Back in the 1990’s we calibrated power sensors, all of them but the 50GHz ones,
we used metal foil HP labels (2 types - long and short) using an other brand printer (about 4”w x 6”h x 8”d) the serial no., and the values would be printed on the label and the charted points. Then we put a clear laminate on top of the label, then installed the new label on the power sensor. I haven’t checked but suspect the blank labels may still be available from Keysight, since they are still calibrating the older sensors.
Don Bitters
