Columbia Weather Systems, Inc.
33
SECTION 5: CALIBRATION
Tools Needed:
Small Slotted Screwdriver
Insulated, Watertight Container
Materials Needed:
Crushed Ice
Water
A. CALIBRATING THE TEMPERATURE SENSORS
The Capricorn II Plus temperature probe is carefully calibrated at the factory and
should not require any re-calibration for sometime. In any event, the probe should
not be calibrated until the unit has had a sufficient warm-up time, at least one hour.
To re-calibrate, perform the following steps:
1.
Move the Mode switch on the back panel of the console from “operate” to
“calibrate.”
2.
Move the Temperature Display switch on the back panel of the console to the
“Temperaturer” position.
3.
Move the
o
F/
o
C switch on the front panel to
o
C.
4.
Create an ice bath by mixing two cups of crushed ice in one cup of water. Use
an insulated container for best results. A Thermos-type container is preferable.
Allow the temperature throughout the ice bath to stabilize by waiting five
minutes before proceeding.
5.
Place the temperature probe in the ice bath. Stir the ice bath with the probe.
Keeping the probe tip from touching the sides or bottom of the container,
continue stirring during step 6.
6.
Use a small flat head screwdriver to turn the “Calibration; Temperature.” screw
on the back panel of the console. Turn it clockwise to decrease the value of
the display, counterclockwise to increase the value of the display. Adjust the
screw until the Temperature Display reads 0.0
o
C.
8.
When finished with re-calibration, move the Mode switch back to the “operate”
position.
B. CALIBRATING THE HUMIDITY SENSOR
The relative humidity sensor is pre-calibrated at the factory. The entire console and
humidity sensor must be returned to the factory to maintain factory specifications.
Call the factory regarding information on this procedure.
