80 volt plus power supply

Joined: 11 May 2004 Location: Toowoomba

Hi all. I am looking for ideas for powering 80 to 240 volt on board for this gauge unit. the unit I want is a double gauge type for the input and out put temps for a water intercooler
http://auberins.com/index.php?main_page=index&cPath=1
cheers Phill

Joined: 30 Dec 2002 Location: Adelaide

Probably the cheapest / easiest way would be to buy one of those small modified sine wave invertors. They're really cheap these days.

If you just want to read temps you'd possibly be better off looking at something else?

Joined: 25 Oct 2003 Location: Melbourne Australia

To be honest I would just look for something that's already 12V. There are so many options for this.

Even the last one on that page you linked to is 12V.

Joined: 28 Sep 2005

These are three-term industrial temperature controllers, can't see what use you'd have for such.
I think you're looking for temperature indicators, and as chimpboy said, you'd be better finding something native to 12VDC.

ed

Joined: 11 Jan 2004 Location: Adelaide

Thylacine wrote:

These are three-term industrial temperature controllers, can't see what use you'd have for such.
I think you're looking for temperature indicators, and as chimpboy said, you'd be better finding something native to 12VDC.

ed

If it's for a water intercooler he could want a controller.

I agree on the 12VDC call. Is there a particular reason you want a higher voltage unit?

Joined: 28 Sep 2005

Just deleted a very long post explaining why three-term (PID) control is unusable in this situation when I noticed that they have
relay output models.
PID is commonly a variable output analogue signal (4 - 20mA, 1 - 5V, etc) and hence unachievable via on/off switching.
Bastards will say anything when describing an item for sale.
Another example of the accuracy of manufacturer's specifications.

ed

Joined: 28 Sep 2005

If you are in need of non-standard auto gear, google "process control" and "instrumentation".
All measurement/control systems in refineries, oil rigs, mines, etc run on 24VDC which is a lot easier to achieve in a car.
Sorry that I can't be more specific re sources but I've been out of the game for a few years now.

ed

Joined: 11 May 2004 Location: Toowoomba

Basically what I was looking for was to run a gauge unit that displayed two temp readings, one from one side of the intercooler and the other on the other side, this would display before and after temps, thus checking the efficiency of the cooler, this would mainly be to set up and monitor a new installation. I have fitted a water to air cooler unit and am noting that the water out put is not very hot, either it works very well or it is not flowing correctly!

Joined: 25 Oct 2003 Location: Melbourne Australia

The goal is good, but the choice of instrument still needs work Smile

Joined: 28 May 2004 Location: Perth, WA

Id agree with finding another instrument. Id actually look at making one up from scratch with a mircocontroller and what not if I were doing it but that might not be of any interest to you.

If you insist on those units the best bet would be a small cheap inverter and run it on 240VAC as previously suggested. The dc input is usually designed to run off the 110VDC battery back up systems.

If you only want temp readings why not just get two automotive temp gauges and senders and put them at each end??

Joined: 25 Oct 2003 Location: Melbourne Australia

stuee wrote:

If you only want temp readings why not just get two automotive temp gauges and senders and put them at each end??

Bingo... imho.

Joined: 29 May 2006 Location: Melbourne

couple of cheap multimeter's an 2 K type thermocouples, will be more accurate than using traditional auto temp gauges.