ABB EL3000 Series Manual page 26

26
Test gases
Analyzer
Magnos28
Magnos28 with suppressed
measuring range
Magnos28 with single-point
calibration
Magnos28 with substitute
gas calibration
Pressure sensor
Gas connections
EL3000 CONTINUOUS GAS ANALYZERS
Test gas for zero-point calibration
and single-point calibration
Oxygen-free process gas
Test gas with O concentration near
2
the starting point of the measuring
range
Test gas with O concentration in an
2
existing measuring range or ambient
air. Same moisture content as pro-
cess gas.
Oxygen-free process gas or substi-
tute gas (O in N )
2 2
CAUTION
In order to avoid accumulations of explosive gas mixtures, do not use air
as a test gas for single-point calibration when measuring flammable gas-
es!
Dew point
The dew point of the test gases must be approximately the same as the dew
point of the sample gas.
NOTE
The notes for calibrating must be considered.
The pressure sensor is installed in the gas analyzer as an option. It is con-
nected to a connection port via an FPM tube.
With measurements in suppressed measuring ranges the connection of the
pressure sensor and the sample gas outlet are to be connected to each oth-
er via a T-joint and short lines.
Particular care should be taken that the gas discharge line is as short as
possible or – in the case of a greater length – has a sufficiently wide inside
diameter (at least 10 mm).
see sections
"Gas connections Magnos28 (Model EL3020)" (see page 71) and
"Gas connections Magnos28 (Model EL3040)" (see page 72)
| CI/EL3000-EN REV. B
Test gas for end-point calibration
Process gas with known O
tration
Test gas with O concentration near
2
the end point of the measuring range
–
Substitute gas, e.g. dried air
concen-
2