ABB AO2000 Series, Руководство по эксплуатации

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AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 53
Shut-off valve in the combustion gas supply line
A shut-off valve must be installed in the combustion gas supply line to in-
crease the safety in the following operating states:
•
Shutting down the gas analyzer,
•
Failure of the instrument air supply,
• Leakage in the combustion gas feed path inside the gas analyzer.
This shut-off valve should be installed outside the analyzer house in the vi-
cinity of the combustion gas supply (cylinder, line).
ABB recommends the use of a pneumatic shut-off valve which is actuated by
the instrument air. This shut-off valve can be purchased from ABB: Part
number 0769440.
If a pneumatic shut-off valve of this kind cannot be installed, precautionary
measures must be taken, so that the overall status or the "failure" status of
the gas analyzer is monitored (see section "Fidas24: Troubleshooting" (see
page 335)).
Test gases
Zero calibration
Quality Synthetic air or catalytically purified air with an org. C
content of < 1 % span
Inlet pressure p
e
= 1000 ± 100 hPa
Flow rate 130 to 250 l/h
Span calibration
Components Sample component CH
4
: CH
4
in air
Sample component THC: C
3
H
8
in air or CH
4
in air
Substitute gas component (when configured per order):
CH
4
in air
Inlet pressure p
e
= 1000 ± 100 hPa
Flow rate 130 to 250 l/h
Converter effectiveness testing
Components CH
4
in air or C
2
H
6
in air (separate test gas containers),
connection via bypass
Inlet pressure p
e
= 1000 ± 100 hPa
Flow rate 130 to 250 l/h
NOTE
The notes for calibrating (see page 241) must be considered.
Gas connections
see section "Fidas24: Gas connections" (see page 83)