LI-COR LI-840A - Features; Precautions

Features
The LI-840A is an economical, high performance, non-dispersive infrared gas analyzer designed
to be used for a wide variety of applications. Some of the LI-840A's important features include:
l A 14 cm (5.5") optical bench is used to obtain a CO
2
measurement range of 0-20,000 ppm
(parts per million, or µmol/mol) and an H
2
O measurement range of 0-60 mmol/mol.
l The optical bench is fully serviceable by the user; cleaning the optical bench is a simple pro-
cess, and does not affect the instrument's factory calibration.
l Simple Windows® software provides for easy user calibration and data output.
Precautions
l Avoid storing the LI-840A in humid conditions while powered off. Doing so can cause the
optical sensor to become saturated with humidity, which will temporarily affect meas-
urements when the instrument is removed from storage. See Storing the LI-840A on page5-7
for more details.
l The optical bench is maintained at a constant temperature of about 50 °C. Avoid direct expos-
ure to sunlight or extremely high temperatures that may elevate the temperature inside the
LI-840A case.
l The optical source is sensitive to vibration, and can be damaged by strong vibrations or jar-
ring. Do not drop the LI-840A or expose it to severe mechanical shock.
1-3Section 1. General Description
Section 1