Instruction manual

INSTRUMENT CALIBRATION
4-3
N-Factor Adjustment Procedure
NOTE: Transmission dot "N-factor" is calibrated at the factory
and therefore should not require user calibration.
However, if calibration to a particular 50% dot reference is desired, it is
important that a reference with a true 50% dot area (e.g.; UGRA Plate
Control Wedge, RIT Microline Resolution Target, etc.) is used. Enter
the factory preset N-factors for ortho and u.v. below for future reference.
ortho N-factor_________ u.v. N-factor_________
The N-factor for dot can be adjusted by performing the following
procedure.
1. Press the [
FUNCTION] and [COLOR] keys simultaneously until "N
Dcal Y" displays.
2. Press the [
FUNCTION] key to bypass Density Calibration
procedure.
3. Press the [
ZERO] key to enter Dot Calibration procedure.
4. Select ortho (o) or ultraviolet (u) by pressing the [
COLOR] key.
5. Measure base area on film. "READING" is displayed followed by
"0%" dot value. After the Read button is released, "Read 50%" is
displayed.
6. Press the [
COLOR] key to enter N-Factor menu.
7. Press the [
COLOR] key to toggle between ortho (o) or ultraviolet
(u), if required.
8. Adjust the N-Factor by pressing and holding the [
ZERO] key.
Repeatedly press the c (COLOR) key to increase value or the
d (FUNCTION) key to decrease value.
9. After adjustments, press the [
FUNCTION] key to exit N-factor.