Voltage Standard Ref Tests - Digital Multimeter reference / accuracy check

I demonstrate the DMMCheck and PentaRef from VoltageStandard (www.voltagestandard.com). These are Low cost Voltage References and multimeter checks for voltage, current and resistance. I then run through some tests to compare the accuracy of the following multimeters: Fluke 287 Brymen TBM867 / BM867 Major Tech MT1887 / Extech EX530 Major Tech MT22 ISO-Tech IDM207 I also introduce the Fluke 87 V which I will review soon. A list of my multimeters can be purchased here: http://astore.amazon.com/m0711-20?_encoding=UTF8&node=5