Hioki 3511-50, Instruction Manual, Page: 45 / 140

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4.4 Key Lock Function
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4.4.1 Executing the Key Lock Function
NOTE
4.4.2 Cancelling the Key Lock Function
NOTE
4.4 Key Lock Function
When the key lock is turned on, all key switches on the front panel are
disabled to protect settings.
Press for 2 s or longer. Use the LED lamp to the right of the second
parameter measurement display (SUB PARAMETER) to check on the key
lock condition.
In the external trigger mode, the key lock does not apply to . The
external trigger can be activated manually.
The key lock function can be set only in normal or comparator test mode.
Note that, as long as is kept pressed, the key lock function is
activated and inactivated alternately.
Press for 2 s or longer. The LED lamp goes out to indicate that key
lock is canceled.
Even if the power supply is interrupted, the key lock function is not
canceled.