I think the control solution they provide you with a meter is "deception." The control solution is to check if the meter has totally failed, not to calibrate. I can't remember the last time I used the control solution. If I get a weird test, I repeat it with more controlled conditions and if again it is weird, I try with another meter and a different test strip batch. If that all suggests the meters is whacked, what is the point of the control solution I already know the meter failed.
And meters are only good for +/- 20%. If you look at the allowable range on the vial, it is often 15-20%. My onetouch ultras are now 15%. So you can't use the control solution to assure accuracy any closer than that range. Useless. And you certainly can't use the control solution to calibrate the meter, even if it was an actual reference, you can't adjust anything to calibrate it.
Besides, the control solution is "bad" within three months. If anyone has actually replaced their expired solution, I'd like them to raise their hand. Try asking for a replacement control solution at your pharmacy, they don't have it and suggest you call the manufacturer. They probably then go back into the back room where they keep the good drugs and laugh about it.
So I think control solution is a "deception" aimed at making you think the meter is actually accurate because it can be calibrated (when it actually cannot be calibrated).
ps. The only possible use for control solution might be as a last resort to treat a hypo, except you would walk around with a blue mouth.