Use the Manage Meter Reading History action
in the Locations application to view or to update historical meter
readings. When you update a meter reading, the delta (change) readings
for that meter that are more recent than the date on which you make
the update are applied. Readings taken at a location might roll down
to the assets in that location if those assets are set up to accept
them. If you require an audit trail of original reading data before
an update, use the Audit feature.
Keep in mind the following considerations when updating meter history:
- A meter reading cannot be less than the previous meter reading
unless the meter has a rollover point. The same is true for historical
changes. A reading cannot exceed a subsequent reading if the meter
does not have a rollover point. Since a meter rollover might be changed,
the metadata, including rollover, for an inserted reading is copied
from the preceding reading.
- If a reading is deemed acceptable, the averages and cumulative
readings are recalculated and the change rolls down the asset hierarchy.
Verification is performed to see if any preventive maintenance is
due as a result of the meter reading change. This check is performed
on all assets whose meter readings are changed.
- Child records are updated as a result of a reading change, and
preventive maintenance checks are triggered for those assets. All METERREADING entries
for reading corrections include the time and date stamp and the user
identifier.
- Use the Meters application to insert a meter reading for a date
that is earlier than the current meter reading date. When such a record
is inserted, the mode of the meter update is verified for the next
reading in the history table. If that record was updated by specifying
a delta value, then the meter reading is recalculated for that record,
as well as for subsequent records that were recorded after the inserted
record date. This occurs until it reaches a record that was updated
by giving an actual meter reading. The history for the children that
were attached to the asset during the inserted record date is updated
as well by applying the delta reading of the parent. If the next reading
was updated by specifying an actual meter reading, then the inserted
record does not affect any subsequent readings.