GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A007 - Automatic X-ray Tube Warm-Up
Page no. 1661
Chapter 9
JC-CAL-A-007.fm
Job Card CAL A007 - Automatic X-ray Tube Warm-Up
Chapter 9
1
SUPPLIES
None
2
TOOLS
None
3
REQUIRED EFFORT
Personnel: 1 Field Engineer
Time: 27 minutes
4
SAFETY PRECAUTIONS
CAUTION
These procedures produce X-rays. Be sure to take appropriate precautions.
5
PREREQUISITES
This procedure should only be used when excessive arcing has made it impossible to carry out the pro-
cedure described in
Job Card CAL A012 - X-Ray Tube Heater Current
6
PROCEDURE
This procedure is to be used for re-starting an X-ray tube which was known to be good upon leaving the
factory, but now exhibits arcing after a long period of inactivity.
The principle is to take a series of 12 pre-determined exposures, starting at low kV values and progres-
sively increasing towards high kV values. If arcing occurs during an exposure, some or all exposures are
automatically repeated. If persistent arcing occurs, the warm-up procedure is automatically terminated.
Proceed as follows:
1. Select
SETUP/GENE/INSTAL/GENE/GENE/TUBE/WarmUp
on the X-ray Console. The track/kV
combination for the first exposure should appear on the X-ray Console display.
2. Press the Exposure button
on the X-ray Console and HOLD IT DOWN while the exposures are
taken.
Note:
There is a time delay of 10 seconds between exposures. You can release the Exposure button
during this 10 second period, then press it again to continue, but the minimum time between ex-
posures will still be 10 seconds. If the tube overheats at some point, exposures will be inhibited
until it cools down again. During the cooling period, the Exposure button
can be released; as
soon as the display shows that the X-ray tube has sufficiently cooled, press the Exposure button
to continue.
3. When the warm-up procedure is finished, the message
Tube OK
normally appears on the X-ray Con-
sole display. If persistent arcing occurred during the procedures, the message
Too many spits
appears on the X-ray Console display.
