Tomorrow I am collecting a Hameg 303-6 oscilloscope.
It is long drive and the guy maybe has other items that I would regret not asking about while there, hence this post to figure out what I might need, and he may have.
The problem I can foresee is...
I run a diesel generator that produces about 55v ac which is then rectified to dc and this is connected directly to my off grid battery bank to give the batteries a bit more charge during prolonged gloomy periods in the winter. This puts ripple on the dc battery cabling and input to our inverters.
We also have a solar charge controller that has a pwm output that also puts ripple on the dc battery cabling and input to our inverters.
I would like to measure this ripple....but...
The oscilloscope would be running from the power coming from one of our inverters. The negative side of the battery bank is linked inside the inverter to the neutral side of the ac output and also earth. I am thinking this may cause me a grounding loop or some weirdness arriving from the negative battery connection to inverter neutral and earth to oscilloscope earth to the ground side of the oscilloscope probe. Maybe this is ok if all these 'low level' items are all sitting at 0v?
The positive side of the battery cabling sits around 50 - 58v so I may need to get a higher voltage probe for that ? unless I probe a potential divider I could make up?
I would like to go armed with a bit of a shopping list as the guy selling me the oscilloscope may have useful items tucked in drawers I have not yet learnt that I need. I don't want to drive hundreds of miles and then think 'I wish I had asked....'