TM 55-1510-219-10
Figure 3-26. Pilot's Encoding Altimeter
c.
Normal Operation.
(1)
Turn-on procedure. Encoding altimeter
will operate when transponder is operating with M-C
switch set to center position.
(2)
Operating procedure.
1.
Barometric set knob - Set desired
altimeter
setting
in
IN.
HG.
window.
2.
CODE OFF flag - Check not visible.
3.
Needle indicator - Check operation.
NOTE
If the altimeter does not read
within 70 feet of field elevation,
when the correct local barometric
setting is used, the altimeter
needs
calibration
or
internal
failure has occurred. An error of
greater than 70 feet also nullifies
use of the altimeter for IFR flight.
d.
Emergency Operation. Altimeter circuit breaker
- Pull (if encoder fault occurs).
3-78
