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GENERAL
ELECTRIC
MEDICAL
SYSTEMS
AMX-ll X-RAY UNIT
10-377
12-2 Back-Up Timer Check
1.
Temporarily disconnect the MAS selector lead
' at 3TB1-21 and tape the lead.
2.
Turn circuit breaker and keyed switch ON.
2.83,
Select 50 KVP, and MAS, and make an exposure.
Measure exposure duration with watch or on
scope KVP waveform with horizontal time of
0.5 sec/div.
4.
Exposure should be terminated within 3-1/2
seconds by back-up time delay relay, 3K3.
5.
Turn keyed switch and circuit breaker OFF.
Reconnect MAS switch lead to 3TB1-21.
6.
Record Data
а.
F3382 HEW Test No. 25.
b.
3316 Functional Check No. 5 and 13.
12-3 Battery Load Voltage Check
1.
Turn circuit breaker and keyed switch ON.
sa 2.
Make an exposure at 80 KVP, 200 MAS and
note battery voltage drop between standby,
stator load, and x-ray load.
3.
Voltage drop from standby to stator load should
be from 1 to 1.5 volts and from standby to x-ray
load up to 20.6 to 24 volts.
If voltage drop is in
excess of 25 volts check tightness of primary
terminal and connections to battery.
|f necessary
check each cell group voltage under x-ray load
to locate and correct cause of excessive voltage
drop.
"a 4.
Make a series of exposures at 2 MAS, from 80
to 110 KVP. Observe scope waveform for signs
of arcing or transients.
5.
Turn keyed switch and circuit breaker OFF. Do
not disconnect any test equipment.
411-30
SM AO654E
21815-P10
ILLUSTRATION 4-11-35
Back-up Timer:
50 КУР
V
=
20KVP/DIV
H
=
500 MS/DIV
TRIG
=
Ext. Trigger Circuit
21816-P10
ILLUSTRATION
4-11-36
80/90/100/110 KVP; 2 MAS
V
=
20KVP/DIV
H
=
2MS/DIV
TRIG
=
Ext. Trigger Circuit
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