Q: Is there anyone out there that can help me make sense of what I'm seeing on the the Cap Leakage function on 1.52m?
1. First there's the setup screen, I insert the properly oriented capacitor (e.g. with a 470uF 16V, but same with 100uF 35V, 100uF 16V etc) and trigger it.
2. Then I see "Charging Rl" with a progressively increasing current and voltage displayed until it hits about 5V (as measured with a DMM across the capacitor.)
3. Then it changes to "Charging Rh", displaying another progressively increasing current and voltage (which appears to a negative offset from 5V DC as the voltage across the capacitor goes down) but if it's "Charging Rh" then why is the capacitor discharging in this state? Sometimes the displayed values go down on a different run with the same capacitor though.
I feel embarrassed as I'm so confused.
(AY-AT/m328 color kit board that was pre-built but has high precision Rl Rh resistors, good 2.5V ref, I've put a 328 in from Farnell.)
EDIT: Is it... 5V is applied via Rl, then when the current drop below a trigger point, 5V is then applied via Rh instead? But then, why would the figures be displayed current capacitance voltage with refeference to GND as measured from Rl, but then during the Rh phase the figures are being show with reference to 5V instead. So I'm still confused?