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Maintenance
J17 Instruction Manual
6-3
Basic Troubleshooting
This section lists some common problems and their
most likely causes.
The J17 Does Not Power On, or Backlight
Does Not Light
Check the battery. Install a fresh battery, and ensure
that it is seated correctly. If the optional AC adapter is
available, use it to connect the J17 to a power
source.
The Display Shows Err
The word Err (error) appears on the display when
you press a button that is not appropriate with the
sensorĆhead attached to the J17, or not appropriate
in the chosen operating mode.
Measurements are Inaccurate
If measurements taken with the J17 are inaccurate or
inconsistent, check the operating setup:
H Connect the sensorĆhead to the J17 before
powering on. If not, turn the J17 off, then turn it
back on. The J17 will load data from a sensorĆ
head at powerĆon.
H Make sure that the sensorĆhead is positioned so
that the measurement field is entirely filled. This is
important for luminance, radiance, and chromaĆ
ticity measurements.
H Make sure that the area being viewed by the
sensorĆhead is uniformly illuminated. This is
important for luminance, radiance, and chromaĆ
ticity measurements.
Maintenance
J17 Instruction Manual
6-3
Basic Troubleshooting
This section lists some common problems and their
most likely causes.
The J17 Does Not Power On, or Backlight
Does Not Light
Check the battery. Install a fresh battery, and ensure
that it is seated correctly. If the optional AC adapter is
available, use it to connect the J17 to a power
source.
The Display Shows Err
The word Err (error) appears on the display when
you press a button that is not appropriate with the
sensorĆhead attached to the J17, or not appropriate
in the chosen operating mode.
Measurements are Inaccurate
If measurements taken with the J17 are inaccurate or
inconsistent, check the operating setup:
H Connect the sensorĆhead to the J17 before
powering on. If not, turn the J17 off, then turn it
back on. The J17 will load data from a sensorĆ
head at powerĆon.
H Make sure that the sensorĆhead is positioned so
that the measurement field is entirely filled. This is
important for luminance, radiance, and chromaĆ
ticity measurements.
H Make sure that the area being viewed by the
sensorĆhead is uniformly illuminated. This is
important for luminance, radiance, and chromaĆ
ticity measurements.