7 Operations Listed By Purposes
81
7
3
3
E
E
n
n
h
h
a
a
n
n
c
c
e
e
T
T
e
e
s
s
t
t
R
R
e
e
s
s
u
u
l
l
t
t
R
R
e
e
l
l
i
i
a
a
b
b
i
i
l
l
i
i
t
t
y
y
What to do
• Use Mastering Compensation
• Use Drift Compensation
• Use Fixed Compensation
• Use Mastering and Drift Compensation together
• Use Noise Reduction
• Use Exhaust Interference Prevention feature
3.1 Setting Mastering Compensation
3.2 Setting Drift Compensation
Drift Compensation is a statistical compensation method. A running average of the latest Pass parts is
used as a compensation value to keep track of moderate changes in the drift portion, such as those caused
by gradual room temperature changes.
In this system, an average value of the previously sampled leak test data of Pass part is used as the average
of the measurement error. This value is subtracted from the measured leakage of the current leak result.
The number of values used in the calculation of this running average is Number of Samples.
When accurate data is not available or the test environment changes rather rapidly, the combined use of
Mastering compensation is recommended. This generates the Mastering value that can be used as the
initial compensation value for the Drift compensation.
Drift Compensation feature is Disable as default.
1)
> Main Menu >Comp > Drift Comp Feature
2)
Select a Channel.
3)
Enable Drift Comp.
4)
Enter 5 to Number of Samples.
5)
Enter 50~80% to Comp Upper Limit.
6)
Enter 0.0 to Comp Lower Limit.
2.1 Setting Mastering Compensation
The figures in this section
are general
recommendation.
NOTE
