Geotech GA5000 - Page 112

OMGA5KN4.4 GA5000 gas analyser
Page 112 of 113  Copyright Geotech
Memory
Location where data and ID information is
stored. The analyser memory should not be
used as a permanent storage medium. Stored
data should be regularly transferred using the
GAM download software.
NO
2
Nitrogen dioxide
Operating language
The operator can choose the default operating
language for the analyser. 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 analyser.
Select the pump key on the analyser 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 GA5000 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 analyser.
Span
The point at which the gas analyser 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 Gas
Analyser Manager (GAM). This is an optional
feature.
Temperature probe
External device used to measure the gas
temperature at the sample point.