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18.16.2. Mass comparison - measurements
When carrying out mass comparison process follow commands displayed in
the COMMAND BAR of the workspace area.
The mass comparison mode enables determining standard deviation that is
calculated on basis of measuring series ABBA or ABA, where
:
A – is a mass standard for control
B – is a tested mass.
The results are calculatded by the software in accordance with below tables
and equations.
For the ABBA series
No.
A
B
B
A
r = B
av
– A
av
1
r
1
2
r
2
3
r
3
4
r
4
5
r
5
…..
…
n
r
n
For the ABA series
No.
A
B
A
r = B – A
av
1
r
1
2
r
2
3
r
3
4
r
4
5
r
5
…..
…
n
r
n
Standard deviation is calculated by consecutive determining of:
1. differences of indications ABBA or ABA for each measuring series:
2.
average value of
the difference between indications ABBA or ABA-
r
i
3. Standard deviation
Содержание MYA 0,8Y
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