Regulated DC Power Supply (w/ calibration)

Thread Starter

maitrey

Joined Sep 4, 2014
78
Hello,

I'm looking for a regulated DC power supply (110 VAC to 24-30V DC) to calibrate another piece of machine. This machine will be sourced variable DC voltage and it will then give desired output which will be recorded to measure machine's overall.

Ideally looking for something which can be calibrated from OEM or third party periodically.

I did a quick search and came across this device on Amazon but not sure if it can be calibrated! Any suggestions?
Amazon.com: DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Power Supply with High Precision 4-Digits LED Display, 5V/2A USB Port, Coarse and Fine Adjustments Jesverty SPS-3010 : Industrial & Scientific

TIA
 

nsaspook

Joined Aug 27, 2009
12,778
Hello,

I'm looking for a regulated DC power supply (110 VAC to 24-30V DC) to calibrate another piece of machine. This machine will be sourced variable DC voltage and it will then give desired output which will be recorded to measure machine's overall.

Ideally looking for something which can be calibrated from OEM or third party periodically.

I did a quick search and came across this device on Amazon but not sure if it can be calibrated! Any suggestions?
Amazon.com: DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Power Supply with High Precision 4-Digits LED Display, 5V/2A USB Port, Coarse and Fine Adjustments Jesverty SPS-3010 : Industrial & Scientific

TIA
Anything can be calibrated (even a bulb thermometer), you just need a standard to create a calibration table for the range desired for any deviations from the standard. The real question is stability and repeatability.

 

Thread Starter

maitrey

Joined Sep 4, 2014
78
Will You always be using this Supply in a "Climate-Controlled-Environment" ?

How many zeros do You think You need ?
.
.
.
Yes, this will always be used in climate controlled environment. Looking for something that can source in the increment of 1mV
 

nsaspook

Joined Aug 27, 2009
12,778
...
Yes, this will always be used in climate controlled environment. Looking for something that can source in the increment of 1mV
...
Something like this but may be little cheaper?
https://www.fluke.com/en-us/product/precision-measurement/bench-instruments/fluke-8808a
You will need something like that (calibrated as an in-house standard) to precisely measure the voltage change steps of at least 100uv and a power supply with the same capability of at least 100uv steps in the voltage range you want for actual voltage source 1mv repeatability with the required stability for your target equipment calibration procedure.

Metrology is not cheap.
 

MisterBill2

Joined Jan 23, 2018
17,794
If you have an accurate and stable volt meter, then the other required tool for calibration is a fairly stable voltage source. At one place I worked we would send out the 4 1/2 digit Beckman multimeter for calibration and then when it was returned we would use it to monitor a DC supply while we checked the other meters to see how close they were. Most were quite close. Close is good enough for service diagnostics but not for calibration.
 

nsaspook

Joined Aug 27, 2009
12,778
Maybe something like this for the meter: https://siglentna.com/digital-multimeters/sdm3055-5-½-digits-dual-display-digital-multimeters/
A calibration quality power supply with the needed precision, resolution and stability will not be cheap but it will eliminate the need for a high-spec calibrated DMM to set it.
https://www.tek.com/en/documents/technical-brief/dc-power-supply-technical-information
 

AnalogKid

Joined Aug 1, 2013
10,944
You are asking us about for recommendations and evaluation of a power supply, but you forgot a critical piece of information about *your requirements* for the supply.

Maximum current?

ak
 

MisterBill2

Joined Jan 23, 2018
17,794
Certainly the current rating is needed if the supply will be delivering any current when the calibration is being done. Also, because there will be other uses for a good power supply, it will be handy to have it able to support the requirements of other applications. There are also calibration-standard supplies that are made exclusively for calibration use. They are not at all cheap.
 
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