| Products > Test Equipment |
| Cheap, not Chinese, Voltage reference for DIY meter calibration |
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| BennoG:
--- Quote from: KungFuJosh on September 07, 2024, 08:14:05 pm ---I recently got Doug's VREF10-001 r9 and it's 10V which is more standard for a voltage ref. --- End quote --- Yes I am looking at this for a while now planning on buying one sometime (to add to my addiction collection) I have a 7 1/2 dmm and a couple of 6 1/2 dmm. I would like to use it as some transfer calibration tool, an calibration check tool. Benno |
| skander36:
--- Quote from: BennoG on September 08, 2024, 06:53:10 am --- --- Quote from: KungFuJosh on September 07, 2024, 08:14:05 pm ---I recently got Doug's VREF10-001 r9 and it's 10V which is more standard for a voltage ref. --- End quote --- Yes I am looking at this for a while now planning on buying one sometime (to add to my addiction collection) I have a 7 1/2 dmm and a couple of 6 1/2 dmm. I would like to use it as some transfer calibration tool, an calibration check tool. Benno --- End quote --- A reference with LT1021 with 5 ppm drift should never be used in calibration process of a 7,5 digit DMM or even in 6,5 digit. Their internal references are at least ten times stable that LT 1021 so you may alter calibration process. Use at least LM 399, or LTZ1000 or newer references. |
| J-R:
Doug's VREF10-001 r9 has a few changes to make it better. The price also includes 2 years of free calibrations. However, if you have the money, there is the PDVS2mini: https://www.wrytech.eu/products/pdvs2 |
| KungFuJosh:
I agree it probably shouldn't be used to calibrate those meters, but it's still a great reference for them. The stability I found with my 6.5 digit meter was excellent. I wanted the PDVS2mini for a while, but spending more than double the cost of the VREF10-001 r9 wasn't cool with my wallet. If I'm going to invest that much for a ref, I'd rather build the Elektor project Martin72 was doing. I'm still tempted, maybe someday. |
| dazz1:
--- Quote from: KungFuJosh on September 08, 2024, 10:06:38 pm ---I agree it probably shouldn't be used to calibrate those meters, but it's still a great reference for them. The stability I found with my 6.5 digit meter was excellent. I wanted the PDVS2mini for a while, but spending more than double the cost of the VREF10-001 r9 wasn't cool with my wallet. If I'm going to invest that much for a ref, I'd rather build the Elektor project Martin72 was doing. I'm still tempted, maybe someday. --- End quote --- I have a fond spot for Elektor because back in the day, I considered them to be a source of advanced or professional quality circuits. Although this Elektor Voltage Reference project https://www.elektormagazine.fr/labs/voltage-current-calibrator-0-to-10v-and-0-to-40ma-0001 appears to be community contributed, it looks like an Elektor project. I haven't priced the BOM (Elektor projects were never cheap) I suspect it would be good value for the money. It looks fairly straight forward to build. Has anyone built one of these? |
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