Endress+Hauser Levelflex FMP53 Operating Instructions Manual page 47

Levelflex FMP53 PROFIBUS PA
Endress+Hauser
Enabling and disabling the keypad lock
Access to the entire operating menu via local operation can be locked via the keypad lock.
When access is locked, it is no longer possible to navigate through the operating menu or
change the values of individual parameters. Users can only read the measured values on
the operational display.
The keypad lock is switched on and off via a context menu.
Switching on the keypad lock
SD03 display module only
The keypad lock is switched on automatically:
• If the device has not been operated via the display for > 1 minute.
• Each time the device is restarted.
To activate the keylock manually:
1. The device is in the measured value display.
Press  for at least 2 seconds.
 A context menu appears.
2. In the context menu select the Keylock on option.
 The keypad lock is switched on.
If the user attempts to access the operating menu while the keypad lock is active, the
message Keylock on appears.
Switching off the keypad lock
1. The keypad lock is switched on.
Press  for at least 2 seconds.
 A context menu appears.
2. In the context menu select the Keylock off option.
 The keypad lock is switched off.
Bluetooth® wireless technology
Signal transmission via Bluetooth® wireless technology uses a cryptographic
technique tested by the Fraunhofer Institute
• The device is not visible via Bluetooth® wireless technology without the SmartBlue app
• Only one point-to-point connection between one sensor and one smartphone or tablet is
established
Operation methods
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