23
3 Operation
The device checks the concentration at the start of the analysis
and prevents the analysis being carried out if the concentration
is too low.
Gas sample
concentration
Analysis
is …
Device response
> 1 % vol.
Definitely
possible
Analysis can be carried out
1 % vol. – 0.5 % vol. Technical-
ly possi-
ble
Analysis can be carried out,
but
Ethane analysis critical
note appears
< 0.5 % vol.
Not pos-
sible
Analysis cannot be carried
out because
Take sample
symbol is not displayed
Displayed measurement values
In
measuring mode
, the device displays the actual concentra-
tions (fig. 9).
During the
analysis
, the device automatically dilutes the gas
sample to 1 % vol. to ensure optimal utilisation of the semicon-
ductor sensor. This means:
●
The concentration ratios of all components of the gas sample
are retained.
●
The maximum concentration of a gas component is 1 % vol.,
even if the actual concentration in the gas sample is higher.
In the mode of curve, the maximum peak may be cut off as
necessary (fig. 12 right).
Number of measurements
Always carry out 2–3 measurements in the same location to
obtain certain results. Observe the information on evaluation in
