GQ Electronics GMC-800 - Advanced Settings: Calibration and Tube Voltage

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Calibration
Press Key 4 to select
This menu mainly for qualified calibration facility. User may change the value when needed. Press Key4 to
enter each calibration item.
Navigation keys:
Key1: Back
Key2: Change the digit value in highlighted position.
Key3: Change the digit value in highlighted position.
Key4: Confirm and move to next digit.