WeatherHawk SM-28 Skymaster Wind/Weather Meter - Manual (Page 7)

With the unit on, press and hold the on/off button for 10 seconds. The display will turn off
and then back on, displaying the number 700 (Fig. A). Enter the first voltage input number
(in the above example, the number is 744) into this screen by pressing the mode button to
scroll up (omitting the decimal). Note: When in humidity calibration mode, the mode button
only scrolls up, not down, so it is important that you do not miss the number you are entering.
When finished, press the on/off button again, you will see the number 3000 (Fig. B). Enter
the second voltage input number (3056 in the example above), 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: Each unit has unique voltage input numbers. It is crucial
that you do not lose your instrument’s numbers.
Impeller Replacement:
To replace the impeller, use a small screwdriver to loosen the set-screw found on the back of
the weather monitor. Remove the impeller by twisting the impeller assembly clockwise (if you
are facing the back of the windmeter) to the “O” position marked on the rear of the meter.
Battery:
To replace the battery, turn the compartment cover in a counter-clockwise direction to remove
it. The battery will be visible in the battery compartment. Insert a new CR2032 lithium
battery “+” side facing you. CR2032 batteries can be purchased anywhere batteries are sold.
NOTE: Different modes have different drains on the battery life. When left on in barometer
mode, the battery will last 400 hours. Wind speed &humidity will drain the battery quickest
Severe Weather Alarm:
The severe weather alarm will sound if there is a dramatic change in pressure. The feature is
set to go off if the air pressure changes by 6 millibars (up or down) within a 3-hour period.
(This is a good indication of severe weather approaching.) The alarm will sound once for five
seconds. If the pressure continues to change by the same amount, the alarm will continue to
sound once every hour.
NOTE: the storm alarm feature is disabled when the Skymaster is in Altitude mode. This is to
prevent the alarm from sounding false alarms as your altitude changes (due to the altitude’s
effect on air density).