Introduction
The PSY1 Stem Psychrometer is a powerful tool integrating all the ambient
environmental parameters acting upon the plant, such as solar radiation,
temperature, humidity, wind speed and water availability, into a single
continuously measurable variable.
Stem water potential directly reflects the energy required to access water, an
indication of the stress the plant is undergoing.
Note:
This manual should be used in conjunction with the instructional
videos on the ICT YouTube channel:
https://www.youtube.com/c/ICTinternational
Note:
The psychrometer thermocouples are made from 25 µm
Chromel/Constantan wire, you will require a microscope to view the
thermocouples. You cannot see them or manipulate their position with the
naked eye. The thermocouples can easily be broken if handled incorrectly.
Please watch the video Adjusting the Thermocouples
(
https://youtu.be/kNsZnSYDBPE
) before removing the chamber lid.
Photo:
25 µm Chromel/Constantan thermocouples viewed under a dissection
microscope at 20x magnification.
