Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 153)

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M-4659
Key Lock
Enabled when [Key Security] is set to [Keylock] under [Environment] - [Detail Setting] in
the [Basic Setting] tab.
Password
The password used to release the key lock. (Up to 8 characters)
Key, Function, Media
Select whether to lock each item.
Settings Description
Free Key lock not applied.
Lock Disables the operation.
6.6 Entering Basic Settings