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Texas Weather Instruments, Inc. 5 WRL Instruction Manual
cleared. In addition to the minimum reading, the unit displays the date and time of its
occurrence. The date and time display must not be on hold in order to display both date and
time.
Maximum
The maximum key functions the same as the minimum key, but with maximum readings.
Scale
The scale key changes the displays from reading in English values to those of Metric
values. The inch light near the rain display is on when the instrument is in English mode.
The English to Metric equivalents are miles per hour or Knots to Kilometers per hour,
Fahrenheit to Celsius, Inches of Mercury to Millibars, Inches of rain to Centimeters of rain.
Pressing the select and scale key at the same time puts the unit into calibration mode. If the
unit is in protect mode, this function is disabled.
Report
Pressing the report key sends current data to the serial port. The report key, when
depressed at the same time as the select key, puts the unit into its time setting function.
Pressing the report key while in logging mode will send all data in memory from the
currently displayed record forward to the RS-232 port.
Hold
The hold key when depressed (toggled on) stops the cycling between two different
parameters on the same display.
Windchill
The Windchill key, when depressed, calculates and displays, using wind speed and
temperature, a factor that represents how cold the temperature and wind feel to bare flesh.
Pressing the windchill and the comfort key at the same time will display the dew point.
Comfort
The comfort key, when depressed, calculates and displays, using humidity and
temperature, a factor which represents how warm the temperature feels.
Last
The last key, when depressed, displays the time and date of the last rainfall and its rainfall
rate. When depressed at the same time as the clear key, the instrument clears the term
rainfall register. When last is pressed at the same time as select, the unit enters into
rainfall history mode.
Average
When toggled on, the dot below the Av light (near the wind speed display), indicates that
the unit is in wind averaging mode. When in wind averaging mode, the instrument displays
the previous minute's average wind direction and speed. When depressing the average
key and the select key at the same time, the unit enters into the printer set mode.