Have you looked into getting an ungrounded probe? They are the best for noise problems but
may add a small time delay.
You could get one with a stainless steel braided jacket that would prevent inductive
noise. Then the jacket could be grounded to the same ground of the roaster.
People experiencing inductive noise usually use a naked thermocouple with the wire
becoming a receiving antenna for all shorts of noises coming from nearby electric motors.
They may run about $40 each at Omega.com
. I would get one with a long cable so as to keep
the meter away from the roaster.
--- On Fri, 5/31/13, John Brinkman <brinkman.john(a)gmail.com> wrote:
From: John Brinkman <brinkman.john(a)gmail.com>
Subject: [Artisan-user] Suggested Instrument
Date: Friday, May 31, 2013, 4:13 AM
I am considering using an Amprobe TMD-56 for collecting two temperature readings from my
friends Barth roaster. We have been having issues with earth leakage on the roaster
causing issues with the Arduino/TC4 system we currently have to the point that he is
unable to use it.
Has anyone here got any experience with the TMD-56 and earth leakage? I am wondering how
the USB connection works. We have a pair of Victor 56C DMM's that have an optical
connection on the USB that isolates the DMM from the laptop and seems to sort out the
issue. Any idea if the USB on the Amprobe is isolated as well? It doesn't say anything
in the manual.
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