CPI CMP 200 Series Service Manual page 253

Reproducibility, Linearity, & HVL Testing
5.0 H.V.L. EVALUATION (Cont)
ADDED ALUMINUM FILTER
0
0
0
0 (Average of above three readings)
2 (total 2 mm)
1 (total 3 mm)
3 (total 6 mm)
By interpolating the thickness of Al at a relative transmission value of 0.5, it can be seen that the HVL is
approximately 3.3.
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Page 12
DOSE (mGy)
2.17
2.13
2.16
2.15
1.41
1.14
0.61
Table 12: HVL dose values (example)
Figure 3: HVL plot (example)
Rev. C X-Ray Generator Service Manual Supplement
RELATIVE TRANSMISSION
1.00
.66
.53
.28
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