Defining the unit of measure (UOM) mappings

Map the UOMs provided by Itron OpenWay to units required for storage by IEE. For example, a channel of watt hour delivered data can be identified as "Whd" or "Wh d" in the Itron OpenWay message, while IEE can store the data with a unit of measure short cut like KWH_DEL. As a result, when the IEE DeviceComm service interface receives a reading message from Itron OpenWay, the quantity identifier provided by Itron OpenWay (Wh d for example) is mapped to a known IEE unit. This mapping accomplishes the following:

It identifies the scaling factor that must be applied to the Itron OpenWay units to scale them to the correct IEE unit. For example, to scale Wh values to kWh values, the Wh value must be divided by 1,000.
It identifies the correct service point channel against which the scaled reading is stored. Itron OpenWay does not identify meter channels by a numeric ID, which has traditionally been the expectation of IEE. Instead, Itron OpenWay uses the UOM (or quantity identifier) to uniquely identify a given channel of data.

To address these requirements of the UOM look-up process, an addressing scheme was added to the IEE Readings Import XML schema called EndPointUOMID. The following example shows the schema from a test file.

<ChannelID EndPointUOMID="2.16.840.1.114416.3.20000001:Wh d" />

IEE provides scripts to add UOMs for both Oracle and SQL databases. To map UOMs manually, use the Mapping the units of measure (UOM).

The Itron OpenWay energy reads are defined in the Itron OpenWay Collection Engine. For more information, see the chapter "Meter Management" in the OpenWay Collection Engine User Guide.