CIRAS-3 Operation Manual V. 1.09 107 support@ppsystems.com
6. Under Internal PAR calculation, compare the “Corrected PAR target” to the “Observed PAR”
value. If the values are similar (± 2%), then there is no need to recalibrate. If the values are
outside this range, press Calibrate Internal Sensor (F3).
7. A new calibration factor (New factor) will be displayed and the “Observed PAR” should now
match the “Corrected PAR target”.
If you are unsure about your calibration, you can always press Restore Original Calibration (F7) to
restore the original factory calibration factors.
Diagnostics
Press Diagnostics (F6). The CIRAS-3 contains numerous sensors to measure CO
2
, H
2
O, leaf
environment, signals from external probes and gas flow through the instrument. The Diagnostics
function collects the signals from each of these sensors and summarizes them. This information is
extremely valuable in troubleshooting systems remotely and can be compared with factory records to
identify any minor or major changes in the system.
IRGA (F2)
Press IRGA (F2) to view readings associated with the IRGAs.
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