2) On the
Units Conversion
window, make sure
Apply units to the next
recorded block
and
Apply units to all blocks
are selected in the menu under
the displayed graph on the left side of the window by putting a check mark in
the boxes next to each statement.
3) Move the two left hand cursors to the flat line area where room air values were
recorded. Leave a space between the cursors so that you have an average
value being calculated while room air was moving into the GA-200 gas
analyzer.
4) Move the two right hand cursors to the flat line area where the gas sample
values were recorded. Leave a space between the cursors so that you have an
average value being calculated while the gas sample was moving into the GA-
200 gas analyzer.
5) Notice that the voltages from the positions between the cursors are
automatically entered into the value equations. Enter the two concentrations of
carbon dioxide measured from the two samples in the corresponding boxes on
the right side of the conversion equations.
•
Using room air, the concentration of CO
2
= 0.04%.
•
The second gas concentration will be the one from the gas cylinder.
Generally a 5% CO
2
concentration is recommended.
6)
Enter the name of the units,
%
, in the box below the concentrations.
7)
Click
OK
.
The Advanced Units Conversion dialog window with the voltages between the
cursors set to equal the concentrations used in calibration.
8) Repeat Steps 1 through 5 on the
Expired O2 Concentration (%)
channel.
•
Room air = 20.9%
•
Second gas concentration will be the one from the gas cylinder. Generally a
12% O
2
concentration is recommended.
GA-200 Gas Analyzer
iWorx Systems, Inc.
www.iworx.com
