SICK EuroFID, Руководство по эксплуатации

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16 EuroFID · Operating Instructions · 8011094 V2.3 · © SICK AG
Important Information
1.4.3
Restrictions of use
Explosion protection
The EuroFID is not suitable for operation in potentially explosive atmospheres. Operation in
potentially explosive atmospheres requires additional safety equipment.
Properties of the sample gas

The EuroFID should never be used
– For measuring operationally explosive gas compounds
– For sample gas compounds which form an explosive mixture with air.

The sample gas should not contain substances which could chemically corrode the
components in contact with the sample gas (materials
→ P. 195, §16.7 ). Such
substances should also not be formed during combustion of the sample gas (in the FID
flame).

The sample gas should not contain any gas components which could condense in the
measuring system (temperature in the measuring system
→ P. 117, §11.10 ).

No solids should be formed during gas combustion.Solids in the gas path could
obstruct the measuring system.

If the “inline” type analyzer unit is installed: Do not exceed the following temperature
limits:
– Sample gas temperature at the gas inlet of the sensor tube: 350 °C (660 °F) max.
– Dewpoint temperature of the sample gas: 200 °C (390 °F) max.
Influence of oxygen (O
2
) and sulphur dioxide (SO
2
) in the sample gas
●
If the O
2
concentration in the sample gas fluctuates, the measured values can be
corrupted. The EuroFID is set at the works so that the measurement error is not greater
than 4 % of the measuring range end value.
●
If the following conditions apply at the same time in the sample gas:
– SO
2
concentration > 50 mg/m 3
– O
2
concentration < 15 percent by volume
then the measurement error in the measuring range tested for suitability (15 mg/m 3 C)
is higher than 4 % if H
2
is used as fuel gas. In such cases an H
2
-He mixture must be
used as a fuel gas for measurement in the validity range of the suitability test
(specification
→ P. 195, §16.6.2 ).
If the EuroFID is used for measuring combustible gases or for sample gases
which can form a combustible gas mixture with air, there is a potential risk of
explosion in the event of a defect in the internal gas paths (leakage). The gas
could ignite when it comes into contact with hot surfaces or the FID flame.
For such applications:

Check which regulations and laws apply at the installation site in such
cases.

Check whether additional safety equipment has to be installed (e.g.
housing enclosure and purging).
The EuroFID is configured and adjusted accordingly for such applications at
the manufacturer's works. For all other applications, H
2
is preferable as a
fuel gas.