MULTICAL® 803
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Kamstrup A/S · Technical description · 5512-2360_A1_
GB
_02.2019
3.4.13
Encryption level >T<
MULTICAL® 803 must be ordered with encrypted data transmission between module and reading system. Data is
encrypted with 128 bit AES counter mode encryption. Data transmission can be encrypted with either a common or
an individual encryption key.
If you select individual encryption key (T code 3), the reading system must know the encryption key of the individual
calculator in order to read the meter. The encryption key is sent to the customer and then ”matched” with the serial
number of the individual meter in the reading system.
If you select common encryption key (T code 2), the key can be used for reading a customer-specific number of
meters. The key is created by Kamstrup A/S. A customer can have several encryption keys, e.g. one for each meter
type.
Note: The common encryption key is only offered to customers on request.
The encryption level is configured as part of the calculator’s configuration number via the T code. Upon receipt of
order, the T code is by default configured at 3 - individual encryption key (unless otherwise informed by the
customer). The encryption level can be configured when submitting the order. The encryption level cannot be
changed after delivery.
Encryption level
T code
Encryption with common key (customer-specific)
2
Encryption with individual key
3
Encryption keys can be downloaded from Kamstrup’s customer portal “My Kamstrup” at
Encryption keys are automatically entered in USB Meter Reader and READy.
3.4.14
Customer label >VVVV<
A 20x50 mm customer label can be engraved on the calculator’s front. The customer label to be engraved on the
calculator’s front is determined by the calculator's configuration number VVVV code. The customer label can show
utility logo, a bar code or the like. By default, the calculator’s serial number is engraved in the customer label field.
Please contact Kamstrup A/S for information about possible customer labels as well as the creation of a new
customer label.
IMPORTANT: If the encryption key in the meter is changed after the meter is supplied, and the encryption type
is thus changed from individual to common key or vice versa, the T code is not changed. The T code shown in
the meter’s display always indicates with which encryption type the meter was ordered and not the current
encryption type of the meter.