CIRAS-3 Operation Manual V. 1.09
101
Find Max C
Press
Find Max C (F3)
. This process determines the maximum CO
2
level that can be achieved with the
CIRAS-3. This should be performed prior to using “Approximate reference air” for CO
2
reference (See
for optimal control. Prior to starting this process, make sure that you have inserted a fresh
CO
2
cartridge and that all chemicals are fresh. Hit
Start (F2)
to begin the process.
This process is automated and you should see the CO2r value settle out just above 2000 µmol mol
-1
and
the message “… calibration in progress” just above the graph. The system will also perform and Auto
Zero. If this process is successful, you will receive a message as follows:
Press
OK
to accept and then
Back (F1)
. If you are not successful and you get a message that says it
can’t find Max C, check your chemicals again, tighten the CO
2
cartridge holder to ensure that the
cartridge was pierced when inserted and perform a new Max C. You can now proceed to
Settings (F2)
and select “Approximate reference air” if you want to use this option for
CO2 Reference
.
F1
F3
F2
F4
F6
F5
F7
F8
