AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 343
Gas analyzer shutdown and packing
Gas analyzer shutdown
Gas analyzer shutdown
In the case of a temporary shutdown:
1 Turn off the sample gas supply and reference gas supply, if applicable.
2 Purge the gas lines and gas feed paths in the analyzer module with dry
fresh air or nitrogen for at least 5 minutes. Limas21 HW: Purge sample
gas feed path gas lines and gas feed paths in the analyzer module with
at least with clean and dust-free air for at least 1 hour.
3 Switch off the gas analyzer power supply.
In the case of a long-term shutdown, carry out the following in addi-
tion:
4 Remove the gas lines from the gas analyzer ports. Tightly seal the gas
ports.
5 Disconnect the electrical leads from the gas analyzer.
Fidas24: Gas analyzer shutdown
In the case of a temporary shutdown:
1 Turn off the sample gas supply.
2 Purge sample gas line with nitrogen for at least 5 minutes from the
sampling point.
3 Set the gas analyzer to standby operation (see page 277). In case of
corrosive and flammable gases set the gas analyzer to standby opera-
tion with detector purging.
4 Shut off combustion air supply and combustion gas supply.
In the case of a long-term shutdown, carry out the following in addi-
tion:
5 Shut off instrument air supply.
6 Switch off the gas analyzer power supply.
7 Remove the gas lines from the gas analyzer ports. Tightly seal the gas
ports.
8 Disconnect the electrical leads from the gas analyzer.
Fidas24: Gas analyzer restart
1 Feed in instrument air and combustion air and purge the gas analyzer
for at least 20 minutes.
2 Turn on the gas analyzer power supply.
3 Turn on the combustion gas supply and check the combustion gas
pressure.
4 Carry out a seal integrity test on the combustion gas line (see page 283).
5 Turn on the sample gas supply.
See also the instructions in the section "Fidas24: Gas analyzer start-up" (see
page 129).
Ambient temperature
Ambient temperature during storage and transport: −25 to +65 °C
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