MULTICAL® 803
Kamstrup A/S · Technical description · 5512-2360_A1_GB_02.2019
59
3.5.1
Serial number and extended availability
The serial number consists of 8 digits (xxxxxxxx/WW/yy). a two-digit device code for extended availability
(xxxxxxxx/WW/yy) as well as the production year (xxxxxxxx/WW/yy). The serial number (factory-set unique serial
number) is written on the calculator and cannot be changed after factory programming.
You need the encryption key of a specific calculator to be able to read the calculator via wireless M-Bus. This
encryption key is sent to the customer if the calculator is purchased directly from Kamstrup A/S. Customers who buy
their meters from wholesalers can download their encryption keys from Kamstrup’s “Encryption Key Service” where
the customer can create a user profile without contacting Kamstrup A/S. Next, the customer enters the calculator’s
serial number as well as the two digits (device code) for extended availability and downloads the encryption key. The
two digits have been introduced to provide a secure method for customers who buy Kamstrup meters from a
wholesaler to obtain the necessary encryption key.
xxxxxxxx/WW/19