Lock/Unlock Configuration; Resetting The Customer Parameters - Pepperl+Fuchs HART LUC-M Series Operating Instructions Manual

LUC-M** with HART/4 mA ... 20 mA
Operation
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5.7

Lock/unlock configuration

5.7.1 Software security locking
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Enter a number 100 in the "unlock parameter" (0A4) function in the
"diagnostics" (0A) function group.
The symbol appears on the display. Inputs are no longer possible.
If you try to change a parameter, the device jumps to the "unlock parameter" (0A4)
function. Enter "100".
Now change the parameters.
5.7.2 Hardware security locking
Press S, O and F simultaneously.
Inputs are no longer possible.
If you try to change a parameter, the following appears:
Press S, O and F simultaneously. The "unlock parameter" (0A4) function appears.
Enter "100"
Now change the parameters.
Note!
A hardware locking can only be unlocked again via the display by pressing the O, S
and F keys at the same time again. It is not possible to unlock the hardware by
communication.
5.8

Resetting the customer parameters

It is advisable to reset the customer parameters if you want to use a device with an
unknown history.
Effects of resetting:
• All customer parameters are reset to their default values.
• Customer interference echo suppression is not deleted.
• Linearisation is switched to "linear", but the table values are kept. The table can be
switched back on in the "linearisation" (04) function group in the
"linearisation" (041) function.
In order to carry out the reset, enter the number "333" in the "reset" (0A3) function in
the "diagnostics" (0A) function group.
Caution!
A reset may lead to impairment of the measurement. As a rule, a basic calibration is
required after a reset.
Note!
The default values of each parameter are shown in bold in the menu overview in the
appendix.