Mooney M20K - Fuel Flow Transducer

SERVICE
AND
MAINTENANCE
MANUAL
M20K
MOONEY
AIRCRAFT
CORPORATION
3.
TRU
FLOW 1
(ALCOR)
SYSTEM
A.
DISPLAY -The
unit
features
a
liquid crystal
dis-
play
(LCD)
to
indicate
fuel
flow and
total fuel
used
FT 101
simultaneously.
The
display
is
backlighted
and features
SCAEW
uHlr
automatic
dimming
through
a
photo
cell
sensor.
B.
ELECTRONICS
The
TRU
FLOW 1
amplifica-
I
tion
system
is
located
in
the indicator
away
from the
engine
environment.
The
IRU
FLOW 1
operates
on a
SCREW
~7
low
power
requirement
and
is
protected
against
volt-
SCREWS
HOUSIHO age surges.
3
C.
MEMORY
The
TRU
FLOW
1
micropressor
12\
BICURITY
~I I
continously updates
and
stores
the
total fuel used
I
quantity.
The total
fuel used
quantity
is retained
during
PRCCR*YYING
aircraft shutdown
through
a
low
power
drain
memory
SWITCH BLOCI(
ciruit
connected
to
the
battery.
D.
INTERNAL
CONTACT
ARRANGEMENT
The
FT-101
SWITCH
ARRANGEMENT
FIGURE 73
2
configuration
selection
block
located
inside
the
TRU
FLOW
1
indicator
has
several
arrangements
to
change
2.
f=T1O1A
(HOSKINS) System
data
readout
a
desired.
Jumpers
should
not
be
A.
Basically
same as
FT101.
B. Refer
to
Hoskins
Operators
changed
unless
the
K-factor
of
the
transducer has
C.
or
Maintenance Manual
changed
due
to
replacement.
(See
Section
73-31-01,3,
D.
for
specific
data.
for K-factor
description).
Refer to
Figure
73-3
for Alcor
E.
See
Figure
73-1A
for FT1OIA
Switch
arrangement.
contact
arrangement.
To
reconfigure
the unit
proceed
K-FACTOR ADJUSTMENT
FT1O1A
SWITCH
NUMBERS
S1
S2
S3
S4
S5
S6
S7
(1111)
LOW LOW LOW CLOSED
OPEN
OPEN
X
X
N
X
(2222)
LOW LOW OPEN CLOSED
OPEN
X
X
O
X
(3333)
LOW
CLOSED CLOSED
OPEN
X
X
T
X
(4444)
MEDIUM OPEN
OPEN
CLOSED
X
X
U
X
(5555)
HIGH CLOSED
OPEN
CLOSED
X
X
S’
X
(6666)
HIGH HIGH OPEN CLOSED
CLOSED
X
X
E
X
(7777)
HIGH HIGH HIGH CLOSED
CLOSED CLOSED
X
X
D
X
FUNCTIONS
GALLONS
X
X X
OPEN
OPEN
CLOSED
LITERS
X
X X
CLOSED
OPEN
OPEN
POUNDS
X
X
X
OPEN
CLOSED
OPEN
FIGURE
73-1A
FT1O1A SWITCH
ARRANGEMENT
73-31-01
OLDWILLWAYNE