A&D HR-250AZ Instruction Manual page 23

1 Press the RE-ZERO key to set the display to zero.
2 Place the sample on the weighing pan and wait for
the stabilization indicator to turn on.
3 Press the PRINT key to add the data displayed to
statistical calculation. The number of data on the upper
left of the display increases by 1.
4 Repeat steps 1 to 3 for each weighing.
Outputting the statistical results
5 Each time the MODE key is pressed, the display changes:
the results as selected in "Statistical function mode output
items (5taf)",
Notes
When the number of data is 1, the coefficient
of variation is displayed as - - - - - - - .
When the average is 0, the coefficient of
variation is displayed as - - - - - - - .
Statistical items are indicated on the upper left
of the display using the following symbols.
Symbol
5um
1max
1min
1r
Range (Maximum – minimum)
1ave
15d
1Cv
Mmax
Relative error of maximum value
%
Mmin
Relative error of minimum value
%
6 While the results are displayed, press the
PRINT key to output the results.
and
Statistical item
Sum
Maximum
Minimum
Average
Standard deviation
Coefficient of variation
.
Outputs the results
To clear
the statistical
data
To delete
the latest data
21
Weighing
pan
Sample
Displays the statistical results
selected in the function table
Output example