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Blog Precision resistance Standard -  Bulk Metal Foil Technology from Vishay Precision Group (VPG)
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  • Author Author: Robert Peter Oakes
  • Date Created: 17 Dec 2014 6:51 AM Date Created
  • Views 827 views
  • Likes 3 likes
  • Comments 4 comments
  • resistance
  • vishay
  • kelvin
  • vpg
  • connections
  • standard
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Precision resistance Standard -  Bulk Metal Foil Technology from Vishay Precision Group (VPG)

Robert Peter Oakes
Robert Peter Oakes
17 Dec 2014

Hi Everyone, The holiday season just gets better and better...

 

I would like to take this opportunity to make a shout-out to Vishay Precision group and in particular Richard who has personally created an excellent Christmas gift for me

 

I have been working with Vishay or more precisely they have been helping me with my Power Supply Project by sponsoring me through providing various types of resistors needed to make the project a success

 

Namely the following

Numerous Powertron Current Sense power resistors of sub ohm value perfect for the measurement of a power supply current load, a Power Meter Sensing or a DC Load feedback, see VPG - Powertron

 

imageimageimageimage

 

A wide selection of Precision divider Resistors

Waiting for them to arrive image

 

And finally to top it all, a Beautiful Resistance Standard, custom made for me by Richard at Vishay Precision Group and arrived just in time for Christmas, what a wonderful gift, my original ask was simply to be provided with a selection of quality precision resistors so that I could make a standard of my own to use in my lab, and use it in my tutorial videos to show how armed with great products you can maintain and spot check your instruments without having to invest in expensive lab equipment or have to use precision temperature controlled environments. Once I explained to Richard what I was about and my plans, Richard and Vishay offered to create the box for me, WOW, how could I refuse.

The resistors in this standard are ultra high precision,  hermetically sealed, and almost zero temperature co-efficient at 0.005% standard accuracy and if that in itself is not enough, the standard has been precision measured to 7 digits of accuracy, all the included resistors are 4 terminal Kelvin connected, ranging from 1ohm to 1Mohm, see more here  http://www.vishaypg.com/docs/63003/vhp100.pdf

 

This is what I was presented with (Not the Pen image ) and it was delivered in a  fully padded instrumentation carry case.

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Now I feel really special and am armed with more precision than I can currently measure, here is the cal readings of the unit

image

And the best thing is, this wont drift, is virtually immune to temperature variations and will last a life time as long as I dont abuse it

 

So I will be including this resistance Standard in a future video on precision measurements (We will have a look inside too ) , current sensing using kelvin Connections and to cap it off precision op amp circuits using precision divider networks, all using the resistors from Vishay and available through E14, Farnel or Newark


Richard, If you see this, Thank you so much, I hope you have a great holiday, I know I am already. image



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  • Robert Peter Oakes
    Robert Peter Oakes over 10 years ago in reply to jw0752

    They wont be essential, you can get away with regular power shunt resistors, you just need to wire them correctly, I will cover all of this in the Xmas videos coming soon

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  • Robert Peter Oakes
    Robert Peter Oakes over 10 years ago in reply to DAB

    I know right, I was surprised when I found out too, even the ones that are a few % tolerance are still very stable so all you need to do is measure them for the right value and compensate in software if your using a micro based system

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  • jw0752
    jw0752 over 10 years ago

    Hi Peter, Nice presentation on the precision resistors. If you can let us know in advance if we need to get any of them for the power supply project.

    John

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  • DAB
    DAB over 10 years ago

    Great post Peter,

     

    I did not know that these precision resisters were available at these wattage options.

     

    Thank you and Vishay for bringing this new capability to my attention.

     

    DAB

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