Electronic – Best humidity level for electronic shops

It sounds like you don't have an external reset signal to respond to, you just want to count to some number then go to zero as the next step. You could consider this a mod n counter, where n is one more than the maximum count in your counter.

So I'm not sure what you mean about "losing a signal" while doing the reset. If you had a 3-digit decimal counter and it rolled over from 999 to 000, you wouldn't consider it as "losing a signal", it would just be counting to the next value in mod-1000 arithmetic.

So if you do

always @(posedge clock) begin
    if (counter == some_number) begin
         counter <= 0;
    end
    else begin
        counter <= counter + 1;
    end
end

You'll have a counter that counts continuously in mod-some_number+1 arithmetic. Alternately you could say it counts to some_number, then resets to zero without ever "losing" a clock pulse.

If some_number+1 happens to be a power of 2, you don't even need the reset condition in your code. For example, for a mod-16 counter, you can just use a 4-bit counter, and the synthesized logic will count continuously and repeatedly from 0 to 15.

From Henry Ott re: static discharge (ch 15.3) in "Electromagnetic Compatibility Engineering"

Charge accumulated on an object leaves the object by one of two ways, leakage or arcing. Because it is better to avoid arcing, leakage is the preferred way to discharge an object. Charge can leak off an object through the air, because of humidity. The higher humidity, the faster the charge will leak off the object.

Temperature affects humidity, so that is where the temperature sensitivity arises. Temperature per se does not directly affect ESD conditions.

One techniques that is used , aside from ground straps etc. is the use of ionizers on benches when there is extreme ESD sensitivity.

MIL-STD-1695 addresses relative humidity levels between 30 - 70 percent in areas where electronic parts and hybrid microcircuits are handled or processed.