GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card CHK A011 - Check kVp settings
Page no. 1749
Chapter 9
JC-CHK-A-011.fm
7-3
kVp measurements - RMI 232 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. Set the waveform selector to CP (constant potential).
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. Use the kVp correction values noted above to calculate and enter
Corrected kVp
values.
6. For the check to be passed, each of the
Corrected kVp
values must lie between the specified
Upper
and
Lower Limits
.
7. If the check fails at any value, repeat the complete procedure.
8. 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
Corrected
KVp
Upper Limit
(S+3%)
Lower Limit
(S-3%)
Result
Pass/Fail
0.3
50
26
26.78
25.22
0.3
50
28
28.84
27.16
0.3
50
30
30.90
29.10
0.3
50
32
32.96
31.04
