I am just posting this in case anyone was curious what the inside of their Chargemaster 1500 Scale looks like.
I opened mine up last night. I could adjust the load cell to a point where the scale was stable and did not automatically climb in value, but it would not calibrate nor respond to the test weight.
I looked up the manufacturer of the load cell. I contacted them in China last night and they responded over night. They do not have a distributor in the states, but I asked if I could purchase one from them and have it shipped to the US. They list the cost as $25, which would be worth it if it could fix my scale. Having just watched jmorris's youtube video on Chargemaster 1500 scale drift, I now understand why it was so difficult to get the scale to stabilize..
If I had a good RCBS balance scale, I would build a version of jmorris's trickler. No computer, no pc boards - just a push button switch, a relay and a photoelectric switch. The KISS approach is usually superior and more reliable in the long run.
And here is the RCBS troubleshooting guide they sent me. Maybe it will be useful for someone having issues with their scale/dispenser.
Scales_ChargeMaster Troubleshooting Guide.pdf