Setup & Operation
2-1
2
2
Setup &
Operation
®
CO
2
/H
2
O ANALYZ
ER
Model LI-62
62
READY
ZERO
SPAN
CO
2
ON
OFF
FUNCTION
EEX,
ENTER
↓
↑
4
5
6
7
8
9
C
0
.
2
3
1
ZERO
SPAN
H
2
O
This section will describe the steps necessary for you to set up the hardware
and software in your LI-6262 to begin making measurements. Follow these
steps to configure your analyzer; where noted, the steps are described in
more detail in this and other sections.
2.1 Setup and Operation
1.
Install Gelman filters.
The Gelman filters are used externally, and must be inserted in the
Sample and Reference airstreams upstream from the analyzer. See
Section 2.3,
Gelman Filter Installation
below.
2.
Prepare a soda lime/desiccant tube, as described in Section 7.4, and
attach to the
SCRUBBER
holder on the back panel.
3.
Absolute or Differential mode operation?
The LI-6262 can be operated in absolute or differential mode. In
absolute
mode, the reference cell contains a zero concentration of CO
2
and H
2
O. The sample cell is connected to the unknown gas to be
measured. The signal from the sample cell is compared to the zero gas
reference signal to provide absolute measurements of CO
2
and H
2
O. In
differential
mode, the reference cell contains a non-zero gas of
known
concentration
. The difference between absorption in the sample cell
and in the reference cell is measured. Configuring the LI-6262 for
differential or absolute mode operation requires slightly different hose
connections; see
Absolute vs Differential Mode Operation
below.
4.
Turn the power ON.
The LI-6262 can be operated with AC or DC power. See Section 2.2,
Power On
below.
5.
Calibrate the analyzer as described in Section 4.
