GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card CHK A011 - Check kVp settings
Page no. 1753
Chapter 9
JC-CHK-A-011.fm
9-3
kVp measurements - Keithley 35080B KVp meter
Make a series of kVp measurements, as follows:
1. Set the X-ray field to the smallest size greater than the kVp meter measurement area shown on the
meter.
2. Switch on the meter.
3. Select manual exposure mode, and set the X-ray parameters to:
Mo track/Mo filter, 50 mAs, LF
4. Make exposures at the
Selected kVp
values shown in the table below. For each exposure note the
Measured kVp
value shown on the meter.:
5. For the check to be passed, each of the
Measured kVp
values must lie between the specified
Upper
and
Lower Limits
.
6. If the check fails at any value, repeat the complete procedure.
7. If the repeated check fails again, kVp calibration is necessary. Perform the procedure described in
Job Card CAL A011 - Calibration of kV Scale Factor
Focus
mAs
Selected
KVp (S)
Measured
KVp
Upper Limit
(S+0.5 kV)
Lower Limit
(S-0.5 kV)
Result
Pass/Fail
0.3
50
26
26.50
25.50
0.3
50
28
28.50
27.50
0.3
50
30
30.50
29.50
0.3
50
32
32.50
31.50
