| See all
the A&D products we offer | home
Most of the
A&D precision balances we offer features a counting
mode function. We offer A&D
Counting Scales specifically for counting parts, but
when the parts start to become very small (lighter than
0.1 gram - a dollar bill weighs about 1 gram so it you cut
a $1 bill in 10 equal pieces each piece would weigh approximately
0.1g) we recommend a precision balance like the A&D
like to achieve a more precise count for small parts.
Often balances with a counting feature are required for
inventory control, incoming inspections, counting small
parts or pharmaceuticals.
balances count by calculating the average weight of one
piece-weight called a unit weight, then applying it to the
total weight of what you are trying to count. A&D
has added exclusive software call ACAI (Automatic Counting
Accuracy Improvement) that continuously recalculates and
updates the average piece weight to ensure optimum count
accuracy even with very small parts.
balance calculates the unit weight, the higher the number
of items in the sample, the higher the accuracy.
If you use 10 very small parts as your sample, with a unit
weight of 0.1000 grams calculated by the balance.
Using the ACAI feature, after 200 parts were counted, the
updated unit weight was 0.0995 grams. This does not
seem like a significant difference, but the count could
have been off by 1 part at a count of 200, 2 parts at 400,
0.0995 = 0.0005g
200 parts = 0.1000g or 1 part
not be acceptable if the part is expensive. This would
be totally unacceptable to a purchaser if he stopped to
count the parts.
To use ACAI,
Follow the steps outlined:
select "PCs" using the "MODE"
key (If you want to clear the current unit, press the "SAMPLE"
"RE_ZERO" key to
clear any offset from zero, such as a container to hold
the items to be counted.
If you want to change number of items used as the sample
quantity, press the "PRINT"
key to select the number of items to be used for the sample.
This may be set to 10, 20, 30, 40, 50, 60, 70, 80, 90 or
100. (The higher the number, the better the accuracy.)
Place the sample to be counted on the pan (this will normally
be the same quantity as the count displayed.)
Wait for the "stabilization mark" to become illuminate
on the LCD. Press the "SAMPLE"
key. The balance will calculate the unit weight and
store it (this value is saved, even if the balance is turned
off.) If the sample is very light, the balance may
not be able to calculate the unit weight. We recommend
the minimum individual (1 piece) part weight should be greater
than or equal to 2X "D" ("D" is the
division or graduation of the balance.)
Add a small number of additional parts (it is not necessary
to count the added number.)
Allow the ACAI indicator on the LCD to blink several times
then stay on. Then the ACAI indicator will turn off
and the unit weight data is updated. Wait for the
ACAI indicator to turn off, as this indicates that the balance
has updated the unit weight.
Repeat steps 5 and
6, each time approximately
doubling the amount added. Continue this process until
you reach the desired count or capacity of the balance.
ACAI stores the corrected unit weight in memory until a
new sample is established or the process is repeated.
samples according to the table to best use the ACAI function
on the weighing pan
total count on the weighing pan
necessary, but greater than the current count plus