EL3000
CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. C
107
Important instructions for measuring
combustion gases
Measures to take after each opening of the gas paths
within the gas analyzer
• If the sample gas path inside the gas analyzer has been
opened, leak tightness should be checked afterwards with a
helium leakage test for a leakage rate of < 1 × 10
–6
⋅
hPa l/s.
• As an alternative to the helium leak test, the pressure drop
method can be used, see
Checking gas path leak tightness
on page 105.
– For this purpose, a test pressure of pe ~ 400 hPa for a
test duration of 15 min should be applied.
Within this time, the pressure must not drop more than
1 hPa.
• Every time the sample gas path is opened, it needs to be pre-
rinsed before you power-up the power supply. That way, any
explosive gas/air mixture which might be present should be
removed.
– Purge gas: nitrogen
– Purge gas volume: 5 times the volume of the gas paths
– Purge gas flow rate: approx. 30 l/h
– Purge duration: at least 3 min
Important instructions for explosion-proof
design in degree of protection II 3G
Visual inspection
• If the viewing glass is damaged to the point that the IP65
housing protection is no longer met, the gas analyzer must
be decommissioned, secured against recommissioning and
repaired.
• If the housing is damaged by UV radiation to the point that
the housing protection IP 65 is no longer maintained, the gas
analyzer must decommissioned, secured against
recommissioning and repaired.
Replacing the battery
• The battery may only be replaced in a non-hazardous
atmosphere.
• Only the original battery may be used as a spare: lithium
button cell 3 V Varta type no. 6032.
