CIRAS-3 Operation Manual V. 1.09 174 support@ppsystems.com
Cuvette % Rel Humidity > 70%
The RH% is getting high in the cuvette and we
recommend drying the air further to keep levels
below 70%.
CO2 Concentration Out of Range On
Stored Diff-Bal [85]
2
range is outside 10 µmol mol
-1
during
stored Diff Bal routine. Abort and try again. If
problem persists contact PP Systems.
2
O Concentration Out of Range On
Stored Diff-Bal [86]
2
O range is outside 0.5 mb during stored Diff
Bal routine. Abort and try again. If problem persists
contact PP Systems.
Analysis/Reference Pressure Difference
> 20mb [87]
Restriction on the reference or analysis gas circuit.
Check all gas connections and look for kinks or to
see if a connection has been broken.
Time Out on Diff-Bal [88]
The CO2r or H2Or concentration is fluctuating too
much during DIFF BAL and the system is unable to
achieve a good fit. Perform manual Zero (Z-Diff Bal
F7) > Zero) and Diff Bal (Z-Diff Bal F7) > Diff Bal).
If you are operating in “Manual” mode for Zero and
Diff Bal, we recommend changing this to Automatic.
2
The DIFF BAL value for CO2 is > 10 ppm. Typically
this is due to inaccurate recalibration or deterioration
of the internal sample cell due to dust, dirt, water. It
might just be a transient message that disappears
and if it does you are ok. If the message does not
disappear after 5-6 seconds perform a manual Diff
Bal (Z-Diff Bal F7) > Diff Bal). If problem persists
contact PP Systems. Also ensure that all desiccants
are fresh and that the absorber columns are firmly
seated in their respective manifolds.