∀ (for all) in voltmeter specification
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.