WeatherHawk SM-19 Skymate Plus w/Humidity, Dew Point, & Temp - Manual (Page 2)

General Temperature
Displays the temperature in Fahrenheit or Celsius.
Dew point:
Displays the temperature at which air becomes saturated with moisture (the temperature at which fog will form).
Relative Humidity
Displays the current relative humidity. Relative humidity is the amount of moisture measured in the air. Your Skymate
Plus comes pre-calibrated from the factory for relative humidity. However, the Skymate Plus can be calibrated manu-
ally for more demanding field requirements. To calibrate the relative humidity, see the Humidity Calibration section.
Humidity Re-calibration: (Your Skymate Plus comes pre-calibrated from the factory.)
Figure A Figure B
First, locate your calibration paper that was supplied with your Skymate Plus (it is a small white slip of paper with
numbers on it). You will find on the bottom left corner the word VOUT, followed by two numbers (voltage input value
at 0% and 75%). It will look similar to this:
Vout @0% = 0.744 @75.3% = 3.056
With the unit on, press and hold the mode button and the on/off button at the same time for about 2 minutes. Next,
release the on/off button and instantly press it again (do not hold it this time) and then release the mode button.
You will now see the number 700 displayed on the screen. Enter the first voltage input number (744 in the example
above) into this screen by pressing the mode button to scroll up (omitting the decimal). When finished, press the on/off
button again, you will see the number 3000. Enter the second voltage input number (3056 in the example above) here,
using the same procedure as before. To store the changes, press the on/off button. The unit will then shut off with the
new values stored internally. NOTE: It is very important that the voltage input information be kept with your Skymate
Plus instructions. If this paper is lost, you will need to call WeatherHawk’s technical support line at (435) 750-1840 to
acquire the correct calibration information.
Impeller Replacement
To replace the impeller, use a small screwdriver
(preferably a #2 phillips head screwdriver) to loosen the
set-screw on the back of the unit. Remove the impeller
by turning it clockwise (if you are facing the back of the
windmeter) to the “O” position.
Battery
To replace the battery, turn the compartment cover
clockwise to remove it. The battery will be visible in the
battery compartment. Note the position of the battery
and replace with a new CR2032 lithium battery in the
same position. The CR2032 battery can be purchased
anywhere batteries are sold.
WeatherHawk ® 815 W 1800 N (435) 750-1802
Logan, UT 84321 www.weatherhawk.com