| 摘要 |
In particular for the measurement of blood glucose concentrations, portable diagnostic devices are disclosed that are user-friendly and safe to handle. A method is proposed which controls the range of functions of diagnostic devices and avoids incorrect operation of diagnostic devices of this kind, by substantially preventing unintentional and unnoticed alteration of critical parameters, typically system time and/or system date. The method includes a key-recognition step and an enable step. The key-recognition step determines whether at least one key module is connected to the diagnostic device. Depending on whether such a connection exists, the alteration of at least one critical parameter stored and/or generated in the diagnostic device is permitted or prevented in the enable step. A diagnostic device on which the method according to the invention can be implemented in one of its embodiments is also proposed, as is a corresponding key module, and also a diagnostic system which comprises a diagnostic device and at least one key module.
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