Temporary Fix for a Bad IR Source
The infrared (IR) source for the LI-8xx series analyzers has an operational life of better than 20,000 hours, or about two years of continuous use. The IR source is essentially an incandescent light bulb, and fails as a result of the filament thinning with use as it burns away. Eventually the filament becomes thin enough that it cracks and breaks, at which point the source no longer works.
The permanent fix for a failed source is to replace it with…