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.
Forum Discussion
The inexpensive 100 amp Drok voltmeter/ammeter I employed on a project had no choice but to be wired on the (-). It was not very accurate either outside a 2 to 35 amp range.
It would read 0.0 amps when 0.72 amps were still flowing. Could not calibrate it any closer.
for sub 40 amp loads I use this on some devices:
http://www.amazon.com/WindyNation-AccuMax-Ammeter-Power-Analyzer/dp/B014KAT6ZA/ref=sr_1_49?ie=UTF8&qid=1459137780&sr=8-49&keywords=Power+Analyzer
Mine are actually different versions of that the above link, that came with aluminum 12awg leads, but I removed them and soldered 8awg leads to circuit board and use 45 amp Anderson powerpoles to splice it inline on most any of my loads, or charging sources.
With a load and source side, it only measures current flowing in one direction, but the AH and WH readings are very useful
It would read 0.0 amps when 0.72 amps were still flowing. Could not calibrate it any closer.
for sub 40 amp loads I use this on some devices:
http://www.amazon.com/WindyNation-AccuMax-Ammeter-Power-Analyzer/dp/B014KAT6ZA/ref=sr_1_49?ie=UTF8&qid=1459137780&sr=8-49&keywords=Power+Analyzer
Mine are actually different versions of that the above link, that came with aluminum 12awg leads, but I removed them and soldered 8awg leads to circuit board and use 45 amp Anderson powerpoles to splice it inline on most any of my loads, or charging sources.
With a load and source side, it only measures current flowing in one direction, but the AH and WH readings are very useful
