Legacy® PLUS - Smiths Medical
Legacy® PLUS - Smiths Medical
Legacy® PLUS - Smiths Medical
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Data Handling Software Safety Features<br />
Data Stored in RAM<br />
Section 5: Reference<br />
Before use, data associated with delivery and stored in RAM is tested<br />
by calculating a CRC on the data and then comparing it with the CRC<br />
stored with the data. If the stored and calculated CRCs do not match, the<br />
software will display a system fault screen, turn on a continuous twotone<br />
audible alarm, and stop all medication delivery.<br />
Data Stored in EEPROM<br />
Before use, data associated with delivery and stored in EEPROM is tested<br />
by calculating a CRC on the data and then comparing it with the CRC<br />
stored with the data. If the stored and calculated CRCs do not match, the<br />
software will display a system fault screen, turn on a continuous twotone<br />
audible alarm, and stop all medication delivery.<br />
Data Stored in NOVRAM<br />
Before use, data associated with delivery and stored in NOVRAM is<br />
tested by calculating a CRC on the data and then comparing it with<br />
the CRC stored with the data. If the stored and calculated CRCs do not<br />
match, the software will display a system fault screen, turn on a continuous<br />
two-tone audible alarm, and stop all medication delivery.<br />
Data Used in Calculations<br />
Calculations on data used in some way to control the delivery of medication<br />
are performed redundantly.<br />
The two calculated values are then compared. If the two values do not<br />
match, the software will display a system fault screen, turn on a continuous<br />
two-tone audible alarm, and stop all medication delivery.<br />
Timer Data Registers<br />
The data in the Real Time Clock is checked at regular intervals. If the<br />
data is not reasonable, the software will turn on a continuous two-tone<br />
audible alarm and stop all medication delivery.<br />
Reference