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Password Protecting the ThermaViewer® Temperature Data.
The ThermaViewer normally sits out where everyone can see it and examine the data. This allows anyone with interest in the data to zoom in/out of the data, enter a trace mode, or scroll back to data collected at some previous time. This is desirable, since it makes each person a part of the effort to monitor and control temperature.
The ThermaViewer has a password system which prevents any unauthorized personnel from entering the menu system and changing the operational parameters. As long as the password system is active, anyone can push any button or look at any data value, but only those with the correct password can change parameters or settings.
Even with access to the menu system, the data itself is secure because it can't be changed, deleted or added to (although it can be erased). The temperature history is completely protected and unchangeable.