METER SC-1 User Manual

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SC-1
Figure34 About screen
3.3.2 MODES
The measurement can be taken in two modes: Auto or Manual. For typical measurements on
plant leaves, Auto mode is strongly recommended.
Auto mode makes an accurate stomatal conductance measurement in 30 s. To do this, the
SC-1 takes the first 30 s of stomatal conductance data and applies a look-ahead algorithm
to predict the final stomatal conductance reading if unlimited time were allowed for true
steady state conditions to occur. The 30-s measurement duration ensures that stomatal
conductance does not change due to the presence of the sensor head. Auto mode also sets a
definite endpoint for the measurement and data can only be saved after that point.
Manual mode measures stomatal conductance continuously and directly from the RH
gradient between the two RH sensors (Section3.5). The real-time conductance measurement
can be saved at any time during a Manual mode measurement. Manual mode assumes that
a steady state is reached, and the user must determine at what point the readings have
stabilised enough to consider the measurement complete. Some common uses for Manual
mode are measuring dark conductance in plants and measuring conductance of static
conductance materials (e.g., fruit peels, waterproof fabric).
NOTE: Manual mode should only be used at low conductances (i.e., <100 mmol/[m
2
s]).
In Manual mode, there is no time limit for taking readings, and the elapsed time is displayed
directly below the system time (Figure35).
Figure35 Measurement tab in Manual mode

METER SC-1 Specifications

General

Brand	METER
Model	SC-1
Category	Measuring Instruments
Language	English