282
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
CAUTION!
The heated sample gas connection is hot (approx. 180 °C)! Allow the sam-
ple gas connection to cool down after switching off the power supply
(approx. 30 minutes).
1
Turn off the sample gas supply to the analyzer module.
Switch off 115/230-V-AC power supply of the gas analyzer and heater as
well as if necessary, the separate 24-V-DC supply of the analyzer module.
2
Unscrew exhaust pipe
2
from the exhaust air outlet
1
(key size 12 mm).
3
Unscrew air jet injector from the exhaust air outlet
1
(key size 14 mm).
4
Clean air jet injector in ultrasonic bath. Use aqueous cleaning agent (e.g.
Extran).
5
Replace O-rings
3
,
4
and
5
with new O-rings.
NOTE: When cleaning the air jet injector always replace all three O-rings.
Contaminated or damaged O-rings impair the suction performance of
the air jet injector; this may result in the failure of the Fidas24.
Slightly lubricate all three O-rings with high temperature grease (part
no. 772341) before mounting them.
6
Screw air jet injector
6
into the exhaust outlet. Make sure that the
O-rings are seated correctly.
7
Screw the exhaust pipe
2
onto the
1
exhaust air outlet.
8
Reconnect the sample gas supply to the analyzer module.
9
Switch on the power supply.
10
Check output variables of the internal pressure regulator for the supply
gases and adjust if necessary (see section "Fidas24: Gas analyzer
start-up" (see page 129)).
11
Calibrate the gas analyzer at the end of the warm-up phase.
