Xante ScreenWriter 3 Manual page 125

Fig. 4.26 Sample Calibration Page
Using the Densitometer
A densitometer uses a standard light source to measure the amount of
light reflected from printer output. This measurement is compared to
a standard and expressed as a percentage of gray.
Like any other precision instrument, the densitometer must be
calibrated before each use. Refer to its documentation for
instructions on calibrating and using the densitometer.
After calibrating the densitometer, use it to get density measurements
for the calibration page you printed.
Linearizing the Densitometer Data
Enter the densitometer measurements to calculate the adjustments
necessary to correct printer performance to a linear standard.
___________________________________________ PC Setup 4-39