Nat LD08, Инструкция по установке и эксплуатации, Страница: 12 / 28

LD08 Lamp Dimmer Manual SM15 Rev. 4.00
Page 2-2 Nov 21, 2003
ENG-FORM: 805-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.3.3 Cable and Wiring
Use Tefzel Mil-M-27500, Mil-M-22759 or Mil-M-81044 single conductor and shielded
wire with solder sleeves (for shield termination) to make the most compact and easy to
terminate interconnect. Follow the wiring diagrams provided in Section 2.4 as required
for your version.
Allow 3 inches from the end of the wire to the shield termination to allow the hood to be
easily installed. Note that the hood is a "clamshell" hood and is installed after the wiring
is complete.
All wiring should be at least 22 AWG, except input power and ground connections which
should be 20 AWG. Ensure that the ground connection is clean and well secured. To
prevent system failure or inadequate equipment protection, power to this system must
be supplied from a separate breaker or fuse (1 A) and not bundled to any other source.
2.4 Installation Options
The normal installation of the LD08 requires a single toggle switch for the pilot's control.
It is recommended that the switch should be a SPDT center-off toggle, spring loaded in
the TEST position. Alternatively, the DIM function can be selected by a separate
switch, or tied into another switch function, and the lamp test can be activated by a
momentary pushbutton switch.
The switch should be connected to select between the following modes:
DIM Night flying lamp levels. To be adjusted either at the panel
or using the DIM LEVEL trimpot at the back of the LD08.
NORM
Day flying lamp levels, full brightness.
TEST
All lamps ON, full brightness. Tests functionality of all lamps.
The DIM position can also have a potentiometer connected in series with the switch, to
permit local adjustment of the night flying lamp level. The switch may also be integral
with the potentiometer to conserve panel space.
2.4.1 Optional Dimmer Adjustment
Inserting a 10 k
Ω
, 1/2 W linear taper potentiometer between the dimmer input and ground
will allow external adjustment of the dimming voltage. If using an external adjustment,
make sure internal trimpot is set for minimum voltage output (rotated fully ccw).
2.4.2 NORM/EMERG BYPASS Switch