Need to probe 114 isolated voltages with scope probe

[opampsmoker]

Hi,
We have 114 voltages to probe with the scope on our test board. Needless to say, we need a quick way of doing it. The voltages are isolated from the mains. Each voltage has a different ground reference to the others. Each voltage is about 8V or so.
We need a small probe tip and barrel jack which we can solder into the pcb at each probe point. But do you know of any small ones of these?

I am wondering about a PTH for the probe tip..and an adjacent spade connecter sticking up near it which we can lean the probe ground barrel against.
Any ideas for other cheap, small ways much appreciated.

 

[betwixt]

This sounds like a job for a small test fixture. You are doing it the complicated and expensive way.
Don't solder anything to the PCB, just design it with small test pads where you need to probe. Then using the same PCB coordinates (use the CAD file) drill holes in a firm substrate and mount spring loaded test probe receptacles. When the board is fitted to the fixture a light pressure is placed on the probes and they all connect simultaneously. It is then a fairly simple job to route the probe connection to the scope.

This is how nearly all automated board testers work. The probes are usually routed through a bank of relays to steer the selected one to the measurement equipment.

It is quick, used to test individual components it is normally possible to test several tens per second even when several probes are selected to do multi-point or guarded measurements.

Try searching Farnell for 'pogo pin'.

 

[opampsmoker]

thanks, that is a great way, but this is a one of prototype board, i dont think we can afford the method described.

 

[KlausST]

Hi,

needles and a PCB as adapter is my first choice.

But you may have a look at WÜRTH / WUERTH "WR-WST REDFIT IDC " Nr: 490107671012. They at least need no connector at the DUT PCB.

Klaus