Oh thank you so much.Do they make a megger 1722 ??
The megger 1700 series should be able to measure AC/DC voltage from 10V to 600V.
Set the Main rotary range knob to volts
(The position of the right-hand rotary range knob does not matter)
Using two test leads, connect test leads to the L1 (+ve) and L2 (-ve) terminals.
Taking a voltage measurement of a car battery isn't a definitive way of telling if the battery is any good.