Products > Test Equipment
Reference PCB for Calibrating DMM's
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artag:

--- Quote from: JenniferG on November 24, 2022, 05:45:26 pm --- I need some local electronics buddies -- I'll have to look into that.. can share resources and ideas to save money, etc. :)_ 

--- End quote ---

Do you have a hackspace near you ? A good place to find electronics buddies, and maybe even a high quality DMM.
J-R:
As mentioned, those are some decent references for the hobbyist, but stock has been a major issue this year.  All of these are out of stock currently:

https://voltagestandard.com/pentaref
https://dmmcheckplus.com/technical-information
https://www.ianjohnston.com/index.php/onlineshop/handheld-precision-digital-voltage-source-2-mini-detail

The DMMCheck Plus is easily the best bang for the buck because of the sheer number of references it provides, and you just mail it back for yearly calibrations. Use it to calculate other values that may be necessary to check other ranges of your equipment.

I'd really push for only using references that can be traced to calibrated equipment.  Otherwise you're punching fog...
JenniferG:

--- Quote from: wasedadoc on November 24, 2022, 06:26:51 pm ---
--- Quote from: JenniferG on November 24, 2022, 05:45:26 pm ---.... take some Royal Ohm 1 cent metal film resistors (1%) , say like 3 of them, to my local electronics store and see if they'd kindly measure them for me on a calibrated scope.

--- End quote ---
Think again.  Scopes are rarely if ever calibrated to anywhere near the accuracy of a decent meter.  And as for a local electronics store having one calibrated and maintaining its calibration - more chance of seeing pigs fly overhead.

--- End quote ---

Sorry I meant calibrated meter.
JenniferG:

--- Quote from: J-R on November 24, 2022, 11:13:56 pm ---As mentioned, those are some decent references for the hobbyist, but stock has been a major issue this year.  All of these are out of stock currently:

https://voltagestandard.com/pentaref
https://dmmcheckplus.com/technical-information
https://www.ianjohnston.com/index.php/onlineshop/handheld-precision-digital-voltage-source-2-mini-detail

The DMMCheck Plus is easily the best bang for the buck because of the sheer number of references it provides, and you just mail it back for yearly calibrations. Use it to calculate other values that may be necessary to check other ranges of your equipment.

I'd really push for only using references that can be traced to calibrated equipment.  Otherwise you're punching fog...

--- End quote ---

I'll grab a DMMCheck Plus whenever it becomes available. Thanks everyone!  This chip shortage sucks and I wonder when things are going to get back to normal?
coromonadalix:
not sure if it will return to a "normal"   some are making tons of money selling overpriced stuff,  and the fake market has gone up

It is said   maybe around 40%  of the  china electronics may or have counterfeit parts being sold

Here at my job   we lost tons of $$$ because of this,  lots and lots of problems with chip shortages and fakes, some Xilinx 40$  fpga are sold to us 380$  ....  huge costs adjustments / redesign / substitutions  ...   we sell  very specialized equipment and had to rise the pricing
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