Review on TRUE METRIX® Solution Solutions TRUEplus® by Greg Sullivan

I would expect a calibration pattern to have a much narrower range when something is calibrated. If my readings are off by 30mg and can be considered correct, that appears large and there may be a difference between high and within range. To be fair, it has to be said that the measured values of the three solutions are actually in the advertised range. I'll have to take a look, maybe with a more accurate gauge.