Siemens sitrans LR 400 Instruction Manual And Users Manual page 65

4.6.8.7: Reference Difference (F = approx. 106 m [calibration
value])
Internal reference distance
The length of the reference distance in the units system selected according to Parameter
4. 1 .5 is view-only. The device uses this value to calibrate itself so that no manual
adjustment is necessary in long-term operation.
5. Options
5.1: Enter Code
Input of customer code to enable programmability
Value
The device compares a code number which you enter here with the code defined in
Parameter 5.2. If your entry matches the customer code completely, it releases the
programming lock for all parameters. Any other code number locks and disables
programming.
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.
Use of the customer code is explained in Disabling and Enabling Programming on page
29.
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) beginning on page 32.
7ML19985FH04
Customer code
Up to 9-digit code
Yes
No
SITRANS LR 400 – INSTRUCTION MANUAL Page 62