QED LANDTEC GEM5000 - Page 101

GEM5000 Gas Analyzer
Page 101 of 102
NO
2
Nitrogen dioxide
Operating language
The operator can choose the default operating
language for the analyzer. Choices are English,
German, Spanish, French and Italian.
PPM
Parts per million
Pump
Used to draw the gas sample from the sample
point to the analyzer.
Select the pump key on the analyzer to
activate.
ID
The user definable identification tag allocated to
a sample point.
Relative pressure
The pressure at the sample point ‘relative’ to
atmospheric (barometric) pressure.
Relative pressure transducer
The internal component used to measure the
relative pressure.
Residual N
2
The calculation for the residual N
2
used on the
latest version of the GEM5000 platform is as
follows:
Residual N
2
= Balance – (O
2
% x 3.76)
Where, Balance = 100% - (CH
4
% + CO
2
% +
O
2
%) and 3.76 is the ratio of O
2
to N
2
in
ambient air (79/21)
Sample tube
The tube used to obtain a sample of gas from
the sample point to the analyzer.
Span
The point at which the gas analyzer is calibrated
when a known quantity of the target gas is
present.
Span multi gas
Term by which the span calibration of the three
main gas channels is known. This option must
only be used when the calibration gas being
used is a combination of CH
4
CO
2
O
2
.
Technician ID
An alpha-numeric code tagged to each gas
reading. Facility only available via LSGAM. This
is an optional feature.
Temperature probe
External device used to measure the gas
temperature at the sample point.
This is optional.
Update site data
Enables the operator to answer pre-defined
questions relating to the site, environment etc.
These questions are defined via LSGAM
software.