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Skywave · 31st Jan 2016, 5:42 pm

The initial part of this attached article is something that many of us have probably experienced: which voltage reading do I believe?

http://www.frankshospitalworkshop.co...reference.html

The chip as featured in that design is described here:
http://cds.linear.com/docs/en/datasheet/1021fc.pdf

Now before I take this any further, let me explain first that I am thinking in terms of what would be a useful voltage calibration reference for those uses in a typical workshop that many of us use, not something that is to NPL standards.

For the purposes of this thread, the attached article is separable into two parts: (1) the design of a calibrator; (2) actually using it. To avoid this thread drifting off-topic, it would be appreciated if we limit this thread to the design part only. (Usage of this calibrator - or any other one - can be dealt with in a separate thread).

Basically, the question I am asking is this: is this design for a voltage calibrator worthy of building for the purposes as described: to check the calibration of d.c. voltmeters, analogue and digital, that we typically use in our workshops? I'm inclined to say "yes", but a range of opinions is always worthwhile soliciting for with something like this.

As always, all responses will be appreciated.

Al.

31st Jan 2016, 5:42 pm	#1
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	A precision voltage calibrator The initial part of this attached article is something that many of us have probably experienced: which voltage reading do I believe? http://www.frankshospitalworkshop.co...reference.html The chip as featured in that design is described here: http://cds.linear.com/docs/en/datasheet/1021fc.pdf Now before I take this any further, let me explain first that I am thinking in terms of what would be a useful voltage calibration reference for those uses in a typical workshop that many of us use, not something that is to NPL standards. For the purposes of this thread, the attached article is separable into two parts: (1) the design of a calibrator; (2) actually using it. To avoid this thread drifting off-topic, it would be appreciated if we limit this thread to the design part only. (Usage of this calibrator - or any other one - can be dealt with in a separate thread). Basically, the question I am asking is this: is this design for a voltage calibrator worthy of building for the purposes as described: to check the calibration of d.c. voltmeters, analogue and digital, that we typically use in our workshops? I'm inclined to say "yes", but a range of opinions is always worthwhile soliciting for with something like this. As always, all responses will be appreciated. Al.