Chapter 12: Qualification Reports
ValProbe RT User Manual 131
In the configuration of the Pass / Fail Report, the User can select which Cycle from the Qual
File to utilize for the analysis.
Once the Cycle is defined, the User can delay the Cycle Pass / Fail evaluation by a defined
number of samples. The number of samples times the sampling rate defines the delay time.
This delay allows the cycle to stabilize or equilibrate prior to evaluation.
The Pass / Fail Report analysis for the cycle consist of two types of calculations: Statistical
calculations and Accumulation calculations. The following sections and diagram define the
time stamps and data used for the calculations.
Statistical Calculations
All values are calculated from the data point values of the defined cycle. As the stop of the
study is also the same timestamp and data for the start of the next cycle, it is NOT included
into the statistical calculations unless it is the Qual End event.
Accumulation Calculations
Accumulation calculations look at the data samples and interval of time between two samples
and accumulate them over the duration of the cycle. Typical calculations include Lethality,
Cycle, and Time above / below Process Temp.
For Lethality, the system measures the temperature and calculates the instantaneous lethality
for each data sample. The calculation then factors in the interval times between data samples
to integrate the Accumulated Lethality over the complete cycle
For Cycle / Exposure Time, the Start and End of the cycle are triggered by manual or
automated events, timestamps are generated for these events whenever they occur. The
calculation accumulates the total time from the Start of the cycle to the end of the cycle,
considering all intervals
For Equilibration Time, the calculation is only enabled if the Setup is defined with a one
second sample / storage rate. The calculation starts when the first sample where the reference
temp reaches the process setpoint, and ends when sample temperatures reach the process
temp. For Time at / below Process Temperature per Sensor, the system accumulates time for
each sample interval, only if both the data points at the beginning and end of the sample
interval are beyond (above / at / below) the defined condition.
For Time at / below Process Temperature per Sensor, the system accumulates time for each
sample interval A1/A2, A2/A3...A5/B1 only if both, the data points at the beginning and end of
the sample interval are beyond (above/at/below) the defined condition.
If for example, a data point (A1) has reached the given criterion threshold, the system checks
if the next data point (A2) has reached the given criterion threshold as well. In that case, the
interval between the data points are counted toward the accumulated value.
To Next Page
Loading...