Siemens sitrans LR 400 Instruction Manual page 61

5.2: Customer Code (F = 0)
Determination of customer code
Value
Here you define the customer code (up to nine digits), with which you can protect the
device parameters against programming errors. It is strongly recommended that a
customer code be entered after all programming is completed to secure the programmed
values from changes. This is imperative for outdoor applications where rain drops may
inadvertently activate the optical control elements.
Use of the customer code is explained in Disabling and Enabling Programming on page
27.
5.3: Factory Reset (F = no)
Reset all parameters to factory setting
Value
This parameter allows you to reset all parameters to the original factory setting as
described in Parameters (HART) on page 30.
7ML19985FH03
up to 9-digit code
yes
no
SITRANS LR 400 – INSTRUCTION MANUAL Page 57