Endress+Hauser Levelflex M FMP40 Operating Instructions Manual page 39

Levelflex M FMP40 with HART/4...20 mA
⇒
ENDRESS + HAUSER
–
+ E
"
Endress+Hauser
5.3.2 Unlocking the configuration mode
If an attempt is made to change parameters when the device is locked, the user is automatically
requested to unlock the device:
"Unlock Parameter" (0A4):
The Levelflex is released for operation by entering the release code (on the display or via
communication)
100 = for HART devices
Hardware unlocking:
O S
After pressing the and
100 = for HART devices
⇓
⇓
Caution!
Changing certain parameters such as all sensor characteristics, for example, influences numerous
functions of the entire measuring system, particularly measuring accuracy. There is no need to
change these parameters under normal circumstances and, consequently, they are protected by a
special code known only to the Endress+Hauser service organization. Please contact
Endress+Hauser if you have any questions.
F
and keys at the same time, the user is asked to enter the release code
Press
Please enter release code and confirm with
O S F
and and simultaneously
Operation
F
.
39