BFGoodrich PS-823 - Page 48

BFGoodrich Avionics Systems,
Inc.
Component
Maintenance
Manual
P/N
101-1075-()
Corrective
Test Procedure Normal
Indication
Active
2.7
Cont.
f.
Release
PUSH TO READ switch and place
ON-
OFF-CHARGE
switch OFF.
2.8
Inverter
Output Voltage (4.6
Vac)
a. Perform
test
2.2 steps a
and b.
b. Connect the
true
RMS
voltmeter,
frequency
counter,
and oscilloscope across
TP-10
and
TP-I
(GND)
c.
Place
PWR
switch
ON.
The voltmeter
indicates
4.6Vac
+7%
-10%.
d.
Place
the
ON-OFF-CHARGE
switch
ON,
and
The
oscilloscope
presents
monitor
the voltmeter,
frequency
counter,
and
a
square
wave.
oscilloscope·
The
frequency
counter
registers
400 ±8Hz.
e.
Place the
ON-OFF-CHARGE
switch OFF.
2.9
Inverter
Output Voltage
(26.0Vac)
a. Perform test 2.2 steps a and b.
b.
Connect the true
RMS voltmeter,
frequency counter
and
oscilloscope across
TP-11
and
TP-1
(GND)
c.
Place
the
PWR switch
ON.
The voltmeter indicates
26.0Vac
+7%,
-10%.
d.
Place the
ON-OFF-CHARGE
switch ON,
and
The
oscilloscope
presents
monitor
the voltmeter,
frequency
counter,
and
a
square
wave.
oscilloscope·
The
frequency
counter
registers 400 ±8Hz.
e.
Place the
ON-OFF-CHARGE
switch OFF.
2.10
Shifted
Phase Voltage
a.
Perform
test
2.2 steps a and b.
b.
Connect
the
true RMS voltmeter
across
TP-2
and
TP-1
(GND).
c.
Place
F-C
switch
to F.
d.
Place PWR switch ON.
e.
Place the
ON-OFF-CHARGE
switch
ON,
and
The voltmeter
shall
monitor
the
voltmeter.
indicate 90 ±5.0Vac
f. Place the
ON-OFF-CHARGE
switch OFF.
before time
out
and 110
±6.0Vac after 4 minutes
forthe
PS-823A,
B,
E,
F.
(93 ±5.0Vac, 110
±7.0Vac and 7 minutes
for
PS-823C,
D, G,
H).
I
Performance
Test
with
JT-5
Test Set
Figure 115
(Cont.)
msmijtp202TestFaultIsodiskl59
24-20-03
Page 128
Revision A
June
30, 1999