Instruction manual

4 Measurement
48
4.5 Security menu
This menu allows you two functions:
Key lock, to prevent accidental operation; and password lock, to prevent illegal operation.
4.5.1 Key lock
This function prevents accidental key operation, which may cause unintended setting change
or hold output.
Set up
1.
Hold down the MEAS key in the measurement mode displayed until “Lock” on the
measurement display and “on” on the sub-display respectively.
The key lock displayed function starts working. Releasing the key lets the instrument
return to the measurement mode, and the setup for the key locking is completed.
No key operation is accepted hereafter and when any key is pressed, “Lock” is displayed
on the measurement display and “on” on the sub-display respectively.
Release
1.
Press the MEAS key when a measured value is displayed.
The instrument will display “Lock” on the measurement display and “on” on the sub-
display.
Note
You cannot release the key lock immediately after key lock setup, with the displays showing “Lock”
and “on”. Make sure to start the release operation with a measured value displayed.
2. Hold down the MEAS key in the measurement mode continuously until the display
of the sub-display turns into “oFF” from “on”.
When you release the MEAS key with “oFF” displayed on the sub-display, key lock
release is completed.
The instrument returns to the measurement mode, and now all keys are enabled.