Texas Weather Instruments, Inc.
5
WR-25 Instruction Manual
OPERATION
FUNCTION KEYS
Select
The
select
key, when pressed at the same time as the
report
key,
puts the unit into time/date and lunar/tide cycle set mode. When the
select
and
scale
keys are pressed at the same time, the unit enters the calibration
set mode. When the
select
and
average
keys are pressed at the same time,
the unit enters the printer set mode. When
select
and
last
are pressed at the
same time the instrument enters rainfall history set.
Clear
The
clear
key, when depressed, causes the unit to display the date
and time of the last memory clear. Pressing
clear
and
minimum
at the same
time clears the unit's memory. Pressing
clear
and
maximum
at the same
time also clears the unit's memory. Pressing
clear
and
last rain
clears the
term rainfall.
Minimum
The
minimum
key, when repeatedly depressed, steps through
wind-speed/wind-direction, temperature, barometric pressure, humidity and
rainfall rate, displaying the minimum reading of each of these functions since
the last time the unit memory was 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.
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.
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 which represents how cold the
