Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,592   Posts: 1,545,986   Online: 977
      
Results 1 to 5 of 5
  1. #1

    Join Date
    Apr 2005
    Location
    Guatemala
    Shooter
    Multi Format
    Posts
    159
    Images
    13

    Noritsu DM-1 Densitometer

    I just obtained a Noritsu DM-1 densitometer. It has a selector switch for Transmitted / Reflected Light and calibration buttons for both functions. Although it has a calibration tablet (1 white opaque dot; 1 shiny black dot), I haven´t been able to get a reading that resembles any target values, either with this tablet, paper or film. Has anyone had experience with this equipment that could give me any hints on how to proceed ?
    Photos are made four inches behind the camera

  2. #2
    resummerfield's Avatar
    Join Date
    Jan 2005
    Location
    Alaska
    Shooter
    Large Format
    Posts
    1,285
    For what it's worth-- I once had a problem calibrating the reflection portion of an X-Rite 810. It seemed to calibrate OK, but afterward I couldn't get it to match the calibration tablet. The problem turned out to be the light bulb. It must have been making some light, but failed shortly after. A new bulb solved all problems.
    —Eric

  3. #3
    msage's Avatar
    Join Date
    Mar 2003
    Location
    Washington State USA
    Shooter
    Large Format
    Posts
    271
    Hi Peter
    I agree with Eric, the bulb may be changed. If it is the one I am thinking of, it has transmission in the main unit and reflection unit is a smaller unit atached by a cord? I may need pull ours out of stotage. Also, the calibration tablet is for reflection only, a seperate one is used to calibrate transmission.
    Michael

  4. #4
    L Gebhardt's Avatar
    Join Date
    Jun 2003
    Location
    NH - Live Free or Die
    Shooter
    Large Format
    Posts
    1,684
    Blog Entries
    1
    Images
    18
    Peter, I have used the same unit.

    To calibrate:
    1) put the white dot under and press the zero button on the arm.
    2) Open the cover on the side and adjust the R-Level until the amount matches the marking on the calibration strip.
    3) Then put the black dot under and adjust the reflected gain using the R-Cal knob on the side.

    If that doesn't work you probably need a new bulb as stated above.

  5. #5

    Join Date
    Apr 2005
    Location
    Guatemala
    Shooter
    Multi Format
    Posts
    159
    Images
    13
    Thanks for all your comments. I hope I can get a replacement bulb, if its not one of these esotheric spare parts. I assume that any further calibration efforts are futile if the light source isn`t trustworthy.
    Photos are made four inches behind the camera



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin