analog and digital 30V Voltmeter for Power Supplies

This is a question to those who have tried both 30v analog voltmeter and Digital.

I have this 30V Digital Voltmeter that I want to pair to my LM317 variable voltage regulator...
Anything around 3V and above looks ok - there's that red display lighting up, but when the voltages are lesser than 3V, the display starts to turn off... (there's only two wires on this voltmeter, positive and negative.).. I needed it to display if its running 1v or 2v or 2.5v...

What I'm curious about is that...
Does this problem exist in 30V analog voltmeters?
And, do other 30v digital voltmeters have the same limitation?

 

thats what i observe... i'm not advanced enough to be able to modify it either so i'm looking towards other options if an analog ones could work and I didn't wanna buy one unless its possible.

 

Thanks a lot for all your replies
I'll try the analog one and if not, i'll try to find those digital ones with three wires if they're available on a few local stores around