00580
Date Last Observation Normal Value
2000-10-28
Definition: This field contains the changes in the observation methods that would make values obtained from the old method not comparable with those obtained from the new method.
Null if there are no normals or units. If present, a change in this date compared to date-time recorded, the receiving system's test dictionary should trigger a manual review of the results to determine whether the new observation ID should be assigned a new ID in the local system to distinguish the new results from the old.
Length≤26
2 components
| 1 | O | - | time of an event | |
| 2 | O | - | degree of precision |