EL3000
CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D
25
Magnos28
Sample gas
Sample gas inlet conditions
DANGER
Explosion hazard
Explosion hazard when measuring ignitable gas / air or
gas / oxygen mixtures
• The gas analyzer may not be used for the measurement of
ignitable gas / air or gas / oxygen mixtures
Magnos28 – sample gas input conditions
Temperature
• The sample gas dew point should be at least 5 °C below the temperature
throughout the sample gas path. Otherwise a sample gas cooler or
condensate trap is required.
• When there is a direct connection to the sample chamber, the maximum
sample gas dew point is 55 °C.
• Water vapor content variations cause volume errors.
Designation of gas connections
The analyzer is operated under atmospheric pressure; the sample gas outlet is
open to atmosphere.
Internal pressure drop:
< 5 hPa at standard flow rate of 60 l/h.
Permissible absolute pressure range: 800 to 1600 hPa.
Operation under lower absolute pressure
(e.g. at altitudes above 2000 m) on
request.
Operation under higher pressure:
A pressure sensor is required to
compensate for pressure influences.
Absolute pressure ≤
1250 hPa:
An optional internal pressure sensor can
be connected to the sample gas path.
Absolute pressure ≥
1250 hPa:
An external pressure sensor must be
connected to the sample gas path. The
pressure compensation must be
calculated externally.
The analyzer module is function-tested for 5000 hPa internal pressure without
damage.
Flow rate
30 to 90 l/h;
measuring ranges ≤
0 to 3 vol % O
2
: 60l/h
For highly suppressed measuring ranges
and measuring ranges of ≤
0 to 3 vol %
O
2
, changes of the sample gas flow
should be avoided.
Corrosive gases
If the sample gas contains Cl
2
, HCl, HF or other corrosive
components, the analyzer may only be used if the sample gas
composition has been taken into account by the manufacturer
for the configuration of the analyzer. If the sample gas contains
NH
3
, FFKM75 gaskets must be used; in this case, the integral gas
feed cannot be connected to the analyzer. The pressure sensor
must not be connected to the sample gas path.
Flammable gases
The analyzer is suited for measuring flammable gases in a non-
explosive environment.
Observe the special conditions when measuring flammable
gases, see
Special conditions for the measurement of
on page 41.
Pressure sensor
The pressure sensor is optionally installed in the gas analyzer,
see
on page 36.
The pressure sensor is connected to a connection socket via an
FPM tube.
For measurements in suppressed measurement ranges, the
sensor and sample gas outlet have to be connected to each
other via a T-piece and with the use of short conductors.
Make especially sure that the gas discharge line is as short as
possible or has a sufficiently large inside diameter (min. 10 mm)
in case of a larger length.
Gas connections
See
Gas connections Magnos28 (model EL3020)
on page 71 and
Gas connections Magnos28 (model EL3040)
on page 75.
