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Looking for a good portable power supply #207456 10/30/12 03:00 PM
Joined: Jul 2007
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sparkyinak Offline OP
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I am in the market for a good manufacter or power supply thats portable for calibrating meters in the field, bench testing equipment, circuits and such. Any suggestions?


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Re: Looking for a good portable power supply [Re: sparkyinak] #207461 10/30/12 04:42 PM
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gfretwell Offline
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How accurate do you need it? What voltages and current?

I have a 450w PC power supply on my bench for doing some of these things.
You get +12, +3.3 and +5 VDC at pretty good amps. the -12 and -5 don't have much oomph.


I wouldn't trust it to calibrate a meter tho. If you really want a meter to be right, you need to send it to a lab.


Greg Fretwell
Re: Looking for a good portable power supply [Re: sparkyinak] #207495 10/31/12 10:31 PM
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NJwirenut Offline
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If you are calibrating meters, what you want is a "voltage standard", not a power supply. I use one of these on my test bench at work:

http://www.ebay.com/itm/EDC-Model-M..._DefaultDomain_0&hash=item3f1e20bfd8

Re: Looking for a good portable power supply [Re: NJwirenut] #207498 11/01/12 07:09 PM
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sparkyinak Offline OP
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Unfortunetly my employer don't buy used equipment


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Re: Looking for a good portable power supply [Re: gfretwell] #207499 11/01/12 07:11 PM
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sparkyinak Offline OP
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Since i'll be calibrating meters, it has to be accurate


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Re: Looking for a good portable power supply [Re: sparkyinak] #207500 11/01/12 09:23 PM
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gfretwell Offline
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If you are buying a brand new voltage standard, you may be spending enough money to make that lab I was talking about look attractive. How many meters are you going to be maintaining?
IBM did in house calibration but they had about 10,000 pieces of equipment to keep ISO 9000 compliant.

You also need to calibrate the standard every so often too (I am not really sure what that I9k criteria is these days)


Greg Fretwell

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