Lewm,
I knew you were too smart to be just a medical mechanic! ;-)
One could tape a paper clip down next to the LP when using the device, then test it afterwards to ensure it's de-magnetized. I haven't bothered, but that would be a reasonable procedural control.
I knew you were too smart to be just a medical mechanic! ;-)
Do you have something you use as a "control", so you know for sure that DE-magnetization has occurred?I've used the device to intentionally magnetize, de-magnetize and re-magnetize needles and paper clips. This is easy and repeatable.
One could tape a paper clip down next to the LP when using the device, then test it afterwards to ensure it's de-magnetized. I haven't bothered, but that would be a reasonable procedural control.