Beta Ultra Dottie II, Руководство по эксплуатации

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3.3 Adjusting device settings
After unpacking or after pressing the <RESET> button, you can use Ultra
Dottie II to begin measuring standard plates using the factory settings, or
change the display of the device settings by selecting the ‘Next display’
symbol
You will find the toolbar on the left of the display with
functions that allow you to move the sub-cursor. On the right side of the
display you will find one column for each group of settings.
• Measurement medium (standard plate, polyester plate, paper or film)
• Dot % display (Positive or Negative)
• Unit displayed (cm or inch)
• Screening algorithm (regular or stochastic)
• Illumination (red, green, blue LED)
Important:
Standard plates and polyester plates are measured with a red LED. Use of the blue LED or green LED is only recommended when the
coloring of the plate has a strong proportion of light pink hues (e.g. AGFA N90A), as little image contrast is obtained with red illumination. Film
is measured on a professional illumination table in transmission. This is why no choice of illumination is available for the film setting. With
paper measurement, automatic color selection allows for quicker work, as no switching between the CMY colors is required. Color contrast is
very slight with tones under 10%, so that manual color setting is recommended. For measurements on black, the illumination color needs to
always be manually selected.
Important:
In normal circumstances the reference value
is set to be equal to the nominal value to
produce a linear plate.
However, for certain applications a non-linear
plate may be desirable. In this case Ultra
Dottie II offers the possibility of defining the
reference curve in deviation from the 45°
straight line.