Technical information

TROUBLESHOOTING
3/31/2008 Rev. 4.3 12-2
• The sample(s) may not be a good source.
• Ambient, internal operating temperatures may be too extreme. Check with the instrument
accessory specifications for ideal operating conditions.
Analyzer displays zero values for CO
2
, H
2
O concentrations . . .
• Check for proper calibration(s). Using a Di-nitrogen (N2) source for both the CO
2
and
H
2
O concentration is highly recommended for the 0-ppm source. Using a 300- or 600-
ppm source is highly recommended for the known source of CO
2
; a known source
between 1 ~ 7.5 kPa of water vapor pressure is required.
• The sample(s) may not be a good source.
If at the end of setting photosynthesis parameters, the “Exit to Quit” screen remains on longer
than 30 seconds, it is possible that the flow calibration is not calibrated properly.
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