Leaf Porometer Operator’s Manual
4. Sensor Head Calibration
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12) Calibration Measurements
Once the sensor head is attached to the calibration plate,
the Leaf Porometer will automatically sense the calibration
plate and begin the first calibration measurement.
Each calibration measurement will take 30 seconds. The
indicator bar at the bottom of the screen and timer at the
top right of the screen indicate the status of the calibration
measurement. Once the measurement is finished, you will
be prompted to Equilibrate Sensors (#10 above) and then
Attach Sensor Head (#7 above). This will begin another
calibration measurement.
The leaf porometer will continue to take calibration mea-
surements until three consecutive measurements are all
within 7.5% of each other. This ensures that the porometer
is well hydrated, and has stable readings. Normally, the cali-
bration should end after 3-5 calibration measurements are
performed. The routine will continue for a maximum of 10
measurements. If stable readings haven't been achieved in
