Chapter 9
Page no. 1658
JC-CAL-A-003.fm
GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A003 - X-Ray Tube Focal Bias Voltage Scale Factor
a. Select
SETUP/SETUP/3rd pt/CALIB
on the X-ray Console; press the Exposure button
on the
X-ray Console (no X-rays are produced) and hold it until the voltmeter reading stabilizes.
b. Note the focal bias voltage value measured from the voltmeter; release the Exposure button
.
c. Select
SETUP/MEASV
on the X-ray Console.
d. Enter and confirm the measured focal bias voltage value.
7. Fourth calibration point:
a. Select
SETUP/SETUP/4th pt/CALIB
on the X-ray Console; press the Exposure button
on the
X-ray Console (no X-rays are produced) and hold it until the voltmeter reading stabilizes.
b. Note the focal bias voltage value measured from the voltmeter; release the Exposure button
.
c. Select
SETUP/MEASV
on the X-ray Console.
d. Enter and confirm the measured focal bias voltage value.
8. Select
SETUP/SETUP
/CALCUL/VALID
on the X-ray Console. This calculates the parameters K, L,
M and N. The message
CALCUL DONE
appears on the X-ray Console display.
9. Press
SETUP/SETUP/SETUP/SETUP/SETUP/SETUP/CKSUM/CKSUM
on the X-ray Console to
perform a checksum.
6-4
Calibration Accuracy Check
1. Shut down the Senographe system from the Browser.
2. Re-connect flat cable WG8 to the Generator Command Board 400-PL1 connector XJ7.
3. Power on the Senographe system from the X-ray Console.
4. First check point:
a. Select
SETUP/GENE/INSTAL/GENE/GENE/BIAS/VOLTAGE/CHANGE
on the X-ray Console
and note the actual value associated to the tube (see step
b. Enter 3.000E+1V and valid.
c. Press
SETUP/SETUP/SETUP/SETUP/CKSUM/CKSUM
on the X-ray Console to perform a
checksum.
d. Press
SETUP/SETUP/SETUP/SETUP
(i.e. 4 times) on the X-ray Console.
e. Select
30kV/LARGE/MO/MO
on the X-Ray Console.
f. Do a preparation with the Prep button on the X-ray Console.
g. Check that the result is between 28 and 32Vdc.
5. Second check point:
a. Select
SETUP/GENE/INSTAL/GENE/GENE/BIAS/VOLTAGE/CHANGE
on the X-ray Con-
sole.
b. Enter 7.000E+1V and valid.
c. Press
SETUP/SETUP/SETUP/SETUP/CKSUM/CKSUM
on the X-ray Console to perform a
checksum.
d. Press
SETUP/SETUP/SETUP/SETUP
(i.e. 4 times) on the X-ray Console.
e. Select
30kV/LARGE/MO/MO
on the X-ray Console.
f. Do a preparation with the Prep button on the X-ray Console.
g. Check that the result is between 67 and 73Vdc.
6. Third check point:
