LI-COR LI-6800 User manual

LI-6800 Multiphase Flash Fluorometer
The Multiphase Flash™ Fluorometer is used to measure gas
exchange and chlorophyll fluorescence from leaves. It can
also function as a basic light source. Remove any currently-
installed chamber prior to installing the fluorometer.
Removing a chamber
Caution: Power off the
instrument before following
these procedures.
1Remove the connector
cover from the bottom of
the head (see the
instruction manual).
2Unplug the light sensor
cable and temperature
thermocouple cable from
the cable bulkhead.
3Open the chamber and remove the two latch screws.
4Completely loosen both of the chamber screws
(about 9 revolutions).
5Remove the chamber.
Installing the fluorometer
The Multiphase Flash™ Fluorometer and the chamber latch
both attach to the head with two screws.
Caution: Power off the instrument before following these
procedures.
1While the chamber is removed from the head:
Check the Chamber O-ring
for damage. Replace if
needed. There is an
extra in the spares kit
(part number 192-
14438).
Check the Chamber
Electronics Gasket for
damage. Replace if damaged (part number 6568-
327).
Inspect the Head Air Filters and Dust Trap. Clear any
dust or debris, and replace any damaged filters (see
Replacing the head filters in the instruction manual).
Inspect the flexible ducts on the lower chamber.
Replace them if they are visibly damaged (this
should rarely happen, but see Replacing the
chamber ducts in the instruction manual for
details).
2Hold the fluorometer chamber in position, with the
latch springs up toward the handle, and tighten the
two captive chamber screws.
Make them snug—turn each screw until it stops (8 to
9 revolutions), and then just a little bit more. If you
have a torque screwdriver, tighten them to 2.5 N·m
(22 inch lbs).
3Install the chamber latch screws.
With the latch open, tighten the screws until they are
snug. If you have a torque screwdriver, tighten them
to 1.1 N·m (9.4 inch lbs). Double check the tightness
of each screw.
4If you unplugged the light sensor cable, install the
light sensor connector to the connection labeled PAR.
5Install the leaf temperature thermocouple connector
to the connection labeled T1. Install the connector
cover.
6Plug the connector into the console.
The fluorometer cable and head cable can be plugged
into either Head (1) or Head (2) connector. The
connectors are interchangable.
Installation Guide
1

7Slip the cable into the head cable bundle and press the
cable into the clasp.
8Power the instrument back on.
9Verify that the chamber is sealed and that the
software recognizes it.
Do the leak test under Startup > System Tests > Chamber
Leak. Check to see that the chamber is recognized
under Constants > System Constants > ChType.
Warning: The light sources for this
product can emit potentially
hazardous optical radiation (RG-2
CAUTION POSSIBLY
HAZARDOUS OPTICAL RADIATION EMITTED FROM
THIS PRODUCT), in excess of the Exempt Risk Group.
Potential risk depends upon how one uses and installs
this product. Do not operate the light source while
detached from the chamber. Do not look directly into
the light source under any circumstances. Operate the
light sources with direct access to ambient air for cooling.
Do not use the product in any manner not described in
the manual.
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