AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 289
Optical alignment procedure
CAUTION!
Current-bearing components can be exposed when the covers or parts
are removed, even if this can be done without tools. Current can be pre-
sent at some connection points. All work on a gas analyzer that is open
and connected to power should only be performed by trained personnel
who are familiar with the risks involved.
1 Turn on the zero gas supply.
2 Open the 19-inch housing front plate or the wall housing cover.
3 Select the menu item Optical adjustm.
4 Select the Sample component to be measured in the rear detector (as
seen from the emitter).
5 Minimize the (zero gas) value displayed by turning the applicable beam
path aperture adjustment wheel 1 and. 2.
If the measurement value is much smaller than 1,000,000, then go to
Step 10.
If the measurement value is still greater than 1,000,000, then go to
Step 6.
6 Loosen the two emitter case mounting screws 3 and insert the emitter
wrench 6 in openings 4.
7 Turn the emitter case 5 until the displayed value is minimized.
(The minimum can be greater than 1,000,000.)
8 Tighten the emitter unit mounting screws 3.
9 Repeat steps 5 to 8 until a minimum value is displayed.
10 Close the 19-inch housing front plate or the wall housing cover.
11 If the emitter is replaced, perform a phase alignment (see page 290) for
all sample components.
If the emitter is not replaced, calibrate the zero and span points for all
sample components in the beam path.
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