GEM5000 gas analyzer 5K-MNL-GEM5000
Gases Defined with 0.0 will be spanned
to zero when the gas mix is used
Gas Defined with “Nothing specified”
It is important to note that a 0.0 is different than Nothing defined. In the above example for
Fresh Air, only CO2 is not defined or has “Nothing specified”. What this means is that when
the mix named Fresh Air is applied to the instrument you will Zero the CH4, O2, CO, H2S &
H2 Channels. You will Span Oxygen to 20.9 percent. Carbon Dioxide CO2 will not be touched
when Fresh Air is applied. This distinction is important because as gas mixes are defined you
may choose to omit defining a constituent as 0.0 if you want to span only and not Zero a
particular gas. The following example will describe this in a step-by-step single bottle gas
check/calibration sequence.
Single Bottle Calibration
The following will walk through a typical calibration using Air and a single bottle of 50%
Methane / 35% Carbon Dioxide / Balance Nitrogen.
The three simple steps to performing this calibration are:
Apply Fresh air, Zero channels
Apply Span to CH4, CO2, Zero O2
Apply Span for O2
To begin, press the Menu Key on the instrument. From the Operations Settings Menu,
press 2 for Gas Check. From the Gas Check Screen, press 1 to perform the Gas Check. The
Select Gas Mix screen will appear.
These gases may
vary depending upon
your instrument’s part
number.
This example uses a
GM5K0AC0-200-L
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