Not a TriMetric, but for $20 might be worth trying out...
Bayite DC 6.5V-100V Digital ammeter voltmeter Amazon suggested this for me and I'm thinking for $20 I might just give it a try. Has very good reviews too.
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I have run 76 amps through a 75 mv 50-amp shunt for an hour. The BORG does have an interior fan. But for the heck of it, it's apart again to install a second shunt to give me a proper sense of current balancing.
