HF Series Generators
LV-DRAC
DR-1004R8
8
1.1 LV-DRAC STATUS DIAGRAM
CHANGE
OF TUBE
ACCELERATION
UP TO 3300 RPM
RUNNING
AT 3300 RPM
BRAKING
FROM 3300 RPM
STAND-BY
ACCELERATION
UP TO 10000 RPM
RUNNING
AT 10000 RPM
BRAKING
FROM 10000 RPM
SELF-RUNNING MODE
1.2 SELF-RUNNING MODE
The continuous starting and braking of the anode produces an overheating in
the X-ray Tube Stator (a.e. during calibration procedure). The “Self-running
mode” avoids this overheating.
In the “Self-running mode” (switch 3243SW4-6 in the “ON” position), the anode
remains running for approximately 1 minute when rotates at 3300 rpm or
10000 rpm.
The LV-DRAC enters in the “Self-running mode” when “Preparation” is selected
three consecutive times only from the Console buttons or Handswitch, and
the time between two of the consecutive accelerations is shorter than
30 seconds (refer to illustration below).
t<30s
PREPARATION SIGNALS
ANODE ROTATION
t<30s t<30s t>30s t<30s t<30s t<tsr
Self-running mode
tsr
Self-running mode
tsr
tsr (time for self-running mode) = approx. 1 minute at 3300 rpm or 10000 rpm.
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