Why won't the Mastertronic test below 7 mil in the vial?
When the Mastertronic skips a test there is normally not enough regent in the vial to do the test. Even though it says
10 mil it may need to take more than 3mil for a test which the needle cannot pass.
This is also leads to the question above that the MT can't go below the 7mil measurement because of the Stir Bar.
If we allowed it to, the needle could hit the bar on entry and bend because it does not know where the bar is in the Vial.