Site Master™ MS2085A/MS2089A User Guide : Secure Data (Option 7)
 
Secure Data (Option 7)
Introduction
When equipped with Option 7, the MS20x0A Field Master provides for careful management of confidential data for both the setup parameters and the resulting measured data. Highly sophisticated systems and equipment have technical applications that must remain secure in their operations. The particular parameters that must remain secure usually involve operating frequencies and a variety of other setup configurations. To accommodate the measurements and yet preserve the data as confidential, Option 7 can be used to prevent any setup data or measured data from being stored on internal memory of the instrument.
Refer to ADVANCED on how to turn on SECURE DISPLAY toggle. When the Secure Display toggle is turned on the data (setups, measurements, screenshots, etc.) cannot be stored in the internal memory of Field Master Pro, instead have to be stored using an external USB memory device. Note that both FILE menu (main menu) and FILES menu (System menu > FILES) will be disabled on the instruments installed with Option 7 unless a USB memory device is connected. The instrument is preset immediately when the SECURE DISPLAY toggle is turned off.
 
Caution 
Note that even with Option 7 enabled, operating parameters (such as frequency range and power level that are set by the user) remain stored in the Site Master EEPROM when the instrument is turned off. These parameters can be erased, however, via a Master Reset operation, as described in Erase All User Files in Internal Memory.