I scored this thing for a good price online and would love some input.
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4897_1600.jpg)
First the good - it seems to work!
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)
The Variac portion works great, and from what I can tell, the mains are indeed isolated as desired. Here are some gut shots:
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4940_1600.jpg)
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4944_1600.jpg)
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4965_1600.jpg)
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4938_1600.jpg)
My concern is that the three-prong outlets on the front are grounded to the chassis. I've read countless contradictory articles about why this is good vs. bad, but I bought it for isolation of DUT for my scope, so I'm thinking for that purpose it may not be the right solution.
Where I'm getting a bit confused is with these readings:
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4973_1600.jpg)
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4976_1600.jpg)
Both hot and neutral to ground are open until it's turned on, after which the meter will register 8M resistance.
![](http://www.gad.net/GAD/Photos/TestEquipment/5D3_4969_1600.jpg)
Are these readings normal given that the hot/neutral are isolated but the ground/chassis is not? The concept kind of hurts my head and it's been a long day.