Hi all!
I've been given a gaussmeter from my uni, a 70's vintage Systron Donner 3101.
A probe came along with it, but the probe is clearly from a different instrument, since it has a vastly different connector.
I'd like to try and get the probe tested before messing with the huge rack instrument.
Here is what is known:
- It's a flat ceramic chip hall effect device on the end of a probe, model and manufacturer has been too smudged to read. Probe is potted.

- The connector reveals 3 pairs of leads and a shield. I believe the pairs to be coaxial with individual shield:

Connector pin wire colors:
- White + Black
- Red + Black
- Green + Black
- Cable shield
-None of the black wires are connected to each other or to main cable shield.
A hall effect device needs a current between two ports, and a voltage differential is extracted via two others:

Since a pin is lacking for that, it stands to reason the current supply might be using its shield (black wire?) as return,
and the two remaining colored wires are V+ and V-
How will I go about testing this? What voltages/currents are usually used with naked Hall effect devices? Keep in mind, I believe modern Hall effect devices already has a regulator and current reference built in.
Thanks in advance!