TARGAS-1 Operation Manual V. 1.02
42
The status of ‘
Z 22
’ means the TARGAS-1 is performing a zero. The number is how many seconds it will
take to complete the sequence. A normal zero starts at 35 seconds. During a Zero, the CO
2
and H
2
O
values are displayed as 0 as the readings are not valid during the Zero sequence.
At the completion of the warm-up and the first Zero, valid readings are displayed.
Measure Screen 1
CO2r
CO
2
Reference (ppm)
•
This parameter is user adjustable from 0 to ambient
CO2a
CO
2
Analysis or sample (ppm)
CO2d
CO
2
Differential (ppm)
H2Or
H
2
O
Reference (mb)
•
This parameter is user adjustable from 0 to ambient
H2Oa
H
2
O
Analysis or sample (mb)
H2Od
H
2
O
Differential (mb)
PARe
PAR External (
μmol m
-2
s
-1
)
PARi
PAR Internal (
μmol m
-2
s
-1
)
•
This parameter is user adjustable up to 2500
μmol m
-2
s
-1
if a
light unit is used
Flow
Cuvette Flow Rate (cc/min)
•
This parameter is user adjustable from 200-500 cc/min and it is
associated with the flow of air to the leaf cuvette. The cuvette
flow rate should always be at least 100 cc/min higher than the
sample flow rate (see Sample Flow Setting on page 63).
•
The recommended flow rate is 250 cc/min. However, the
cuvette flow rate can be increased if you are working with
healthy plants and expecting higher rates of photosynthesis. It
can be reduced if you are expecting lower rates of
photosynthesis or if the leaf sample is small and not filling the
entire chamber window. Note that lower cuvette flow rates will
result in longer equilibration times so be a bit more patient
before recording a measurement.
Main Button
The Main screen is displayed when this button is selected. See Direct
Link Settings on 49.
Right Arrow
Selects the next measurement screen (Measure Screen 2).
