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ICT psy1 Quick Start Manual

Stem psychrometer
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  • Page 2: Table Of Contents

    Connecting Power Directly via Solar Panel ........... 7 Connecting Power Directly via CH24 Power Supply ........8 Cleaning the Psychrometer Chamber ............... 9 Installing ICT Combined Instrument Software and USB Driver ....... 10 Turning the Instrument On ................11 Connecting to the Instrument ................. 12 Connect via MCC Mini .................
  • Page 3 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.

  • Page 4: System Requirements

    The ICT Combined Instrument Software is compatible with the following operating systems: a) Windows 7 b) Windows 8 & 8.1 c) Windows 10 d) Mac OS X Screen Resolution ICT Combined Instrument Software works best on computers with a screen resolution of 1366 x 768 or larger.

  • Page 5: Charging The Psy1 Internal Battery

    Connecting a Power Supply to the Instrument (Pages 6 to 8). An external power supply should be connected to the PSY1 in the field. The unique power bus-plug design was developed by ICT International to simplify the electrical wiring process.

  • Page 6: Connecting A Power Supply To The Instrument

    Connecting a Power Supply to the Instrument...

  • Page 7: Connecting Power Directly Via Solar Panel

    Connecting Power Directly via Solar Panel Note: The PSY1 is non-polarised.

  • Page 8: Connecting Power Directly Via Ch24 Power Supply

    Note: Continuous connection of an external battery or constant power supply (for days to months at a time) is not recommended as this can shorten the life of the internal battery. ICT International recommend using a solar panel directly connected (with no external battery backup in parallel) wherever possible;...

  • Page 9: Cleaning The Psychrometer Chamber

    Cleaning the Psychrometer Chamber The Stem Psychrometer consists of two very small welded thermocouples made of very fine 25µm wire. This makes the sensor very sensitive for measuring water potential, but equally sensitive to dirt and mild oxidation. It is recommended that before starting any measurements you clean the thermocouples.

  • Page 10: Installing Ict Combined Instrument Software And Usb Driver

    To install the USB driver, choose USB Driver (c) and then wait for the installation to complete. Alternatively, the individual installers (Windows and Mac) are available in the Instrument Software folder on the USB drive. The most recent versions of all ICT software are available from: http://www.ictinternational.com/support/software/...

  • Page 11: Turning The Instrument On

    Turning the Instrument On To turn on your PSY1, connect the instrument to a computer via a USB cable. Alternatively, the PSY1 can be turned on manually by pressing the power button, and automatically turns on if a power supply is connected to the bus-...

  • Page 12: Connecting To The Instrument

    Connecting to the Instrument Connect a USB cable to the instrument. The PSY1 will be detected by the computer automatically, as with any USB device. Open ICT Combined Instrument Software and Search for Devices. Double-click the instrument in the list to connect to it or select it and click...

  • Page 13: Connect Via Mcc Mini

    Connect via MCC Mini Ensure that the PSY1 is on. Connect the MCC Mini to your computer, open ICT Combined Instrument Software. Tick ‘Auto RF Discover’ and then Search for Devices. The MCC Mini should appear on the list, it will then automatically search for nearby ICT Instruments.

  • Page 14: Setting Measurement Parameters

    Setting Measurement Parameters When you connect to an instrument, the Channels screen will be displayed. This shows the current measurement status, when the next measurement will take place, instrument serial number/name/comment, battery status, external power status, SD card status, and instrument date and time.

  • Page 15: Configuration

    Configuration Normally, all instruments provided by ICT International come pre-configured, calibrated and tested. All that you need to do is select a logging interval. This is done from the Configuration screen: Note: Click ‘Update Measurement Option Changes’ after changing any settings to send them to the logger.

  • Page 16: Chamber Heating

    Chamber Heating Chamber heating should be used whenever the psychrometer is subjected to very cold temperatures at night that could induce condensation. If such conditions are expected, a good protocol to follow is to employ chamber heating between 5 pm and 10 am to prevent the chamber from becoming colder than the stem.

  • Page 17: Diagnostics

    Diagnostics Temperature Correction Constants (C1 and C2) should not be changed unless advised to do so by an ICT Technician. Reverse Peltier (Warming) Reverse Peltier is not normally required for a clean psychrometer. This is typically only required for very humid conditions.

  • Page 18: Sd Card Logging Options

    SD Card Logging Options These settings allow you to select what is recorded to the SD card. By default, everything except Raw Data is logged. Raw Data creates a separate data file on the SD card in addition to the standard .csv file.

  • Page 19: Psy Logger Mounting And Sensor Installation

    PSY Logger Mounting and Sensor Installation Installation is an important aspect best explained by watching the SP03, SP04 and SP05 installation videos. Care must be taken to prepare the site for installation: (a) Latex exudates seeping from the stem. It would not be acceptable to install the Psychrometer under these conditions.
  • Page 20 Example installation of a small clamp on an herbaceous stem. Large clamp on a woody stem.

  • Page 21: Preparing A Site

    Preparing a Site Woody stems are preferred, but this technique works on most herbaceous species. Expose a suitable area of water conducting xylem tissue or sap wood (approximately 3cm x 1cm) to ensure that the psychrometer chamber well will be completely covered by the sample. Remove the bark, phloem and cambium layers, using a single edged razor blade to scrape a flat area of xylem upon which to mount the psychrometer.

  • Page 22: Sealing The Exposed Site

    PSY1 in live mode. If the dT and Thermocouple-C values change significantly a vapour seal has not been achieved and the site should be checked again.

  • Page 23: Downloading Data

    Download saves the instrument data to the Dataview repository and allows for basic graphing from the data tab. On Windows, the repository is located at: %localappdata%\ICT\Data Files Select Channels is used to select which logger outputs (channels) are displayed on the plot.
  • Page 24 Manage SD displays the content of the instrument SD card. Refresh List loads the list of files currently present on the SD card. Download File downloads the selected file to the location of your choice. Rename File allows you to change the name of the selected file. Note that if the instrument data file is renamed a new file will be created for measurements from that point onward.
  • Page 25 www.ictinternational.com sales@ictinternational.com.au Ph: 61 2 6772 6770 Fax: 61 2 6772 7616 211 Mann St, Armidale, NSW, Australia, 2350...

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