I am working on a voltmeter and the tolerance for it is 0.25% ∀ 1 digit. I am not sure what exactly what this means. I am guessing if my value was 19.95 'for all' could mean I have a range of 19.94 and 19.96?
That sounds like some kind of a font encoding error. A typical spec is 0.25% + 1 digit.
So a 19.95 input could read 19.80 to 20.01.
We often see a font error in pdf files where \$\Omega\$ is intended but it comes out as a W.
Edit: With enough of the manual now presented to access it on the net, we can come to a conclusion. As Dave Tweed suggested in a comment, it's from ±. The previous version to the current manual (3.2 vs. 4.0b) has the correct character.