A&D BA-T Series, Инструкция по эксплуатации

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Statistical calculation function
Usage
This mode processes weighing values statistically and displays/outputs the result.
Calculation items available for display/output include the number of data, sum, maximum, minimum,
range (Max-Min), mean, standard deviation, coefficient of variation and relative error. You can select
these output data in four steps on the [Statistical calculation setting] screen.
You can delete incorrectly input data from the [Statistical calculation results] screen.
Statistical results are initialized if the statistical calculation function is disabled or the power is turned off.
The standard deviation, coefficient of variation and relative error are calculated with the following
formulas.
Standard deviation
＝
N
･
Σ (X
i
)
2
- ( Σ X
i
)
2
N
･
( N - 1)
Where X
i
is the
i
th weighing value and
N is the number of data.
Coefficient of variation (CV)
＝
Standard deviation
Mean
･
100 (%)
Relative error of the maximum value (MAX%)
＝
Maximum - Mean
Mean
･
100 (%)
Relative error of the minimum value (MIN%)
＝
Minimum - Mean
Mean
･
100 (%)
If the minimum display digit is disabled for any data, the calculation result is displayed with the minimum
display digit disabled.
(The minimum display digit is rounded off)
If the statistical calculation function is enabled, you cannot change the application, unit of measure or
readability.
If you configure this display, the HOME screen changes to the weighing screen with the statistical
calculation function.
Display settings: HOME key
APP button [Application] settings screen
Statistical calculation function button Select [ON].
HOME key Weighing screen with the statistical calculation function
1 Statistical calculation results button
2 PRINT button
Name Description
1
Statistical calculation results
button
Displays the [Statistical calculation results] screen.
Also displays the number of input data.
The number of data is displayed within the range from 000 to 999.
2 PRINT button
Adds data to be used for statistical calculation.
Also outputs data to the device connected to the balance.
This is the screen for the statistical calculation function.