EC155 CO
2
and H
2
O Closed-Path Gas Analyzer
11
For applications using the EC155 with the CSAT3A sonic anemometer, certain
environmental conditions should be considered when choosing an appropriate
installation configuration. If the EC155 is coupled with a CSAT3A sonic
anemometer and is to be used in a marine environment, or in an environment
where it is exposed to corrosive chemicals (for example, the sulfur-containing
compounds in viticulture), attempt to mount the EC155 with CSAT3A in a way
that reduces the exposure of the sonic transducers of the CSAT3A to saltwater
or corrosive chemicals. In marine or viticulture environments, the sonic
transducers are expected to age more quickly and require replacement sooner
than a unit deployed in an inland, chemical-free environment.
Other mounting arrangements are acceptable, but the analyzer
must be upright. The bottom of the analyzer has two #6-32, UNC-
thread mounting holes for applications that do not use the EC155
mounting platform.
For the sample cell with vortex intake (sample cell serial numbers 2000 and
greater) and updated CSAT3A (CSAT3A serial numbers 2000 and greater),
(p. 11)
, before
mounting the analyzer. For the original versions of the sample cell and
CSAT3A (sample cell and CSAT3A serial numbers less than 2000), skip
(p. 11)
.
6.1 Preparation of Vortex Intake
To prepare the vortex intake for operation, install the bypass tube and filter
assembly.
1.
Locate the bypass tube and filter assembly packed inside the EC155
carrying case or shipping box. The assembly is shown in FIGURE
2.
Remove the 3/8-inch Swagelok plug from the fitting labeled
Pump
at the
back of the EC155 sample cell and attach the assembly’s 3/8-inch
Swagelok fitting as shown in FIGURE
Overtightening Swagelok fittings can strip threads and result
in leaks. If a fitting has been assembled previously such as
in the case of the bypass tube and filter assembly, tightening
the fitting no more than a quarter turn past finger-tight is
adequate.
3.
Insert the open end of the bypass tube into the open hole of the vortex’s
bypass tubing sleeve as shown in FIGURE
. Push the tube into the
sleeve about 2.5 cm until it hits the end of the vortex chamber.
4.
Push the tube into the clip on the side of the sample cell to hold it securely
in place as shown in FIGURE
NOTE
CAUTION
Содержание EC155
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