ABB EL3000 Series, Руководство пользователя

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EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. B 35
Combustion gas
Quality Hydrogen (H
2
),
Quality 5.0
H
2
/He mixture
(40 %/60 %)
Inlet pressure p
e
= 1200 ± 100 hPa p
e
= 1200 ± 100 hPa
Flow ≤ 3 l/h approx. 10 l/h
NOTE
H
2
/He mixture may only be used if the gas analyzer has been ordered and
supplied in the execution specified for this. If the gas analyzer has been sup-
plied in the execution for H
2
/He mixture, H
2
may not be used as a combus-
tion gas under any circumstances. This would cause overheating and there-
fore the destruction of the detector!
CAUTION
A flow restriction and a shut-off valve must be installed in the combustion
gas supply line by the end user, so that safe operation of the gas analyzer
is ensured.
Flow restrictor in the combustion gas supply line
The combustion gas flow must be restricted to a maximum of 10 l/h of H
2
or
25 l/h of H
2
/He mixture. Suitable measures outside the gas analyzer must be
provided by the end user for this purpose.
ABB recommends the use of a bulkhead fitting with an integrated flow re-
strictor which must be installed in the combustion gas supply line. This
bulkhead fitting can be purchased from ABB:
 Combustion gas H
2
: Part number 8329303,
 Combustion gas H
2
/He mixture: Part number 0769359.
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.