Not a TriMetric, but for $20 might be worth trying out...

westend wrote:

marquette wrote:
I got my meter today. What is the correct way to mount the shunt? Does it need to be insulated from the frame?

It is built with an insulator from frame. The current travels through the plate bundle which is not connected to the mounting base. Bolt it on and connect your cables and sensing wires.

?? Perhaps I misunderstood, but ...
The shunt I got has no base, insulated or otherwise.
Each end is a metal block with a big bolt through it.
One end will be bolted to neg terminal.
The other will have all neg leads bolted to it.
So it should be isolated from the frame.