TB 9-4920-464-24
Table 5. Diagnostic Cable Resistance
TI
Multimeter Reading
Cable
Plug
Pin
Plug
Pin
Min
Max
#
#
#
#
#
>10 M Ω
LTCT30572-01
P1A
A
P1B
A
n/a
<1.0 00 Ω 1
P1A
A
P1B
A
n/a
P1A
B
P1B
A
50.0
125.0
<0.100 Ω 2
P1A
B
P1B
B
n/a
<0.100 Ω
P1A
C
P1B
C
n/a
<0.100 Ω
P1A
D
P1B
D
n/a
<0.100 Ω
P2A
A
P2B
A
n/a
<0.100 Ω
P2A
B
P2B
B
n/a
<0.100 Ω
P2A
C
P2B
C
n/a
<0.100 Ω
GND3
GND3
P1A
P1B
n/a
<0.100 Ω
GND3
GND3
P2A
P2B
n/a
<0.100 Ω
LTCT29353-01
P2
A
P14
A
n/a
<0.100 Ω
P2
B
P14
B
n/a
<0.100 Ω
P2
C
P14
C
n/a
<0.100 Ω
P2
D
P14
D
n/a
<0.100 Ω
P2
E
P14
E
n/a
1 Turn TI AIRCRAFT TORQUEMETER POWER switch to ON.
2 Turn TI AIRCRAFT TORQUEMETER POWER switch to OFF.
3 GND is measured at the ground lug wires on the bayonet mounts of the cables.
(4) Turn TI POWER switch to OFF.
b. Adjustments. No adjustments can be made.
11. Aircraft System Test
a. Performance Check
(1) Ensure TI POWER switch is in the OFF position.
(2) Connect equipment as shown in figure 3 below.
Resistance Standard
set to 100 Ω
P14A
J2P2
A
iET
HARS-LXSERIES
B
TI
LTCT29351-01
A
B
P14B
Calibrator
Figure 3. AC voltage setup.
(3) Turn TI FUNCTION SELECTOR switch to AIRCRAFT SYSTEM TEST and
turn TI POWER switch to ON.
(4) Set decade resistor to 100 Ω and calibrator to an output of 50 mA at 6 kHz.
