Page 60 - PBL614 IM/SM500F-EN SM500F ( WIRO)
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SM500F
Field mountable paperless recorder 6 Archiving
Fig. 6.4 Totalizer Log Sample – Text Format
Fig. 6.5 Audit Log Sample – Text Format
6.4.5 Text Format Data File Digital Signatures
A digital signature file is created for each channel data file using the same filename but with a *.S** extension. The file contains a unique 'fingerprint' of the contents of the data file that can be used to prove if the data has been tampered with or corrupted. Data validation can be carried out on a PC using the Company's DataManager software package.
6.4.6 Text Format Data Verification and Integrity
When data is saved to the archive media it is checked automatically to verify that the date value stored on the media matches exactly the date value stored in the internal memory.
58 IM/SM500F Rev. AA
