Calibration time

If your in the right place at the right time a useful bargain can be found..

I had been looking at a way of checking calibration of my DMMs on DC, and this useful board will do that for £4. Using an AD584K Precision reference chip, that will output 4 high stab Volts by the flick of a switch:

                                  10.0 V  +/- 10   mV
                                    7.5V   +/-   8   mV
                                    5.0V   +/-   6   mV
                                    2.5V  +/-    3.5mV

Figures quoted are for 15V feeding the input of the board



I have seen these on the Internet at various sources, but my link proved to be the cheapest I could find: http://www.banggood.com/AD548-High-Precision-Voltage-Reference-Module-4-Channel-Calibration-p-932160.html

There is also a full spec sheet on the device at the above link.

I will come back to this when I have boxed it up and terminated it for better protection.. 
Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

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