Instruction manual

15
4. Functions and Operation
4.6 Statistic Calculation Mode
While STAT. Lamp is on, EP-90 collects each mass value that is printed from the balance and
performs statistical calculations on these values when each set is complete.
4.6.1 Setting statistical calculation mode
Press STAT key when STAT. lamp is off.
STAT. lamp turns on and statistical calculation mode is entered.
(example)
(1) Press STAT key
.
(2) Place a container on the balance.
(3) Press TARE key
.
(4) Place the sample into the container to weigh it.
(5) Print the weighed result by pressing PRINT key
and unload the balance.
(6) Repeat (2) through (5) for the rest of samples in a set. The samples are
automatically numbered in sequence.
(7) When all the samples have been weighed, press STAT key
to print out the
result of statistical calculations for the set of samples. STAT. lamp goes off.
The results of statistic calculation are printed out in the following order.
Order in print out Statistics Symbol in print out Description
1 Number of samples N
2 Total T
3 Maximum MAX
4 Minimum MIN
5 Range RNG = MAX – MIN
6 Mean MEAN = T / N
7 Standard deviation SD
1N
)MEANXi(
2
−
−
∑