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8.2.3
Button lock
To prevent unintentional operation, a button lock can be set up.
The activated button lock is not shown on the display.
■
The display illumination is independent of the button lock.
■
The button lock is switched on and off in the same manner.
To prevent the button lock from being triggered unintentionally, the cover plate (operating plate)
of the control element must be removed for the setup.
Use the following steps to switch the button lock on or off:
Fig. 22:
Pulling the control element off
Fig. 23:
Removing the cover plate (operating plate)
Fig. 24: Plugging the control element on
Operating Instructions 2CKA001473B8822
1. Pull the control element of the device
from the flush-mounted insert with
the aid of the cover frame.
2. Pull the cover plate from the control
element.
3. Plug the control element back on.
–
Ensure that the control element is
plugged on the right way around.
Otherwise the plug contacts
could sustain damage.
–
The interruption of power causes
the device to carry out a
calibration after the plug-on.
Operation
│24
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