ENCalibrating the DeviceBefore you start measuring, please calibrate the device. If you own multiple devicesmake sure that the serial number on the back of the calibration plate matches the serialnumber of your i1Pro device. Refer to the user guide of your measurement software foradditional information on the calibration process.1. In the center of the calibration plate is a slider to protect the white calibration tile.Open this protective slider until it clicks into place to access the white referenceceramic tile on this calibration plate.2. Place the i1Pro measurement device on the calibration plate. The device must seatfirmly on the calibration plate.3. Set the software for calibration of the device and press the measurement button.Status indicator lights switch off during calibration. Once the device is successfullycalibrated the status indicator lights pulsate white. If the calibration fails thestatus indicator lights will pulsate red and then return to solid white.4. When the calibration is finished you should close the protective slider for the whitereference ceramic tile.A clean white reference ceramic tile is essential for providing accuracy ofyour measurements. The protection cover should always be closed when thewhite reference ceramic tile is not in use. If necessary you can clean the whitereference ceramic tile with isopropyl alcohol and a soft clean cloth.