Darklight Duo-Combination Sensitometer/Densitometer with Automatic Scanning

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Darklight® Duo scan with integrated PC interface, user menu, and automatic scanning

  • For constancy tests of film processors according to German Standard DIN 6868 and International Standard IEC 61223-2-1
  • High precision and reliability
  • Sensitometer according to DIN 6868-2
  • Densitometer with digital display
  • RS232 Interface (9- poles serial socket) for data transmission to PC
  • Integrated user menu for guiding the user through the operation steps for constancy test
  • Stored reference values for up to 25 locations
  • Output of logarithmic speed and average gradient (LS and G) as defined in ISO 9236-1
  • Automatic function for connection measurements for new film batches
  • Output of new reference values according to DIN V 6868-55 (Dmin), sensitivity index SI, contrast ind. CI)
  • Automatical evaluation of all 21 sensitometer steps; measuring time less than 5 seconds!
  • Manual measurement at any place with 180mm arm length

Technical Data

  • Size: 240 x 165 x 60 mm
  • Weight: 800g (without batteries)
  • Power: 4 x AA/ 1.5 V (Alkaline or NiCd) or darklight ® power supply

Sensitometer

  • Specification by German Standard DIN 6868-2and DIN V 6868-55
  • Spectral characteristic -  blue/green switchable
  • Peak wave length
    - blue 460 nm + 10 nm
    - green 510 nm + nm
  • Exposure :
    adjustable in 5 steps, divided for every exposure color
    +0.3 log exp.
    +0.15 log exp.
    -0.15 log exp
    -0.3 log exp.
  • Long term exposure stability :  + 0.02 log exp.
  • Grey wedge -  21 steps
  • Grey wedge constant -  0.15 log exp.
  • Homogenity of the steps :  + 0.01 log exp
  • Precision of the steps :
    5% wedge for duo scan
    1% wedge for duo scan ref
    + 0.05 for D<1 (duo scan)
    + 0.01 for D<1 (duo scan ref )
    Step 1 covered (measuring value for vase and fog =Dmin)


Densitometer

  • Specification by German Standard DIN 6868-2, DIN V 6868-55 and International Standard IEC 61223-2-1
  • Spectral characteristics  :
    - visual optical density according to German standard DIN4512-3
    - internal light source
  • Measuring orifice aperture - Ø 3mm
  • Measuring range : D = 0 up to D> 4.5
  • Measuring accuracy for D< 3 : + 0.01 (max. + 0.02)
  • Repeat accuracy for D : + 0.01
  • RS 232 Interface (9-poles serial socket) for data transmission to PC
  • Integrated user menu
  • Measuring modes
    - manual single measurement
    - 21 step automatic passage
    - 21 step manual measurement
  • Film speed :
    - manual on touch, typical 5 sec.
    - speed variable 3-20 sec.
    - all formats possible

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