ESR meter construction question

I finally built my ESR meter kit from John and it "works" (it powers up,
displays "EA" and then "- ") but when the measurement leads are tied
together in order to zero them out the value just keeps fluctuating wildly.
The fluctuation is large and happens a few times a second. If I press the
button to zero them out it turns the meter off. I'm doing this with the
ends of the wires off the PCB (the PCB has not been installed in the case
yet) clamped together. Any ideas?
Received on Fri Jan 21 07:41:15 2000