CI-340 Operation Manual
CID Bio-Science
1554 NE 3
rd
Ave
Camas, WA 98607, USA
Phone: +1 (360) 833-8835
Fax: +1 (360) 833-1914
[email protected]
www.cid-inc.com
14
To change the atmospheric pressure (ATM) value:
S
croll to choose the “Calibrate ATM Pr” under the “ENTER to select” function.
Enter the desired ATM value in K Pa. Press
to accept the entered value or
to abort
the process, and continue to another step.
Flow Rate
The CI-340 is capable of maintaining a steady airflow once the unit begins taking measurements. After
the initial warm-up time (one minute), the instrument will generate the entered flow rate to regulate
the accuracy of the measurements. The instrument is capable of automatically controlling the flow rate
from 0.2 ~ 0.999 lpm. Flow rates of 0.3 lpm give increased accuracy to photosynthesis measurements
unless very active leaves are being measured.
Figure 5: Flow meter setup to measure flow rate.
The flow meter is calibrated by the manufacturer but can be calibrated again by the user. Suggested
calibration schedule is once every six months. Scroll to choose
the “Calibrate flow rate” under the
“ENTER to select” function.
ENTER to select Calibrate flow rate
The instrument will briefly run through stabilizing steps and then ask the user to adjust the flow, using
the
keys for major changes or the
keys for minor changes, over steps from .2 to
1 lpm. For calibration, the flow
MUST
be measured by the calibrated external flow meter at the port on
the end of the instrument where the leaf chamber plugs in (upper left part as you read the keypad). For
this calibration, the flow rate is measured at the input to the leaf chamber (see figure 5-0). A well-
calibrated flow meter with little backpressure should be used as the standard. If for any reason an error
was made during the calibration procedure pressing the
key will also return back to the
beginning of the flow calibration procedure without saving any changes made. Once the calibration
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