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304
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Disassembly of the sample cell:
12
Hold the sample cell with 2 open-end wrenches (clamp 1 open-end
wrench in the vise, in order to fix the sample cell in position) and un-
screw the two beam guide tubes
10
and
11
.
Take care that the cell windows do not fall out and that they are not
damaged!
13
If the cell windows are stuck to the O-ring seals, they must be removed
by flushing the sample cell with compressed air. Wear safety glasses
when working with compressed air! Point the opening of the sample cell
away from the body!
1
Insert a soft paper towel into the aperture of the sample cell to col-
lect the cell window.
2
Seal the opening of a sample gas tube with a plug and pressurize the
other sample gas tube with compressed air (p
e
≈
100 kPa = 1 bar).
The cell window is thereby removed from the seal. Collect the cell
window in the paper towel.
Fluid can escape from the sample cell! Follow the relevant safety
regulations!
3
Seal the opening of the sample cell with a plug and pressurize the
sample cell with compressed air once again. The other cell window is
thereby removed from the seal. Collect the cell window in the paper
towel.
14
Remove the 2 O-ring seals 22.1x1.6 FFKM70 dispose with a pair of twee-
zers Also remove and dispose of the 2 O-ring seals 28x2 FKM80.
The O-ring seals may not be used again! Always replace them with new
seals!
Cleaning the sample cell and sample gas tubing:
15
Clean the sample cell with a warm detergent/water mixture. If neces-
sary, use a circular brush with plastic bristles.
16
Clean the sample gas tubing in the same way. To do this, use a spray
bottle to rinse the sample gas tubing with the detergent/water mixture.
In the case of heavier contamination, the following can also be used as a
cleaning agent:
•
organic solvents or
•
in turn, diluted soda lye, water, diluted nitric acid for neutralization,
water.
Be sure to follow the appropriate instructions for use and disposal when
using acids, alkalis or solvents.
17
Check that the contamination has been removed.
18
Rinse the sample cell and tubing very thoroughly with deionized water
until the detergent is completely removed. Finally, rinse the cell with
ethanol until all water is removed.
19
Dry the sample cell and sample gas tubing with oil- and dust-free air
(30 to 100 l/h).
Clean the entire sample gas line system in the same way!
Содержание AO2000 Series
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