Section 4.
Troubleshooting
In this section, we describe how to identify some potential problems. If you can't
find a solution here, contact your local distributor or LI-COR technical support for
more help.
Instrument will not power on
Power supply adequate? The power supply should source at least 1.2 amps at 12
VDC (minimum of 14 watts during warmup).
Blown fuse? The instrument can be powered from the power jack or pins one and
two on the terminal strip. Each connection has its own fuse.
l
If you are unable to power on the instrument using the jack, but can power it on
using the terminal strip, you probably have a blown power jack fuse.
l
If the opposite is true, you probably have a blown terminal strip fuse.
l
If you can't power it using either connection, you may have blown both fuses.
Check the resistance across the fuse contacts using an ohm meter. A reading of 0
means that the fuse is good; a reading of 1 indicates that the fuse is blown.
See Replacing a fuse on page5-6 for complete instructions.
Unable to span or zero the instrument
Dirt in the optics? If the optical cell becomes contaminated, the instrument will drift
in either the zero or span.
See Cleaning the optical bench on page5-4 for complete instructions.
4-1Using the LI-830 and LI-850 Gas Analyzers
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