32 EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. C
… 3 Preparation for Installation
… Fidas24
Test gases
Test Gases for Zero Calibration
Nitrogen, Quality 5.0, synthetic air or catalytically
cleaned air with an organic C < 1 % MBU
130 to 250 l/h
Test gases for endpoint calibration
Sample component or substitute gas component
in nitrogen or synthetic air with concentration
adjusted to the measuring range
130 to 250 l/h
Zero point offset
If the zero point gas is not completely free of hydrocarbons
(even purified nitrogen contains fractions of hydrocarbons),
negative measured values may be displayed in small measuring
ranges.
In this case, the sample gas contains a lower proportion of
hydrocarbons than the zero point gas.
Note
The calibration information under Calibration in the operating
instruction must be taken into account.
Gas connections
See sections Gas connections and electrical connections
Fidas24 (model EL3020) on page 80 and Gas connections and
electrical connections Fidas24 (model EL3040) on page 81.
Sample gas input and output conditions
Analyzers
Uras26 on page 16
Magnos206 on page 20
Magnos27 on page 24
Caldos27 on page 28
Oxygen sensor
Flammable gases
The oxygen sensor may not be used for the measurement of
flammable gases.
Additional conditions
The H
2
O dew point of the sample gas must be at least 2 °C.
The oxygen sensor may not be used if the sample gas contains
the following components:
H
2
S, compounds containing chlorine or fluorine, heavy
metals, aerosols, mercaptans, alkaline components.
Integrated gas feed
Flammable gases
If the gas analyzer is equipped with the integrated gas feed, it
must not be used for the measurement of flammable gases.
Note
Integrated gas feed can be used as an option in the EL3020
model. It cannot be used in the EL3040 model and not together
with the Limas23, ZO23 and Fidas24 analyzers.
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