Connect AC volt meter
Connect AC volt meter
(OP)
I have a Simpson Model 55 0-150 AC volt meter (iron vane type per the data sheet) that I wish to use to measure the 120 volt line voltage gong to a small (13 amp) electric kiln. (This will be mounted inside a digital controller box I am putting together for the kiln.) I would like to confirm that I run a wire (I plan to use 18 guage) from each terminal on the back of the meter with one going to the to the hot side and the other to the neutral side of the power cord to the kiln. I looked on the web for connection details and this looks like the way to connect, but I would like to be sure before I actually do this.
Would this also be the appropriate forum to ask questions about the PID temperature controller if I have any? I have not started to connect this yet.
Thanks
Would this also be the appropriate forum to ask questions about the PID temperature controller if I have any? I have not started to connect this yet.
Thanks





RE: Connect AC volt meter
Other question sounds fine, but again, if it's a relatively simple question about wiring then people might be hesitant to offer advice that could be misinterpreted. Photos that clearly show your intention would definitely help.
RE: Connect AC volt meter
http://www.simpsonelectric.com/images/File/datashe...
Exact model number: "08470" ?
You're right to double check because there are sometimes meter movements with scales calibrated for the completed instrument.
In this case, the data sheet seems pretty clear that the meter is intended to be connected directly to an input directly matching the scale. The data sheet mentions external divider networks included for the higher voltages.
But in this case, direct connection seems correct.
Beware the terminals with the direct connection to AC. They should be protected from accidental contact by humans.
Beware the 18ga wire protected (not really) by the upstream kiln circuit breaker. If there's a fault at (for example) the meter itself, what prevents those 18ga wires from glowing white hot?
Stand by in case others have more or better info.
RE: Connect AC volt meter
I missed that it's a small 13A kiln, not a 50A monster.
RE: Connect AC volt meter
I am a civil so electronics design is not my strong point, but I put together Heathkit stereos in late 60's and I am comfortable with simple house wiring and understand the dangers of line voltage.
I do appreciate your time and comments. - Don
RE: Connect AC volt meter
I've not (yet?) reviewed the entire diagram.
RE: Connect AC volt meter
Thank you for your comments. -Don
RE: Connect AC volt meter
Thanks - Don
RE: Connect AC volt meter
"Will work for (the memory of) salami"
RE: Connect AC volt meter
The kiln has a theromcouple tied to meter with a temperature scale. The PID temperature controller has a thermocouple that will indicate a temperature on the digital readout and will also allow the controller to turn the SSR on and off. The volt meter is an indicator that adequate voltage is going to the kiln.
Does the data sheet indicate that what I expect would be likely to happen?
Thank you for your interest. - Don
RE: Connect AC volt meter
"Will work for (the memory of) salami"
RE: Connect AC volt meter
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Connect AC volt meter
Some of these PID controllers cycle the SSR using integral cycle control (aka burst control) and use the thermal mass of the heater to act as an integrator. The voltmeter might read some intermediate value although I suspect relating it to heating output might be a bit of a leap of faith.
RE: Connect AC volt meter
I would see it as a major offence if I told a reputable and knowledgeable member that.
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Connect AC volt meter
jraef - no offence intended, I know that you know this stuff inside out.
RE: Connect AC volt meter
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Connect AC volt meter
Thanks - Don