Help with PACT power dispenser, electrical power filter

[kdiver58]

I have a PACT powder dispenser that is getting interference from my whole home A/C.

I contacted PACT and they said that if the scale does not see 2 matching numbers
it will not proceed. A line conditioner is $75 to 125. If I can just filter the output to
try and get a a cleaner 12 volts I rather do that .

Could someone tell me what capacitors I can place between the 12 volt power supply
output to filter out the noise that is keeping the scale from calibrating or dumping
powder? During the winter I had no problem at all. the fan is not the problem it's the
A/C compressor .

Thanks .. K

[Mike W1]

I've no idea if this will help or not but it's from an old posting a number of years back on drifting of electronic scales.

The drifts were readily recognizable, but annoying. An instrument man
where I work told me the cheapest and easiest thing to try was to
install a 1000 MFD / 16V capacitor by bridging it across the positive
and negative terminal connectors between the transformers `battery
simulating' terminals and the Pact BBK's battery connecting terminals.

I picked one up at Radio Shack for 99 cents (probably a rip-off?). I
snapped the transformer, and BBK terminal connectors right over the
wires of the capacitor (one on each terminal connector). No soldering,
etc. required. Just make sure to get the negative side of the
capacitor on the negative, and positive on the positive. There is a
band of dashes (negative signs) running down the negative wire side of
the capacitor that I purchased. The capacitor sits comfortably hidden
away in the battery space left behind by the now forever missing
battery, along with the terminal connectors for the scale and the
transformer. When warmed up properly (20 minutes to 30 minutes) it
appears to be as stable now as with the battery, although I havn't had
much time to test it fully. When the scale scans it occasionally
drifts 0.1 grain plus or minus (or 0.01 gram in the case of the test
weights), but it did this with a battery as well. No more swings wider
than this so far at least, without movement or wind contributing.

[kdiver58]

well it turns out that the output on the PACT is 12 volts AC. I ended up going to Fry's and getting a small line conditioner for $60. That solved my problem.