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Good luck Clover. Hope you figg'r that thing out.

Clover I know you don't like hacks and splices but I've wondered if a simple amp clamp (under 50 bucks) from another manufacturer could be wired to the testo plug if you could figure the wiring....

This one?

http://www.trutechtools.com/Testo-Weigh-Scale-for-Refrigerants_p_619.html

There is no mention of the compatibility to the 570 anywhere.

Better talk to that testo rep again......
...

I think Clover is confused with the old generation of testo products which had more features.
Did they stop producing them?

Unless I'm mistaken the 570 has no wireless capabilities like you are posting about..... also the third input is on a separate screen all by itself so you can't see it simultaneously on the manifold...

I thought the accessories were more than a 550 the last time I checked.