Sandel
Avionics
SN3308 Navigation Display
Installation Manual
90106-IM-G(4) Installation Manual W SIG.doc
Appendix-A Page 2
Slaving:
Turns slaving On and Off. When turned on, the following additional
information will display:
Cont’d
.
.
.
.
FLUX GATE KMT-112
(ITEM)
QUADRANT
0
q
(CALIBRATION)
PEAKING
6
(ADJUSTMENT)
FG X SIG
XXX
FG Y SIG
YYY
EXC. LOCK
00
EXC. VALID
00
Notes:
Use
n
and
p
to select the item and the HDG control knob to adjust.
When a flux gate is
first selected
the Quadrant and Peaking adjustments will
automatically preset.
Upon power-up, the flux gate should show a heading (on page-3) which is
within
r
20
q
of true heading (prior to calibration) and the compass card on page
3 should turn in the correct direction as the aircraft turns or the fluxgate is
turned manually. If this is not the case, the following troubleshooting
procedure can be used to diagnose fluxgate problems.
It is sometimes difficult to determine wiring errors because it is difficult to
determine the correct fluxgate terminals which actually represent XYZ since
this information may not be supplied with the fluxgate. The following
procedure can be used to make this determination.
a) Align the aircraft to North. Turn the system on and step the “quadrant”
adjustment to align the SN3308 display to North
r
20
q
. (Ensure the
adjustments on Page-3 are set to zero). If you can’t get closer than 30 or 40
degrees, your “xyz” may actually be “yzx” or “zxy”. Take all three wires off the
fluxgate and move them one terminal “clockwise” and try again. You may
have to do this a second time. Once the system achieves correct “North”
seeking, the “Z” terminal has been correctly identified and should not be
changed.
