Since I'm asking dumb questions:
Does having two volt meters in series significantly affect the reading?
V=IR implies that it should, because presumably the second volt meter
adds a little more resistance.
I have a battery charger with temperature compensation, so it comes with
a thermocouple that you put near the batteries. I thought it would be
convenient to wire a site monitor volt meter in series with it so I
could record whatever readings the battery charger is getting.
A shunt on AC will give you an AC voltage proportional to AC current.
If your monitoring device is OK with AC input then, yes, you can do it
that way. But if it is a sitemonitor, I don't think it will like AC
so much. And the output will have reference to the AC, in other words
it will be hot.
Normally you use a current transformer to measure AC. You can follow
up the current transformer with a diode bridge and cap or get one that
has a DC output.
This might work:
http://www.phidgets.com/products.php?product_id=3502
Not sure the range of the inputs but yes, if an input has a voltage
range that will cover your thermocouple it will indeed read it.
-----Original Message----- From: Adam Moffett
Sent: Tuesday, April 07, 2015 1:20 PM
To: [email protected]
Subject: [AFMUG] Dumb shunt question
This might be a dumb question:
Can I use a packetflux current shunt to measure current on AC, or are
they strictly for DC?
Ok, I have a second dumb question:
The shunt input on a Site Monitor II is just measuring microvolts
right? So if I'm not using it for a shunt, can I instead use that for a
thermocouple temperature probe?
