The 'NAVIGATOR' Compass - 'NV-2400 Series'
Contents
1. VIEW TO LOCATION O SHOW OF NAMEPLATE WIRING SCHEMATIC ANGL N CENTRE OF SLOTS TO ALLOW A CORRECTION ZERO MAGNETIC CORRECTION AS RNS LE 4 OFF CH CORRECTION co a GRAVITY lt MAXIMUM B amp C CORRECTION F MAXIMUM B CORRECTION NDICATION OF THE MAGNETIC ECTION APPLIED D BY REMOVING THE T ATED T ACH FROM THE C AND THE CATORS ARE REVEALED KETCH A MAGNETIC CORRECTION 3 ARE MAXIMUM MATERIAL CONDITION ars Seas m m TE E S A EAA ILLUMINATION SUPPLY EXT FINISH RESISTC CARD LEGEND COLOUR a 4 IAY BE REMOVED FROM BRACKET BY NONE N A BLACK N A OW SCREW INDICATED RED 5 6 BLACK 500 OHM C RED 12V BLACK Sa RED 28 BLACK amp CAT R CURVES B amp B1 X BLUE 5 6 BLACK j 4 C ADJUSTED W BLUE 12y BLACK OHM FLUORESCENT YELLOW TEMPERATURE RANGE 40C TO 8 BEST ED WITH THE BLUE 28 BLACK 2K OHM FLUORESCENT YELLOW MATERIAL FINISH TOLERANCES AWN DESCRIPTION SEE ITEM LIST V A N A RWE STANDE ID AC ST2. ANDBY COMPAS MATERIAL SPECIFICATION FINISH SPECIFICATION DIMS IN ATE INST ATIN D 4 RARI E RE ola ND ALLATIO J DRG NV5125 N A METRIC mm t November 2002 11 02 ND 190 a SAW INGONUMEGE i i q ya NIAVWICA N gt SCALE DRAWING NUMBER YO ISSUE DATE CHANGE NUMBER I R S NAVIGATION LTD ins 5 49 Page 2
3. The NAVIGATOR Compass NV 2400 Series Operating Instructions ae ow Ty m E a a d Lt EF EE EL Lo ee Ref OP NV 2400 01 Iss 2 The NAVIGATOR 2400 is a precision compass suitable for installation into Light Aircraft To obtain the optimum performance you should ensure that you carry out the following instructions carefully We advise you to read through these instructions and notes before attempting to mount the unit in your aircraft THE COMPASS The NAVIGATOR 2400 compass is provided with a magnetic compensating system which will enable you to minimise the magnetic disturbances created by the mechanical and electrical characteristics of your aircraft The Compass Card is graduated in 5 degree increments with cardinal points at N S E amp W Because of the limited space available the markings between the cardinal points should be multiplied by a factor of 10 i e 3 30 degrees 24 240 degrees etc The level of the compass Front to Back can be adjusted by loosening the rear screw and rotating the compass about the swivel point The screw should be re tightened after adjustment POSITION OF MOUNTING The compass should be mounted centrally on top of the Coaming and attached with 3 Non Magnetic screws of diameter no greater than 4mm 0 156 N S Correction Hole E W Correction H
4. efficient 1 Align your aircraft facing North insert the Corrector Key into the Right hand hole at the front of the compass rotate the key in either direction so that the North point is directly under the Index line 2 Align your aircraft facing South and check that the South point is under the Index Line Any error may be corrected by readjusting to remove HALF the error shown The above procedures can be repeated until the errors are minimised If the adjustments detailed above result in consistent errors on each of the Cardinal points the compass may not be aligned correctly on the Fore and Aft line of the aircraft to correct this mis alignment proceed as follows SIRS NAVIGATION Compass House e Bowes Estate e Wrotham Road e Meopham e Kent e DA13 OQB e England Tel 44 0 1474 816320 Fax 44 0 1474 816321 email sales sirs co uk website www sirs co uk Page 1 CORRECTION FOR MIS ALIGNMENT a Coefficient Only follow this procedure if the results obtained so far do not reach or requirements 1 2 3 4 CORRECTION TABLE In this example the compass body would need to be rotated by 5 degrees If having carried out these procedures the results are not satisfactory a new location must be found Before this can be done the NAVIGATOR must be returned to it s ZERO status by carrying out the following procedure 1 2 Fig Align the aircraft facing North record the compass error in Box A Align the aircraft
5. facing South record the compass error in Box B Align the aircraft facing East record the compass error in Box C Align the aircraft facing West record the compass error in Box D Note Fig 3 SIRS NAVIGATION Errors to the Left of the true heading should be prefixed with a plus sign Fig 2 Errors to the right of the true reading should be prefixed with a minus sign Fig 3 5 follows Add the readings in Boxes A to D enter the result in Box E Divide the figure in Box E by 4 record the result in Box F this figure is the error due to mis alignment and may be corrected as Note the current magnetic heading carefully loosen the two cross headed screws which secure the compass to the bracket rotate the compass body in the opposite direction to the error shown in Box F i e If the error in Box F is 5 degrees rotate the compass body by 5 degrees and vice versa Carefully tighten the two cross headed screws without moving the compass body BOX A NORTH E TOTAL F E 4 Sample Error ACTUAL ERROR pA Using the key provided rotate the spindles until all the white lines are parallel across the top plate this is the ZERO CORRECTION status 3 Choose another location for the NAVIGATOR and repeat the installation procedure Remove the NAVIGATOR from the bracket by removing the two cross headed screws this will reveal the top plate with its four spindles with white lines across
6. ole Mounting Holes 2 off at front and 1 at rear Fig 1 Before finalising the mounting point it is a good idea to temporarily mount the compass in its intended position and Swing the aircraft to see if the initial deviations are less than 30 degrees If the deviation for each cardinal point is less than 30 degrees then proceed with the mounting procedure described below If the errors are greater than 30 degrees then try mounting the compass in a different position If this does not resolve the problem local de gaussing may be required to reduce the disturbing magnetic influence ADJUSTING YOUR COMPASS Before your compass can be adjusted the aircraft must be capable of being aligned to both the East West axis and North South axis The use of another compass outside the aircraft to determine the cardinal points is advised These following notes should be used for initial installation guidance only the corrections should be checked or made by a qualified Compass Adjuster before flying CORRECTION EAST WEST B Coefficient 1 Align your aircraft facing East insert the Corrector Key provided into the Left hand hole at the front of the compass rotate the key in either direction so that the East point is directly under the Index line 2 Align your aircraft facing west and check that the West Point is under the Index line Any error may be corrected by readjusting to remove HALF the error shown CORRECTION NORTH SOUTH C Co
Download Pdf Manuals
Related Search