Hioki RM3545, Instruction Manual, Page: 135 / 364

7.1 Disabling and Enabling Key Operations
127
7
Key-lock can be canceled only when
[UNLOCK]
is displayed.
If key operations are disabled by the KEY_LOCK signal, de-assert (OFF) the signal to
unlock the keys.
2
Enable or disable key operations.
[UNLOCK] is displayed.
(Key-lock operation triggered by the EXT I/O KEY_LOCK signal is not displayed.)
Re-Enabling Key Operations (Key-Lock Cancel)
Disable all except key-lock
cancel and return to the
Measurement screen.
Disable all except key-lock
cancel and basic settings
change and return to the
Measurement screen.
Return to the
Measurement screen.
Press and hold [UNLOCK] for one second.