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CHANNEL 1, 2 AND 3 OPTIONAL SENSORS
Optional sensors for the WMR928NX can be purchased and displayed as Channel 1, 2 and 3 Temperature and
Humidity Sensors. The following section describes the sensor part number, functionality and where to purchase
them.
CHANNEL PART NO. DESCRIPTION
THGR268 Indoor / Outdoor
Thermo/Hygrometer
Ch 1, 2, 3
Temperature
THC268 Waterproof temperature probe for
pools, spas, lakes, pipes, AC Ducts
Ch 1, 2, 3 Humidity THGR268 Indoor / Outdoor
Thermo/Hygrometer
JPEG FILES
Menu Shortcut: Settings X Jpeg File Settings
Jpeg is a standard image format for web pages. Virtual Weather Station periodically creates jpeg images for
inclusion on your web page, providing real time weather conditions that can be viewed from a web browser. You
can only generate jpeg images for weather displays currently on your desktop.
ADVANCED PARAMETER SETTINGS
Menu Shortcut: Settings X Advanced Parameter Settings
Virtual Weather Station provides a number of advanced parameter settings.
ADVANCED PARAMETER
SETTINGS
DESCRIPTION
Degrees Days Heating and
Cooling
Because temperature plays an important part in the rate of development of plants
and many pests, a measurement that takes into account the accumulation of heat
with passing time is important to predict maturation. Degree-days provide a
measure for calculating the effects of temperature on the development of plants
or pests.
One degree-day is the amount of heat that accumulates when the temperature
remains one degree above the threshold for one day. One degree-day is also the
amount of heat that accumulates when the temperature is 24 degrees above the
threshold for one hour.
Heating Threshold = the threshold for calculating degree-days heating.
Cooling Threshold = the threshold for calculating degree-days cooling.
Wind Run Wind run is the distance wind has traveled. For example, the wind run for a
constant wind speed of 32 kilometers per hour (20 miles per hour) for 2 hours is
64 kilometers (40 miles), or: Wind Run = Wind Speed * Time
There may be wind run calculation problems with specific computers due to the
microprocessor and other hardware devices. If you find the wind run values are
out of range, place the following line in your win.ini file: wuseDefaultTimer=True.
To reset these values, select SettingsXRecall Daily, Monthly and Yearly and
edit the wind run for the day, month and year.
Pressure Trend Virtual Weather Station will calculate the pressure trend based on your own
specified threshold. If the rate of change of pressure is above or below this
threshold, Virtual Weather Station will report a rising / falling pressure trend.
Wind Gust You can override your station’s default wind gust calculation method and select
the maximum within a specified number of samples.
Filtered Average Time
Constant
The time constant for the filtered average can be varied. The filter is based on a
low pass filter differential equation. The output value reaches 63% of the input
value after one time constant (the default time constant is 60 minutes or one
hour), and will reach 95% of the input value after five time constants (default =
300 minutes or five hours).
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