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  1. B

    Anyone familiar with a Mastercool scale ad-err?

    Bought a Mastercool Mastercool 98210-A Electronic Refrigerant Scale. Out of the box, I get an ad-err right out of the box. Calibration procedure does nothing. Mastercool is closer. Google reveals little. Anyone seen this before, and does it mean no-go?
  2. B

    What kind of pliers do I have here?

    These were given to me. I believe these are snap ring pliers: But what are these for? I'm thinking some kind of tubing, or maybe grease fittings?
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