Example Problem 1.
GIVEN:
Rt = 200 cGyph at H + 5 hours.
FIND:
R1.
SOLUTION:
Align the hairline with the 5-hour tickmark of the 1.2 (index)
scale and the 200 cGyph point on the Rt scale. Read the dose
rate at H + 1 as 1350 cGyph at the point of intersection of
the hairline with the R1 scale.
ANSWER:
1350 cGyph.
Example Problem 2.
GIVEN:
R1 = 1000 cGyph.
FIND:
Rt at H + 6 hours.
SOLUTION:
Align the hairline with the 6-hour tickmark of the index scale
and the 1000 cGyph point on the Rt scale.
Read Rt as 120
cGyph at the point of the intersection of the hairline with
the Rt scale.
ANSWER:
120 cGyph.
Example Problem 3.
GIVEN:
R1 = 1000 cGyph.
FIND:
Time when Rt = 700 cGyph.
SOLUTION:
Connect 1000 cGyph on the R1 scale and 700 cGyph on the the R1
scale with the hairline.
Read time as H + 1.4 hours at the
point of intersection of the hairline and the index scale.
ANSWER:
H + 1.4 hours.
5-7
CM5206
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