Have the DMM measure quite well an oscillating DC

[abdulbadii]

How can our handheld DMM measure pretty well an oscillating DC current ?

[bob91343]

What exactly are you trying to measure?  With what equipment?

[Fungus]

How can our handheld DMM measure pretty well an oscillating DC current ?

You're going to need to define "oscillating DC current" very clearly before you get an answer that isn't "use an oscilloscope".

[Grandchuck]

Are you asking about ac ripple riding on a dc signal?

[Gregg]

Perhaps a DMM that measures duty cycle.

[tggzzz]

How can our handheld DMM measure pretty well an oscillating DC current ?

A good starting point for the OP would be https://entertaininghacks.wordpress.com/library-2/good-questions-pique-our-interest-and-dont-waste-our-time-2/

[Wallace Gasiewicz]

If there is an AC voltage of any significance the modern good  hand held (like a Fluke) will measure only the AC voltage.in AC mode
If there is also DC voltage it will measure that separately in DC mode.
It will not add them together. A fancy bench meter like an HP 3456 will add them together, if you want it to.
For your specific meter, you would have to read the instructions, some of these things work a bit differently than others.

Some old fashioned analog meters add the DC to the AC volts in normal AC mode and some analog meters can measure AC separately, using a blocking capacitor.
Some fancier analog meters work like a modern hand held and use the same sort of transistor circuitry, these things are not common.

I do not think these meters are suitable for measuring ripple, it would have to be a pretty high ripple to even show up and ripple can be in higher freq than the meter can rectify to measure