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36
KMD 550/850 Pilot's Guide
Rev 7 Sep/2005
POWER-UP
At power-up, the WX-500 executes a power-up self test. The self test
takes approximately 25 seconds to ensure that all major WX-500 func-
tions are operating properly. During this period you may receive a NO
DATA RECEIVED FROM STORMSCOPE message, this is normal.
Functions tested include antenna reception, memory and microprocessor
functions. An error message is displayed if a fault is detected.
HEADING STABILIZATION
Some aircraft are equipped with a remote heading reference, such as an
HSI with a slaved directional gyro. This allows the heading stabilization
feature to automatically adjust the position of the discharge points on the
display when the aircraft changes heading. The heading information
comes from a remote heading source installed in the aircraft that has
been connected to the WX-500. If this heading information is valid, the
WX-500 and KMD 550/850 will use it. In the absence of an external
heading reference, such as an aircraft with only a directional gyro, the
KMD 550/850 will not allow stormscope strikes to be overlaid on the Map
display, nor will it allow flight plan data to be overlaid on the stormscope
display.
CLEAR ALL DISCHARGE POINTS
Clearing the discharge points periodically while monitoring thunder-
storms is a good way to determine if the storm is building or dissipating.
Discharge points in a building storm will reappear faster and in larger
numbers. Discharge points in a dissipating storm will appear slower and
in smaller numbers. To clear the discharge points, move the joystick on
the KMD 550/850.
Clearing the display is especially important if an external heading refer-
ence is not used with the system. The display should be cleared after
changes in heading in order to make the displayed strikes reflect their
true position in relation to the aircraft.
SWITCH BETWEEN WEATHER VIEWS
The KMD 550/850 can display the Stormscope
®
data
in one of two views, either all round (360°) or forward
looking only (120°). To switch the display press the
VIEW button to toggle between the displays. Figure
32 is an example of the all round view and Figure 33
shows the forward looking view.
WX-500 Stormscope
®
Operation
KMD 550-850 PG R8 3/6/07 11:22 AM Page 36