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Looking for a good portable power supply #207456
10/30/12 03:00 PM
10/30/12 03:00 PM
S
sparkyinak  Offline OP
Member
Joined: Jul 2007
Posts: 1,328
Alaska
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?


"Live Awesome!" - Kevin Carosa
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Re: Looking for a good portable power supply [Re: sparkyinak] #207461
10/30/12 04:42 PM
10/30/12 04:42 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,166
Estero,Fl,usa
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
10/31/12 10:31 PM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
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
11/01/12 07:09 PM
S
sparkyinak  Offline OP
Member
Joined: Jul 2007
Posts: 1,328
Alaska
Unfortunetly my employer don't buy used equipment


"Live Awesome!" - Kevin Carosa
Re: Looking for a good portable power supply [Re: gfretwell] #207499
11/01/12 07:11 PM
11/01/12 07:11 PM
S
sparkyinak  Offline OP
Member
Joined: Jul 2007
Posts: 1,328
Alaska
Since i'll be calibrating meters, it has to be accurate


"Live Awesome!" - Kevin Carosa
Re: Looking for a good portable power supply [Re: sparkyinak] #207500
11/01/12 09:23 PM
11/01/12 09:23 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,166
Estero,Fl,usa
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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