FAQ: “We recently had our ColorFlex Tomato instrument serviced and calibrated. Our Tomato Tile has a TPS value of 48.39, and we aren't sure of what sort of reported range we should consider acceptable when we read that plate after standardization. Do you have a recommendation?”
Typically, after you standardize your LabScan XE or ColorFlex Tomato Meter, you would read your Tomato Tile as a PQ Performance Qualification step. You should read back TPS within tenths of a unit, and certainly under a half unit.
If your reading of the Tomato Tile is further out than this, re-hitch your instrument to the Tomato Tile using the Hunter L, a, b C/2 values on the back of the tile.
Then re-check the PQ read of the Tomato Tile.