99
Explanation
Error
No.
Symptom Item to check Corrective action
Reference
page
8 Measurement values are
inconsistent.
Is the measuring object
stable?
Conduct measurement while the
measuring object is stable.
—
Is the measuring object of
low luminance?
Repeatability of x, y worsens if the
measuring object of low luminance is
measured.
70,
26
It especially worsens when the
measurement angle is 0.2º or 0.1º.
It also worsens when the
measurement time is short. Make the
measurement time longer.
Is the measurement sync
frequency appropriate when
measuring the display?
Set the appropriate measurement
sync frequency.
31,
28
Use the MULTI INTEG-NORMAL mode
or the MULTI INTEG-FAST mode.
Measure in the EXT SYNC mode.
Have the ambient
temperature and /or
humidity changed
significantly?
Perform measurement under an
environment free from changes in
ambient temperature and humidity.
3
Did you start measurement
immediately after startup?
Allow the instrument to warm up for
20 minutes or more from when the
power is switched on.
23
9 Measurement values
appear incorrectly.
Is the objective lens clean? Should dirt get on the lens, wipe it off
with a dry and soft cloth or lens
cleaning paper.
5
User calibration may not be
performed correctly.
Check the values without user
calibration (i.e. set the calibration
channel to 00 (OFF)).
66
Is the calibration channel
correct?
Select the calibration channel
according to the light source of
luminance and chromaticity close to
the object.
66
Is the closeup lens
attached?
Select the lens type setting according
to the attached closeup lens.
50,
70
Has the ND filter been
attached?
Select the ND filter setting according
to the attached ND filter.
52
Has the object been
focused?
Adjust the focus after adjusting the
diopter.
13,
15,
71
10 The measurement stops
halfway and does not finish
in the set measurement
time.
Is the measuring object of
high luminance?
When measuring an object of high
luminance, the sensor may be
saturated by exceeding the upper
limit of the current measurement
setting.
52
Use the ND filter.
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