Columbia Weather Systems, Inc.
37
SECTION 6: OPERATION
A. TEMPERATURE
Actual temperature is displayed in the range -67
o
F to 140
o
F or -55
o
C to 60
o
C. The
Capricorn II Plus continuously averages the temperature detected by the probes and
updates the display approximately every 12 seconds.
1.
Temperature Display: For a continuous display of temperature move the
Temperature/Humidity Display switch on the back panel of the console to the
“temperature” position.
3.
Alternating Display: By moving the Temperature/Humidity Display switch to the
“alternating” position, the display will alternate between the temperature and
humidity every four seconds.
4.
Sensor Indicator Display: Two LED lights to the right of the Temperature/
Humidity display on the front panel indicate which reading (“temperature” or
“humidity”) is being displayed.
5.
Units of Measure: Temperature may be displayed in either units Fahrenheit (F)
or Celsius (C), as determined by the position of the F/C switch below the
Temperature/Humidity display on the front panel.
6.
Display Resolution: To display temperature with 0.2
o
F (0.1
o
C) resolution,
move the Mode switch on the back panel to the “calibrate” position.
Note: When the unit is in the “calibrate” mode, the averaging will not be per-
formed and the memory will not be updated with high/low temperature values.
The temperature display may appear unstable as a result of the lack of averag-
ing.
7.
Wind Chill Display: The “wind chill” temperature is displayed when the Real/
Chill switch on the front panel is in the “chill” position. It is a computed value
based on the actual temperature and the average wind speed. (Please refer to
Addendum: Wind Chill Algorithm.) The microcomputer does not calculate the
“wind chill” temperature when the temperature exceeds approximately 91
o
F or
33
o
C. Above this point the temperature displayed will be the same whether or
not the switch is in the “real” or “chill” position. The lowest temperature that can
be displayed for the wind chill temperature in the Celsius position is 99
o
C (-
146
o
F). In the Fahrenheit position, -99
o
F (-73
o
C) is the lowest temperature.
B. RELATIVE HUMIDTY
Relative Humidity is displayed in the range 0 to 99% RH in a non condensing -40° to
130° F or -40° to 55° C temperature range. The Capricorn II Plus averages the
continuous relative humidity readings from the sensor and updates the display
approximately every 12 seconds.
1.
Humidity Display: For a continuous display of the relative humidity, move the
Temperature/Humidity Display switch to the "humidity" position.
