The AC-12 and AC-15electronic memory counters with 8, 12 or 15 keys simplify blood count analysis. Counting is stopped automatically upon reaching a full hundred. Counting beyond a hundred is possible to a maximum of 1000.

Counting can be stopped at any number required. The stored results can be displayed as absolute or percentage values, with switching between the two display modes as often as required.

Briefly pressing the Clear key has no effect, thus ensuring that no data is deleted unintentionally. The memory is not cleared until the key is kept depressed for approx. 1 to 2 seconds.

The last entry in a sub-memory can be deleted from the sub-memory and the total memory using the "error corr".