Datacolor 45IR User Guide, 5.2014, Version 1.0 (4230-0402M)
21
Calibration
Prior to every series of measurements calibration should be carried out. After calibration the device is stable
for the long term; however it is recommended to perform a calibration before starting a new measurement
task just to be sure the device is working properly.
For density measurements the calibration is carried out on paper white. This will ensure that the density
values are in direct ratio to the ink thickness which is applied on the paper. When there is a change in the
paper type, a new calibration has to be done. Only in a few cases density measurements are referenced to an
absolute white standard.
A calibration is as easy to carry out as a measurement: Select the “soft key”
Calibration
and place the device
with the measurement head on top of a blank area of the paper sheet. The calibration can be started now by
pressing either the enter button or the green measurement button.
After one second there will appear a window with the message that the calibration has been done. The
device is now ready for measurements. The message window disappears with the next measurement.
During the calibration process always take care that the instrument is on a flat, stable surface and that the
material backing the paper is the same as for the following measurements (white, gray or black). When the
paper sample is printed on both sides, it is recommended to use a black backing material in order to avoid
mis-measurements due to color shining through the back of the opaque paper.
