Toggle the cursor with the button B through the settings and change the setting by turning the rotary knob A o First line set the actual illumination level in percentage o Second line set the flicker frequency 0 Hz continuous illumination as described in chapters 0 0 o Third line set the flicker duty cycle Press button D...

Page 13: ...ent the fuses will break to protect the device Broken fuses need to be replaced Only use T2 250E fuses TURN THE DEVICE OFF DISCONNECT FROM THE POWER SUPPLY ENSURE ALL CABLES ARE DISCONNECTED Fuse replacement Lift the fuse cover located over the power switch using a small flathead screwdriver Lift the red fuse holder using a small flathead screwdriver Replace the defected fuse Place the fuse holder...

Page 14: ...is over Electrical and electromechanical components are included in LG3 Observe your national regulations and ensure that third parties cannot use LG3 after disposing of it Contact Image Engineering if assistance for disposal is required 5 TECHNICAL DATA SHEET See annex for the technical data sheet It can also be downloaded from the website of Image Engineering https image engineering de support d...

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