LI-COR LI-3100C, Instruction Manual

Page: 33 / 50

Section 6.
Troubleshooting
The sections below define several potential problems and lists several possible causes
and their solutions.
Continuous spurious data accumulation
l
Lens cover has not been removed from the camera. Remove lens cover.
l
Camera is at the wrong location. Check the actual camera position as described
in
Changing measurement resolution on page 4-1.
l
Fluorescent tube not illuminated. Press "lamp start" switch and hold for 2 or
more seconds.
l
Fluorescent tube is cold. Wait until it warms up.
l
Possible debris within the fluorescent tube. Remove the tube and perform the
procedure in
Voltage selector operation and characteristics on page 2-5. Altern-
atively, tip the instrument to about 45° by raising the front end to slide the
debris to the end of the tube.
l
Low line voltage. Check it and provide proper voltage to the instrument.
l
Belts are excessively dirty. Clean belts ( Cleaning the transparent belts on page 7-4).
l
Mirror, camera, or detector (reticon) need cleaning. Clean according Cleaning the
transparent belts on page 7-4 and following sections.
l
Obstruction in the optical pathway. Inspect the pathway and remove the obstruc-
tion.
l
Calibration screw adjusted to be excessively sensitive. Note the original position
of the screw and turn the screw counterclockwise until the displayed numbers
remain constant. Return to the original position. Perform calibration as
described in
Calibration on page 3-2. If counts continue at an unacceptable rate,
contact LI-COR.
6-1 LI-3100C Area Meter Manual