Calibrating to a White Standard . . . continued
4) Measure the WHITE patch on the
standard. You must hold the unit
depressed until all five readings
have been completed.
> You must set the unit on the
standard so that the maximum
amount of the bottom rubber pad
of the shoe resides on the
standard (refer to Section 4.1).
"CAL READING 1 OF 5" thru "CAL
READING 5 OF 5" is displayed; then
"CALIBRATION UPDATED." The
procedure is finalized and the
unit returns back to main menu.
> During the Cal Reading, the read
head must remain down and
stable or an error message may
occur.
> If "PLEASE WAIT XX (1-30)
SECONDS" is displayed during
calibration, continue to hold read
head down until calibration
readings are over. This will only
occur if the calibration procedure
is performed within 30 seconds of
a previous measurement.
> If "READ ZERO
REFLECTANCE" is displayed
after reading the white spot, go
to step 5. This will only occur if
the calibration values for zero
reflectance have drifted.
THE FOLLOWING STEPS (5 & 6) ARE ONLY NECESSARY IF YOU WANT TO MEASURE
ZERO REFLECTANCE, CHANGE SPECTRAL VALUES, or CHANGE APERTURE SIZE.
5) Steps 5a - 5d are only necessary if "READ ZERO REFLECTANCE" is displayed,
you want to manually activate Zero Reflectance Measurement, or YOU WANT TO
CHANGE APERTURE SIZE.
Zero Reflectance is defined as, "measuring air with no ambient light".
This can be accomplished by holding the unit depressed (take a reading) in a
dark room. In some cases, it is possible to just take a reading under a desk with
no direct light.
To manually activate zero reflectance measurement or you want to
change aperture size, see next page.
CALIBRATION
UPDATED
CAL READING
1 OF 5
CAL READING
2 OF 5
CAL READING
3 OF 5
CAL READING
4 OF 5
CAL READING
5 OF 5
WHITE
33
