Chapter 10 SECURITY SETUP9.3 Calling up Memory DataF-52, 53, 54, 55 119Chapter 10 SECURITY SETUPThe security features of the pH meter series F aim to prevent irresponsible revision or deletionof set or measured data stored in the meter by a third person. Therefore, changes by a thirdperson without authority are not available for date change, data memory deletion, or securityrelated setting change.The meter can be used without operator registration. In that case, this section can be skipped.When the operator is not selected by selecting OFF in SELECT OPERATOR, the operatorname “*GUEST*” is automatically selected.There are two levels of operator: Administrator and Operator.In user control functions, the configuration of each setting item is as follows:Item Administrator OperatorMeter settingDate/Time setting -Maintenance -Compact flash settingApplicable only for F-53, 54, 55Network settingApplicable only for F-55Security setting -