Heat Penetration Studies of the retort of sterilizer are conducted by using distributed temperature measuring sensors or wireless datalogger to determine the heating & cooling characteristics of a product or package in a retort system for the establishment of a safe & optimum thermal process to deliver a sterile product.
General or Ball Formula Method:
a. Calculation of heating rate factor, the slope of the heating curve, fh
b. Calculation of value of dimensionless lag factor, jch
c. Calculation of Total process time, B = fh [log (jch·Ih) – log g],
d. Calculation of process time, Pt = B – 0.42 CUT
e. Calculation of Ball process Lethality, Fo = fh/[(fh/U) x Fi]
a. Calculation of heating rate factor, the slope of the heating curve, fh
b. Calculation of value of dimensionless lag factor, jch
c. Calculation of Total process time, B = fh [log (jch·Ih) – log g],
d. Calculation of process time, Pt = B – 0.42 CUT
e. Calculation of Ball process Lethality, Fo = fh/[(fh/U) x Fi]
US 15788 
GB 12796 
CA 10639 
AU 9667 
IE 5615 
BR 3158 
NZ 1699 
SG 1039 
