GE AMX-II

GENERAL ELECTRIC MEDICAL SYSTEMS
AMX-ll X-RAY UNIT
1-1880 SM A0654E
2a. Turn circuit breaker
and standby switch OFF.
2b. Disconnect MAS Select-
or lead at 3TB1-21 and tape:
2c. Set KVP selector at 50.
4,823. Make an exposure and
a. 。 .
time exposure duration with
sweep second hand of watch.
2e. Turn power OFF and
reconnect MAS selector
tead at 3TB1-21.
Exposure should terminate within 3 to
3:4 + .2 seconds by safety back-up
timer.
3K3 Time delay relay.
Schematic reference
78,D.
3-5 H.V. Divider Check of KVP Calibration and MA.
OPERATION
RESULTS EXPECTED SERVICE REFERENCE
a. Connect calibrated H.V.
Divider and dual trace scope
as shown in III. 5-2.
Connect 0-150 DCMA meter
in MA+ and MA- Jacks on
Panel 3.
Connect 0-200 DCV Digital
Voltmeter to 3TB1-27(+)
and 3TB1-5(-).
b. Turn circuit breaker
and stand-by switch ON.
Note battery voltage.
2-4 с. Discharge or charge
battery for a voltage
between 110 and
120 volts. If nec-
essary, make ex-
posures at 80 KVP,
200 MAS. Rest one
minute between ex-
posures.
aa. Make an x-ray ex-
posure at 80 KVP, 4 MAS,
Measure KVP.
Battery voltage will depend on state of
charge. For this test must be between
110 and 120 volts.
Addition of H.V. Divider and 5 feet (1.5 m)
H.V. cables will alter MA setting. Adjust
3A2R34 if necessary for 100 MA +/- 1.
Compare scope waveform will 11. 5-3.
KVP should be 80 (+(10 KVP +5%)) (-(5
KVP +5%)). Check during last 20 milli-
seconds of exposure as MA stabilizer does
affect KVP during first 20 milliseconds.
Refer to Direction
13288A for use and
calibration of H.V.
Divider
with oscilloscope.
X-ray tube current;
Chapter 4, Sec. 2-4.