Oki ES3640MFP Service & Troubleshooting Manual page 31

Diagram: Standard Calibrator Utility
The Scanner unit can be calibrated via both the Standard and Expert Calibrator processes (shown above).
This article will use the Standard Calibrator to demonstrate the process for the remainder of the
document. The instructions are the same for calibrating the scanner via Standard and Expert Calibrator
modes.
In Select Measurement Method (item 1 of the above window), select ColorCal as shown below.
Diagram: Expert Calibrator Utility