Test Gases - ABB EasyLine EL3000 Operating Instruction

116 EL3000 CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D
... 9 Calibration
... Calibration control
Wait until the warm-up phase has ended
Analyzer module may not be calibrated until the warm-up phase
has ended.
Duration of the Warm-up Phase
Analyzer Duration of the Warm-up Phase
Uras26 Without thermostat: approx. ½ h
With thermostat: approx. 2 h
Limas23 Approx. 2 hours
Magnos206 < 1 hours
Magnos28 < 5 h, The value may be elevated during first
commissioning or after a longer service life.
Magnos27 2 to 4 h
Caldos27 Approx. ½ h
Fidas24 Approx. 2 hours
approx. 2 h, see for detailed information ZO23 –
ZO23
Commissioning the gas analyzer on page 104.
Air pressure effect
The current air pressure must be taken into consideration during
the calibration.
• Air pressure correction is automatically performed when a
pressure sensor is fitted to the analyzer, see Pressure sensor
on page 36.
• In the case of analyzers without a pressure sensor, the
current air pressure must be entered via the 'Atmospheric
Pressure' menu before calibration, see Pressure correction
on page 194.

Test gases

DANGER
Explosion hazard
Explosion hazard due to the formation of explosive gas
mixtures when measuring flammable gases and connecting
oxygen-containing test gases (such as air).
• Before connecting an oxygen-containing test gas, the gas
path must be rinsed with an inert gas, such as nitrogen.
Observe the following safety instructions regarding
•
calibration.
Safety instructions regarding calibration
When measuring flammable gases, observe the following
instructions:
• When calibrating the analyzers, air must not directly be
connected as a test gas after operation with flammable
gases.
• Alternatively, where possible, use nitrogen as test gas for
calibration instead of air (for example, for zero point
calibration of Uras26 or single point calibration of
Magnos206 and Magnos28).
This must be particularly considered for automatically
controlled calibration processes, since no automatic purging
with an inert gas is possible.
Note
For the analyzers ZO23 and Fidas24, the instructions specified in
ZO23 – Checking the reference point and end point on page 134
or Fidas24 – Notes for calibration on page 136 must be
observed.
Dew point of the test gases
The dew point of the test gases must be approximately equal to
the dew point of the sample gas, i.e. it must be at least 5 °C
lower than the lowest ambient temperature in the entire gas
path.
Test gas flow rate
30 to 60 l/h, keep constant at ±5 l/h