Specifications

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Attach the sensor cables to the appropriate terminals: Use the small screwdriver that comes
with the data logger to securely attach the cables to the terminals by loosening the screw in each
terminal, inserting the cable in the slot above, and then tightening the screw so the cable makes
good contact with the terminal. The temperature/RH and solar radiation sensors should be
connected to differential analog terminals (e.g. 1H/1L), while the precipitation sensor is
connected to a pulse terminal (e.g. P1). The ground cables can all be connected to the same
terminal for a given sensor. Additionally, the Temperature/RH sensor requires power from the
data logger (12V terminal).
Sensor location: The sensors can remain indoors for the test, but if possible, locate the radiation
sensor outside to get a natural reading.
Rain Gauge: Take the cover off the tipping rain gauge (TB4) and make sure the tipping
mechanism is loose (it is usually secured with a rubber band for shipping). You will be adding
some water to the rain gauge so replace the cover and put the gauge inside another bucket or
above a collection tray to avoid water spillage.
Collection of test data: Once the sensors are all connected, turn the data logger back on and
wait for about 1-2 hours for data collection. Slowly add 1/3 of a liter of water (about 10 mm) to
the rain gauge over a 5-10 minute period.
3.5 Extract the data from the data logger
Examine the data collected to ensure the sensors and data logger are working properly. Select the
Collect Data tab in the main PC200W window and press the Change Table’s Output File
button to specify the name of the file and directory where the data will be written. Finally, press
the Collect button on the upper left corner of the tab to write the data to the file (see Figure 1).
Usually we will obtain the data from the memory card, not from the datalogger itself (see Section
0 for this process).
Figure 1: Collect Data tab in the main PC200W window.