Meter Meter In My Hand...Tell Me Tell Me...

No doubt the sample rate is far too slow to capture the pinnacle of a magnetic flux emission.

Cheater...
Note voltage slump. Duplicate with static load.
Note amperes
Two electric heaters in one outlet add up to considerable amperage.
The breaker will trip. How far down did the voltage go before going off line?
Try one heater on 1,500 watts the 2nd on 750

You get the idea.

Appears to have all we need for most checking on an RV
AC/DC Volts (with RMS for AC)
Capacitance (A/C Capacitors)
Frequency (generator RPM)
AC/DC Amps (but here's my question: IS IT PEAK INRUSH, like when a Compressor is starting?)

Worried? Talk to your bank about establishing a special account for things like PayPal. Also good for foreign travel, and ATM scams. If it isn't available they can't scam it.

bang good is a paypal only I think, my visa card says no go to a foreign country purchase

That's pretty cool for sure...

here's another device for your consideration, a blue tooth DMM:

Multi-meter with Blue Tooth

I like being able to hook it up somewhere remote, and go start the engine while monitoring the voltage. And the phone app that you download for it looks and works great.

It is $49, but worth it when you're working by yourself on an electrical problem in a big RV.