LI-COR LI-800 Instructions Manual

Source, detector, and optical path replacement
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Source, Detector, and Optical Path Replacement

Instructions for the LI-800, LI-820, LI-840, and LI-8100
The LI-800 (discontinued), LI-820, and LI-840 Infrared Gas Analyzers and the LI-8100 Automated Soil CO
common optical bench configuration; the source and detector on this optical bench can be easily replaced should they fail. These
instructions detail how to change out the source, detector and/or optical bench on any of these four instruments. There is also a
discussion about how to adjust the calibration coefficients and check the linearity of the analyzer's response (LI-840 and LI-8100
only) at the end of this instruction sheet. Check the table below to make sure that you have the correct replacement part(s) for your
instrument, and then proceed to the appropriate section for installation instructions.
A Phillips head screwdriver and a 1/2" open end wrench are the only tools needed to replace the source and/or detector in all instru-
ments.
LI-800 GasHound CO
Analyzer
2
LI-820 CO
Analyzer
2
LI-840 CO
/H
O Analyzer
2
2
LI-8100 Automated Soil CO
Part Number
Description
800-902
Source
800-903
Detector
800-904
Path 14 cm
800-905
Path 5 cm
800-906
Detector
8100-902
Source
LI-800 GasHound CO
The LI-800 Replacement Detector retains a default configuration for compatibility with earlier versions of the embedded software.
LI-800 embedded software versions 1.0 and 1.1 are compatible only with the PC Communications Software versions 1.4 and below
(contact LI-COR to upgrade your embedded software). The embedded software version number is printed on a label on the chip
located between the inlet and outlet tubing to the optical bench. To determine which version of the PC Communications Software you
are using, simply start the LI-800 program and view the title bar. If your LI-800 has embedded software version 1.0 or 1.1, proceed
with the instructions below, ignoring Step 11.
1.
Turn the LI-800 off. Let the optical bench cool for about 10
mintues. Loosen the six screws on the LI-800 top panel and
remove the cover.
2.
Unscrew the tube retaining nuts on the inner air port fittings.
Remove the tubing from both air ports. Leave the tubing
connected to the source and detector housings.
3.
There are ribbon cables (Figure 1) connected to the circuit
boards on the source and detector housings. Pull straight out
on the connector that is attached to each ribbon cable. The
optical bench can now be removed from the foam casing.
Flux System
2
LI-800
Analyzer Source/Detector/Optical Path Replacement
2
LI-820
X
X
X
X
X
X
X
X
Ribbon cable
connector
1
Flux System share a
2
LI-840
X
X
X
1
Source
Detector
5 cm bench
connector
LI-8100
X
X
X
Ribbon cable
connector
Air tube
fittings

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Summary of Contents for LI-COR LI-800

  • Page 1 To determine which version of the PC Communications Software you are using, simply start the LI-800 program and view the title bar. If your LI-800 has embedded software version 1.0 or 1.1, proceed with the instructions below, ignoring Step 11.
  • Page 2 Software program (versions 1.5 or higher), and press the Configure button. Press the Reset LI800 button (Figure 5). This sets the LI-800 parameters back to the default values, and loads the calibration polynomial LI-800 GasHound Alarms: coefficients. Controls: ✔...
  • Page 3 LI-820 CO Analyzer Source/Detector/Optical Path Replacement The LI-820 CO Analyzer has a standard 14 cm optical bench for making CO measurements to 2,000 ppm. An optional 5 cm optical bench can be installed to obtain a resolution of up to 20000 ppm. Please note that early versions of the instrument (embedded) software (<1.0.5) had a problem related to automatic loading of the calibration coefficients when switching from the long (14 cm) optical bench to the short (5 cm) optical bench, and vice versa.
  • Page 4 Locate the 2-pin link labeled LK3 on the LI-820 circuit board; it is located near the optical bench, just above the LI-COR logo, as shown in Figure 1. Note that there may or may not be a black connector on one of the pins at LK3.
  • Page 5 LI-840 CO O Analyzer Source/Detector/Optical Path Replacement Turn the LI-840 off and remove the power source. Allow the Source Detector instrument optical bench to cool for about 10 minutes. Loosen the Pre-formed six screws on the LI-840 top panel and remove the cover. tubing Unscrew the tube retaining nuts on the inner air port fittings with a Tube retaining...
  • Page 6 LI-8100 Automated Soil CO Flux System Source/Detector/Optical Path Replacement NOTE: Make sure that you are properly grounded to avoid any electro-static discharge events that can damage the internal Remove the 2 components. Balston filters and discard. Power the instrument off and remove the battery or other external power source.
  • Page 7 CalAdjust.exe can be used to adjust the linearity; this program can be found on the CD that shipped with your instrument, or can be downloaded from LI-COR’s web site; go to the LI-8100 Product Page and click on Software Downloads in the lefthand bar.
  • Page 8 ● ● 4421 Superior Street P.O. Box 4425 Lincoln, Nebraska 68504 ® ● ● International: 402-467-3576 FAX: 402-467-2819 North America: 1-800-447-3576 In Germany - LI-COR GmbH: +49 (0) 6172 17 17 771 ● ● envsales@licor.com envsupport@licor.com www.licor.com ACU-101, Rev. 2...

This manual is also suitable for:

Li-820Li-840Li-8100

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