Unusual AVO meter

[ppppenguin]

There can't be too many people who need to test zeners on a regular basis to the point where they need a dedicated meter. Presumably enough for AVO to make them as a product. ISTR there was a recent thread in which somebody was going to build a zener diode tester.

If I need to test zeners it's a bench PSU, resistor (effectively a low grade current source) and DVM.