MultiLevel Instruction Manual Other Information
Calibration-relevant Non-calibration-relevant
Height measurement User guidance
Inclination measurement Warning messages
Detection of wet leg sensors Ext. CAN-Bus (e.g. EMIS)
Temperature measurement Languages
Volume calculation Printer driver
Temperature-volume conversion Volume preset
Delivery control Data storage on chip card
Parameters Parameters
Example:
13.5.2. Memory partitioning without software separation
Calibration-relevant and non-calibration-
relevant parts are unsorted in the
memory.
One checksum for the entire memory.
In the case of changes in the non-
calibration-relevant area also: new
checksum; hence, new test by PTB.
Disadvantages:
• Each change in the software leads to a new
checksum.
• If changes are made to non-calibration-
relevant parts, this has undesired
consequences:
– The software must be tested and certified by the PTB.
– W&M seals must be broken in order to update the devices.
13.5.3. Memory partitioning with software separation
Calibration-relevant and non-calibration-
relevant parts are separated
Separate checksums.
In the case of changes in the non-
calibration-relevant area:
– Checksum of the calibration-
relevant area does not change
– no test by PTB
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