User manual for DM700 ECDIS hardware
Copyright Danelec Marine A/S
MAN11804-10
Page 30/30
c.
the chart scale is larger than 1:16 500.
6.
Open the shortcut menu
Main Menu
Shortcuts
7.
First, set contrast to a maximum, and brightness to a minimum. Look at the black-adjust symbol.
8.
Then if the center square is not visible, turn up the brightness until it just appears.
9.
Or, if the center square is clearly visible (with contrast at maximum, brightness at minimum),
turn the contrast down until the inner square disappears, then turn contrast back up until the
inner square is just visible again.
10.
If the above adjustment is not successful, select a more appropriate chart display palette and
repeat this procedure.
11.
The "black level" is then correctly set. If a brighter display is required, use the contrast control,
but preferably do not adjust the controls unless lighting conditions on the bridge change.
After the “black level” has been set, you can proceed with the color test. For the test you need to
display the color differentiation diagram in the chart view.
12.
Repeat steps 1-3, but instead open cell”AA5C1WOO”. The cell contains the color
differentiation test diagram is shown.
13.
The diagram consists of twenty squares extending over the whole of a 350x270 mm
(approximately) screen. Each square is colored with one of the four main background area
shades (such as shallow water blue, DEPVS), and each carries a two-pixel wide diagonal line in
one of the important line or symbol foreground colors (such as planned route red, PLRTE).
14.
The color differentiation test consists of being able to distinguish the background colors and to
pick out the like foreground colors, i.e. to say that squares 3, 5, 11, 15, 18 and 20 all have a
shallow water blue background, and that squares 3, 10 and 17 have a grey line.
