Koeth chameleon advanced User manual

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Color densitometer
C h a m e l e o n advanced
Operation manual

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Measure
Calibration
paper white
Density
Select color
The enables very fast and efficient working.
Nearly all functions of the may be selected only
with a single click of on the appropriate color pad, with-
out any nasty menue navigation!
Click Hold : the current operating mode is indi-
cated. Example:
Only on white paper and only in density mode (“dEn“)! Hold
for approx 2 sec until only decimal points remain visi-
ble. Zero function is retarded to prevent erroneous triggering
Click : The display toggles between the preset function,
e.g. dot, and density reading.
Higher resolution of 0.001 for D < 1.00 available (optional).
Hold : The color groups are displayed in the following se-
quence: den 4c →All →den S1..S4 . After releasing the
button, the last mode indicated will be saved.
1) Density of the process color
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Chameleon
Switch on
Switch off
Click to activate unit. Last value is indicated.
If densitometer was not in use for more than one minute, it
turns off automatically.
.
1) 2) 3)
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color

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Click : the sequence of display will be as follows:
c→m→y→k→auto 4c. Example: y
auto 4c = automatic color select; last reading is indicated
by a flashing decimal point.
2) 4 colors of a reading are displayed simultaneously
(e.g. to check the color of the ink). Mode is indicated by
the flashing decimal points. Not possible in dot mode and
in combination with special color mode.
Return to den 4c: Click .
3) Density of the special color (Pantone, HKS).
The sequence of display will be as follows:
S1 →S2 →S3 →S4 →auto S.
auto S = automatic color select; last reading is indicated
by a flashing decimal point.
Besides indication of the appropriate icons den S1...S4,
resp. dot S1...S4 during reading operation, the display
blinks at a rate of 1 second to identify special colors.
Example: 2 special colors are allocated to S2 and S4.
Memory cells S1 and S3 are free.
See also: “Save special colors”and “Delete special col-
ors”
ALL:
color
color

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Functions Hold : modes are displayed in the following sequences:
dot →dotGn 25-50-75 →dotGn 40-80 →dotGn 60 →
bAL →trP . After releasing the button, the last mode indi-
cated will be saved.
1) see “Dot area“
2) see “Dot Gain“
3) see “Change dot reference“
4) see “Grey balance“
5) see “Trapping”
1) Read solid color density. Example: D = 1,59.
2) Select: dot (see: “Functions”). Solid color stands for
100%
3) Read dot value
Example: 40% cyan dot area has been read, result: 49% (cor-
responds to dot gain = 9%).
1) 2) 2) 3)
4) 5)
Dot Area Procedure:
Reading is only possible if at least one solid color with a
minimum density of D = 0.25 has been previously read. If
density falls below D = 0.50, an acoustic signal appears.
Dot measurement values are calculated according to
Murray Davies.
mode
1)
2)
2)
4)
3)
5)
1)
2)
3)

Dot gain Select: dotGn (dot gain). There are the following 3 options
(see „functions“). example: dotGn 40-80
After selection of the dot reference, the next steps are
marked by flashing figures. The display shows the solid color
to be measured and the selected dot reference (e.g. dot gain
40-80%):
1) Read solid color, e.g. D = 1,59.
2) Read first dot area, dot gain is 9%.
3) Read second dot area, dot gain is 7%.
4) Read third dot area, if applicable.
5) New reading cycle: Select next ink zone or next color,
click and repeat steps 1) through 4).
An acoustic signal appears in case of an operating error (e.g.
in case of negative dot gain).
For dot readings to be repeated, a new measurement cycle
beginning with a solid color measurement must be initiated.
1) Dot Gain dotGn 25-50-75 % and
2) Dot Gain dotGn 40-80 % is preset and cannot be varied.
3) Dot Gain 60%: customized dot reference can be varied
by user as needed. See: “change dot reference”
Select: bAL. If you measure the 3 solid process colors c, m, y
(no special colors!) and then switch to bAL, the result will be
the grey balance. If only 2 solid process colors have been
measured before, the result will be the color balance.
Example: color balance cyan + yellow.
Grey balance
Color balance
start
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1)
2)
3)
3)

Trapping
Save
special colors
Select: trP. The next steps are marked by flashing figures:
1) Read the first printed color D1.
2) Read the second printed color D2.
3) Read the overprint color D12,the trapping value will be in-
dicated in % according to Preucil.
4) New reading cycle: click Start and repeat steps 1)
through 3).
To enable the densitometer to identify special colors (Panto-
ne, HKS), apropriate reference colors must be saved.
1) Calibrate on paper white
2) Select free memeory cell S1-S4 with Free space is
indicated by a hyphen. Example: S1 was selected.
If no memory cell is available, delete any special color
cell first (see “Delete special color“).
3) The reading is specified as reference value, all fur-
ther readings will refer to this value.
4) To terminate special color saving: Got to automatic
mode (auto 4c or auto S).
The user may define any individual special colors and keep
theminadryanddarkplacetogether withthe calibration chart.
first
color
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1)
2)
3)
3)

Measure
special colors
Delete
special colors
Identified special colors are automatically assigned to the
associated memories; a blinking display signals correct as-
signment.
Special colors not identified are assigned to the process
color memory auto 4c (no blinking display).
Select color to be deleted. Hold for approx. 5 sec,
clr-symbol (clear) appears, and the selected special color
memory will be deleted.
Example: S2 was deleted.
All special colors are deleted if the is in “autoS”
mode
Chameleon
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Change dot
reference
1) Select customized dot reference (see “Dot Gain”).
2) Press + simultaneously for approx. 2 sec until
display flashes.
Click (+) or (-) until the correct reference value
appears (10 - 90%).
3) Alternative to 2): Set measuring head on the center of
the color gradient of the calibration chart, hold and
move head up(+) or down(-) until correct reference value
appears on the display.
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4) To confirm new dot reference: Take any measurement.
The preset dot references “25-50-75%”and “40-80%”can-
not be varied!
1) Set to zero on white pad “Zero cal”of the calibration chart.
2) Read all colors to be calibrated (auto 4c or auto S).
3) Press + simultaneously for approx. 2 sec until
CAL appears.. Select color with .
Click (+) or (-) to adjust reference value.
Calibration
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color
mode cal

Fix here a new calibration chart
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The has to
be replaced every 24
months.
The chart should show no
damages or scratches and
has to be stored in a dry
and dark place.
CalibrationChart
If reference values are too high or too low, an acoustic sig-
nal appears or values are blocked.
4) Alternative to 3): Select color (via or ) Set
measuring head on the center of the color gradient of
the calibration chart, hold and move head up(+) or
down(-) until correct reference value appears on the dis-
play.
5) To confirm calibration: Take any measurement.
6) Abort calibration: Press + simultaneously for
approx. 2 sec.
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Information on your special colors
S1 Attach sample here
S2 Attach sample here
S3 Attach sample here
S4 Attach sample here
Datatransmission
Power supply
Start (Record job) and stop (End job) data recordung with
(optional).
The unit is equipped with a high quality 9V alkaline battery.
Thanks to the latest power save circuitry up to 1.000.000
readings can be taken before the battery is exhausted.
To change battery, simply remove the body screw.
Please make sure to observe the applicable national regula-
tions for the disposal of exhausted batteries.
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