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WP
PotentiaMeter
4C
4. The Menus
time to come to vapor equilibrium, such as plant samples
and moist soil samples with water potential > -0.5MPa. In
this mode the WP4C will measure the sample, stop to dis-
play the water potential and sample temperature, then
begin another read cycle. Between samples, it will signal
you with the green LED flash, accompanied by the
beeper, if it is enabled. Some find it helpful to connect
their WP4C to a computer while in continuous mode in
order to log and store data over time. For instructions on
how to do this, see Chapter 8.
Fast Mode
In fast mode, the sample is measured only once. Read time
is typically 3-5 minutes. Readings are less precise, particu-
larly in the wet range. However, fast mode is recom-
mended for dry soil samples with water potential <-40
MPa.
System Configuration
If you press the bottom left button while in the main
menu, it will bring you to the system configuration menu.
This menu allows you to make minor system changes.
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