On 16/05/16 16:36, DaveC wrote:
This is a beeper piezo in a Fluke 117 DMM which quite beeping. Scoped the
piezos pads and... nothing.

Did you mean that "it quit beeping"? If so, you aren't going to hear
anything.

An inverter (from the CD4069) is connected across the piezo. Guess I dont
understand anything about driving piezos.

The Fluke should be producing a square wave, say 1KHz,
across the piezo. The piezo itself looks like a mid-sized
capacitor; you won't get any DC resistance reading through
it. They are extremely high resistance devices.

If you touch 9v to either side of the piezo, you should
hear it click, and click again when you disconnect.
The Fluke does that too, but fast.