Behringer Cable Testers (CT100 & CT200)

I have both of the above cable test boxes for comparison.

The voltage that I measure on the test tones outputs is different for both units.

How should I be measuring the output with a multimeter (AC/DC) and between which pins on the output XLR connector?

The levels to measure are:

+4dBu
-10dBV
-50dBV (Mic)