Resetting a 918 colorimeter

On occasion a 918 colorimeter will act strangely. It is possible to reset the unit's microprocessor. Often this will eliminate the problem and it will not be necessary to have the unit repaired. Note that an instrument reset will store factory default values in the calibration memory. It will be necessary to perform a full calibration after the unit is restored to operation. To do a factory reset proceed as follows:
  1. Unlock the shoe and remove the AC adapter (if attached).
     
  2. Press and hold the left and right key.
     
  3. Simultaneously bring the shoe closed against the bottom of the unit.
     
  4. Gently slide the battery door partially open. Lower the door just enough to remove power from the unit. Too far and you will shoot six ni-cad batteries across the room!
     
  5. Leave the door open for about ten (10) seconds.
     
  6. While continuing to hold both keys and the shoe closed, bring the battery door back up into the closed position.
     
  7. In approximately five (5) seconds the unit will reset. It will prompt "MEMORY LOST", and then "NEED CAL". Continue by performing a full calibration (see Related Support). It will be necessary to re-enter the calibration values from the calibration velope.

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