baking level of an anode or cathode measured by the heat treatment of a reference coke attached to the anode or cathode, and quantified in equivalent degrees, °E, determined from the mean crystallite height, Lc, of the reference coke using a calibration curve
Note 1 to entry: The calibration curve is derived by subjecting a series of separate samples of the reference coke to a 2 h heat treatment at different hold temperatures, in degrees Celsius, and measuring the mean crystallite height, Lc The equivalent temperature, Teq, is numerically equal to the temperatures, in degrees Celsius, plotted on the calibration curve.