TRB Turbulence, Range, AZ Azimuth, SCT Scan Sector | Honeywell 880

PRIMUSr 880 Digital Weather Radar System

The radar antenna is normally attitude stabilized. It automatically compensates for roll and pitch maneuvers (refer to Section 5, Radar Facts, for a description of stabilization). The STB OFF annunciator is displayed on the screen.

6 TRB (Turbulence)

The TRB switch is used to select the turbulence detection mode of operation. The TRB mode can only be selected if the FUNCTION 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 WX/T legend. Areas of moderate or greater turbulence are shown in soft white. The turbulence threshold is five meters per second.

WARNINGS

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

2.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 turbulence detection. The /T is deleted from the mode annunciation. Subsequently selecting ranges of 50 miles or less re--engages turbulence detection.

A description of the turbulence detection capabilities and limitations is given in Section 5 , Radar Facts, of this guide.

7 RANGE

The RANGE buttons are two momentary--contact buttons used to select the operating range of the radar. The range selections are from 5 to 300 NM full scale. In FP mode, additional ranges of 500 and 1000 NM are available. The up arrow selects increasing ranges, and the down arrow selects decreasing ranges. Each of the five range rings on the display has an associated marker that annunciates its range.

8 AZ (Azimuth)

The AZ button is an alternate--action switch that enables and disables the electronic azimuth marks. When enabled, azimuth marks at 30_ intervals are displayed. The azimuth marks are the same color as the other alphanumerics.

9 SCT (Scan Sector)


Operating Controls	A28-1146-102-03
3-8	REV 3

Image 23

Honeywell 880 manual TRB Turbulence, Range, AZ Azimuth, SCT Scan Sector

Contents

Page PRIMUSr 880 Digital Weather Radar System Pilot’s Guide Table of Contents Honeywell Product Support Appendices Federal Aviation Administration FAASection Radar Facts Maximum Permissible Exposure Level Enhanced GROUND--PROXIMITY Warning Federal Aviation Administration FAA Advisory CircularsList of Illustrations Radar Beam Illumination High Altitude Rain Coming From Unseen Dry Hail List of Tables Introduction A28- 1146- 102 System Configurations Efis only Configuration PRIMUSâ 880 Configurations Mode Dual Control Mode Truth TableLeft Right Controller Left Side Right Side RTA Primusr 880 Weather Radar Equipment List Model Unit Cockpit Mounted OptionsRemote Mounted Equipment Typical PRIMUSâ 880 Weather Radar Components Typical PRIMUSâ 880 Digital Weather Radar Display WI- 880 Weather Radar Indicator OperationOperating Controls Range 3 Gmap Calibrated Gain Rainfall Rate Color Coding Rainfall Rate Color In/hr Mm/hr Fsby Forced Standby TGT Target STB Stabilization Selected Range Minimum Target Target Range Depth NM SCT Scan Sector TRB TurbulenceRange AZ Azimuth Tilt BRT Brightness or BRT/LSS Lightning Sensor System Gain WC- 880 Weather Radar Controller Operation WC- 880 Weather Radar Controller Configurations Tilt Radar SLV LSS Gain EFIS/MFD Radar PRIMUSr 880 Digital Weather Radar System Maximum Permissible Exposure Level Mpel Sect Scan Sector TRB Turbulence Detection Range LSS Lightning Sensor System Option SLV Slave TGT Target Alert WC- 884 Weather Radar Controller OperationWC- 884 Weather Radar Controller BRT Brightness RCT Rain Echo Attenuation Compensation Technique Tilt Mode Rainfall Rate Color In/hr Mm/hr PRIMUSr 880 Digital Weather Radar System Forced Standby Override Hidden Modes Pitch Gain Roll OffsetRoll Gain Pitch Offset PRIMUSr 880 Digital Weather Radar System Normal Operation Preliminary Control SettingsStep Procedure Primusr 880 Power--Up Procedure Cont Indicator Test Pattern 120 Scan WX With Text Fault Enabled Output Power is Radiated in Test ModePRIMUSâ 880 Power- Up Procedure 319 Efis Test Pattern Typical 120 Scan Shown WX Standby Radar Mode WeatherWI--880 Indicator Test Pattern With Text Fault Enabled REV Test Mode Radar Mode Ground Mapping 4-8 blank Radar Operation Radar Facts Aircraft Heading PRIMUSr 880 Digital Weather Radar System Sea Returns Radar Beam Illumination High Altitude Inch Radiator Tilt Management Radar Beam Illumination Low Altitude Inch Radiator PRIMUSr 880 Digital Weather Radar System Range Scale Line Tilt Limited Earth’s Curvature Ideal Tilt Angle Unaltered Tilt Convective Thunderstorms Tilt Management With Heading Changes Proper Tilt Technique Low Altitude Tilt Management Fast Developing Thunderstorm Rules of Thumb Antenna Size and Impact on Tilt Management Altitude Compensated Tilt ACT Manual Tilt at Low Altitudes Stabilization Dynamic ErrorAccelerative Error Pitch and Roll Trim Adjustments Pitch and Roll Trim Adjustments Criteria Level Flight Stabilization Check Stabilization In Straight and Level Flight Check ProcedureStabilization Precheck Ground Return Indicating Misalignment Upper Right Symmetrical Ground Returns Roll Stabilization Check Stabilization in Turns Check ProcedureGround Return Indicating Misalignment Upper Left Roll Stabilization Inoperative 23. The radar unit is in the roll offset In- flight Roll Offset Adjustment Procedure Push the Stab STB button to go to the next menu pitch offset Roll Offset Adjustment Display Final Pitch Offset Adjustment Procedure Pitch Offset Adjustment Roll Gain Adjustment Roll Gain Adjustment Pitch Gain Adjustment Pitch Gain Adjustment Weather Radar Images Interpreting Weather Radar Images PRIMUSr 880 Digital Weather Radar System Radar and Visual Cloud Mass Squall Line Weather Display Calibration Display Levels Related to VIP Levels Typical Rain Echo Attenuation Compensation Technique React LOW Variable Gain Settings can Eliminate Hazardous TargetsVariable Gain Control PRIMUSr 880 Digital Weather Radar System React on and OFF Indications With React SelectedReact Do not FLY Into the Shadow Behind the Cell ShadowingTurbulence Probability Probability of Turbulence Presence A Weather Target Turbulence Detection Theory Areas of Turbulence can not Always be Detected by the Radar No Turbulence Total Return Vector Weather Display With Turbulence Turbulence Detection OperationTurbulent PRIMUSâ 880 Digital Weather Radar can only Detect Turbulence Levels From Airman’s Information Manual Hail Size Probability Hail Size Probability Spotting Hail Rain Coming From Unseen Dry Hail Familiar Hailstorm Patterns Overshooting a Storm Short- and Long- Blind Alley Azimuth Resolution in Weather Modes Azimuth Resolution Radome Weather Display Weather Avoidance Tudes WITHIN, NEAR, or Above Storm Cells Do not Leave the Radar in Variable GAIN. SIGNificant Weather MAY not be Displayed DRY Hail can be Prevalent AT Higher Alti Severe Weather Avoidance Procedures 10 3. Interaction With Other Storms. a thunderstorm that is Step Procedure Display Configurations of Individual Echoes Northern HemisphereStorms Situated Behind Intervening Rain Fall MAY be More Severe than Depicted on Typical Hook Pattern Notch Echo, Pendant Shape Avoid V- Notch by 20 Miles Classic Pendant Shape Avoid Pendant by 20 Miles Avoid ALL Crescent Shaped Echoes by 20 Miles Avoid Steep Rain Gradients by 20 MilesRain Gradients Crescent Shape Line Configurations Line Echo Wave Pattern Lewp Avoid Line Echo Wave Patterns Lewp by 20 Miles Bow- Shaped Line of Thunderstorms Avoid BOW- Shaped Line of Echoes by 20 Miles Turbulence Versus Distance from Storm Edge Additional HazardsTurbulence Versus Distance from Storm Core Ground Mapping Display Ground Mapping Tilt Setting for Maximal Ground Target Display Inch Radiator Range Scale Mpel Boundary Maximum Permissible Exposure Level Mpel In- Flight Troubleshooting Test Mode With Text Faults Enabled Field No Description Fault Data Fields 315 Text Faults Cont Fault Code and Text Fault Relationships IO Fpga REG Text Faults Pilot Messages Describes the pilot messages Honeywell Product Support Customer Response Center CRC Customer SupportHoneywell Aerospace Online Technical Publications Web Site Abbreviation Equivalent Abbreviations FLTPLN, FP RCT, React Purpose Federal Aviation Administration FAA Advisory CircularsCancellation Appendix a Body Damage Background PrecautionsGeneral Combustible Materials Squall Lines Subject ThunderstormsGeneral Hazards Turbulence Tornadoes Icing Schematic Cross Section of a Thunderstorm Effect on Altimeters HailLOW Ceiling and Visibility Weather Radar Lightning DO’S and DON’TS of Thunderstorm Flying PRIMUSr 880 Digital Weather Radar System Turbulence in Relation to Distance from Storm Core Relationship Between Turbulence and ReflectivityRelationship Between Turbulence and Altitude Turbulence and Echo Intensity on NWS Radar WSR Turbulence below Cloud Base Turbulence in Relation to Distance from the Storm EdgeTurbulence Above Storm Tops Hail in Thunderstorms Maximum Storm Tops USE of Airborne Radar Extrapolation to Different Climbs Egpws Controls Enhanced Ground-Proximity Warning System EgpwsAppendix B System Operation Annunciators Push Button Controls Egpws Operation Related Egpws System Operation Egpws Display Figure B--1 Egpws Test Index Index TGT target, 3-6 tilt TRB turbulence Radar facts cont rain echo attenuation Index--5 BRT brightness or BRT/LSS lightning sensor system