PRIMUSr 880 Digital Weather Radar System

5 TRB (Turbulence Detection)

TRB switch is used to select the turbulence detection mode of operation. The TRB mode can only be selected if the MODE switch is in the WX position and the selected range is 50 miles or less. The weather/turbulence mode is annunciated in the mode field with the green WX/T legend. Areas of at least moderate turbulence are shown in soft white.

CAUTION

TURBULENCE CAN ONLY BE DETECTED WITHIN AREAS OF RAINFALL. THE PRIMUSR 880 DIGITAL WEATHER RADAR SYSTEM DOES NOT DETECT CLEAR AIR TURBULENCE.

WARNING

UNDETECTED TURBULENCE CAN EXIST WITHIN ANY STORM CELL. REFER TO SECTION 5, RADAR FACTS, OF THIS GUIDE FOR ADDITIONAL INFORMATION.

Selecting the 100--, 200--, or 300--mile range turns off the turbulence detection. The /T is deleted from the mode annunciation and variable gain is engaged if previously selected. Subsequent selection of ranges of 50 miles or less re--engages turbulence detection.

A description of the turbulence detection capabilities and limitations can be found in Section 5, Radar Facts, of this guide.

6 TILT

The TILT switch is a rotary control used to select tilt angle of antenna beam with relation to the horizon. CW rotation tilts beam upward to +15_; ccw rotation tilts beam downward to --15_.

A digital readout of the antenna tilt angle is displayed on the EFIS.

DPULL ACT (Altitude Compensated Tilt) Function -- When the TILT control knob is pulled out, the system engages the ACT (option). In ACT, the antenna tilt is automatically adjusted with regard to the selected range and barometric altitude. The antenna tilt automatically readjusts with changes in altitude and/or selected range. In ACT, the tilt control can fine tune the tilt setting by ±2°.

ACT is annunciated with an A following the digital tilt legend. The digital tilt readout always shows the commanded tilt of the antenna regardless of the tilt command source (ACT command or manual tilt command).

 

 

 

Operating Controls

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Honeywell 880 manual Tilt