Looks good, a few concerns.
It would have been better, of course, had you used the term "non-simultaneous" in the written description and defined it. That said, by default, a non-simultaneous event will likely be any event that is not considered simultaneous.
If such is OK then no problem.
(2) "preselected" v "predefined"
I do not know how your written description covers such term so I cannot say for sure in your specific case which is better. That said, I personally prefer "predefined" over "preselected".
Likely not a huge deal but just a preference thing.
(3) "upon detection"
Note the following :
(a) ". . . incrementing one event counter upon an occurrence of NON-SIMULTANEOUS events, and . . . "
now note the following
(b) ". . . incrementing one event counter upon detection of simultaneous events by said electric apparatus. . . . "
note in (a) upon occurrence of non-simultaneous events
(b) upon detection of simultaneous events
Is this correct ? Just seems both need to be "detected" Depends on the written description
(4) "is" v "comprising"
3. The method of claim 1, wherein said preselected event is . . . .
the following is better:
3. The method of claim 1, wherein said preselected event comprises . . . .
Looks good overall.